package eu.siacs.conversations.services;

import static eu.siacs.conversations.utils.Compatibility.s;
import static eu.siacs.conversations.utils.Random.SECURE_RANDOM;

import android.Manifest;
import android.annotation.SuppressLint;
import android.app.AlarmManager;
import android.app.KeyguardManager;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.content.pm.ServiceInfo;
import android.database.ContentObserver;
import android.graphics.Bitmap;
import android.graphics.drawable.AnimatedImageDrawable;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.media.AudioManager;
import android.net.ConnectivityManager;
import android.net.Network;
import android.net.NetworkCapabilities;
import android.net.NetworkInfo;
import android.net.Uri;
import android.os.Binder;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.IBinder;
import android.os.Messenger;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
import android.os.SystemClock;
import android.preference.PreferenceManager;
import android.provider.ContactsContract;
import android.provider.DocumentsContract;
import android.security.KeyChain;
import android.text.TextUtils;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.LruCache;
import android.util.Pair;
import androidx.annotation.BoolRes;
import androidx.annotation.IntegerRes;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.app.RemoteInput;
import androidx.core.content.ContextCompat;

import com.cheogram.android.EmojiSearch;
import com.cheogram.android.WebxdcUpdate;

import com.google.common.base.Objects;
import com.google.common.base.Optional;
import com.google.common.base.Strings;
import com.google.common.collect.Collections2;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Maps;
import com.google.common.collect.Multimap;
import com.google.common.io.Files;

import com.kedia.ogparser.JsoupProxy;
import com.kedia.ogparser.OpenGraphCallback;
import com.kedia.ogparser.OpenGraphParser;
import com.kedia.ogparser.OpenGraphResult;

import org.conscrypt.Conscrypt;
import org.jxmpp.stringprep.libidn.LibIdnXmppStringprep;
import org.openintents.openpgp.IOpenPgpService2;
import org.openintents.openpgp.util.OpenPgpApi;
import org.openintents.openpgp.util.OpenPgpServiceConnection;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.URI;
import java.security.Security;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;
import java.util.Set;
import java.util.WeakHashMap;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.Consumer;

import io.ipfs.cid.Cid;

import com.google.common.util.concurrent.FutureCallback;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.MoreExecutors;
import eu.siacs.conversations.AppSettings;
import eu.siacs.conversations.Config;
import eu.siacs.conversations.R;
import eu.siacs.conversations.android.JabberIdContact;
import eu.siacs.conversations.crypto.OmemoSetting;
import eu.siacs.conversations.crypto.PgpDecryptionService;
import eu.siacs.conversations.crypto.PgpEngine;
import eu.siacs.conversations.crypto.axolotl.AxolotlService;
import eu.siacs.conversations.crypto.axolotl.FingerprintStatus;
import eu.siacs.conversations.crypto.axolotl.XmppAxolotlMessage;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.entities.Blockable;
import eu.siacs.conversations.entities.Bookmark;
import eu.siacs.conversations.entities.Contact;
import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.entities.Conversational;
import eu.siacs.conversations.entities.DownloadableFile;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.entities.MucOptions;
import eu.siacs.conversations.entities.MucOptions.OnRenameListener;
import eu.siacs.conversations.entities.Presence;
import eu.siacs.conversations.entities.PresenceTemplate;
import eu.siacs.conversations.entities.Reaction;
import eu.siacs.conversations.entities.Roster;
import eu.siacs.conversations.entities.ServiceDiscoveryResult;
import eu.siacs.conversations.generator.AbstractGenerator;
import eu.siacs.conversations.generator.IqGenerator;
import eu.siacs.conversations.generator.MessageGenerator;
import eu.siacs.conversations.generator.PresenceGenerator;
import eu.siacs.conversations.http.HttpConnectionManager;
import eu.siacs.conversations.http.ServiceOutageStatus;
import eu.siacs.conversations.parser.AbstractParser;
import eu.siacs.conversations.parser.IqParser;
import eu.siacs.conversations.persistance.DatabaseBackend;
import eu.siacs.conversations.persistance.FileBackend;
import eu.siacs.conversations.persistance.UnifiedPushDatabase;
import eu.siacs.conversations.receiver.SystemEventReceiver;
import eu.siacs.conversations.ui.ChooseAccountForProfilePictureActivity;
import eu.siacs.conversations.ui.ConversationsActivity;
import eu.siacs.conversations.ui.RtpSessionActivity;
import eu.siacs.conversations.ui.UiCallback;
import eu.siacs.conversations.ui.interfaces.OnAvatarPublication;
import eu.siacs.conversations.ui.interfaces.OnMediaLoaded;
import eu.siacs.conversations.ui.interfaces.OnSearchResultsAvailable;
import eu.siacs.conversations.ui.util.QuoteHelper;
import eu.siacs.conversations.utils.AccountUtils;
import eu.siacs.conversations.utils.Compatibility;
import eu.siacs.conversations.utils.ConversationsFileObserver;
import eu.siacs.conversations.utils.CryptoHelper;
import eu.siacs.conversations.utils.Emoticons;
import eu.siacs.conversations.utils.EasyOnboardingInvite;
import eu.siacs.conversations.utils.ExceptionHelper;
import eu.siacs.conversations.utils.FileUtils;
import eu.siacs.conversations.utils.MessageUtils;
import eu.siacs.conversations.utils.Emoticons;
import eu.siacs.conversations.utils.MimeUtils;
import eu.siacs.conversations.utils.PhoneHelper;
import eu.siacs.conversations.utils.QuickLoader;
import eu.siacs.conversations.utils.ReplacingSerialSingleThreadExecutor;
import eu.siacs.conversations.utils.ReplacingTaskManager;
import eu.siacs.conversations.utils.Resolver;
import eu.siacs.conversations.utils.SerialSingleThreadExecutor;
import eu.siacs.conversations.utils.StringUtils;
import eu.siacs.conversations.utils.TorServiceUtils;
import eu.siacs.conversations.utils.ThemeHelper;
import eu.siacs.conversations.utils.WakeLockHelper;
import eu.siacs.conversations.utils.XmppUri;
import eu.siacs.conversations.xml.Element;
import eu.siacs.conversations.xml.LocalizedContent;
import eu.siacs.conversations.xml.Namespace;
import eu.siacs.conversations.xmpp.Jid;
import eu.siacs.conversations.xmpp.OnContactStatusChanged;
import eu.siacs.conversations.xmpp.OnGatewayResult;
import eu.siacs.conversations.xmpp.OnKeyStatusUpdated;
import eu.siacs.conversations.xmpp.OnMessageAcknowledged;
import eu.siacs.conversations.xmpp.OnStatusChanged;
import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
import eu.siacs.conversations.xmpp.XmppConnection;
import eu.siacs.conversations.xmpp.chatstate.ChatState;
import eu.siacs.conversations.xmpp.forms.Data;
import eu.siacs.conversations.xmpp.jingle.AbstractJingleConnection;
import eu.siacs.conversations.xmpp.jingle.JingleConnectionManager;
import eu.siacs.conversations.xmpp.jingle.JingleRtpConnection;
import eu.siacs.conversations.xmpp.jingle.Media;
import eu.siacs.conversations.xmpp.jingle.RtpEndUserState;
import eu.siacs.conversations.xmpp.mam.MamReference;
import eu.siacs.conversations.xmpp.pep.Avatar;
import eu.siacs.conversations.xmpp.pep.PublishOptions;
import im.conversations.android.xmpp.model.avatar.Metadata;
import im.conversations.android.xmpp.model.bookmark.Storage;
import im.conversations.android.xmpp.model.mds.Displayed;
import im.conversations.android.xmpp.model.pubsub.PubSub;
import im.conversations.android.xmpp.model.stanza.Iq;
import im.conversations.android.xmpp.model.storage.PrivateStorage;
import java.io.File;
import java.security.Security;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;
import java.util.Set;
import java.util.WeakHashMap;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.Consumer;
import me.leolin.shortcutbadger.ShortcutBadger;
import okhttp3.HttpUrl;
import org.conscrypt.Conscrypt;
import org.jxmpp.stringprep.libidn.LibIdnXmppStringprep;
import org.openintents.openpgp.IOpenPgpService2;
import org.openintents.openpgp.util.OpenPgpApi;
import org.openintents.openpgp.util.OpenPgpServiceConnection;

import okhttp3.HttpUrl;
import okhttp3.OkHttpClient;

public class XmppConnectionService extends Service {

    public static final String ACTION_REPLY_TO_CONVERSATION = "reply_to_conversations";
    public static final String ACTION_MARK_AS_READ = "mark_as_read";
    public static final String ACTION_SNOOZE = "snooze";
    public static final String ACTION_CLEAR_MESSAGE_NOTIFICATION = "clear_message_notification";
    public static final String ACTION_CLEAR_MISSED_CALL_NOTIFICATION =
            "clear_missed_call_notification";
    public static final String ACTION_DISMISS_ERROR_NOTIFICATIONS = "dismiss_error";
    public static final String ACTION_TRY_AGAIN = "try_again";

    public static final String ACTION_TEMPORARILY_DISABLE = "temporarily_disable";
    public static final String ACTION_PING = "ping";
    public static final String ACTION_IDLE_PING = "idle_ping";
    public static final String ACTION_INTERNAL_PING = "internal_ping";
    public static final String ACTION_FCM_TOKEN_REFRESH = "fcm_token_refresh";
    public static final String ACTION_FCM_MESSAGE_RECEIVED = "fcm_message_received";
    public static final String ACTION_DISMISS_CALL = "dismiss_call";
    public static final String ACTION_END_CALL = "end_call";
    public static final String ACTION_STARTING_CALL = "starting_call";
    public static final String ACTION_PROVISION_ACCOUNT = "provision_account";
    public static final String ACTION_CALL_INTEGRATION_SERVICE_STARTED =
            "call_integration_service_started";
    private static final String ACTION_POST_CONNECTIVITY_CHANGE =
            "eu.siacs.conversations.POST_CONNECTIVITY_CHANGE";
    public static final String ACTION_RENEW_UNIFIED_PUSH_ENDPOINTS =
            "eu.siacs.conversations.UNIFIED_PUSH_RENEW";
    public static final String ACTION_QUICK_LOG = "eu.siacs.conversations.QUICK_LOG";

    private static final String SETTING_LAST_ACTIVITY_TS = "last_activity_timestamp";

    public final CountDownLatch restoredFromDatabaseLatch = new CountDownLatch(1);
    private static final Executor FILE_OBSERVER_EXECUTOR = Executors.newSingleThreadExecutor();
    public static final Executor FILE_ATTACHMENT_EXECUTOR = Executors.newSingleThreadExecutor();

    private final ScheduledExecutorService internalPingExecutor =
            Executors.newSingleThreadScheduledExecutor();
    private static final SerialSingleThreadExecutor VIDEO_COMPRESSION_EXECUTOR =
            new SerialSingleThreadExecutor("VideoCompression");
    private final SerialSingleThreadExecutor mDatabaseWriterExecutor =
            new SerialSingleThreadExecutor("DatabaseWriter");
    private final SerialSingleThreadExecutor mDatabaseReaderExecutor =
            new SerialSingleThreadExecutor("DatabaseReader");
    private final SerialSingleThreadExecutor mNotificationExecutor =
            new SerialSingleThreadExecutor("NotificationExecutor");
    private final ReplacingTaskManager mRosterSyncTaskManager = new ReplacingTaskManager();
    private final IBinder mBinder = new XmppConnectionBinder();
    private final List<Conversation> conversations = new CopyOnWriteArrayList<>();
    private final IqGenerator mIqGenerator = new IqGenerator(this);
    private final Set<String> mInProgressAvatarFetches = new HashSet<>();
    private final Set<String> mOmittedPepAvatarFetches = new HashSet<>();
    private final HashSet<Jid> mLowPingTimeoutMode = new HashSet<>();
    private final Consumer<Iq> mDefaultIqHandler =
            (packet) -> {
                if (packet.getType() != Iq.Type.RESULT) {
                    final var error = packet.getError();
                    String text = error != null ? error.findChildContent("text") : null;
                    if (text != null) {
                        Log.d(Config.LOGTAG, "received iq error: " + text);
                    }
                }
            };
    public DatabaseBackend databaseBackend;
    private Multimap<String, String> mutedMucUsers;
    private final ReplacingSerialSingleThreadExecutor mContactMergerExecutor = new ReplacingSerialSingleThreadExecutor("ContactMerger");
    private final ReplacingSerialSingleThreadExecutor mStickerScanExecutor = new ReplacingSerialSingleThreadExecutor("StickerScan");
    private long mLastActivity = 0;
    private long mLastMucPing = 0;
    private Map<String, Message> mScheduledMessages = new HashMap<>();
    private long mLastStickerRescan = 0;
    private final AppSettings appSettings = new AppSettings(this);
    private final FileBackend fileBackend = new FileBackend(this);
    private MemorizingTrustManager mMemorizingTrustManager;
    private final NotificationService mNotificationService = new NotificationService(this);
    private final UnifiedPushBroker unifiedPushBroker = new UnifiedPushBroker(this);
    private final ChannelDiscoveryService mChannelDiscoveryService =
            new ChannelDiscoveryService(this);
    private final ShortcutService mShortcutService = new ShortcutService(this);
    private final AtomicBoolean mInitialAddressbookSyncCompleted = new AtomicBoolean(false);
    private final AtomicBoolean mOngoingVideoTranscoding = new AtomicBoolean(false);
    private final AtomicBoolean mForceDuringOnCreate = new AtomicBoolean(false);
    private final AtomicReference<OngoingCall> ongoingCall = new AtomicReference<>();
    private final MessageGenerator mMessageGenerator = new MessageGenerator(this);
    public OnContactStatusChanged onContactStatusChanged =
            (contact, online) -> {
                final var conversation = find(contact);
                if (conversation == null) {
                    return;
                }
                if (online) {
                    if (contact.getPresences().size() == 1) {
                        sendUnsentMessages(conversation);
                    }
                }
            };
    private final PresenceGenerator mPresenceGenerator = new PresenceGenerator(this);
    private List<Account> accounts;
    private final JingleConnectionManager mJingleConnectionManager =
            new JingleConnectionManager(this);
    private final HttpConnectionManager mHttpConnectionManager = new HttpConnectionManager(this);
    private final AvatarService mAvatarService = new AvatarService(this);
    private final MessageArchiveService mMessageArchiveService = new MessageArchiveService(this);
    private final PushManagementService mPushManagementService = new PushManagementService(this);
    private final QuickConversationsService mQuickConversationsService =
            new QuickConversationsService(this);
    private final ConversationsFileObserver fileObserver =
            new ConversationsFileObserver(
                    Environment.getExternalStorageDirectory().getAbsolutePath()) {
                @Override
                public void onEvent(final int event, final File file) {
                    markFileDeleted(file);
                }
            };
    private final OnMessageAcknowledged mOnMessageAcknowledgedListener =
            new OnMessageAcknowledged() {

                @Override
                public boolean onMessageAcknowledged(
                        final Account account, final Jid to, final String id) {
                    if (id.startsWith(JingleRtpConnection.JINGLE_MESSAGE_PROPOSE_ID_PREFIX)) {
                        final String sessionId =
                                id.substring(
                                        JingleRtpConnection.JINGLE_MESSAGE_PROPOSE_ID_PREFIX
                                                .length());
                        mJingleConnectionManager.updateProposedSessionDiscovered(
                                account,
                                to,
                                sessionId,
                                JingleConnectionManager.DeviceDiscoveryState
                                        .SEARCHING_ACKNOWLEDGED);
                    }

                    final Jid bare = to.asBareJid();

                    for (final Conversation conversation : getConversations()) {
                        if (conversation.getAccount() == account
                                && conversation.getJid().asBareJid().equals(bare)) {
                            final Message message = conversation.findUnsentMessageWithUuid(id);
                            if (message != null) {
                                message.setStatus(Message.STATUS_SEND);
                                message.setErrorMessage(null);
                                databaseBackend.updateMessage(message, false);
                                return true;
                            }
                        }
                    }
                    return false;
                }
            };

    private final AtomicBoolean diallerIntegrationActive = new AtomicBoolean(false);

    public void setDiallerIntegrationActive(boolean active) {
      diallerIntegrationActive.set(active);
    }

    private boolean destroyed = false;

    private int unreadCount = -1;

    // Ui callback listeners
    private final Set<OnConversationUpdate> mOnConversationUpdates =
            Collections.newSetFromMap(new WeakHashMap<OnConversationUpdate, Boolean>());
    private final Set<OnShowErrorToast> mOnShowErrorToasts =
            Collections.newSetFromMap(new WeakHashMap<OnShowErrorToast, Boolean>());
    private final Set<OnAccountUpdate> mOnAccountUpdates =
            Collections.newSetFromMap(new WeakHashMap<OnAccountUpdate, Boolean>());
    private final Set<OnCaptchaRequested> mOnCaptchaRequested =
            Collections.newSetFromMap(new WeakHashMap<OnCaptchaRequested, Boolean>());
    private final Set<OnRosterUpdate> mOnRosterUpdates =
            Collections.newSetFromMap(new WeakHashMap<OnRosterUpdate, Boolean>());
    private final Set<OnUpdateBlocklist> mOnUpdateBlocklist =
            Collections.newSetFromMap(new WeakHashMap<OnUpdateBlocklist, Boolean>());
    private final Set<OnMucRosterUpdate> mOnMucRosterUpdate =
            Collections.newSetFromMap(new WeakHashMap<OnMucRosterUpdate, Boolean>());
    private final Set<OnKeyStatusUpdated> mOnKeyStatusUpdated =
            Collections.newSetFromMap(new WeakHashMap<OnKeyStatusUpdated, Boolean>());
    private final Set<OnJingleRtpConnectionUpdate> onJingleRtpConnectionUpdate =
            Collections.newSetFromMap(new WeakHashMap<OnJingleRtpConnectionUpdate, Boolean>());

    private final Object LISTENER_LOCK = new Object();

    public final Set<String> FILENAMES_TO_IGNORE_DELETION = new HashSet<>();

    private final AtomicLong mLastExpiryRun = new AtomicLong(0);
    private final LruCache<Pair<String, String>, ServiceDiscoveryResult> discoCache =
            new LruCache<>(20);
    private final OnStatusChanged statusListener =
            new OnStatusChanged() {

                @Override
                public void onStatusChanged(final Account account) {
                    final var status = account.getStatus();
                    if (ServiceOutageStatus.isPossibleOutage(status)) {
                        fetchServiceOutageStatus(account);
                    }
                    XmppConnection connection = account.getXmppConnection();
                    updateAccountUi();

                    if (account.getStatus() == Account.State.ONLINE
                            || account.getStatus().isError()) {
                        mQuickConversationsService.signalAccountStateChange();
                    }

                    if (account.getStatus() == Account.State.ONLINE) {
                        synchronized (mLowPingTimeoutMode) {
                            if (mLowPingTimeoutMode.remove(account.getJid().asBareJid())) {
                                Log.d(
                                        Config.LOGTAG,
                                        account.getJid().asBareJid()
                                                + ": leaving low ping timeout mode");
                            }
                        }
                        if (account.setShowErrorNotification(true)) {
                            databaseBackend.updateAccount(account);
                        }
                        mMessageArchiveService.executePendingQueries(account);
                        if (connection != null && connection.getFeatures().csi()) {
                            if (checkListeners()) {
                                Log.d(
                                        Config.LOGTAG,
                                        account.getJid().asBareJid() + " sending csi//inactive");
                                connection.sendInactive();
                            } else {
                                Log.d(
                                        Config.LOGTAG,
                                        account.getJid().asBareJid() + " sending csi//active");
                                connection.sendActive();
                            }
                        }
                        List<Conversation> conversations = getConversations();
                        for (Conversation conversation : conversations) {
                            final boolean inProgressJoin;
                            synchronized (account.inProgressConferenceJoins) {
                                inProgressJoin =
                                        account.inProgressConferenceJoins.contains(conversation);
                            }
                            final boolean pendingJoin;
                            synchronized (account.pendingConferenceJoins) {
                                pendingJoin = account.pendingConferenceJoins.contains(conversation);
                            }
                            if (conversation.getAccount() == account
                                    && !pendingJoin
                                    && !inProgressJoin) {
                                sendUnsentMessages(conversation);
                            }
                        }
                        final List<Conversation> pendingLeaves;
                        synchronized (account.pendingConferenceLeaves) {
                            pendingLeaves = new ArrayList<>(account.pendingConferenceLeaves);
                            account.pendingConferenceLeaves.clear();
                        }
                        for (Conversation conversation : pendingLeaves) {
                            leaveMuc(conversation);
                        }
                        final List<Conversation> pendingJoins;
                        synchronized (account.pendingConferenceJoins) {
                            pendingJoins = new ArrayList<>(account.pendingConferenceJoins);
                            account.pendingConferenceJoins.clear();
                        }
                        for (Conversation conversation : pendingJoins) {
                            joinMuc(conversation);
                        }
                        scheduleWakeUpCall(
                                Config.PING_MAX_INTERVAL * 1000L, account.getUuid().hashCode());
                    } else if (account.getStatus() == Account.State.OFFLINE
                            || account.getStatus() == Account.State.DISABLED
                            || account.getStatus() == Account.State.LOGGED_OUT) {
                        resetSendingToWaiting(account);
                        if (account.isConnectionEnabled() && isInLowPingTimeoutMode(account)) {
                            Log.d(
                                    Config.LOGTAG,
                                    account.getJid().asBareJid()
                                            + ": went into offline state during low ping mode."
                                            + " reconnecting now");
                            reconnectAccount(account, true, false);
                        } else {
                            final int timeToReconnect = SECURE_RANDOM.nextInt(10) + 2;
                            scheduleWakeUpCall(timeToReconnect, account.getUuid().hashCode());
                        }
                    } else if (account.getStatus() == Account.State.REGISTRATION_SUCCESSFUL) {
                        databaseBackend.updateAccount(account);
                        reconnectAccount(account, true, false);
                    } else if (account.getStatus() != Account.State.CONNECTING
                            && account.getStatus() != Account.State.NO_INTERNET) {
                        resetSendingToWaiting(account);
                        if (connection != null && account.getStatus().isAttemptReconnect()) {
                            final boolean aggressive =
                                    account.getStatus() == Account.State.SEE_OTHER_HOST
                                            || hasJingleRtpConnection(account);
                            final int next = connection.getTimeToNextAttempt(aggressive);
                            final boolean lowPingTimeoutMode = isInLowPingTimeoutMode(account);
                            if (next <= 0) {
                                Log.d(
                                        Config.LOGTAG,
                                        account.getJid().asBareJid()
                                                + ": error connecting account. reconnecting now."
                                                + " lowPingTimeout="
                                                + lowPingTimeoutMode);
                                reconnectAccount(account, true, false);
                            } else {
                                final int attempt = connection.getAttempt() + 1;
                                Log.d(
                                        Config.LOGTAG,
                                        account.getJid().asBareJid()
                                                + ": error connecting account. try again in "
                                                + next
                                                + "s for the "
                                                + attempt
                                                + " time. lowPingTimeout="
                                                + lowPingTimeoutMode
                                                + ", aggressive="
                                                + aggressive);
                                scheduleWakeUpCall(next, account.getUuid().hashCode());
                                if (aggressive) {
                                    internalPingExecutor.schedule(
                                            XmppConnectionService.this
                                                    ::manageAccountConnectionStatesInternal,
                                            (next * 1000L) + 50,
                                            TimeUnit.MILLISECONDS);
                                }
                            }
                        }
                    }
                    getNotificationService().updateErrorNotification();
                }
            };

    private OpenPgpServiceConnection pgpServiceConnection;
    private PgpEngine mPgpEngine = null;
    private WakeLock wakeLock;
    private LruCache<String, Drawable> mDrawableCache;
    private final BroadcastReceiver mInternalEventReceiver = new InternalEventReceiver();
    private final BroadcastReceiver mInternalRestrictedEventReceiver =
            new RestrictedEventReceiver(Arrays.asList(TorServiceUtils.ACTION_STATUS));
    private final BroadcastReceiver mInternalScreenEventReceiver = new InternalEventReceiver();
    private EmojiSearch emojiSearch = null;

    private static String generateFetchKey(Account account, final Avatar avatar) {
        return account.getJid().asBareJid() + "_" + avatar.owner + "_" + avatar.sha1sum;
    }

    private boolean isInLowPingTimeoutMode(Account account) {
        synchronized (mLowPingTimeoutMode) {
            return mLowPingTimeoutMode.contains(account.getJid().asBareJid());
        }
    }

    public void startOngoingVideoTranscodingForegroundNotification() {
        mOngoingVideoTranscoding.set(true);
        toggleForegroundService();
    }

    public void stopOngoingVideoTranscodingForegroundNotification() {
        mOngoingVideoTranscoding.set(false);
        toggleForegroundService();
    }

    public boolean areMessagesInitialized() {
        return this.restoredFromDatabaseLatch.getCount() == 0;
    }

    public PgpEngine getPgpEngine() {
        if (!Config.supportOpenPgp()) {
            return null;
        } else if (pgpServiceConnection != null && pgpServiceConnection.isBound()) {
            if (this.mPgpEngine == null) {
                this.mPgpEngine =
                        new PgpEngine(
                                new OpenPgpApi(
                                        getApplicationContext(), pgpServiceConnection.getService()),
                                this);
            }
            return mPgpEngine;
        } else {
            return null;
        }
    }

    public OpenPgpApi getOpenPgpApi() {
        if (!Config.supportOpenPgp()) {
            return null;
        } else if (pgpServiceConnection != null && pgpServiceConnection.isBound()) {
            return new OpenPgpApi(this, pgpServiceConnection.getService());
        } else {
            return null;
        }
    }

    public AppSettings getAppSettings() {
        return this.appSettings;
    }

    public FileBackend getFileBackend() {
        return this.fileBackend;
    }

    public DownloadableFile getFileForCid(Cid cid) {
        return this.databaseBackend.getFileForCid(cid);
    }

    public String getUrlForCid(Cid cid) {
        return this.databaseBackend.getUrlForCid(cid);
    }

    public void saveCid(Cid cid, File file) throws BlockedMediaException {
        saveCid(cid, file, null);
    }

    public void saveCid(Cid cid, File file, String url) throws BlockedMediaException {
        if (this.databaseBackend.isBlockedMedia(cid)) {
            throw new BlockedMediaException();
        }
        this.databaseBackend.saveCid(cid, file, url);
    }

    public boolean muteMucUser(MucOptions.User user) {
        boolean muted = databaseBackend.muteMucUser(user);
        if (!muted) return false;
        mutedMucUsers.put(user.getMuc().toString(), user.getOccupantId());
        return true;
    }

    public boolean unmuteMucUser(MucOptions.User user) {
        boolean unmuted = databaseBackend.unmuteMucUser(user);
        if (!unmuted) return false;
        mutedMucUsers.remove(user.getMuc().toString(), user.getOccupantId());
        return true;
    }

    public boolean isMucUserMuted(MucOptions.User user) {
        return mutedMucUsers.containsEntry("" + user.getMuc(), user.getOccupantId());
    }

    public void blockMedia(File f) {
        try {
            Cid[] cids = getFileBackend().calculateCids(new FileInputStream(f));
            for (Cid cid : cids) {
                blockMedia(cid);
            }
        } catch (final IOException e) { }
    }

    public void blockMedia(Cid cid) {
        this.databaseBackend.blockMedia(cid);
    }

    public void clearBlockedMedia() {
        this.databaseBackend.clearBlockedMedia();
    }

    public Message getMessage(Conversation conversation, String uuid) {
        return this.databaseBackend.getMessage(conversation, uuid);
    }

    public Map<String, Message> getMessageFuzzyIds(Conversation conversation, Collection<String> ids) {
        return this.databaseBackend.getMessageFuzzyIds(conversation, ids);
    }

    public void insertWebxdcUpdate(final WebxdcUpdate update) {
        this.databaseBackend.insertWebxdcUpdate(update);
    }

    public WebxdcUpdate findLastWebxdcUpdate(Message message) {
        return this.databaseBackend.findLastWebxdcUpdate(message);
    }

    public List<WebxdcUpdate> findWebxdcUpdates(Message message, long serial) {
        return this.databaseBackend.findWebxdcUpdates(message, serial);
    }

    public AvatarService getAvatarService() {
        return this.mAvatarService;
    }

    public void attachLocationToConversation(
            final Conversation conversation, final Uri uri, final String subject, final UiCallback<Message> callback) {
        int encryption = conversation.getNextEncryption();
        if (encryption == Message.ENCRYPTION_PGP) {
            encryption = Message.ENCRYPTION_DECRYPTED;
        }
        Message message = new Message(conversation, uri.toString(), encryption);
        if (subject != null && subject.length() > 0) message.setSubject(subject);
        message.setThread(conversation.getThread());
        Message.configurePrivateMessage(message);
        if (encryption == Message.ENCRYPTION_DECRYPTED) {
            getPgpEngine().encrypt(message, callback);
        } else {
            sendMessage(message);
            callback.success(message);
        }
    }

    public void attachFileToConversation(
            final Conversation conversation,
            final Uri uri,
            final String type,
            final String subject,
            final UiCallback<Message> callback) {
        final Message message;
        if (conversation.getReplyTo() == null) {
            message = new Message(conversation, "", conversation.getNextEncryption());
        } else {
            message = conversation.getReplyTo().reply();
            message.setEncryption(conversation.getNextEncryption());
        }
        if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
            message.setEncryption(Message.ENCRYPTION_DECRYPTED);
        }
        if (subject != null && subject.length() > 0) message.setSubject(subject);
        message.setThread(conversation.getThread());
        if (!Message.configurePrivateFileMessage(message)) {
            message.setCounterpart(conversation.getNextCounterpart());
            message.setType(Message.TYPE_FILE);
        }
        Log.d(Config.LOGTAG, "attachFile: type=" + message.getType());
        Log.d(Config.LOGTAG, "counterpart=" + message.getCounterpart());
        final AttachFileToConversationRunnable runnable =
                new AttachFileToConversationRunnable(this, uri, type, message, callback);
        if (runnable.isVideoMessage()) {
            VIDEO_COMPRESSION_EXECUTOR.execute(runnable);
        } else {
            FILE_ATTACHMENT_EXECUTOR.execute(runnable);
        }
    }

    public void attachImageToConversation(
            final Conversation conversation,
            final Uri uri,
            final String type,
            final String subject,
            final UiCallback<Message> callback) {
        final String mimeType = MimeUtils.guessMimeTypeFromUriAndMime(this, uri, type);
        final String compressPictures = getCompressPicturesPreference();

        if ("never".equals(compressPictures)
                || ("auto".equals(compressPictures) && getFileBackend().useImageAsIs(uri))
                || (mimeType != null && mimeType.endsWith("/gif"))
                || getFileBackend().unusualBounds(uri) || "data".equals(uri.getScheme())) {
            Log.d(Config.LOGTAG, conversation.getAccount().getJid().asBareJid() + ": not compressing picture. sending as file");
            attachFileToConversation(conversation, uri, mimeType, subject, callback);
            return;
        }
        final Message message;

        if (conversation.getReplyTo() == null) {
            message = new Message(conversation, "", conversation.getNextEncryption());
        } else {
            message = conversation.getReplyTo().reply();
            message.setEncryption(conversation.getNextEncryption());
        }
        if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
            message.setEncryption(Message.ENCRYPTION_DECRYPTED);
        }
        if (subject != null && subject.length() > 0) message.setSubject(subject);
        message.setThread(conversation.getThread());
        if (!Message.configurePrivateFileMessage(message)) {
            message.setCounterpart(conversation.getNextCounterpart());
            message.setType(Message.TYPE_IMAGE);
        }
        Log.d(Config.LOGTAG, "attachImage: type=" + message.getType());
        FILE_ATTACHMENT_EXECUTOR.execute(() -> {
            try {
                getFileBackend().copyImageToPrivateStorage(message, uri);
            } catch (FileBackend.ImageCompressionException e) {
                Log.d(Config.LOGTAG, "unable to compress image. fall back to file transfer", e);
                attachFileToConversation(conversation, uri, mimeType, subject, callback);
                return;
            } catch (final FileBackend.FileCopyException e) {
                callback.error(e.getResId(), message);
                return;
            }
            if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
                final PgpEngine pgpEngine = getPgpEngine();
                if (pgpEngine != null) {
                    pgpEngine.encrypt(message, callback);
                } else if (callback != null) {
                    callback.error(R.string.unable_to_connect_to_keychain, null);
                }
            } else {
                sendMessage(message, false, false, false, () -> callback.success(message));
            }
        });
    }

    private File stickerDir() {
        SharedPreferences p = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
        final String dir = p.getString("sticker_directory", "Stickers");
        if (dir.startsWith("content://")) {
            Uri uri = Uri.parse(dir);
            uri = DocumentsContract.buildDocumentUriUsingTree(uri, DocumentsContract.getTreeDocumentId(uri));
            return new File(FileUtils.getPath(getBaseContext(), uri));
        } else {
            return new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/" + dir);
        }
    }

    public void rescanStickers() {
        long msToRescan = (mLastStickerRescan + 600000L) - SystemClock.elapsedRealtime();
        if (msToRescan > 0) return;
        Log.d(Config.LOGTAG, "rescanStickers");

        mLastStickerRescan = SystemClock.elapsedRealtime();
        mStickerScanExecutor.execute(() -> {
            Thread.currentThread().setPriority(Thread.MIN_PRIORITY);
            try {
                for (File file : Files.fileTraverser().breadthFirst(stickerDir())) {
                    try {
                        if (file.isFile() && file.canRead()) {
                            DownloadableFile df = new DownloadableFile(file.getAbsolutePath());
                            Drawable icon = fileBackend.getThumbnail(df, getResources(), (int) (getResources().getDisplayMetrics().density * 288), false);
                            final String filename = Files.getNameWithoutExtension(df.getName());
                            Cid[] cids = fileBackend.calculateCids(new FileInputStream(df));
                            for (Cid cid : cids) {
                                saveCid(cid, file);
                            }
                            if (file.length() < 129000) {
                                emojiSearch.addEmoji(new EmojiSearch.CustomEmoji(filename, cids[0].toString(), icon, file.getParentFile().getName()));
                            }
                        }
                    } catch (final Exception e) {
                        Log.w(Config.LOGTAG, "rescanStickers: " + e);
                    }
                }
            } catch (final Exception e) {
                Log.w(Config.LOGTAG, "rescanStickers: " + e);
            }
        });
    }

    protected void cleanupCache() {
        if (Build.VERSION.SDK_INT < 26) return; // Doesn't support file.toPath
        mStickerScanExecutor.execute(() -> {
            Thread.currentThread().setPriority(Thread.MIN_PRIORITY);
            final var now = System.currentTimeMillis();
            try {
                for (File file : Files.fileTraverser().breadthFirst(getCacheDir())) {
                    if (file.isFile() && file.canRead() && file.canWrite()) {
                        final var attrs = java.nio.file.Files.readAttributes(file.toPath(), java.nio.file.attribute.BasicFileAttributes.class);
                        if ((now - attrs.lastAccessTime().toMillis()) > 1000L * 60 * 60 * 24 * 10) {
                            Log.d(Config.LOGTAG, "cleanupCache removing file not used recently: " + file);
                            file.delete();
                        }
                    }
                }
            } catch (final Exception e) {
                Log.w(Config.LOGTAG, "cleanupCache " + e);
            }
        });
    }

    public EmojiSearch emojiSearch() {
        return emojiSearch;
    }

    public Conversation find(Bookmark bookmark) {
        return find(bookmark.getAccount(), bookmark.getJid());
    }

    public Conversation find(final Account account, final Jid jid) {
        return find(getConversations(), account, jid);
    }

    public boolean isMuc(final Account account, final Jid jid) {
        final Conversation c = find(account, jid);
        return c != null && c.getMode() == Conversational.MODE_MULTI;
    }

    public void search(
            final List<String> term,
            final String uuid,
            final OnSearchResultsAvailable onSearchResultsAvailable) {
        MessageSearchTask.search(this, term, uuid, onSearchResultsAvailable);
    }

    @Override
    public int onStartCommand(final Intent intent, int flags, int startId) {
        final var nomedia = getBooleanPreference("nomedia", R.bool.default_nomedia);
        fileBackend.setupNomedia(nomedia);
        final String action = Strings.nullToEmpty(intent == null ? null : intent.getAction());
        final boolean needsForegroundService =
                intent != null
                        && intent.getBooleanExtra(
                                SystemEventReceiver.EXTRA_NEEDS_FOREGROUND_SERVICE, false);
        if (needsForegroundService) {
            Log.d(
                    Config.LOGTAG,
                    "toggle forced foreground service after receiving event (action="
                            + action
                            + ")");
            toggleForegroundService(true, action.equals(ACTION_STARTING_CALL));
        }
        final String uuid = intent == null ? null : intent.getStringExtra("uuid");
        switch (action) {
            case QuickConversationsService.SMS_RETRIEVED_ACTION:
                mQuickConversationsService.handleSmsReceived(intent);
                break;
            case ConnectivityManager.CONNECTIVITY_ACTION:
                if (hasInternetConnection()) {
                    if (Config.POST_CONNECTIVITY_CHANGE_PING_INTERVAL > 0) {
                        schedulePostConnectivityChange();
                    }
                    if (Config.RESET_ATTEMPT_COUNT_ON_NETWORK_CHANGE) {
                        resetAllAttemptCounts(true, false);
                    }
                    Resolver.clearCache();
                }
                break;
            case Intent.ACTION_SHUTDOWN:
                logoutAndSave(true);
                return START_NOT_STICKY;
            case ACTION_CLEAR_MESSAGE_NOTIFICATION:
                mNotificationExecutor.execute(
                        () -> {
                            try {
                                final Conversation c = findConversationByUuid(uuid);
                                if (c != null) {
                                    mNotificationService.clearMessages(c);
                                } else {
                                    mNotificationService.clearMessages();
                                }
                                restoredFromDatabaseLatch.await();

                            } catch (InterruptedException e) {
                                Log.d(
                                        Config.LOGTAG,
                                        "unable to process clear message notification");
                            }
                        });
                break;
            case ACTION_CLEAR_MISSED_CALL_NOTIFICATION:
                mNotificationExecutor.execute(
                        () -> {
                            try {
                                final Conversation c = findConversationByUuid(uuid);
                                if (c != null) {
                                    mNotificationService.clearMissedCalls(c);
                                } else {
                                    mNotificationService.clearMissedCalls();
                                }
                                restoredFromDatabaseLatch.await();

                            } catch (InterruptedException e) {
                                Log.d(
                                        Config.LOGTAG,
                                        "unable to process clear missed call notification");
                            }
                        });
                break;
            case ACTION_DISMISS_CALL:
                {
                    if (intent == null) {
                        break;
                    }
                    final String sessionId =
                            intent.getStringExtra(RtpSessionActivity.EXTRA_SESSION_ID);
                    Log.d(
                            Config.LOGTAG,
                            "received intent to dismiss call with session id " + sessionId);
                    mJingleConnectionManager.rejectRtpSession(sessionId);
                    break;
                }
            case TorServiceUtils.ACTION_STATUS:
                final String status =
                        intent == null ? null : intent.getStringExtra(TorServiceUtils.EXTRA_STATUS);
                // TODO port and host are in 'extras' - but this may not be a reliable source?
                if ("ON".equals(status)) {
                    handleOrbotStartedEvent();
                    return START_STICKY;
                }
                break;
            case ACTION_END_CALL:
                {
                    if (intent == null) {
                        break;
                    }
                    final String sessionId =
                            intent.getStringExtra(RtpSessionActivity.EXTRA_SESSION_ID);
                    Log.d(
                            Config.LOGTAG,
                            "received intent to end call with session id " + sessionId);
                    mJingleConnectionManager.endRtpSession(sessionId);
                }
                break;
            case ACTION_PROVISION_ACCOUNT:
                {
                    if (intent == null) {
                        break;
                    }
                    final String address = intent.getStringExtra("address");
                    final String password = intent.getStringExtra("password");
                    if (QuickConversationsService.isQuicksy()
                            || Strings.isNullOrEmpty(address)
                            || Strings.isNullOrEmpty(password)) {
                        break;
                    }
                    provisionAccount(address, password);
                    break;
                }
            case ACTION_DISMISS_ERROR_NOTIFICATIONS:
                dismissErrorNotifications();
                break;
            case ACTION_TRY_AGAIN:
                resetAllAttemptCounts(false, true);
                break;
            case ACTION_REPLY_TO_CONVERSATION:
                final Bundle remoteInput =
                        intent == null ? null : RemoteInput.getResultsFromIntent(intent);
                if (remoteInput == null) {
                    break;
                }
                final CharSequence body = remoteInput.getCharSequence("text_reply");
                final boolean dismissNotification =
                        intent.getBooleanExtra("dismiss_notification", false);
                final String lastMessageUuid = intent.getStringExtra("last_message_uuid");
                if (body == null || body.length() <= 0) {
                    break;
                }
                mNotificationExecutor.execute(
                        () -> {
                            try {
                                restoredFromDatabaseLatch.await();
                                final Conversation c = findConversationByUuid(uuid);
                                if (c != null) {
                                    directReply(
                                            c,
                                            body.toString(),
                                            lastMessageUuid,
                                            dismissNotification);
                                }
                            } catch (InterruptedException e) {
                                Log.d(Config.LOGTAG, "unable to process direct reply");
                            }
                        });
                break;
            case ACTION_MARK_AS_READ:
                mNotificationExecutor.execute(
                        () -> {
                            final Conversation c = findConversationByUuid(uuid);
                            if (c == null) {
                                Log.d(
                                        Config.LOGTAG,
                                        "received mark read intent for unknown conversation ("
                                                + uuid
                                                + ")");
                                return;
                            }
                            try {
                                restoredFromDatabaseLatch.await();
                                sendReadMarker(c, null);
                            } catch (InterruptedException e) {
                                Log.d(
                                        Config.LOGTAG,
                                        "unable to process notification read marker for"
                                                + " conversation "
                                                + c.getName());
                            }
                        });
                break;
            case ACTION_SNOOZE:
                mNotificationExecutor.execute(
                        () -> {
                            final Conversation c = findConversationByUuid(uuid);
                            if (c == null) {
                                Log.d(
                                        Config.LOGTAG,
                                        "received snooze intent for unknown conversation ("
                                                + uuid
                                                + ")");
                                return;
                            }
                            c.setMutedTill(System.currentTimeMillis() + 30 * 60 * 1000);
                            mNotificationService.clearMessages(c);
                            updateConversation(c);
                        });
            case AudioManager.RINGER_MODE_CHANGED_ACTION:
            case NotificationManager.ACTION_INTERRUPTION_FILTER_CHANGED:
                if (dndOnSilentMode()) {
                    refreshAllPresences();
                }
                break;
            case Intent.ACTION_SCREEN_ON:
                deactivateGracePeriod();
            case Intent.ACTION_USER_PRESENT:
            case Intent.ACTION_SCREEN_OFF:
                if (awayWhenScreenLocked()) {
                    refreshAllPresences();
                }
                break;
            case ACTION_FCM_TOKEN_REFRESH:
                refreshAllFcmTokens();
                break;
            case ACTION_RENEW_UNIFIED_PUSH_ENDPOINTS:
                if (intent == null) {
                    break;
                }
                final String instance = intent.getStringExtra("instance");
                final String application = intent.getStringExtra("application");
                final Messenger messenger = intent.getParcelableExtra("messenger");
                final UnifiedPushBroker.PushTargetMessenger pushTargetMessenger;
                if (messenger != null && application != null && instance != null) {
                    pushTargetMessenger =
                            new UnifiedPushBroker.PushTargetMessenger(
                                    new UnifiedPushDatabase.PushTarget(application, instance),
                                    messenger);
                    Log.d(Config.LOGTAG, "found push target messenger");
                } else {
                    pushTargetMessenger = null;
                }
                final Optional<UnifiedPushBroker.Transport> transport =
                        renewUnifiedPushEndpoints(pushTargetMessenger);
                if (instance != null && transport.isPresent()) {
                    unifiedPushBroker.rebroadcastEndpoint(messenger, instance, transport.get());
                }
                break;
            case ACTION_IDLE_PING:
                scheduleNextIdlePing();
                break;
            case ACTION_FCM_MESSAGE_RECEIVED:
                Log.d(Config.LOGTAG, "push message arrived in service. account");
                break;
            case ACTION_QUICK_LOG:
                final String message = intent == null ? null : intent.getStringExtra("message");
                if (message != null && Config.QUICK_LOG) {
                    quickLog(message);
                }
                break;
            case Intent.ACTION_SEND:
                final Uri uri = intent == null ? null : intent.getData();
                if (uri != null) {
                    Log.d(Config.LOGTAG, "received uri permission for " + uri);
                }
                return START_STICKY;
            case ACTION_TEMPORARILY_DISABLE:
                toggleSoftDisabled(true);
                if (checkListeners()) {
                    stopSelf();
                }
                return START_NOT_STICKY;
        }
        sendScheduledMessages();
        final var extras =  intent == null ? null : intent.getExtras();
        try {
            internalPingExecutor.execute(() -> manageAccountConnectionStates(action, extras));
        } catch (final RejectedExecutionException e) {
            Log.e(Config.LOGTAG, "can not schedule connection states manager");
        }
        if (SystemClock.elapsedRealtime() - mLastExpiryRun.get() >= Config.EXPIRY_INTERVAL) {
            expireOldMessages();
        }
        return START_STICKY;
    }

    private void quickLog(final String message) {
        if (Strings.isNullOrEmpty(message)) {
            return;
        }
        final Account account = AccountUtils.getFirstEnabled(this);
        if (account == null) {
            return;
        }
        final Conversation conversation =
                findOrCreateConversation(account, Config.BUG_REPORTS, false, true);
        final Message report = new Message(conversation, message, Message.ENCRYPTION_NONE);
        report.setStatus(Message.STATUS_RECEIVED);
        conversation.add(report);
        databaseBackend.createMessage(report);
        updateConversationUi();
    }

    private void manageAccountConnectionStatesInternal() {
        manageAccountConnectionStates(ACTION_INTERNAL_PING, null);
    }

    private synchronized void manageAccountConnectionStates(
            final String action, final Bundle extras) {
        final String pushedAccountHash = extras == null ? null : extras.getString("account");
        final boolean interactive = java.util.Objects.equals(ACTION_TRY_AGAIN, action);
        WakeLockHelper.acquire(wakeLock);
        boolean pingNow =
                ConnectivityManager.CONNECTIVITY_ACTION.equals(action)
                        || (Config.POST_CONNECTIVITY_CHANGE_PING_INTERVAL > 0
                                && ACTION_POST_CONNECTIVITY_CHANGE.equals(action));
        final HashSet<Account> pingCandidates = new HashSet<>();
        final String androidId = pushedAccountHash == null ? null : PhoneHelper.getAndroidId(this);
        for (final Account account : accounts) {
            final boolean pushWasMeantForThisAccount =
                    androidId != null
                            && CryptoHelper.getAccountFingerprint(account, androidId)
                                    .equals(pushedAccountHash);
            pingNow |=
                    processAccountState(
                            account,
                            interactive,
                            "ui".equals(action),
                            pushWasMeantForThisAccount,
                            pingCandidates);
        }
        if (pingNow) {
            for (final Account account : pingCandidates) {
                final var connection = account.getXmppConnection();
                final boolean lowTimeout = isInLowPingTimeoutMode(account);
                final var delta =
                        (SystemClock.elapsedRealtime() - connection.getLastPacketReceived())
                                / 1000L;
                connection.sendPing();
                Log.d(
                        Config.LOGTAG,
                        String.format(
                                "%s: send ping (action=%s,lowTimeout=%s,interval=%s)",
                                account.getJid().asBareJid(), action, lowTimeout, delta));
                scheduleWakeUpCall(
                        lowTimeout ? Config.LOW_PING_TIMEOUT : Config.PING_TIMEOUT,
                        account.getUuid().hashCode());
            }
        }
        long msToMucPing = (mLastMucPing + (Config.PING_MAX_INTERVAL * 2000L)) - SystemClock.elapsedRealtime();
        if (pingNow || ("ui".equals(action) && msToMucPing <= 0) || msToMucPing < -300000) {
            Log.d(Config.LOGTAG, "ping MUCs");
            mLastMucPing = SystemClock.elapsedRealtime();
            for (Conversation c : getConversations()) {
                if (c.getMode() == Conversation.MODE_MULTI && (c.getMucOptions().online() || c.getMucOptions().getError() == MucOptions.Error.SHUTDOWN)) {
                    mucSelfPingAndRejoin(c);
                }
            }
        }
        WakeLockHelper.release(wakeLock);
    }

    private void sendScheduledMessages() {
        Log.d(Config.LOGTAG, "looking for and sending scheduled messages");

        for (final var message : new ArrayList<>(mScheduledMessages.values())) {
            if (message.getTimeSent() > System.currentTimeMillis()) continue;

            final var conversation = message.getConversation();
            final var account = conversation.getAccount();
            final boolean inProgressJoin;
            synchronized (account.inProgressConferenceJoins) {
                inProgressJoin = account.inProgressConferenceJoins.contains(conversation);
            }
            final boolean pendingJoin;
            synchronized (account.pendingConferenceJoins) {
                pendingJoin = account.pendingConferenceJoins.contains(conversation);
            }
            if (conversation.getAccount() == account
                    && !pendingJoin
                    && !inProgressJoin) {
                resendMessage(message, false);
            }
        }
    }

    private void handleOrbotStartedEvent() {
        for (final Account account : accounts) {
            if (account.getStatus() == Account.State.TOR_NOT_AVAILABLE) {
                reconnectAccount(account, true, false);
            }
        }
    }

    private boolean processAccountState(
            final Account account,
            final boolean interactive,
            final boolean isUiAction,
            final boolean isAccountPushed,
            final HashSet<Account> pingCandidates) {
        if (!account.getStatus().isAttemptReconnect()) {
            return false;
        }
        final var requestCode = account.getUuid().hashCode();
        if (!hasInternetConnection()) {
            account.setStatus(Account.State.NO_INTERNET);
            statusListener.onStatusChanged(account);
        } else {
            if (account.getStatus() == Account.State.NO_INTERNET) {
                account.setStatus(Account.State.OFFLINE);
                statusListener.onStatusChanged(account);
            }
            if (account.getStatus() == Account.State.ONLINE) {
                synchronized (mLowPingTimeoutMode) {
                    long lastReceived = account.getXmppConnection().getLastPacketReceived();
                    long lastSent = account.getXmppConnection().getLastPingSent();
                    long pingInterval =
                            isUiAction
                                    ? Config.PING_MIN_INTERVAL * 1000
                                    : Config.PING_MAX_INTERVAL * 1000;
                    long msToNextPing =
                            (Math.max(lastReceived, lastSent) + pingInterval)
                                    - SystemClock.elapsedRealtime();
                    int pingTimeout =
                            mLowPingTimeoutMode.contains(account.getJid().asBareJid())
                                    ? Config.LOW_PING_TIMEOUT * 1000
                                    : Config.PING_TIMEOUT * 1000;
                    long pingTimeoutIn = (lastSent + pingTimeout) - SystemClock.elapsedRealtime();
                    if (lastSent > lastReceived) {
                        if (pingTimeoutIn < 0) {
                            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": ping timeout");
                            this.reconnectAccount(account, true, interactive);
                        } else {
                            this.scheduleWakeUpCall(pingTimeoutIn, requestCode);
                        }
                    } else {
                        pingCandidates.add(account);
                        if (isAccountPushed) {
                            if (mLowPingTimeoutMode.add(account.getJid().asBareJid())) {
                                Log.d(
                                        Config.LOGTAG,
                                        account.getJid().asBareJid()
                                                + ": entering low ping timeout mode");
                            }
                            return true;
                        } else if (msToNextPing <= 0) {
                            return true;
                        } else {
                            this.scheduleWakeUpCall(msToNextPing, requestCode);
                            if (mLowPingTimeoutMode.remove(account.getJid().asBareJid())) {
                                Log.d(
                                        Config.LOGTAG,
                                        account.getJid().asBareJid()
                                                + ": leaving low ping timeout mode");
                            }
                        }
                    }
                }
            } else if (account.getStatus() == Account.State.OFFLINE) {
                reconnectAccount(account, true, interactive);
            } else if (account.getStatus() == Account.State.CONNECTING) {
                final var connection = account.getXmppConnection();
                final var connectionDuration = connection.getConnectionDuration();
                final var discoDuration = connection.getDiscoDuration();
                final var connectionTimeout = Config.CONNECT_TIMEOUT * 1000L - connectionDuration;
                final var discoTimeout = Config.CONNECT_DISCO_TIMEOUT * 1000L - discoDuration;
                if (connectionTimeout < 0) {
                    connection.triggerConnectionTimeout();
                } else if (discoTimeout < 0) {
                    connection.sendDiscoTimeout();
                    scheduleWakeUpCall(discoTimeout, requestCode);
                } else {
                    scheduleWakeUpCall(Math.min(connectionTimeout, discoTimeout), requestCode);
                }
            } else {
                final boolean aggressive =
                        account.getStatus() == Account.State.SEE_OTHER_HOST
                                || hasJingleRtpConnection(account);
                if (account.getXmppConnection().getTimeToNextAttempt(aggressive) <= 0) {
                    reconnectAccount(account, true, interactive);
                }
            }
        }
        return false;
    }

    private void toggleSoftDisabled(final boolean softDisabled) {
        for (final Account account : this.accounts) {
            if (account.isEnabled()) {
                if (account.setOption(Account.OPTION_SOFT_DISABLED, softDisabled)) {
                    updateAccount(account);
                }
            }
        }
    }

    private void fetchServiceOutageStatus(final Account account) {
        final var sosUrl = account.getKey(Account.KEY_SOS_URL);
        if (Strings.isNullOrEmpty(sosUrl)) {
            return;
        }
        final var url = HttpUrl.parse(sosUrl);
        if (url == null) {
            return;
        }
        Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": fetching service outage " + url);
        Futures.addCallback(
                ServiceOutageStatus.fetch(getApplicationContext(), url),
                new FutureCallback<>() {
                    @Override
                    public void onSuccess(final ServiceOutageStatus sos) {
                        Log.d(Config.LOGTAG, "fetched " + sos);
                        account.setServiceOutageStatus(sos);
                        updateAccountUi();
                    }

                    @Override
                    public void onFailure(@NonNull Throwable throwable) {
                        Log.d(Config.LOGTAG, "error fetching sos", throwable);
                    }
                },
                MoreExecutors.directExecutor());
    }

    public boolean processUnifiedPushMessage(
            final Account account, final Jid transport, final Element push) {
        return unifiedPushBroker.processPushMessage(account, transport, push);
    }

    public void reinitializeMuclumbusService() {
        mChannelDiscoveryService.initializeMuclumbusService();
    }

    public void discoverChannels(
            String query,
            ChannelDiscoveryService.Method method,
            Map<Jid, Account> mucServices,
            ChannelDiscoveryService.OnChannelSearchResultsFound onChannelSearchResultsFound) {
        mChannelDiscoveryService.discover(
                Strings.nullToEmpty(query).trim(), method, mucServices, onChannelSearchResultsFound);
    }

    public boolean isDataSaverDisabled() {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
            return true;
        }
        final ConnectivityManager connectivityManager = getSystemService(ConnectivityManager.class);
        return !Compatibility.isActiveNetworkMetered(connectivityManager)
                || Compatibility.getRestrictBackgroundStatus(connectivityManager)
                        == ConnectivityManager.RESTRICT_BACKGROUND_STATUS_DISABLED;
    }

    private void directReply(final Conversation conversation, final String body, final String lastMessageUuid, final boolean dismissAfterReply) {
        final Message inReplyTo = lastMessageUuid == null ? null : conversation.findMessageWithUuid(lastMessageUuid);
        Message message = new Message(conversation, body, conversation.getNextEncryption());
        if (inReplyTo != null) {
            if (Emoticons.isEmoji(body.replaceAll("\\s", ""))) {
                final var aggregated = inReplyTo.getAggregatedReactions();
                final ImmutableSet.Builder<String> reactionBuilder = new ImmutableSet.Builder<>();
                reactionBuilder.addAll(aggregated.ourReactions);
                reactionBuilder.add(body.replaceAll("\\s", ""));
                sendReactions(inReplyTo, reactionBuilder.build());
                return;
            } else {
                message = inReplyTo.reply();
            }
            message.clearFallbacks("urn:xmpp:reply:0");
            message.setBody(body);
            message.setEncryption(conversation.getNextEncryption());
        }
        if (inReplyTo != null && inReplyTo.isPrivateMessage()) {
            Message.configurePrivateMessage(message, inReplyTo.getCounterpart());
        }
        message.markUnread();
        if (message.getEncryption() == Message.ENCRYPTION_PGP) {
            getPgpEngine()
                    .encrypt(
                            message,
                            new UiCallback<Message>() {
                                @Override
                                public void success(Message message) {
                                    if (dismissAfterReply) {
                                        markRead((Conversation) message.getConversation(), true);
                                    } else {
                                        mNotificationService.pushFromDirectReply(message);
                                    }
                                }

                                @Override
                                public void error(int errorCode, Message object) {}

                                @Override
                                public void userInputRequired(PendingIntent pi, Message object) {}
                            });
        } else {
            sendMessage(message);
            if (dismissAfterReply) {
                markRead(conversation, true);
            } else {
                mNotificationService.pushFromDirectReply(message);
            }
        }
    }

    private boolean dndOnSilentMode() {
        return getBooleanPreference(AppSettings.DND_ON_SILENT_MODE, R.bool.dnd_on_silent_mode);
    }

    private boolean manuallyChangePresence() {
        return getBooleanPreference(
                AppSettings.MANUALLY_CHANGE_PRESENCE, R.bool.manually_change_presence);
    }

    private boolean treatVibrateAsSilent() {
        return getBooleanPreference(
                AppSettings.TREAT_VIBRATE_AS_SILENT, R.bool.treat_vibrate_as_silent);
    }

    private boolean awayWhenScreenLocked() {
        return getBooleanPreference(
                AppSettings.AWAY_WHEN_SCREEN_IS_OFF, R.bool.away_when_screen_off);
    }

    private String getCompressPicturesPreference() {
        return getPreferences()
                .getString(
                        "picture_compression",
                        getResources().getString(R.string.picture_compression));
    }

    private Presence.Status getTargetPresence() {
        if (dndOnSilentMode() && isPhoneSilenced()) {
            return Presence.Status.DND;
        } else if (awayWhenScreenLocked() && isScreenLocked()) {
            return Presence.Status.AWAY;
        } else {
            return Presence.Status.ONLINE;
        }
    }

    public boolean isScreenLocked() {
        final KeyguardManager keyguardManager = getSystemService(KeyguardManager.class);
        final PowerManager powerManager = getSystemService(PowerManager.class);
        final boolean locked = keyguardManager != null && keyguardManager.isKeyguardLocked();
        final boolean interactive;
        try {
            interactive = powerManager != null && powerManager.isInteractive();
        } catch (final Exception e) {
            return false;
        }
        return locked || !interactive;
    }

    private boolean isPhoneSilenced() {
        final NotificationManager notificationManager = getSystemService(NotificationManager.class);
        final int filter =
                notificationManager == null
                        ? NotificationManager.INTERRUPTION_FILTER_UNKNOWN
                        : notificationManager.getCurrentInterruptionFilter();
        final boolean notificationDnd = filter >= NotificationManager.INTERRUPTION_FILTER_PRIORITY;
        final AudioManager audioManager = getSystemService(AudioManager.class);
        final int ringerMode =
                audioManager == null
                        ? AudioManager.RINGER_MODE_NORMAL
                        : audioManager.getRingerMode();
        try {
            if (treatVibrateAsSilent()) {
                return notificationDnd || ringerMode != AudioManager.RINGER_MODE_NORMAL;
            } else {
                return notificationDnd || ringerMode == AudioManager.RINGER_MODE_SILENT;
            }
        } catch (final Throwable throwable) {
            Log.d(
                    Config.LOGTAG,
                    "platform bug in isPhoneSilenced (" + throwable.getMessage() + ")");
            return notificationDnd;
        }
    }

    private void resetAllAttemptCounts(boolean reallyAll, boolean retryImmediately) {
        Log.d(Config.LOGTAG, "resetting all attempt counts");
        for (Account account : accounts) {
            if (account.hasErrorStatus() || reallyAll) {
                final XmppConnection connection = account.getXmppConnection();
                if (connection != null) {
                    connection.resetAttemptCount(retryImmediately);
                }
            }
            if (account.setShowErrorNotification(true)) {
                mDatabaseWriterExecutor.execute(() -> databaseBackend.updateAccount(account));
            }
        }
        mNotificationService.updateErrorNotification();
    }

    private void dismissErrorNotifications() {
        for (final Account account : this.accounts) {
            if (account.hasErrorStatus()) {
                Log.d(
                        Config.LOGTAG,
                        account.getJid().asBareJid() + ": dismissing error notification");
                if (account.setShowErrorNotification(false)) {
                    mDatabaseWriterExecutor.execute(() -> databaseBackend.updateAccount(account));
                }
            }
        }
    }

    private void expireOldMessages() {
        expireOldMessages(false);
    }

    public void expireOldMessages(final boolean resetHasMessagesLeftOnServer) {
        mLastExpiryRun.set(SystemClock.elapsedRealtime());
        mDatabaseWriterExecutor.execute(
                () -> {
                    long timestamp = getAutomaticMessageDeletionDate();
                    if (timestamp > 0) {
                        databaseBackend.expireOldMessages(timestamp);
                        synchronized (XmppConnectionService.this.conversations) {
                            for (Conversation conversation :
                                    XmppConnectionService.this.conversations) {
                                conversation.expireOldMessages(timestamp);
                                if (resetHasMessagesLeftOnServer) {
                                    conversation.messagesLoaded.set(true);
                                    conversation.setHasMessagesLeftOnServer(true);
                                }
                            }
                        }
                        updateConversationUi();
                    }
                });
    }

    public boolean hasInternetConnection() {
        final ConnectivityManager cm =
                ContextCompat.getSystemService(this, ConnectivityManager.class);
        if (cm == null) {
            return true; // if internet connection can not be checked it is probably best to just
            // try
        }
        try {
            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.Q) {
                final Network activeNetwork = cm.getActiveNetwork();
                final NetworkCapabilities capabilities =
                        activeNetwork == null ? null : cm.getNetworkCapabilities(activeNetwork);
                return capabilities != null
                        && capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
            } else {
                final NetworkInfo networkInfo = cm.getActiveNetworkInfo();
                return networkInfo != null
                        && (networkInfo.isConnected()
                                || networkInfo.getType() == ConnectivityManager.TYPE_ETHERNET);
            }
        } catch (final RuntimeException e) {
            Log.d(Config.LOGTAG, "unable to check for internet connection", e);
            return true; // if internet connection can not be checked it is probably best to just
            // try
        }
    }

    @SuppressLint("TrulyRandom")
    @Override
    public void onCreate() {
        com.cheogram.android.AndroidLoggingHandler.reset(new com.cheogram.android.AndroidLoggingHandler());
        java.util.logging.Logger.getLogger("").setLevel(java.util.logging.Level.FINEST);
        LibIdnXmppStringprep.setup();
        emojiSearch = new EmojiSearch(this);
        setTheme(R.style.Theme_Conversations3);
        ThemeHelper.applyCustomColors(this);
        if (Compatibility.runsTwentySix()) {
            mNotificationService.initializeChannels();
        }
        mChannelDiscoveryService.initializeMuclumbusService();
        mForceDuringOnCreate.set(Compatibility.runsAndTargetsTwentySix(this));
        toggleForegroundService();
        this.destroyed = false;
        OmemoSetting.load(this);
        try {
            Security.insertProviderAt(Conscrypt.newProvider(), 1);
        } catch (Throwable throwable) {
            Log.e(Config.LOGTAG, "unable to initialize security provider", throwable);
        }
        Resolver.init(this);
        updateMemorizingTrustManager();
        final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
        final int cacheSize = maxMemory / 8;
        this.mDrawableCache = new LruCache<String, Drawable>(cacheSize) {
            @Override
            protected int sizeOf(final String key, final Drawable drawable) {
                if (drawable instanceof BitmapDrawable) {
                    Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
                    if (bitmap == null) return 1024;

                    return bitmap.getByteCount() / 1024;
                } else if (drawable instanceof AvatarService.TextDrawable) {
                    return 50;
                } else {
                    return drawable.getIntrinsicWidth() * drawable.getIntrinsicHeight() * 40 / 1024;
                }
            }
        };
        if (mLastActivity == 0) {
            mLastActivity =
                    getPreferences().getLong(SETTING_LAST_ACTIVITY_TS, System.currentTimeMillis());
        }

        Log.d(Config.LOGTAG, "initializing database...");
        this.databaseBackend = DatabaseBackend.getInstance(getApplicationContext());
        Log.d(Config.LOGTAG, "restoring accounts...");
        this.accounts = databaseBackend.getAccounts();
        for (Account account : this.accounts) {
            final int color = getPreferences().getInt("account_color:" + account.getUuid(), 0);
            if (color != 0) account.setColor(color);
        }
        final SharedPreferences.Editor editor = getPreferences().edit();
        final boolean hasEnabledAccounts = hasEnabledAccounts();
        editor.putBoolean(SystemEventReceiver.SETTING_ENABLED_ACCOUNTS, hasEnabledAccounts).apply();
        editor.apply();
        toggleSetProfilePictureActivity(hasEnabledAccounts);
        reconfigurePushDistributor();

        if (CallIntegration.hasSystemFeature(this)) {
            CallIntegrationConnectionService.togglePhoneAccountsAsync(this, this.accounts);
        }

        restoreFromDatabase();

        if (QuickConversationsService.isContactListIntegration(this)
                && ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS)
                        == PackageManager.PERMISSION_GRANTED) {
            startContactObserver();
        }
        FILE_OBSERVER_EXECUTOR.execute(fileBackend::deleteHistoricAvatarPath);
        if (Compatibility.hasStoragePermission(this)) {
            Log.d(Config.LOGTAG, "starting file observer");
            FILE_OBSERVER_EXECUTOR.execute(this.fileObserver::startWatching);
            FILE_OBSERVER_EXECUTOR.execute(this::checkForDeletedFiles);
        }
        if (Config.supportOpenPgp()) {
            this.pgpServiceConnection =
                    new OpenPgpServiceConnection(
                            this,
                            "org.sufficientlysecure.keychain",
                            new OpenPgpServiceConnection.OnBound() {
                                @Override
                                public void onBound(final IOpenPgpService2 service) {
                                    for (Account account : accounts) {
                                        final PgpDecryptionService pgp =
                                                account.getPgpDecryptionService();
                                        if (pgp != null) {
                                            pgp.continueDecryption(true);
                                        }
                                    }
                                }

                                @Override
                                public void onError(final Exception exception) {
                                    Log.e(
                                            Config.LOGTAG,
                                            "could not bind to OpenKeyChain",
                                            exception);
                                }
                            });
            this.pgpServiceConnection.bindToService();
        }

        final PowerManager powerManager = getSystemService(PowerManager.class);
        if (powerManager != null) {
            this.wakeLock =
                    powerManager.newWakeLock(
                            PowerManager.PARTIAL_WAKE_LOCK, "Conversations:Service");
        }

        toggleForegroundService();
        updateUnreadCountBadge();
        toggleScreenEventReceiver();
        final IntentFilter systemBroadcastFilter = new IntentFilter();
        scheduleNextIdlePing();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            systemBroadcastFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
        }
        systemBroadcastFilter.addAction(NotificationManager.ACTION_INTERRUPTION_FILTER_CHANGED);
        ContextCompat.registerReceiver(
                this,
                this.mInternalEventReceiver,
                systemBroadcastFilter,
                ContextCompat.RECEIVER_NOT_EXPORTED);
        final IntentFilter exportedBroadcastFilter = new IntentFilter();
        exportedBroadcastFilter.addAction(TorServiceUtils.ACTION_STATUS);
        ContextCompat.registerReceiver(
                this,
                this.mInternalRestrictedEventReceiver,
                exportedBroadcastFilter,
                ContextCompat.RECEIVER_EXPORTED);
        mForceDuringOnCreate.set(false);
        toggleForegroundService();
        rescanStickers();
        cleanupCache();
        internalPingExecutor.scheduleWithFixedDelay(
                this::manageAccountConnectionStatesInternal, 10, 10, TimeUnit.SECONDS);
        final SharedPreferences sharedPreferences =
                androidx.preference.PreferenceManager.getDefaultSharedPreferences(this);
        sharedPreferences.registerOnSharedPreferenceChangeListener(
                new SharedPreferences.OnSharedPreferenceChangeListener() {
                    @Override
                    public void onSharedPreferenceChanged(
                            SharedPreferences sharedPreferences, @Nullable String key) {
                        Log.d(Config.LOGTAG, "preference '" + key + "' has changed");
                        if (AppSettings.KEEP_FOREGROUND_SERVICE.equals(key)) {
                            toggleForegroundService();
                        }
                    }
                });
    }

    private void checkForDeletedFiles() {
        if (destroyed) {
            Log.d(
                    Config.LOGTAG,
                    "Do not check for deleted files because service has been destroyed");
            return;
        }
        final long start = SystemClock.elapsedRealtime();
        final List<DatabaseBackend.FilePathInfo> relativeFilePaths =
                databaseBackend.getFilePathInfo();
        final List<DatabaseBackend.FilePathInfo> changed = new ArrayList<>();
        for (final DatabaseBackend.FilePathInfo filePath : relativeFilePaths) {
            if (destroyed) {
                Log.d(
                        Config.LOGTAG,
                        "Stop checking for deleted files because service has been destroyed");
                return;
            }
            final File file = fileBackend.getFileForPath(filePath.path);
            if (filePath.setDeleted(!file.exists())) {
                changed.add(filePath);
            }
        }
        final long duration = SystemClock.elapsedRealtime() - start;
        Log.d(
                Config.LOGTAG,
                "found "
                        + changed.size()
                        + " changed files on start up. total="
                        + relativeFilePaths.size()
                        + ". ("
                        + duration
                        + "ms)");
        if (changed.size() > 0) {
            databaseBackend.markFilesAsChanged(changed);
            markChangedFiles(changed);
        }
    }

    public void startContactObserver() {
        getContentResolver()
                .registerContentObserver(
                        ContactsContract.Contacts.CONTENT_URI,
                        true,
                        new ContentObserver(null) {
                            @Override
                            public void onChange(boolean selfChange) {
                                super.onChange(selfChange);
                                if (restoredFromDatabaseLatch.getCount() == 0) {
                                    loadPhoneContacts();
                                }
                            }
                        });
    }

    @Override
    public void onTrimMemory(int level) {
        super.onTrimMemory(level);
        if (level >= TRIM_MEMORY_COMPLETE) {
            Log.d(Config.LOGTAG, "clear cache due to low memory");
            getDrawableCache().evictAll();
        }
    }

    @Override
    public void onDestroy() {
        try {
            unregisterReceiver(this.mInternalEventReceiver);
            unregisterReceiver(this.mInternalRestrictedEventReceiver);
            unregisterReceiver(this.mInternalScreenEventReceiver);
        } catch (final IllegalArgumentException e) {
            // ignored
        }
        destroyed = false;
        fileObserver.stopWatching();
        internalPingExecutor.shutdown();
        super.onDestroy();
    }

    public void restartFileObserver() {
        Log.d(Config.LOGTAG, "restarting file observer");
        FILE_OBSERVER_EXECUTOR.execute(this.fileObserver::restartWatching);
        FILE_OBSERVER_EXECUTOR.execute(this::checkForDeletedFiles);
    }

    public void toggleScreenEventReceiver() {
        if (awayWhenScreenLocked() && !manuallyChangePresence()) {
            final IntentFilter filter = new IntentFilter();
            filter.addAction(Intent.ACTION_SCREEN_ON);
            filter.addAction(Intent.ACTION_SCREEN_OFF);
            filter.addAction(Intent.ACTION_USER_PRESENT);
            registerReceiver(this.mInternalScreenEventReceiver, filter);
        } else {
            try {
                unregisterReceiver(this.mInternalScreenEventReceiver);
            } catch (IllegalArgumentException e) {
                // ignored
            }
        }
    }

    public void toggleForegroundService() {
        toggleForegroundService(false, false);
    }

    public void setOngoingCall(
            AbstractJingleConnection.Id id, Set<Media> media, final boolean reconnecting) {
        ongoingCall.set(new OngoingCall(id, media, reconnecting));
        toggleForegroundService(false, true);
    }

    public void removeOngoingCall() {
        ongoingCall.set(null);
        toggleForegroundService(false, false);
    }

    private void toggleForegroundService(boolean force, boolean needMic) {
        final boolean status;
        final OngoingCall ongoing = ongoingCall.get();
        final boolean ongoingVideoTranscoding = mOngoingVideoTranscoding.get();
        final int id;
        if (force
                || mForceDuringOnCreate.get()
                || ongoingVideoTranscoding
                || ongoing != null
                || (Compatibility.keepForegroundService(this) && hasEnabledAccounts())) {
            if (Compatibility.runsTwentySix()) {
                mNotificationService.initializeChannels();
            }
            final Notification notification;
            if (ongoing != null && !diallerIntegrationActive.get()) {
                notification = this.mNotificationService.getOngoingCallNotification(ongoing);
                id = NotificationService.ONGOING_CALL_NOTIFICATION_ID;
                startForegroundOrCatch(id, notification, true);
            } else if (ongoingVideoTranscoding) {
                notification = this.mNotificationService.getIndeterminateVideoTranscoding();
                id = NotificationService.ONGOING_VIDEO_TRANSCODING_NOTIFICATION_ID;
                startForegroundOrCatch(id, notification, false);
            } else {
                notification = this.mNotificationService.createForegroundNotification();
                id = NotificationService.FOREGROUND_NOTIFICATION_ID;
                startForegroundOrCatch(id, notification, needMic || ongoing != null || diallerIntegrationActive.get());
            }
            mNotificationService.notify(id, notification);
            status = true;
        } else {
            id = 0;
            stopForeground(true);
            status = false;
        }

        for (final int toBeRemoved :
                Collections2.filter(
                        Arrays.asList(
                                NotificationService.FOREGROUND_NOTIFICATION_ID,
                                NotificationService.ONGOING_CALL_NOTIFICATION_ID,
                                NotificationService.ONGOING_VIDEO_TRANSCODING_NOTIFICATION_ID),
                        i -> i != id)) {
            mNotificationService.cancel(toBeRemoved);
        }
        Log.d(
                Config.LOGTAG,
                "ForegroundService: " + (status ? "on" : "off") + ", notification: " + id);
    }

    private void startForegroundOrCatch(
            final int id, final Notification notification, final boolean requireMicrophone) {
        try {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
                final int foregroundServiceType;
                if (requireMicrophone
                        && ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO)
                                == PackageManager.PERMISSION_GRANTED) {
                    foregroundServiceType = ServiceInfo.FOREGROUND_SERVICE_TYPE_MICROPHONE;
                    Log.d(Config.LOGTAG, "defaulting to microphone foreground service type");
                } else if (getSystemService(PowerManager.class)
                        .isIgnoringBatteryOptimizations(getPackageName())) {
                    foregroundServiceType = ServiceInfo.FOREGROUND_SERVICE_TYPE_SYSTEM_EXEMPTED;
                } else if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO)
                        == PackageManager.PERMISSION_GRANTED) {
                    foregroundServiceType = ServiceInfo.FOREGROUND_SERVICE_TYPE_MICROPHONE;
                } else if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
                        == PackageManager.PERMISSION_GRANTED) {
                    foregroundServiceType = ServiceInfo.FOREGROUND_SERVICE_TYPE_CAMERA;
                } else {
                    foregroundServiceType = ServiceInfo.FOREGROUND_SERVICE_TYPE_SPECIAL_USE;
                    Log.w(Config.LOGTAG, "falling back to special use foreground service type");
                }

                startForeground(id, notification, foregroundServiceType);
            } else {
                startForeground(id, notification);
            }
        } catch (final IllegalStateException | SecurityException e) {
            Log.e(Config.LOGTAG, "Could not start foreground service", e);
        }
    }

    public boolean foregroundNotificationNeedsUpdatingWhenErrorStateChanges() {
        return !mOngoingVideoTranscoding.get()
                && ongoingCall.get() == null
                && Compatibility.keepForegroundService(this)
                && hasEnabledAccounts();
    }

    @Override
    public void onTaskRemoved(final Intent rootIntent) {
        super.onTaskRemoved(rootIntent);
        if ((Compatibility.keepForegroundService(this) && hasEnabledAccounts())
                || mOngoingVideoTranscoding.get()
                || ongoingCall.get() != null) {
            Log.d(Config.LOGTAG, "ignoring onTaskRemoved because foreground service is activated");
        } else {
            this.logoutAndSave(false);
        }
    }

    private void logoutAndSave(boolean stop) {
        int activeAccounts = 0;
        for (final Account account : accounts) {
            if (account.isConnectionEnabled()) {
                databaseBackend.writeRoster(account.getRoster());
                activeAccounts++;
            }
            if (account.getXmppConnection() != null) {
                new Thread(() -> disconnect(account, false)).start();
            }
        }
        if (stop || activeAccounts == 0) {
            Log.d(Config.LOGTAG, "good bye");
            stopSelf();
        }
    }

    private void schedulePostConnectivityChange() {
        final AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        if (alarmManager == null) {
            return;
        }
        final long triggerAtMillis =
                SystemClock.elapsedRealtime()
                        + (Config.POST_CONNECTIVITY_CHANGE_PING_INTERVAL * 1000);
        final Intent intent = new Intent(this, SystemEventReceiver.class);
        intent.setAction(ACTION_POST_CONNECTIVITY_CHANGE);
        try {
            final PendingIntent pendingIntent =
                    PendingIntent.getBroadcast(
                            this,
                            1,
                            intent,
                            s()
                                    ? PendingIntent.FLAG_IMMUTABLE
                                            | PendingIntent.FLAG_UPDATE_CURRENT
                                    : PendingIntent.FLAG_UPDATE_CURRENT);
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                alarmManager.setAndAllowWhileIdle(
                        AlarmManager.ELAPSED_REALTIME_WAKEUP, triggerAtMillis, pendingIntent);
            } else {
                alarmManager.set(
                        AlarmManager.ELAPSED_REALTIME_WAKEUP, triggerAtMillis, pendingIntent);
            }
        } catch (RuntimeException e) {
            Log.e(Config.LOGTAG, "unable to schedule alarm for post connectivity change", e);
        }
    }

    public void scheduleWakeUpCall(final int seconds, final int requestCode) {
        scheduleWakeUpCall((seconds < 0 ? 1 : seconds + 1) * 1000L, requestCode);
    }

    public void scheduleWakeUpCall(final long milliSeconds, final int requestCode) {
        final var timeToWake = SystemClock.elapsedRealtime() + milliSeconds;
        final var alarmManager = getSystemService(AlarmManager.class);
        final Intent intent = new Intent(this, SystemEventReceiver.class);
        intent.setAction(ACTION_PING);
        try {
            final PendingIntent pendingIntent =
                    PendingIntent.getBroadcast(
                            this, requestCode, intent, PendingIntent.FLAG_IMMUTABLE);
            alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake, pendingIntent);
        } catch (final RuntimeException e) {
            Log.e(Config.LOGTAG, "unable to schedule alarm for ping", e);
        }
    }

    private void scheduleNextIdlePing() {
        long timeUntilWake = Config.IDLE_PING_INTERVAL * 1000;
        final var now = System.currentTimeMillis();
        for (final var message : mScheduledMessages.values()) {
            if (message.getTimeSent() <= now) continue; // Just in case
            if (message.getTimeSent() - now < timeUntilWake) timeUntilWake = message.getTimeSent() - now;
        }
        final var timeToWake = SystemClock.elapsedRealtime() + timeUntilWake;
        final AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        if (alarmManager == null) {
            Log.d(Config.LOGTAG, "no alarm manager?");
            return;
        }
        final Intent intent = new Intent(this, SystemEventReceiver.class);
        intent.setAction(ACTION_IDLE_PING);
        try {
            final PendingIntent pendingIntent =
                    PendingIntent.getBroadcast(
                            this,
                            0,
                            intent,
                            s()
                                    ? PendingIntent.FLAG_IMMUTABLE
                                            | PendingIntent.FLAG_UPDATE_CURRENT
                                    : PendingIntent.FLAG_UPDATE_CURRENT);
            alarmManager.setAndAllowWhileIdle(
                    AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake, pendingIntent);
        } catch (RuntimeException e) {
            Log.d(Config.LOGTAG, "unable to schedule alarm for idle ping", e);
        }
    }

    public XmppConnection createConnection(final Account account) {
        final XmppConnection connection = new XmppConnection(account, this);
        connection.setOnStatusChangedListener(this.statusListener);
        connection.setOnJinglePacketReceivedListener((mJingleConnectionManager::deliverPacket));
        connection.setOnMessageAcknowledgeListener(this.mOnMessageAcknowledgedListener);
        connection.addOnAdvancedStreamFeaturesAvailableListener(this.mMessageArchiveService);
        connection.addOnAdvancedStreamFeaturesAvailableListener(this.mAvatarService);
        AxolotlService axolotlService = account.getAxolotlService();
        if (axolotlService != null) {
            connection.addOnAdvancedStreamFeaturesAvailableListener(axolotlService);
        }
        return connection;
    }

    public void sendChatState(Conversation conversation) {
        if (sendChatStates()) {
            final var packet = mMessageGenerator.generateChatState(conversation);
            sendMessagePacket(conversation.getAccount(), packet);
        }
    }

    private void sendFileMessage(
            final Message message, final boolean delay, final boolean forceP2P, final Runnable cb) {
        final var account = message.getConversation().getAccount();
        Log.d(
                Config.LOGTAG,
                account.getJid().asBareJid() + ": send file message. forceP2P=" + forceP2P);
        if ((account.httpUploadAvailable(fileBackend.getFile(message, false).getSize())
                        || message.getConversation().getMode() == Conversation.MODE_MULTI)
                && !forceP2P) {
            mHttpConnectionManager.createNewUploadConnection(message, delay, cb);
        } else {
            mJingleConnectionManager.startJingleFileTransfer(message);
            if (cb != null) cb.run();
        }
    }

    public void sendMessage(final Message message) {
        sendMessage(message, false, false, false, false, null);
    }

    public void sendMessage(final Message message, final Runnable cb) {
        sendMessage(message, false, false, false, false, cb);
    }

    private void sendMessage(final Message message, final boolean resend, final boolean previewedLinks, final boolean delay, final Runnable cb) {
        sendMessage(message, resend, previewedLinks, delay, false, cb);
    }

    private void sendMessage(
            final Message message,
            final boolean resend,
            final boolean previewedLinks,
            final boolean delay,
            final boolean forceP2P,
            final Runnable cb) {
        final Account account = message.getConversation().getAccount();
        if (account.setShowErrorNotification(true)) {
            databaseBackend.updateAccount(account);
            mNotificationService.updateErrorNotification();
        }
        final Conversation conversation = (Conversation) message.getConversation();
        account.deactivateGracePeriod();

        if (QuickConversationsService.isQuicksy()
                && conversation.getMode() == Conversation.MODE_SINGLE) {
            final Contact contact = conversation.getContact();
            if (!contact.showInRoster() && contact.getOption(Contact.Options.SYNCED_VIA_OTHER)) {
                Log.d(
                        Config.LOGTAG,
                        account.getJid().asBareJid()
                                + ": adding "
                                + contact.getJid()
                                + " on sending message");
                createContact(contact, true);
            }
        }

        im.conversations.android.xmpp.model.stanza.Message packet = null;
        final boolean addToConversation = !message.edited() && message.getRawBody() != null;
        boolean saveInDb = addToConversation;
        message.setStatus(Message.STATUS_WAITING);

        if (message.getEncryption() != Message.ENCRYPTION_NONE
                && conversation.getMode() == Conversation.MODE_MULTI
                && conversation.isPrivateAndNonAnonymous()) {
            if (conversation.setAttribute(
                    Conversation.ATTRIBUTE_FORMERLY_PRIVATE_NON_ANONYMOUS, true)) {
                databaseBackend.updateConversation(conversation);
            }
        }

        final boolean inProgressJoin = isJoinInProgress(conversation);

        if (message.getCounterpart() == null && !message.isPrivateMessage()) {
            message.setCounterpart(message.getConversation().getJid().asBareJid());
        }

        boolean waitForPreview = false;
        if (getPreferences().getBoolean("send_link_previews", true) && !previewedLinks && !message.needsUploading() && message.getEncryption() != Message.ENCRYPTION_AXOLOTL) {
            message.clearLinkDescriptions();
            final List<URI> links = message.getLinks();
            if (!links.isEmpty()) {
                waitForPreview = true;
                if (account.isOnlineAndConnected()) {
                    FILE_ATTACHMENT_EXECUTOR.execute(() -> {
                        for (URI link : links) {
                            if ("https".equals(link.getScheme())) {
                                try {
                                    HttpUrl url = HttpUrl.parse(link.toString());
                                    OkHttpClient http = getHttpConnectionManager().buildHttpClient(url, account, 5, false);
                                    final var request = new okhttp3.Request.Builder().url(url).head().build();
                                    okhttp3.Response response = null;
                                    if ("www.amazon.com".equals(link.getHost()) || "www.amazon.ca".equals(link.getHost())) {
                                        // Amazon blocks HEAD
                                        response = new okhttp3.Response.Builder().request(request).protocol(okhttp3.Protocol.HTTP_1_1).code(200).message("OK").addHeader("Content-Type", "text/html").build();
                                    } else {
                                        response = http.newCall(request).execute();
                                    }
                                    final String mimeType = response.header("Content-Type") == null ? "" : response.header("Content-Type");
                                    final boolean image = mimeType.startsWith("image/");
                                    final boolean audio = mimeType.startsWith("audio/");
                                    final boolean video = mimeType.startsWith("video/");
                                    final boolean pdf = mimeType.equals("application/pdf");
                                    final boolean html = mimeType.startsWith("text/html") || mimeType.startsWith("application/xhtml+xml");
                                    if (response.isSuccessful() && (image || audio || video || pdf)) {
                                        Message.FileParams params = message.getFileParams();
                                        params.url = url.toString();
                                        if (response.header("Content-Length") != null) params.size = Long.parseLong(response.header("Content-Length"), 10);
                                        if (!Message.configurePrivateFileMessage(message)) {
                                            message.setType(image ? Message.TYPE_IMAGE : Message.TYPE_FILE);
                                        }
                                        params.setName(HttpConnectionManager.extractFilenameFromResponse(response));

                                        if (link.toString().equals(message.getRawBody())) {
                                            Element fallback = new Element("fallback", "urn:xmpp:fallback:0").setAttribute("for", Namespace.OOB);
                                            fallback.addChild("body", "urn:xmpp:fallback:0");
                                            message.addPayload(fallback);
                                        } else if (message.getRawBody().indexOf(link.toString()) >= 0) {
                                            // Part of the real body, not just a fallback
                                            Element fallback = new Element("fallback", "urn:xmpp:fallback:0").setAttribute("for", Namespace.OOB);
                                            fallback.addChild("body", "urn:xmpp:fallback:0")
                                                .setAttribute("start", "0")
                                                .setAttribute("end", "0");
                                            message.addPayload(fallback);
                                        }

                                        final int encryption = message.getEncryption();
                                        getHttpConnectionManager().createNewDownloadConnection(message, false, (file) -> {
                                            message.setEncryption(encryption);
                                            synchronized (message.getConversation()) {
                                                if (message.getStatus() == Message.STATUS_WAITING) sendMessage(message, true, true, false, cb);
                                            }
                                        });
                                        return;
                                    } else if (response.isSuccessful() && html) {
                                        Semaphore waiter = new Semaphore(0);
                                        OpenGraphParser.Builder openGraphBuilder = new OpenGraphParser.Builder(new OpenGraphCallback() {
                                            @Override
                                            public void onPostResponse(OpenGraphResult result) {
                                                Element rdf = new Element("Description", "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
                                                rdf.setAttribute("xmlns:rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
                                                rdf.setAttribute("rdf:about", link.toString());
                                                if (result.getTitle() != null && !"".equals(result.getTitle())) {
                                                    rdf.addChild("title", "https://ogp.me/ns#").setContent(result.getTitle());
                                                }
                                                if (result.getDescription() != null && !"".equals(result.getDescription())) {
                                                    rdf.addChild("description", "https://ogp.me/ns#").setContent(result.getDescription());
                                                }
                                                if (result.getUrl() != null) {
                                                    rdf.addChild("url", "https://ogp.me/ns#").setContent(result.getUrl());
                                                }
                                                if (result.getImage() != null) {
                                                    rdf.addChild("image", "https://ogp.me/ns#").setContent(result.getImage());
                                                }
                                                if (result.getType() != null) {
                                                    rdf.addChild("type", "https://ogp.me/ns#").setContent(result.getType());
                                                }
                                                if (result.getSiteName() != null) {
                                                    rdf.addChild("site_name", "https://ogp.me/ns#").setContent(result.getSiteName());
                                                }
                                                if (result.getVideo() != null) {
                                                    rdf.addChild("video", "https://ogp.me/ns#").setContent(result.getVideo());
                                                }
                                                message.addPayload(rdf);
                                                waiter.release();
                                            }

                                            public void onError(String error) {
                                                waiter.release();
                                            }
                                        })
                                            .showNullOnEmpty(true)
                                            .maxBodySize(90000)
                                            .timeout(5000);
                                        if (useTorToConnect()) {
                                            openGraphBuilder = openGraphBuilder.jsoupProxy(new JsoupProxy("127.0.0.1", 8118));
                                        }
                                        openGraphBuilder.build().parse(link.toString());
                                        waiter.tryAcquire(10L, TimeUnit.SECONDS);
                                    }
                                } catch (final IOException | InterruptedException e) {  }
                            }
                        }
                        synchronized (message.getConversation()) {
                            if (message.getStatus() == Message.STATUS_WAITING) sendMessage(message, true, true, false, cb);
                        }
                    });
                }
            }
        }

        boolean passedCbOn = false;
        if (account.isOnlineAndConnected() && !inProgressJoin && !waitForPreview && message.getTimeSent() <= System.currentTimeMillis()) {
            switch (message.getEncryption()) {
                case Message.ENCRYPTION_NONE:
                    if (message.needsUploading()) {
                        if (account.httpUploadAvailable(
                                        fileBackend.getFile(message, false).getSize())
                                || conversation.getMode() == Conversation.MODE_MULTI
                                || message.fixCounterpart()) {
                            this.sendFileMessage(message, delay, forceP2P, cb);
                            passedCbOn = true;
                        } else {
                            break;
                        }
                    } else {
                        packet = mMessageGenerator.generateChat(message);
                    }
                    break;
                case Message.ENCRYPTION_PGP:
                case Message.ENCRYPTION_DECRYPTED:
                    if (message.needsUploading()) {
                        if (account.httpUploadAvailable(
                                        fileBackend.getFile(message, false).getSize())
                                || conversation.getMode() == Conversation.MODE_MULTI
                                || message.fixCounterpart()) {
                            this.sendFileMessage(message, delay, forceP2P, cb);
                            passedCbOn = true;
                        } else {
                            break;
                        }
                    } else {
                        packet = mMessageGenerator.generatePgpChat(message);
                    }
                    break;
                case Message.ENCRYPTION_AXOLOTL:
                    message.setFingerprint(account.getAxolotlService().getOwnFingerprint());
                    if (message.needsUploading()) {
                        if (account.httpUploadAvailable(
                                        fileBackend.getFile(message, false).getSize())
                                || conversation.getMode() == Conversation.MODE_MULTI
                                || message.fixCounterpart()) {
                            this.sendFileMessage(message, delay, forceP2P, cb);
                            passedCbOn = true;
                        } else {
                            break;
                        }
                    } else {
                        XmppAxolotlMessage axolotlMessage =
                                account.getAxolotlService().fetchAxolotlMessageFromCache(message);
                        if (axolotlMessage == null) {
                            account.getAxolotlService().preparePayloadMessage(message, delay);
                        } else {
                            packet = mMessageGenerator.generateAxolotlChat(message, axolotlMessage);
                        }
                    }
                    break;
            }
            if (packet != null) {
                if (account.getXmppConnection().getFeatures().sm()
                        || (conversation.getMode() == Conversation.MODE_MULTI
                                && message.getCounterpart().isBareJid())) {
                    message.setStatus(Message.STATUS_UNSEND);
                } else {
                    message.setStatus(Message.STATUS_SEND);
                }
            }
        } else {
            switch (message.getEncryption()) {
                case Message.ENCRYPTION_DECRYPTED:
                    if (!message.needsUploading()) {
                        String pgpBody = message.getEncryptedBody();
                        String decryptedBody = message.getBody();
                        message.setBody(pgpBody); // TODO might throw NPE
                        message.setEncryption(Message.ENCRYPTION_PGP);
                        if (message.edited()) {
                            message.setBody(decryptedBody);
                            message.setEncryption(Message.ENCRYPTION_DECRYPTED);
                            if (!databaseBackend.updateMessage(message, message.getEditedId())) {
                                Log.e(Config.LOGTAG, "error updated message in DB after edit");
                            }
                            updateConversationUi();
                            if (!waitForPreview && cb != null) cb.run();
                            return;
                        } else {
                            databaseBackend.createMessage(message);
                            saveInDb = false;
                            message.setBody(decryptedBody);
                            message.setEncryption(Message.ENCRYPTION_DECRYPTED);
                        }
                    }
                    break;
                case Message.ENCRYPTION_AXOLOTL:
                    message.setFingerprint(account.getAxolotlService().getOwnFingerprint());
                    break;
            }
        }

        synchronized (mScheduledMessages) {
            if (message.getTimeSent() > System.currentTimeMillis()) {
                mScheduledMessages.put(message.getUuid(), message);
                scheduleNextIdlePing();
            } else {
                mScheduledMessages.remove(message.getUuid());
            }
        }

        boolean mucMessage =
                conversation.getMode() == Conversation.MODE_MULTI && !message.isPrivateMessage();
        if (mucMessage) {
            message.setCounterpart(conversation.getMucOptions().getSelf().getFullJid());
        }

        if (resend) {
            if (packet != null && addToConversation) {
                if (account.getXmppConnection().getFeatures().sm() || mucMessage) {
                    markMessage(message, Message.STATUS_UNSEND);
                } else {
                    markMessage(message, Message.STATUS_SEND);
                }
            }
        } else {
            if (addToConversation) {
                conversation.add(message);
            }
            if (saveInDb) {
                databaseBackend.createMessage(message);
            } else if (message.edited()) {
                if (!databaseBackend.updateMessage(message, message.getEditedId())) {
                    Log.e(Config.LOGTAG, "error updated message in DB after edit");
                }
            }
            updateConversationUi();
        }
        if (packet != null) {
            if (delay) {
                mMessageGenerator.addDelay(packet, message.getTimeSent());
            }
            if (conversation.setOutgoingChatState(Config.DEFAULT_CHAT_STATE)) {
                if (this.sendChatStates()) {
                    packet.addChild(ChatState.toElement(conversation.getOutgoingChatState()));
                }
            }
            sendMessagePacket(account, packet);
            if (message.getConversation().getMode() == Conversation.MODE_MULTI && message.hasCustomEmoji()) {
                if (message.getConversation() instanceof Conversation) presenceToMuc((Conversation) message.getConversation());
            }
        }
        if (!waitForPreview && !passedCbOn && cb != null) cb.run();
    }

    private boolean isJoinInProgress(final Conversation conversation) {
        final Account account = conversation.getAccount();
        synchronized (account.inProgressConferenceJoins) {
            if (conversation.getMode() == Conversational.MODE_MULTI) {
                final boolean inProgress = account.inProgressConferenceJoins.contains(conversation);
                final boolean pending = account.pendingConferenceJoins.contains(conversation);
                final boolean inProgressJoin = inProgress || pending;
                if (inProgressJoin) {
                    Log.d(
                            Config.LOGTAG,
                            account.getJid().asBareJid()
                                    + ": holding back message to group. inProgress="
                                    + inProgress
                                    + ", pending="
                                    + pending);
                }
                return inProgressJoin;
            } else {
                return false;
            }
        }
    }

    private void sendUnsentMessages(final Conversation conversation) {
        synchronized (conversation) {
            conversation.findWaitingMessages(message -> resendMessage(message, true));
        }
    }

    public void resendMessage(final Message message, final boolean delay) {
        sendMessage(message, true, false, delay, false, null);
    }

    public void resendMessage(final Message message, final boolean delay, final Runnable cb) {
        sendMessage(message, true, false, delay, false, cb);
    }

    public void resendMessage(final Message message, final boolean delay, final boolean previewedLinks) {
        sendMessage(message, true, previewedLinks, delay, false, null);
    }

    public Pair<Account,Account> onboardingIncomplete() {
        if (getAccounts().size() != 2) return null;
        Account onboarding = null;
        Account newAccount = null;
        for (final Account account : getAccounts()) {
            if (account.getJid().getDomain().equals(Config.ONBOARDING_DOMAIN)) {
                onboarding = account;
            } else {
                newAccount = account;
            }
        }

        if (onboarding != null && newAccount != null) {
            return new Pair<>(onboarding, newAccount);
        }

        return null;
    }

    public boolean isOnboarding() {
        return getAccounts().size() == 1 && getAccounts().get(0).getJid().getDomain().equals(Config.ONBOARDING_DOMAIN);
    }

    public void requestEasyOnboardingInvite(
            final Account account, final EasyOnboardingInvite.OnInviteRequested callback) {
        final XmppConnection connection = account.getXmppConnection();
        final Jid jid =
                connection == null
                        ? null
                        : connection.getJidForCommand(Namespace.EASY_ONBOARDING_INVITE);
        if (jid == null) {
            callback.inviteRequestFailed(
                    getString(R.string.server_does_not_support_easy_onboarding_invites));
            return;
        }
        final Iq request = new Iq(Iq.Type.SET);
        request.setTo(jid);
        final Element command = request.addChild("command", Namespace.COMMANDS);
        command.setAttribute("node", Namespace.EASY_ONBOARDING_INVITE);
        command.setAttribute("action", "execute");
        sendIqPacket(
                account,
                request,
                (response) -> {
                    if (response.getType() == Iq.Type.RESULT) {
                        final Element resultCommand =
                                response.findChild("command", Namespace.COMMANDS);
                        final Element x =
                                resultCommand == null
                                        ? null
                                        : resultCommand.findChild("x", Namespace.DATA);
                        if (x != null) {
                            final Data data = Data.parse(x);
                            final String uri = data.getValue("uri");
                            final String landingUrl = data.getValue("landing-url");
                            if (uri != null) {
                                final EasyOnboardingInvite invite =
                                        new EasyOnboardingInvite(
                                                jid.getDomain().toString(), uri, landingUrl);
                                callback.inviteRequested(invite);
                                return;
                            }
                        }
                        callback.inviteRequestFailed(getString(R.string.unable_to_parse_invite));
                        Log.d(Config.LOGTAG, response.toString());
                    } else if (response.getType() == Iq.Type.ERROR) {
                        callback.inviteRequestFailed(IqParser.errorMessage(response));
                    } else {
                        callback.inviteRequestFailed(getString(R.string.remote_server_timeout));
                    }
                });
    }

    public void fetchBookmarks(final Account account) {
        final Iq iqPacket = new Iq(Iq.Type.GET);
        iqPacket.addExtension(new PrivateStorage()).addExtension(new Storage());
        final Consumer<Iq> callback =
                (response) -> {
                    if (response.getType() == Iq.Type.RESULT) {
                        final var privateStorage = response.getExtension(PrivateStorage.class);
                        if (privateStorage == null) {
                            return;
                        }
                        final var bookmarkStorage = privateStorage.getExtension(Storage.class);
                        Map<Jid, Bookmark> bookmarks =
                                Bookmark.parseFromStorage(bookmarkStorage, account);
                        processBookmarksInitial(account, bookmarks, false);
                    } else {
                        Log.d(
                                Config.LOGTAG,
                                account.getJid().asBareJid() + ": could not fetch bookmarks");
                    }
                };
        sendIqPacket(account, iqPacket, callback);
    }

    public void fetchBookmarks2(final Account account) {
        final Iq retrieve = mIqGenerator.retrieveBookmarks();
        sendIqPacket(
                account,
                retrieve,
                (response) -> {
                    if (response.getType() == Iq.Type.RESULT) {
                        final var pubsub = response.getExtension(PubSub.class);
                        final Map<Jid, Bookmark> bookmarks =
                                Bookmark.parseFromPubSub(pubsub, account);
                        processBookmarksInitial(account, bookmarks, true);
                    }
                });
    }

    public void fetchMessageDisplayedSynchronization(final Account account) {
        Log.d(Config.LOGTAG, account.getJid() + ": retrieve mds");
        final var retrieve = mIqGenerator.retrieveMds();
        sendIqPacket(
                account,
                retrieve,
                (response) -> {
                    if (response.getType() != Iq.Type.RESULT) {
                        return;
                    }
                    final var pubsub = response.getExtension(PubSub.class);
                    if (pubsub == null) {
                        return;
                    }
                    final var items = pubsub.getItems();
                    if (items == null) {
                        return;
                    }
                    if (Namespace.MDS_DISPLAYED.equals(items.getNode())) {
                        for (final var item :
                                items.getItemMap(
                                                im.conversations.android.xmpp.model.mds.Displayed
                                                        .class)
                                        .entrySet()) {
                            processMdsItem(account, item);
                        }
                    }
                });
    }

    public void processMdsItem(final Account account, final Map.Entry<String, Displayed> item) {
        final Jid jid = Jid.Invalid.getNullForInvalid(Jid.ofOrInvalid(item.getKey()));
        if (jid == null) {
            return;
        }
        final var displayed = item.getValue();
        final var stanzaId = displayed.getStanzaId();
        final String id = stanzaId == null ? null : stanzaId.getId();
        final Conversation conversation = find(account, jid);
        if (id != null && conversation != null) {
            conversation.setDisplayState(id);
            markReadUpToStanzaId(conversation, id);
        }
    }

    public void markReadUpToStanzaId(final Conversation conversation, final String stanzaId) {
        final Message message = conversation.findMessageWithServerMsgId(stanzaId);
        if (message == null) { // do we want to check if isRead?
            return;
        }
        markReadUpTo(conversation, message);
    }

    public void markReadUpTo(final Conversation conversation, final Message message) {
        final boolean isDismissNotification = isDismissNotification(message);
        final var uuid = message.getUuid();
        Log.d(
                Config.LOGTAG,
                conversation.getAccount().getJid().asBareJid()
                        + ": mark "
                        + conversation.getJid().asBareJid()
                        + " as read up to "
                        + uuid);
        markRead(conversation, uuid, isDismissNotification);
    }

    private static boolean isDismissNotification(final Message message) {
        Message next = message.next();
        while (next != null) {
            if (message.getStatus() == Message.STATUS_RECEIVED) {
                return false;
            }
            next = next.next();
        }
        return true;
    }

    public void processBookmarksInitial(
            final Account account, final Map<Jid, Bookmark> bookmarks, final boolean pep) {
        final Set<Jid> previousBookmarks = account.getBookmarkedJids();
        for (final Bookmark bookmark : bookmarks.values()) {
            previousBookmarks.remove(bookmark.getJid().asBareJid());
            processModifiedBookmark(bookmark, pep);
        }
        if (pep) {
            processDeletedBookmarks(account, previousBookmarks);
        }
        account.setBookmarks(bookmarks);
    }

    public void processDeletedBookmarks(final Account account, final Collection<Jid> bookmarks) {
        Log.d(
                Config.LOGTAG,
                account.getJid().asBareJid()
                        + ": "
                        + bookmarks.size()
                        + " bookmarks have been removed");
        for (final Jid bookmark : bookmarks) {
            processDeletedBookmark(account, bookmark);
        }
    }

    public void processDeletedBookmark(final Account account, final Jid jid) {
        final Conversation conversation = find(account, jid);
        if (conversation == null) {
            return;
        }
        Log.d(
                Config.LOGTAG,
                account.getJid().asBareJid() + ": archiving MUC " + jid + " after PEP update");
        archiveConversation(conversation, false);
    }

    private void processModifiedBookmark(final Bookmark bookmark, final boolean pep) {
        final Account account = bookmark.getAccount();
        Conversation conversation = find(bookmark);
        if (conversation != null) {
            if (conversation.getMode() != Conversation.MODE_MULTI) {
                return;
            }
            bookmark.setConversation(conversation);
            if (pep && !bookmark.autojoin()) {
                Log.d(
                        Config.LOGTAG,
                        account.getJid().asBareJid()
                                + ": archiving conference ("
                                + conversation.getJid()
                                + ") after receiving pep");
                archiveConversation(conversation, false);
            } else {
                final MucOptions mucOptions = conversation.getMucOptions();
                if (mucOptions.getError() == MucOptions.Error.NICK_IN_USE) {
                    final String current = mucOptions.getActualNick();
                    final String proposed = mucOptions.getProposedNickPure();
                    if (current != null && !current.equals(proposed)) {
                        Log.d(
                                Config.LOGTAG,
                                account.getJid().asBareJid()
                                        + ": proposed nick changed after bookmark push "
                                        + current
                                        + "->"
                                        + proposed);
                        joinMuc(conversation);
                    }
                } else {
                    checkMucRequiresRename(conversation);
                }
            }
        } else if (bookmark.autojoin()) {
            conversation =
                    findOrCreateConversation(account, bookmark.getFullJid(), true, true, false);
            bookmark.setConversation(conversation);
        }
    }

    public void processModifiedBookmark(final Bookmark bookmark) {
        processModifiedBookmark(bookmark, true);
    }

    public void ensureBookmarkIsAutoJoin(final Conversation conversation) {
        final var account = conversation.getAccount();
        final var existingBookmark = conversation.getBookmark();
        if (existingBookmark == null) {
            final var bookmark = new Bookmark(account, conversation.getJid().asBareJid());
            bookmark.setAutojoin(true);
            createBookmark(account, bookmark);
        } else {
            if (existingBookmark.autojoin()) {
                return;
            }
            existingBookmark.setAutojoin(true);
            createBookmark(account, existingBookmark);
        }
    }

    public void createBookmark(final Account account, final Bookmark bookmark) {
        account.putBookmark(bookmark);
        final XmppConnection connection = account.getXmppConnection();
        if (connection == null) {
            Log.d(
                    Config.LOGTAG,
                    account.getJid().asBareJid() + ": no connection. ignoring bookmark creation");
        } else if (connection.getFeatures().bookmarks2()) {
            Log.d(
                    Config.LOGTAG,
                    account.getJid().asBareJid() + ": pushing bookmark via Bookmarks 2");
            final Element item = mIqGenerator.publishBookmarkItem(bookmark);
            pushNodeAndEnforcePublishOptions(
                    account,
                    Namespace.BOOKMARKS2,
                    item,
                    bookmark.getJid().asBareJid().toString(),
                    PublishOptions.persistentWhitelistAccessMaxItems());
        } else if (connection.getFeatures().bookmarksConversion()) {
            pushBookmarksPep(account);
        } else {
            pushBookmarksPrivateXml(account);
        }
    }

    public void deleteBookmark(final Account account, final Bookmark bookmark) {
        if (bookmark.getJid().toString().equals("discuss@conference.soprani.ca")) {
            getPreferences().edit().putBoolean("cheogram_sopranica_bookmark_deleted", true).apply();
        }
        account.removeBookmark(bookmark);
        final XmppConnection connection = account.getXmppConnection();
        if (connection == null) return;

        if (connection.getFeatures().bookmarks2()) {
            final Iq request =
                    mIqGenerator.deleteItem(
                            Namespace.BOOKMARKS2, bookmark.getJid().asBareJid().toString());
            Log.d(
                    Config.LOGTAG,
                    account.getJid().asBareJid() + ": removing bookmark via Bookmarks 2");
            sendIqPacket(
                    account,
                    request,
                    (response) -> {
                        if (response.getType() == Iq.Type.ERROR) {
                            Log.d(
                                    Config.LOGTAG,
                                    account.getJid().asBareJid()
                                            + ": unable to delete bookmark "
                                            + response.getErrorCondition());
                        }
                    });
        } else if (connection.getFeatures().bookmarksConversion()) {
            pushBookmarksPep(account);
        } else {
            pushBookmarksPrivateXml(account);
        }
    }

    private void pushBookmarksPrivateXml(Account account) {
        if (!account.areBookmarksLoaded()) return;

        Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": pushing bookmarks via private xml");
        final Iq iqPacket = new Iq(Iq.Type.SET);
        Element query = iqPacket.query("jabber:iq:private");
        Element storage = query.addChild("storage", "storage:bookmarks");
        for (final Bookmark bookmark : account.getBookmarks()) {
            storage.addChild(bookmark);
        }
        sendIqPacket(account, iqPacket, mDefaultIqHandler);
    }

    private void pushBookmarksPep(Account account) {
        if (!account.areBookmarksLoaded()) return;

        Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": pushing bookmarks via pep");
        final Element storage = new Element("storage", "storage:bookmarks");
        for (final Bookmark bookmark : account.getBookmarks()) {
            storage.addChild(bookmark);
        }
        pushNodeAndEnforcePublishOptions(
                account,
                Namespace.BOOKMARKS,
                storage,
                "current",
                PublishOptions.persistentWhitelistAccess());
    }

    private void pushNodeAndEnforcePublishOptions(
            final Account account,
            final String node,
            final Element element,
            final String id,
            final Bundle options) {
        pushNodeAndEnforcePublishOptions(account, node, element, id, options, true);
    }

    private void pushNodeAndEnforcePublishOptions(
            final Account account,
            final String node,
            final Element element,
            final String id,
            final Bundle options,
            final boolean retry) {
        final Iq packet = mIqGenerator.publishElement(node, element, id, options);
        sendIqPacket(
                account,
                packet,
                (response) -> {
                    if (response.getType() == Iq.Type.RESULT) {
                        return;
                    }
                    if (retry && PublishOptions.preconditionNotMet(response)) {
                        pushNodeConfiguration(
                                account,
                                node,
                                options,
                                new OnConfigurationPushed() {
                                    @Override
                                    public void onPushSucceeded() {
                                        pushNodeAndEnforcePublishOptions(
                                                account, node, element, id, options, false);
                                    }

                                    @Override
                                    public void onPushFailed() {
                                        Log.d(
                                                Config.LOGTAG,
                                                account.getJid().asBareJid()
                                                        + ": unable to push node configuration ("
                                                        + node
                                                        + ")");
                                    }
                                });
                    } else {
                        Log.d(
                                Config.LOGTAG,
                                account.getJid().asBareJid()
                                        + ": error publishing "
                                        + node
                                        + " (retry="
                                        + retry
                                        + ") "
                                        + response);
                    }
                });
    }

    private void restoreFromDatabase() {
        synchronized (this.conversations) {
            final Map<String, Account> accountLookupTable =
                    ImmutableMap.copyOf(Maps.uniqueIndex(this.accounts, Account::getUuid));
            Log.d(Config.LOGTAG, "restoring conversations...");
            final long startTimeConversationsRestore = SystemClock.elapsedRealtime();
            this.conversations.addAll(
                    databaseBackend.getConversations(Conversation.STATUS_AVAILABLE));
            for (Iterator<Conversation> iterator = conversations.listIterator();
                    iterator.hasNext(); ) {
                Conversation conversation = iterator.next();
                Account account = accountLookupTable.get(conversation.getAccountUuid());
                if (account != null) {
                    conversation.setAccount(account);
                } else {
                    Log.e(Config.LOGTAG, "unable to restore Conversations with " + conversation.getJid());
                    conversations.remove(conversation);
                }
            }
            long diffConversationsRestore = SystemClock.elapsedRealtime() - startTimeConversationsRestore;
            Log.d(Config.LOGTAG, "finished restoring conversations in " + diffConversationsRestore + "ms");
            Runnable runnable = () -> {
                if (DatabaseBackend.requiresMessageIndexRebuild()) {
                    DatabaseBackend.getInstance(this).rebuildMessagesIndex();
                }
                mutedMucUsers = databaseBackend.loadMutedMucUsers();
                final long deletionDate = getAutomaticMessageDeletionDate();
                mLastExpiryRun.set(SystemClock.elapsedRealtime());
                if (deletionDate > 0) {
                    Log.d(Config.LOGTAG, "deleting messages that are older than " + AbstractGenerator.getTimestamp(deletionDate));
                    databaseBackend.expireOldMessages(deletionDate);
                }
                Log.d(Config.LOGTAG, "restoring roster...");
                for (final Account account : accounts) {
                    databaseBackend.readRoster(account.getRoster());
                    account.initAccountServices(XmppConnectionService.this); //roster needs to be loaded at this stage
                }
                getDrawableCache().evictAll();
                loadPhoneContacts();
                Log.d(Config.LOGTAG, "restoring messages...");
                final long startMessageRestore = SystemClock.elapsedRealtime();
                final Conversation quickLoad = QuickLoader.get(this.conversations);
                if (quickLoad != null) {
                    restoreMessages(quickLoad);
                    updateConversationUi();
                    final long diffMessageRestore = SystemClock.elapsedRealtime() - startMessageRestore;
                    Log.d(Config.LOGTAG, "quickly restored " + quickLoad.getName() + " after " + diffMessageRestore + "ms");
                }
                for (Conversation conversation : this.conversations) {
                    if (quickLoad != conversation) {
                        restoreMessages(conversation);
                    }
                }
                mNotificationService.finishBacklog();
                restoredFromDatabaseLatch.countDown();
                final long diffMessageRestore = SystemClock.elapsedRealtime() - startMessageRestore;
                Log.d(Config.LOGTAG, "finished restoring messages in " + diffMessageRestore + "ms");
                updateConversationUi();
            };
            mDatabaseReaderExecutor.execute(runnable); //will contain one write command (expiry) but that's fine
        }
    }

    private void restoreMessages(Conversation conversation) {
        conversation.addAll(0, databaseBackend.getMessages(conversation, Config.PAGE_SIZE));
        conversation.findUnsentTextMessages(message -> markMessage(message, Message.STATUS_WAITING));
        conversation.findMessagesAndCallsToNotify(mNotificationService::pushFromBacklog);
    }

    public void loadPhoneContacts() {
        mContactMergerExecutor.execute(
                () -> {
                    final Map<Jid, JabberIdContact> contacts = JabberIdContact.load(this);
                    Log.d(Config.LOGTAG, "start merging phone contacts with roster");
                    for (final Account account : accounts) {
                        final List<Contact> withSystemAccounts =
                                account.getRoster().getWithSystemAccounts(JabberIdContact.class);
                        for (final JabberIdContact jidContact : contacts.values()) {
                            final Contact contact =
                                    account.getRoster().getContact(jidContact.getJid());
                            boolean needsCacheClean = contact.setPhoneContact(jidContact);
                            if (needsCacheClean) {
                                getAvatarService().clear(contact);
                            }
                            withSystemAccounts.remove(contact);
                        }
                        for (final Contact contact : withSystemAccounts) {
                            boolean needsCacheClean =
                                    contact.unsetPhoneContact(JabberIdContact.class);
                            if (needsCacheClean) {
                                getAvatarService().clear(contact);
                            }
                        }
                    }
                    Log.d(Config.LOGTAG, "finished merging phone contacts");
                    mShortcutService.refresh(
                            mInitialAddressbookSyncCompleted.compareAndSet(false, true));
                    updateRosterUi(UpdateRosterReason.PUSH);
                    mQuickConversationsService.considerSync();
                });
    }

    public void syncRoster(final Account account) {
        mRosterSyncTaskManager.execute(account, () -> {
            unregisterPhoneAccounts(account);
            databaseBackend.writeRoster(account.getRoster());
            try { Thread.sleep(500); } catch (InterruptedException e) { }
        });
    }

    public List<Conversation> getConversations() {
        return this.conversations;
    }

    private void markFileDeleted(final File file) {
        synchronized (FILENAMES_TO_IGNORE_DELETION) {
            if (FILENAMES_TO_IGNORE_DELETION.remove(file.getAbsolutePath())) {
                Log.d(Config.LOGTAG, "ignored deletion of " + file.getAbsolutePath());
                return;
            }
        }
        final boolean isInternalFile = fileBackend.isInternalFile(file);
        final List<String> uuids = databaseBackend.markFileAsDeleted(file, isInternalFile);
        Log.d(
                Config.LOGTAG,
                "deleted file "
                        + file.getAbsolutePath()
                        + " internal="
                        + isInternalFile
                        + ", database hits="
                        + uuids.size());
        markUuidsAsDeletedFiles(uuids);
    }

    private void markUuidsAsDeletedFiles(List<String> uuids) {
        boolean deleted = false;
        for (Conversation conversation : getConversations()) {
            deleted |= conversation.markAsDeleted(uuids);
        }
        for (final String uuid : uuids) {
            evictPreview(uuid);
        }
        if (deleted) {
            updateConversationUi();
        }
    }

    private void markChangedFiles(List<DatabaseBackend.FilePathInfo> infos) {
        boolean changed = false;
        for (Conversation conversation : getConversations()) {
            changed |= conversation.markAsChanged(infos);
        }
        if (changed) {
            updateConversationUi();
        }
    }

    public void populateWithOrderedConversations(final List<Conversation> list) {
        populateWithOrderedConversations(list, true, true);
    }

    public void populateWithOrderedConversations(
            final List<Conversation> list, final boolean includeNoFileUpload) {
        populateWithOrderedConversations(list, includeNoFileUpload, true);
    }

    public void populateWithOrderedConversations(
            final List<Conversation> list, final boolean includeNoFileUpload, final boolean sort) {
        final List<String> orderedUuids;
        if (sort) {
            orderedUuids = null;
        } else {
            orderedUuids = new ArrayList<>();
            for (Conversation conversation : list) {
                orderedUuids.add(conversation.getUuid());
            }
        }
        list.clear();
        if (includeNoFileUpload) {
            list.addAll(getConversations());
        } else {
            for (Conversation conversation : getConversations()) {
                if (conversation.getMode() == Conversation.MODE_SINGLE
                        || (conversation.getAccount().httpUploadAvailable()
                                && conversation.getMucOptions().participating())) {
                    list.add(conversation);
                }
            }
        }
        try {
            if (orderedUuids != null) {
                Collections.sort(
                        list,
                        (a, b) -> {
                            final int indexA = orderedUuids.indexOf(a.getUuid());
                            final int indexB = orderedUuids.indexOf(b.getUuid());
                            if (indexA == -1 || indexB == -1 || indexA == indexB) {
                                return a.compareTo(b);
                            }
                            return indexA - indexB;
                        });
            } else {
                Collections.sort(list);
            }
        } catch (IllegalArgumentException e) {
            // ignore
        }
    }

    public void loadMoreMessages(
            final Conversation conversation,
            final long timestamp,
            final OnMoreMessagesLoaded callback) {
        if (XmppConnectionService.this
                .getMessageArchiveService()
                .queryInProgress(conversation, callback)) {
            return;
        } else if (timestamp == 0) {
            return;
        }
        Log.d(
                Config.LOGTAG,
                "load more messages for "
                        + conversation.getName()
                        + " prior to "
                        + MessageGenerator.getTimestamp(timestamp));
        final Runnable runnable =
                () -> {
                    final Account account = conversation.getAccount();
                    List<Message> messages =
                            databaseBackend.getMessages(conversation, 50, timestamp);
                    if (messages.size() > 0) {
                        conversation.addAll(0, messages);
                        callback.onMoreMessagesLoaded(messages.size(), conversation);
                    } else if (conversation.hasMessagesLeftOnServer()
                            && account.isOnlineAndConnected()
                            && conversation.getLastClearHistory().getTimestamp() == 0) {
                        final boolean mamAvailable;
                        if (conversation.getMode() == Conversation.MODE_SINGLE) {
                            mamAvailable =
                                    account.getXmppConnection().getFeatures().mam()
                                            && !conversation.getContact().isBlocked();
                        } else {
                            mamAvailable = conversation.getMucOptions().mamSupport();
                        }
                        if (mamAvailable) {
                            MessageArchiveService.Query query =
                                    getMessageArchiveService()
                                            .query(
                                                    conversation,
                                                    new MamReference(0),
                                                    timestamp,
                                                    false);
                            if (query != null) {
                                query.setCallback(callback);
                                callback.informUser(R.string.fetching_history_from_server);
                            } else {
                                callback.informUser(R.string.not_fetching_history_retention_period);
                            }
                        }
                    }
                };
        mDatabaseReaderExecutor.execute(runnable);
    }

    public List<Account> getAccounts() {
        return this.accounts;
    }

    /**
     * This will find all conferences with the contact as member and also the conference that is the
     * contact (that 'fake' contact is used to store the avatar)
     */
    public List<Conversation> findAllConferencesWith(Contact contact) {
        final ArrayList<Conversation> results = new ArrayList<>();
        for (final Conversation c : conversations) {
            if (c.getMode() != Conversation.MODE_MULTI) {
                continue;
            }
            final MucOptions mucOptions = c.getMucOptions();
            if (c.getJid().asBareJid().equals(contact.getJid().asBareJid())
                    || (mucOptions != null && mucOptions.isContactInRoom(contact))) {
                results.add(c);
            }
        }
        return results;
    }

    public Conversation find(final Contact contact) {
        for (final Conversation conversation : this.conversations) {
            if (conversation.getContact() == contact) {
                return conversation;
            }
        }
        return null;
    }

    public Conversation find(
            final Iterable<Conversation> haystack, final Account account, final Jid jid) {
        if (jid == null) {
            return null;
        }
        for (final Conversation conversation : haystack) {
            if ((account == null || conversation.getAccount() == account)
                    && (conversation.getJid().asBareJid().equals(jid.asBareJid()))) {
                return conversation;
            }
        }
        return null;
    }

    public boolean isConversationsListEmpty(final Conversation ignore) {
        synchronized (this.conversations) {
            final int size = this.conversations.size();
            return size == 0 || size == 1 && this.conversations.get(0) == ignore;
        }
    }

    public boolean isConversationStillOpen(final Conversation conversation) {
        synchronized (this.conversations) {
            for (Conversation current : this.conversations) {
                if (current == conversation) {
                    return true;
                }
            }
        }
        return false;
    }

    public void maybeRegisterWithMuc(Conversation c, String nickArg) {
        final var nick = nickArg == null ? c.getMucOptions().getSelf().getFullJid().getResource() : nickArg;
        final var register = new Iq(Iq.Type.GET);
        register.query(Namespace.REGISTER);
        register.setTo(c.getJid().asBareJid());
        sendIqPacket(c.getAccount(), register, (response) -> {
            if (response.getType() == Iq.Type.RESULT) {
                final Element query = response.query(Namespace.REGISTER);
                String username = query.findChildContent("username", Namespace.REGISTER);
                if (username == null) username = query.findChildContent("nick", Namespace.REGISTER);
                if (username != null && username.equals(nick)) {
                    // Already registered with this nick, done
                    Log.d(Config.LOGTAG, "Already registered with " + c.getJid().asBareJid() + " as " + username);
                    return;
                }
                Data form = Data.parse(query.findChild("x", Namespace.DATA));
                if (form != null) {
                    final var field = form.getFieldByName("muc#register_roomnick");
                    if (field != null && nick.equals(field.getValue())) {
                        Log.d(Config.LOGTAG, "Already registered with " + c.getJid().asBareJid() + " as " + field.getValue());
                        return;
                    }
                }
                if (form == null || !"form".equals(form.getFormType()) || !form.getFields().stream().anyMatch(f -> f.isRequired() && !"muc#register_roomnick".equals(f.getFieldName()))) {
                    // No form, result form, or no required fields other than nickname, let's just send nickname
                    if (form == null || !"form".equals(form.getFormType())) {
                        form = new Data();
                        form.put("FORM_TYPE", "http://jabber.org/protocol/muc#register");
                    }
                    form.put("muc#register_roomnick", nick);
                    form.submit();
                    final var finish = new Iq(Iq.Type.SET);
                    finish.query(Namespace.REGISTER).addChild(form);
                    finish.setTo(c.getJid().asBareJid());
                    sendIqPacket(c.getAccount(), finish, (response2) -> {
                        if (response.getType() == Iq.Type.RESULT) {
                            Log.w(Config.LOGTAG, "Success registering with channel " + c.getJid().asBareJid() + "/" + nick);
                        } else {
                            Log.w(Config.LOGTAG, "Error registering with channel: " + response2);
                        }
                    });
                } else {
                    // TODO: offer registration form to user
                    Log.d(Config.LOGTAG, "Complex registration form for " + c.getJid().asBareJid() + ": " + response);
                }
            } else {
                // We said maybe. Guess not
                Log.d(Config.LOGTAG, "Could not register with " + c.getJid().asBareJid() + ": " + response);
            }
        });
    }

    public void deregisterWithMuc(Conversation c) {
        final Iq register = new Iq(Iq.Type.GET);
        register.query(Namespace.REGISTER).addChild("remove");
        register.setTo(c.getJid().asBareJid());
        sendIqPacket(c.getAccount(), register, (response) -> {
            if (response.getType() == Iq.Type.RESULT) {
                Log.d(Config.LOGTAG, "deregistered with " + c.getJid().asBareJid());
            } else {
                Log.w(Config.LOGTAG, "Could not deregister with " + c.getJid().asBareJid() + ": " + response);
            }
        });
    }

    public Conversation findOrCreateConversation(
            Account account, Jid jid, boolean muc, final boolean async) {
        return this.findOrCreateConversation(account, jid, muc, false, async);
    }

    public Conversation findOrCreateConversation(
            final Account account,
            final Jid jid,
            final boolean muc,
            final boolean joinAfterCreate,
            final boolean async) {
        return this.findOrCreateConversation(account, jid, muc, joinAfterCreate, null, async, null);
    }

    public Conversation findOrCreateConversation(final Account account, final Jid jid, final boolean muc, final boolean joinAfterCreate, final MessageArchiveService.Query query, final boolean async) {
        return this.findOrCreateConversation(account, jid, muc, joinAfterCreate, query, async, null);
    }

    public Conversation findOrCreateConversation(
            final Account account,
            final Jid jid,
            final boolean muc,
            final boolean joinAfterCreate,
            final MessageArchiveService.Query query,
            final boolean async,
            final String password) {
        synchronized (this.conversations) {
            final var cached = find(account, jid);
            if (cached != null) {
                return cached;
            }
            final var existing = databaseBackend.findConversation(account, jid);
            final Conversation conversation;
            final boolean loadMessagesFromDb;
            if (existing != null) {
                conversation = existing;
                if (password != null) conversation.getMucOptions().setPassword(password);
                loadMessagesFromDb = restoreFromArchive(conversation, jid, muc);
            } else {
                String conversationName;
                final Contact contact = account.getRoster().getContact(jid);
                if (contact != null) {
                    conversationName = contact.getDisplayName();
                } else {
                    conversationName = jid.getLocal();
                }
                if (muc) {
                    conversation =
                            new Conversation(
                                    conversationName, account, jid, Conversation.MODE_MULTI);
                } else {
                    conversation =
                            new Conversation(
                                    conversationName,
                                    account,
                                    jid.asBareJid(),
                                    Conversation.MODE_SINGLE);
                }
                if (password != null) conversation.getMucOptions().setPassword(password);
                this.databaseBackend.createConversation(conversation);
                loadMessagesFromDb = false;
            }
            if (async) {
                mDatabaseReaderExecutor.execute(
                        () ->
                                postProcessConversation(
                                        conversation, loadMessagesFromDb, joinAfterCreate, query));
            } else {
                postProcessConversation(conversation, loadMessagesFromDb, joinAfterCreate, query);
            }
            this.conversations.add(conversation);
            updateConversationUi();
            return conversation;
        }
    }

    public Conversation findConversationByUuidReliable(final String uuid) {
        final var cached = findConversationByUuid(uuid);
        if (cached != null) {
            return cached;
        }
        final var existing = databaseBackend.findConversation(uuid);
        if (existing == null) {
            return null;
        }
        Log.d(Config.LOGTAG, "restoring conversation with " + existing.getJid() + " from DB");
        final Map<String, Account> accounts =
                ImmutableMap.copyOf(Maps.uniqueIndex(this.accounts, Account::getUuid));
        final var account = accounts.get(existing.getAccountUuid());
        if (account == null) {
            Log.d(Config.LOGTAG, "could not find account " + existing.getAccountUuid());
            return null;
        }
        existing.setAccount(account);
        final var loadMessagesFromDb = restoreFromArchive(existing);
        mDatabaseReaderExecutor.execute(
                () ->
                        postProcessConversation(
                                existing,
                                loadMessagesFromDb,
                                existing.getMode() == Conversational.MODE_MULTI,
                                null));
        this.conversations.add(existing);
        if (existing.getMode() == Conversational.MODE_MULTI) {
            ensureBookmarkIsAutoJoin(existing);
        }
        updateConversationUi();
        return existing;
    }

    private boolean restoreFromArchive(
            final Conversation conversation, final Jid jid, final boolean muc) {
        if (muc) {
            conversation.setMode(Conversation.MODE_MULTI);
            conversation.setContactJid(jid);
        } else {
            conversation.setMode(Conversation.MODE_SINGLE);
            conversation.setContactJid(jid.asBareJid());
        }
        return restoreFromArchive(conversation);
    }

    private boolean restoreFromArchive(final Conversation conversation) {
        conversation.setStatus(Conversation.STATUS_AVAILABLE);
        databaseBackend.updateConversation(conversation);
        return conversation.messagesLoaded.compareAndSet(true, false);
    }

    private void postProcessConversation(
            final Conversation c,
            final boolean loadMessagesFromDb,
            final boolean joinAfterCreate,
            final MessageArchiveService.Query query) {
        final var singleMode = c.getMode() == Conversational.MODE_SINGLE;
        final var account = c.getAccount();
        if (loadMessagesFromDb) {
            c.addAll(0, databaseBackend.getMessages(c, Config.PAGE_SIZE));
            updateConversationUi();
            c.messagesLoaded.set(true);
        }
        if (account.getXmppConnection() != null
                && !c.getContact().isBlocked()
                && account.getXmppConnection().getFeatures().mam()
                && singleMode) {
            if (query == null) {
                mMessageArchiveService.query(c);
            } else {
                if (query.getConversation() == null) {
                    mMessageArchiveService.query(c, query.getStart(), query.isCatchup());
                }
            }
        }
        if (joinAfterCreate) {
            joinMuc(c);
        }
    }

    public void archiveConversation(Conversation conversation) {
        archiveConversation(conversation, true);
    }

    private void archiveConversation(
            Conversation conversation, final boolean maySynchronizeWithBookmarks) {
        if (isOnboarding()) return;

        getNotificationService().clear(conversation);
        conversation.setStatus(Conversation.STATUS_ARCHIVED);
        conversation.setNextMessage(null);
        synchronized (this.conversations) {
            getMessageArchiveService().kill(conversation);
            if (conversation.getMode() == Conversation.MODE_MULTI) {
                if (conversation.getAccount().getStatus() == Account.State.ONLINE) {
                    final Bookmark bookmark = conversation.getBookmark();
                    if (maySynchronizeWithBookmarks && bookmark != null) {
                        if (conversation.getMucOptions().getError() == MucOptions.Error.DESTROYED) {
                            Account account = bookmark.getAccount();
                            bookmark.setConversation(null);
                            deleteBookmark(account, bookmark);
                        } else if (bookmark.autojoin()) {
                            bookmark.setAutojoin(false);
                            createBookmark(bookmark.getAccount(), bookmark);
                        }
                    }
                }
                deregisterWithMuc(conversation);
                leaveMuc(conversation);
            } else {
                if (conversation
                        .getContact()
                        .getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
                    stopPresenceUpdatesTo(conversation.getContact());
                }
            }
            updateConversation(conversation);
            this.conversations.remove(conversation);
            updateConversationUi();
        }
    }

    public void stopPresenceUpdatesTo(Contact contact) {
        Log.d(Config.LOGTAG, "Canceling presence request from " + contact.getJid().toString());
        sendPresencePacket(contact.getAccount(), mPresenceGenerator.stopPresenceUpdatesTo(contact));
        contact.resetOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST);
    }

    public void createAccount(final Account account) {
        account.initAccountServices(this);
        databaseBackend.createAccount(account);
        if (CallIntegration.hasSystemFeature(this)) {
            CallIntegrationConnectionService.togglePhoneAccountAsync(this, account);
        }
        this.accounts.add(account);
        this.reconnectAccountInBackground(account);
        updateAccountUi();
        syncEnabledAccountSetting();
        toggleForegroundService();
    }

    private void syncEnabledAccountSetting() {
        final boolean hasEnabledAccounts = hasEnabledAccounts();
        getPreferences()
                .edit()
                .putBoolean(SystemEventReceiver.SETTING_ENABLED_ACCOUNTS, hasEnabledAccounts)
                .apply();
        toggleSetProfilePictureActivity(hasEnabledAccounts);
    }

    private void toggleSetProfilePictureActivity(final boolean enabled) {
        try {
            final ComponentName name =
                    new ComponentName(this, ChooseAccountForProfilePictureActivity.class);
            final int targetState =
                    enabled
                            ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED
                            : PackageManager.COMPONENT_ENABLED_STATE_DISABLED;
            getPackageManager()
                    .setComponentEnabledSetting(name, targetState, PackageManager.DONT_KILL_APP);
        } catch (IllegalStateException e) {
            Log.d(Config.LOGTAG, "unable to toggle profile picture activity");
        }
    }

    public boolean reconfigurePushDistributor() {
        return this.unifiedPushBroker.reconfigurePushDistributor();
    }

    private Optional<UnifiedPushBroker.Transport> renewUnifiedPushEndpoints(
            final UnifiedPushBroker.PushTargetMessenger pushTargetMessenger) {
        return this.unifiedPushBroker.renewUnifiedPushEndpoints(pushTargetMessenger);
    }

    public Optional<UnifiedPushBroker.Transport> renewUnifiedPushEndpoints() {
        return this.unifiedPushBroker.renewUnifiedPushEndpoints(null);
    }

    public UnifiedPushBroker getUnifiedPushBroker() {
        return this.unifiedPushBroker;
    }

    private void provisionAccount(final String address, final String password) {
        final Jid jid = Jid.of(address);
        final Account account = new Account(jid, password);
        account.setOption(Account.OPTION_DISABLED, true);
        Log.d(Config.LOGTAG, jid.asBareJid().toString() + ": provisioning account");
        createAccount(account);
    }

    public void createAccountFromKey(final String alias, final OnAccountCreated callback) {
        new Thread(
                        () -> {
                            try {
                                final X509Certificate[] chain =
                                        KeyChain.getCertificateChain(this, alias);
                                final X509Certificate cert =
                                        chain != null && chain.length > 0 ? chain[0] : null;
                                if (cert == null) {
                                    callback.informUser(R.string.unable_to_parse_certificate);
                                    return;
                                }
                                Pair<Jid, String> info = CryptoHelper.extractJidAndName(cert);
                                if (info == null) {
                                    callback.informUser(R.string.certificate_does_not_contain_jid);
                                    return;
                                }
                                if (findAccountByJid(info.first) == null) {
                                    final Account account = new Account(info.first, "");
                                    account.setPrivateKeyAlias(alias);
                                    account.setOption(Account.OPTION_DISABLED, true);
                                    account.setOption(Account.OPTION_FIXED_USERNAME, true);
                                    account.setDisplayName(info.second);
                                    createAccount(account);
                                    callback.onAccountCreated(account);
                                    if (Config.X509_VERIFICATION) {
                                        try {
                                            getMemorizingTrustManager()
                                                    .getNonInteractive(account.getServer(), null, 0, null)
                                                    .checkClientTrusted(chain, "RSA");
                                        } catch (CertificateException e) {
                                            callback.informUser(
                                                    R.string.certificate_chain_is_not_trusted);
                                        }
                                    }
                                } else {
                                    callback.informUser(R.string.account_already_exists);
                                }
                            } catch (Exception e) {
                                callback.informUser(R.string.unable_to_parse_certificate);
                            }
                        })
                .start();
    }

    public void updateKeyInAccount(final Account account, final String alias) {
        Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": update key in account " + alias);
        try {
            X509Certificate[] chain =
                    KeyChain.getCertificateChain(XmppConnectionService.this, alias);
            Log.d(Config.LOGTAG, account.getJid().asBareJid() + " loaded certificate chain");
            Pair<Jid, String> info = CryptoHelper.extractJidAndName(chain[0]);
            if (info == null) {
                showErrorToastInUi(R.string.certificate_does_not_contain_jid);
                return;
            }
            if (account.getJid().asBareJid().equals(info.first)) {
                account.setPrivateKeyAlias(alias);
                account.setDisplayName(info.second);
                databaseBackend.updateAccount(account);
                if (Config.X509_VERIFICATION) {
                    try {
                        getMemorizingTrustManager()
                                .getNonInteractive()
                                .checkClientTrusted(chain, "RSA");
                    } catch (CertificateException e) {
                        showErrorToastInUi(R.string.certificate_chain_is_not_trusted);
                    }
                    account.getAxolotlService().regenerateKeys(true);
                }
            } else {
                showErrorToastInUi(R.string.jid_does_not_match_certificate);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public boolean updateAccount(final Account account) {
        if (databaseBackend.updateAccount(account)) {
            Integer color = account.getColorToSave();
            if (color == null) {
                getPreferences().edit().remove("account_color:" + account.getUuid()).commit();
            } else {
                getPreferences().edit().putInt("account_color:" + account.getUuid(), color.intValue()).commit();
            }
            account.setShowErrorNotification(true);
            this.statusListener.onStatusChanged(account);
            databaseBackend.updateAccount(account);
            reconnectAccountInBackground(account);
            updateAccountUi();
            getNotificationService().updateErrorNotification();
            toggleForegroundService();
            syncEnabledAccountSetting();
            mChannelDiscoveryService.cleanCache();
            if (CallIntegration.hasSystemFeature(this)) {
                CallIntegrationConnectionService.togglePhoneAccountAsync(this, account);
            }
            return true;
        } else {
            return false;
        }
    }

    public void updateAccountPasswordOnServer(
            final Account account,
            final String newPassword,
            final OnAccountPasswordChanged callback) {
        final Iq iq = getIqGenerator().generateSetPassword(account, newPassword);
        sendIqPacket(
                account,
                iq,
                (packet) -> {
                    if (packet.getType() == Iq.Type.RESULT) {
                        account.setPassword(newPassword);
                        account.setOption(Account.OPTION_MAGIC_CREATE, false);
                        databaseBackend.updateAccount(account);
                        callback.onPasswordChangeSucceeded();
                    } else {
                        callback.onPasswordChangeFailed();
                    }
                });
    }

    public void unregisterAccount(final Account account, final Consumer<Boolean> callback) {
        final Iq iqPacket = new Iq(Iq.Type.SET);
        final Element query = iqPacket.addChild("query", Namespace.REGISTER);
        query.addChild("remove");
        sendIqPacket(
                account,
                iqPacket,
                (response) -> {
                    if (response.getType() == Iq.Type.RESULT) {
                        deleteAccount(account);
                        callback.accept(true);
                    } else {
                        callback.accept(false);
                    }
                });
    }

    public void deleteAccount(final Account account) {
        getPreferences().edit().remove("onboarding_continued").commit();
        final boolean connected = account.getStatus() == Account.State.ONLINE;
        synchronized (this.conversations) {
            if (connected) {
                account.getAxolotlService().deleteOmemoIdentity();
            }
            for (final Conversation conversation : conversations) {
                if (conversation.getAccount() == account) {
                    if (conversation.getMode() == Conversation.MODE_MULTI) {
                        if (connected) {
                            leaveMuc(conversation);
                        }
                    }
                    conversations.remove(conversation);
                    mNotificationService.clear(conversation);
                }
            }
            new Thread(() -> {
                for (final Contact contact : account.getRoster().getContacts()) {
                    contact.unregisterAsPhoneAccount(this);
                }
            }).start();
            if (account.getXmppConnection() != null) {
                new Thread(() -> disconnect(account, !connected)).start();
            }
            final Runnable runnable =
                    () -> {
                        if (!databaseBackend.deleteAccount(account)) {
                            Log.d(
                                    Config.LOGTAG,
                                    account.getJid().asBareJid() + ": unable to delete account");
                        }
                    };
            mDatabaseWriterExecutor.execute(runnable);
            this.accounts.remove(account);
            if (CallIntegration.hasSystemFeature(this)) {
                CallIntegrationConnectionService.unregisterPhoneAccount(this, account);
            }
            this.mRosterSyncTaskManager.clear(account);
            updateAccountUi();
            mNotificationService.updateErrorNotification();
            syncEnabledAccountSetting();
            toggleForegroundService();
        }
    }

    public void setOnConversationListChangedListener(OnConversationUpdate listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            remainingListeners = checkListeners();
            if (!this.mOnConversationUpdates.add(listener)) {
                Log.w(
                        Config.LOGTAG,
                        listener.getClass().getName()
                                + " is already registered as ConversationListChangedListener");
            }
            this.mNotificationService.setIsInForeground(this.mOnConversationUpdates.size() > 0);
        }
        if (remainingListeners) {
            switchToForeground();
        }
    }

    public void removeOnConversationListChangedListener(OnConversationUpdate listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            this.mOnConversationUpdates.remove(listener);
            this.mNotificationService.setIsInForeground(this.mOnConversationUpdates.size() > 0);
            remainingListeners = checkListeners();
        }
        if (remainingListeners) {
            switchToBackground();
        }
    }

    public void setOnShowErrorToastListener(OnShowErrorToast listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            remainingListeners = checkListeners();
            if (!this.mOnShowErrorToasts.add(listener)) {
                Log.w(
                        Config.LOGTAG,
                        listener.getClass().getName()
                                + " is already registered as OnShowErrorToastListener");
            }
        }
        if (remainingListeners) {
            switchToForeground();
        }
    }

    public void removeOnShowErrorToastListener(OnShowErrorToast onShowErrorToast) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            this.mOnShowErrorToasts.remove(onShowErrorToast);
            remainingListeners = checkListeners();
        }
        if (remainingListeners) {
            switchToBackground();
        }
    }

    public void setOnAccountListChangedListener(OnAccountUpdate listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            remainingListeners = checkListeners();
            if (!this.mOnAccountUpdates.add(listener)) {
                Log.w(
                        Config.LOGTAG,
                        listener.getClass().getName()
                                + " is already registered as OnAccountListChangedtListener");
            }
        }
        if (remainingListeners) {
            switchToForeground();
        }
    }

    public void removeOnAccountListChangedListener(OnAccountUpdate listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            this.mOnAccountUpdates.remove(listener);
            remainingListeners = checkListeners();
        }
        if (remainingListeners) {
            switchToBackground();
        }
    }

    public void setOnCaptchaRequestedListener(OnCaptchaRequested listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            remainingListeners = checkListeners();
            if (!this.mOnCaptchaRequested.add(listener)) {
                Log.w(
                        Config.LOGTAG,
                        listener.getClass().getName()
                                + " is already registered as OnCaptchaRequestListener");
            }
        }
        if (remainingListeners) {
            switchToForeground();
        }
    }

    public void removeOnCaptchaRequestedListener(OnCaptchaRequested listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            this.mOnCaptchaRequested.remove(listener);
            remainingListeners = checkListeners();
        }
        if (remainingListeners) {
            switchToBackground();
        }
    }

    public void setOnRosterUpdateListener(final OnRosterUpdate listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            remainingListeners = checkListeners();
            if (!this.mOnRosterUpdates.add(listener)) {
                Log.w(
                        Config.LOGTAG,
                        listener.getClass().getName()
                                + " is already registered as OnRosterUpdateListener");
            }
        }
        if (remainingListeners) {
            switchToForeground();
        }
    }

    public void removeOnRosterUpdateListener(final OnRosterUpdate listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            this.mOnRosterUpdates.remove(listener);
            remainingListeners = checkListeners();
        }
        if (remainingListeners) {
            switchToBackground();
        }
    }

    public void setOnUpdateBlocklistListener(final OnUpdateBlocklist listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            remainingListeners = checkListeners();
            if (!this.mOnUpdateBlocklist.add(listener)) {
                Log.w(
                        Config.LOGTAG,
                        listener.getClass().getName()
                                + " is already registered as OnUpdateBlocklistListener");
            }
        }
        if (remainingListeners) {
            switchToForeground();
        }
    }

    public void removeOnUpdateBlocklistListener(final OnUpdateBlocklist listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            this.mOnUpdateBlocklist.remove(listener);
            remainingListeners = checkListeners();
        }
        if (remainingListeners) {
            switchToBackground();
        }
    }

    public void setOnKeyStatusUpdatedListener(final OnKeyStatusUpdated listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            remainingListeners = checkListeners();
            if (!this.mOnKeyStatusUpdated.add(listener)) {
                Log.w(
                        Config.LOGTAG,
                        listener.getClass().getName()
                                + " is already registered as OnKeyStatusUpdateListener");
            }
        }
        if (remainingListeners) {
            switchToForeground();
        }
    }

    public void removeOnNewKeysAvailableListener(final OnKeyStatusUpdated listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            this.mOnKeyStatusUpdated.remove(listener);
            remainingListeners = checkListeners();
        }
        if (remainingListeners) {
            switchToBackground();
        }
    }

    public void setOnRtpConnectionUpdateListener(final OnJingleRtpConnectionUpdate listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            remainingListeners = checkListeners();
            if (!this.onJingleRtpConnectionUpdate.add(listener)) {
                Log.w(
                        Config.LOGTAG,
                        listener.getClass().getName()
                                + " is already registered as OnJingleRtpConnectionUpdate");
            }
        }
        if (remainingListeners) {
            switchToForeground();
        }
    }

    public void removeRtpConnectionUpdateListener(final OnJingleRtpConnectionUpdate listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            this.onJingleRtpConnectionUpdate.remove(listener);
            remainingListeners = checkListeners();
        }
        if (remainingListeners) {
            switchToBackground();
        }
    }

    public void setOnMucRosterUpdateListener(OnMucRosterUpdate listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            remainingListeners = checkListeners();
            if (!this.mOnMucRosterUpdate.add(listener)) {
                Log.w(
                        Config.LOGTAG,
                        listener.getClass().getName()
                                + " is already registered as OnMucRosterListener");
            }
        }
        if (remainingListeners) {
            switchToForeground();
        }
    }

    public void removeOnMucRosterUpdateListener(final OnMucRosterUpdate listener) {
        final boolean remainingListeners;
        synchronized (LISTENER_LOCK) {
            this.mOnMucRosterUpdate.remove(listener);
            remainingListeners = checkListeners();
        }
        if (remainingListeners) {
            switchToBackground();
        }
    }

    public boolean checkListeners() {
        return (this.mOnAccountUpdates.isEmpty()
                && this.mOnConversationUpdates.isEmpty()
                && this.mOnRosterUpdates.isEmpty()
                && this.mOnCaptchaRequested.isEmpty()
                && this.mOnMucRosterUpdate.isEmpty()
                && this.mOnUpdateBlocklist.isEmpty()
                && this.mOnShowErrorToasts.isEmpty()
                && this.onJingleRtpConnectionUpdate.isEmpty()
                && this.mOnKeyStatusUpdated.isEmpty());
    }

    private void switchToForeground() {
        toggleSoftDisabled(false);
        final boolean broadcastLastActivity = broadcastLastActivity();
        for (Conversation conversation : getConversations()) {
            if (conversation.getMode() == Conversation.MODE_MULTI) {
                conversation.getMucOptions().resetChatState();
            } else {
                conversation.setIncomingChatState(Config.DEFAULT_CHAT_STATE);
            }
        }
        for (Account account : getAccounts()) {
            if (account.getStatus() == Account.State.ONLINE) {
                account.deactivateGracePeriod();
                final XmppConnection connection = account.getXmppConnection();
                if (connection != null) {
                    if (connection.getFeatures().csi()) {
                        connection.sendActive();
                    }
                    if (broadcastLastActivity) {
                        sendPresence(
                                account,
                                false); // send new presence but don't include idle because we are
                        // not
                    }
                }
            }
        }
        Log.d(Config.LOGTAG, "app switched into foreground");
    }

    private void switchToBackground() {
        final boolean broadcastLastActivity = broadcastLastActivity();
        if (broadcastLastActivity) {
            mLastActivity = System.currentTimeMillis();
            final SharedPreferences.Editor editor = getPreferences().edit();
            editor.putLong(SETTING_LAST_ACTIVITY_TS, mLastActivity);
            editor.apply();
        }
        for (Account account : getAccounts()) {
            if (account.getStatus() == Account.State.ONLINE) {
                XmppConnection connection = account.getXmppConnection();
                if (connection != null) {
                    if (broadcastLastActivity) {
                        sendPresence(account, true);
                    }
                    if (connection.getFeatures().csi()) {
                        connection.sendInactive();
                    }
                }
            }
        }
        this.mNotificationService.setIsInForeground(false);
        Log.d(Config.LOGTAG, "app switched into background");
    }

    public void connectMultiModeConversations(Account account) {
        List<Conversation> conversations = getConversations();
        for (Conversation conversation : conversations) {
            if (conversation.getMode() == Conversation.MODE_MULTI
                    && conversation.getAccount() == account) {
                joinMuc(conversation);
            }
        }
    }

    public void mucSelfPingAndRejoin(final Conversation conversation) {
        final Account account = conversation.getAccount();
        synchronized (account.inProgressConferenceJoins) {
            if (account.inProgressConferenceJoins.contains(conversation)) {
                Log.d(
                        Config.LOGTAG,
                        account.getJid().asBareJid()
                                + ": canceling muc self ping because join is already under way");
                return;
            }
        }
        synchronized (account.inProgressConferencePings) {
            if (!account.inProgressConferencePings.add(conversation)) {
                Log.d(
                        Config.LOGTAG,
                        account.getJid().asBareJid()
                                + ": canceling muc self ping because ping is already under way");
                return;
            }
        }
        final Jid self = conversation.getMucOptions().getSelf().getFullJid();
        final Iq ping = new Iq(Iq.Type.GET);
        ping.setTo(self);
        ping.addChild("ping", Namespace.PING);
        sendIqPacket(
                conversation.getAccount(),
                ping,
                (response) -> {
                    if (response.getType() == Iq.Type.ERROR) {
                        final var error = response.getError();
                        if (error == null
                                || error.hasChild("service-unavailable")
                                || error.hasChild("feature-not-implemented")
                                || error.hasChild("item-not-found")) {
                            Log.d(
                                    Config.LOGTAG,
                                    account.getJid().asBareJid()
                                            + ": ping to "
                                            + self
                                            + " came back as ignorable error");
                        } else {
                            Log.d(
                                    Config.LOGTAG,
                                    account.getJid().asBareJid()
                                            + ": ping to "
                                            + self
                                            + " failed. attempting rejoin");
                            joinMuc(conversation);
                        }
                    } else if (response.getType() == Iq.Type.RESULT) {
                        Log.d(
                                Config.LOGTAG,
                                account.getJid().asBareJid()
                                        + ": ping to "
                                        + self
                                        + " came back fine");
                    }
                    synchronized (account.inProgressConferencePings) {
                        account.inProgressConferencePings.remove(conversation);
                    }
                });
    }

    public void joinMuc(Conversation conversation) {
        joinMuc(conversation, null, false);
    }

    public void joinMuc(Conversation conversation, boolean followedInvite) {
        joinMuc(conversation, null, followedInvite);
    }

    private void joinMuc(Conversation conversation, final OnConferenceJoined onConferenceJoined) {
        joinMuc(conversation, onConferenceJoined, false);
    }

    private void joinMuc(
            final Conversation conversation,
            final OnConferenceJoined onConferenceJoined,
            final boolean followedInvite) {
        final Account account = conversation.getAccount();
        synchronized (account.pendingConferenceJoins) {
            account.pendingConferenceJoins.remove(conversation);
        }
        synchronized (account.pendingConferenceLeaves) {
            account.pendingConferenceLeaves.remove(conversation);
        }
        if (account.getStatus() == Account.State.ONLINE) {
            synchronized (account.inProgressConferenceJoins) {
                account.inProgressConferenceJoins.add(conversation);
            }
            if (Config.MUC_LEAVE_BEFORE_JOIN) {
                sendPresencePacket(account, mPresenceGenerator.leave(conversation.getMucOptions()));
            }
            conversation.resetMucOptions();
            if (onConferenceJoined != null) {
                conversation.getMucOptions().flagNoAutoPushConfiguration();
            }
            conversation.setHasMessagesLeftOnServer(false);
            fetchConferenceConfiguration(
                    conversation,
                    new OnConferenceConfigurationFetched() {

                        private void join(Conversation conversation) {
                            Account account = conversation.getAccount();
                            final MucOptions mucOptions = conversation.getMucOptions();

                            if (mucOptions.nonanonymous()
                                    && !mucOptions.membersOnly()
                                    && !conversation.getBooleanAttribute(
                                            "accept_non_anonymous", false)) {
                                synchronized (account.inProgressConferenceJoins) {
                                    account.inProgressConferenceJoins.remove(conversation);
                                }
                                mucOptions.setError(MucOptions.Error.NON_ANONYMOUS);
                                updateConversationUi();
                                if (onConferenceJoined != null) {
                                    onConferenceJoined.onConferenceJoined(conversation);
                                }
                                return;
                            }

                            final Jid joinJid = mucOptions.getSelf().getFullJid();
                            Log.d(
                                    Config.LOGTAG,
                                    account.getJid().asBareJid().toString()
                                            + ": joining conversation "
                                            + joinJid.toString());
                            final var packet =
                                    mPresenceGenerator.selfPresence(
                                            account,
                                            Presence.Status.ONLINE,
                                            mucOptions.nonanonymous()
                                                    || onConferenceJoined != null,
                                            mucOptions.getSelf().getNick());
                            packet.setTo(joinJid);
                            Element x = packet.addChild("x", "http://jabber.org/protocol/muc");
                            if (conversation.getMucOptions().getPassword() != null) {
                                x.addChild("password").setContent(mucOptions.getPassword());
                            }

                            if (mucOptions.mamSupport()) {
                                // Use MAM instead of the limited muc history to get history
                                x.addChild("history").setAttribute("maxchars", "0");
                            } else {
                                // Fallback to muc history
                                x.addChild("history")
                                        .setAttribute(
                                                "since",
                                                PresenceGenerator.getTimestamp(
                                                        conversation
                                                                .getLastMessageTransmitted()
                                                                .getTimestamp()));
                            }
                            sendPresencePacket(account, packet);
                            if (onConferenceJoined != null) {
                                onConferenceJoined.onConferenceJoined(conversation);
                            }
                            if (!joinJid.equals(conversation.getJid())) {
                                conversation.setContactJid(joinJid);
                                databaseBackend.updateConversation(conversation);
                            }

                            maybeRegisterWithMuc(conversation, null);

                            if (mucOptions.mamSupport()) {
                                getMessageArchiveService().catchupMUC(conversation);
                            }
                            fetchConferenceMembers(conversation);
                            if (mucOptions.isPrivateAndNonAnonymous()) {
                                if (followedInvite) {
                                    final Bookmark bookmark = conversation.getBookmark();
                                    if (bookmark != null) {
                                        if (!bookmark.autojoin()) {
                                            bookmark.setAutojoin(true);
                                            createBookmark(account, bookmark);
                                        }
                                    } else {
                                        saveConversationAsBookmark(conversation, null);
                                    }
                                }
                            }
                            synchronized (account.inProgressConferenceJoins) {
                                account.inProgressConferenceJoins.remove(conversation);
                                sendUnsentMessages(conversation);
                            }
                        }

                        @Override
                        public void onConferenceConfigurationFetched(Conversation conversation) {
                            if (conversation.getStatus() == Conversation.STATUS_ARCHIVED) {
                                Log.d(
                                        Config.LOGTAG,
                                        account.getJid().asBareJid()
                                                + ": conversation ("
                                                + conversation.getJid()
                                                + ") got archived before IQ result");
                                return;
                            }
                            join(conversation);
                        }

                        @Override
                        public void onFetchFailed(
                                final Conversation conversation, final String errorCondition) {
                            if (conversation.getStatus() == Conversation.STATUS_ARCHIVED) {
                                Log.d(
                                        Config.LOGTAG,
                                        account.getJid().asBareJid()
                                                + ": conversation ("
                                                + conversation.getJid()
                                                + ") got archived before IQ result");
                                return;
                            }
                            if ("remote-server-not-found".equals(errorCondition)) {
                                synchronized (account.inProgressConferenceJoins) {
                                    account.inProgressConferenceJoins.remove(conversation);
                                }
                                conversation
                                        .getMucOptions()
                                        .setError(MucOptions.Error.SERVER_NOT_FOUND);
                                updateConversationUi();
                            } else {
                                join(conversation);
                                fetchConferenceConfiguration(conversation);
                            }
                        }
                    });
            updateConversationUi();
        } else {
            synchronized (account.pendingConferenceJoins) {
                account.pendingConferenceJoins.add(conversation);
            }
            conversation.resetMucOptions();
            conversation.setHasMessagesLeftOnServer(false);
            updateConversationUi();
        }
    }

    private void fetchConferenceMembers(final Conversation conversation) {
        final Account account = conversation.getAccount();
        final AxolotlService axolotlService = account.getAxolotlService();
        final var affiliations = new ArrayList<String>();
        affiliations.add("outcast");
        if (conversation.getMucOptions().isPrivateAndNonAnonymous()) affiliations.addAll(List.of("member", "admin", "owner"));
        final Consumer<Iq> callback =
                new Consumer<Iq>() {

                    private int i = 0;
                    private boolean success = true;

                    @Override
                    public void accept(Iq response) {
                        final boolean omemoEnabled =
                                conversation.getNextEncryption() == Message.ENCRYPTION_AXOLOTL;
                        Element query = response.query("http://jabber.org/protocol/muc#admin");
                        if (response.getType() == Iq.Type.RESULT && query != null) {
                            for (Element child : query.getChildren()) {
                                if ("item".equals(child.getName())) {
                                    MucOptions.User user =
                                            AbstractParser.parseItem(conversation, child);
                                    user.setOnline(false);
                                    if (!user.realJidMatchesAccount()) {
                                        boolean isNew =
                                                conversation.getMucOptions().updateUser(user);
                                        Contact contact = user.getContact();
                                        if (omemoEnabled
                                                && isNew
                                                && user.getRealJid() != null
                                                && (contact == null
                                                        || !contact.mutualPresenceSubscription())
                                                && axolotlService.hasEmptyDeviceList(
                                                        user.getRealJid())) {
                                            axolotlService.fetchDeviceIds(user.getRealJid());
                                        }
                                    }
                                }
                            }
                        } else {
                            success = false;
                            Log.d(
                                    Config.LOGTAG,
                                    account.getJid().asBareJid()
                                            + ": could not request affiliation "
                                            + affiliations.get(i)
                                            + " in "
                                            + conversation.getJid().asBareJid());
                        }
                        ++i;
                        if (i >= affiliations.size()) {
                            final var mucOptions = conversation.getMucOptions();
                            List<Jid> members = mucOptions.getMembers(true);
                            if (success) {
                                List<Jid> cryptoTargets = conversation.getAcceptedCryptoTargets();
                                boolean changed = false;
                                for (ListIterator<Jid> iterator = cryptoTargets.listIterator();
                                        iterator.hasNext(); ) {
                                    Jid jid = iterator.next();
                                    if (!members.contains(jid)
                                            && !members.contains(jid.getDomain())) {
                                        iterator.remove();
                                        Log.d(
                                                Config.LOGTAG,
                                                account.getJid().asBareJid()
                                                        + ": removed "
                                                        + jid
                                                        + " from crypto targets of "
                                                        + conversation.getName());
                                        changed = true;
                                    }
                                }
                                if (changed) {
                                    conversation.setAcceptedCryptoTargets(cryptoTargets);
                                    updateConversation(conversation);
                                }
                            }
                            getAvatarService().clear(mucOptions);
                            updateMucRosterUi();
                            updateConversationUi();
                        }
                    }
                };
        for (String affiliation : affiliations) {
            sendIqPacket(
                    account, mIqGenerator.queryAffiliation(conversation, affiliation), callback);
        }
        Log.d(
                Config.LOGTAG,
                account.getJid().asBareJid() + ": fetching members for " + conversation.getName());
    }

    public void providePasswordForMuc(final Conversation conversation, final String password) {
        if (conversation.getMode() == Conversation.MODE_MULTI) {
            conversation.getMucOptions().setPassword(password);
            if (conversation.getBookmark() != null) {
                final Bookmark bookmark = conversation.getBookmark();
                bookmark.setAutojoin(true);
                createBookmark(conversation.getAccount(), bookmark);
            }
            updateConversation(conversation);
            joinMuc(conversation);
        }
    }

    public void deleteAvatar(final Account account) {
        final AtomicBoolean executed = new AtomicBoolean(false);
        final Runnable onDeleted =
                () -> {
                    if (executed.compareAndSet(false, true)) {
                        account.setAvatar(null);
                        databaseBackend.updateAccount(account);
                        getAvatarService().clear(account);
                        updateAccountUi();
                    }
                };
        deleteVcardAvatar(account, onDeleted);
        deletePepNode(account, Namespace.AVATAR_DATA);
        deletePepNode(account, Namespace.AVATAR_METADATA, onDeleted);
    }

    public void deletePepNode(final Account account, final String node) {
        deletePepNode(account, node, null);
    }

    private void deletePepNode(final Account account, final String node, final Runnable runnable) {
        final Iq request = mIqGenerator.deleteNode(node);
        sendIqPacket(
                account,
                request,
                (packet) -> {
                    if (packet.getType() == Iq.Type.RESULT) {
                        Log.d(
                                Config.LOGTAG,
                                account.getJid().asBareJid()
                                        + ": successfully deleted pep node "
                                        + node);
                        if (runnable != null) {
                            runnable.run();
                        }
                    } else {
                        Log.d(
                                Config.LOGTAG,
                                account.getJid().asBareJid() + ": failed to delete " + packet);
                    }
                });
    }

    private void deleteVcardAvatar(final Account account, @NonNull final Runnable runnable) {
        final Iq retrieveVcard = mIqGenerator.retrieveVcardAvatar(account.getJid().asBareJid());
        sendIqPacket(
                account,
                retrieveVcard,
                (response) -> {
                    if (response.getType() != Iq.Type.RESULT) {
                        Log.d(
                                Config.LOGTAG,
                                account.getJid().asBareJid() + ": no vCard set. nothing to do");
                        return;
                    }
                    final Element vcard = response.findChild("vCard", "vcard-temp");
                    if (vcard == null) {
                        Log.d(
                                Config.LOGTAG,
                                account.getJid().asBareJid() + ": no vCard set. nothing to do");
                        return;
                    }
                    Element photo = vcard.findChild("PHOTO");
                    if (photo == null) {
                        photo = vcard.addChild("PHOTO");
                    }
                    photo.clearChildren();
                    final Iq publication = new Iq(Iq.Type.SET);
                    publication.setTo(account.getJid().asBareJid());
                    publication.addChild(vcard);
                    sendIqPacket(
                            account,
                            publication,
                            (publicationResponse) -> {
                                if (publicationResponse.getType() == Iq.Type.RESULT) {
                                    Log.d(
                                            Config.LOGTAG,
                                            account.getJid().asBareJid()
                                                    + ": successfully deleted vcard avatar");
                                    runnable.run();
                                } else {
                                    Log.d(
                                            Config.LOGTAG,
                                            "failed to publish vcard "
                                                    + publicationResponse.getErrorCondition());
                                }
                            });
                });
    }

    private boolean hasEnabledAccounts() {
        if (this.accounts == null) {
            return false;
        }
        for (final Account account : this.accounts) {
            if (account.isConnectionEnabled()) {
                return true;
            }
        }
        return false;
    }

    public void getAttachments(
            final Conversation conversation, int limit, final OnMediaLoaded onMediaLoaded) {
        getAttachments(
                conversation.getAccount(), conversation.getJid().asBareJid(), limit, onMediaLoaded);
    }

    public void getAttachments(
            final Account account,
            final Jid jid,
            final int limit,
            final OnMediaLoaded onMediaLoaded) {
        getAttachments(account.getUuid(), jid.asBareJid(), limit, onMediaLoaded);
    }

    public void getAttachments(
            final String account,
            final Jid jid,
            final int limit,
            final OnMediaLoaded onMediaLoaded) {
        new Thread(
                        () ->
                                onMediaLoaded.onMediaLoaded(
                                        fileBackend.convertToAttachments(
                                                databaseBackend.getRelativeFilePaths(
                                                        account, jid, limit))))
                .start();
    }

    public void persistSelfNick(final MucOptions.User self, final boolean modified) {
        final Conversation conversation = self.getConversation();
        final Account account = conversation.getAccount();
        final Jid full = self.getFullJid();
        if (!full.equals(conversation.getJid())) {
            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": persisting full jid " + full);
            conversation.setContactJid(full);
            databaseBackend.updateConversation(conversation);
        }

        final String nick = self.getNick();
        final Bookmark bookmark = conversation.getBookmark();
        if (bookmark == null || !modified) {
            return;
        }
        final String defaultNick = MucOptions.defaultNick(account);
        if (nick.equals(defaultNick) || nick.equals(bookmark.getNick())) {
            return;
        }
        Log.d(
                Config.LOGTAG,
                account.getJid().asBareJid()
                        + ": persist nick '"
                        + full.getResource()
                        + "' into bookmark for "
                        + conversation.getJid().asBareJid());
        bookmark.setNick(nick);
        createBookmark(bookmark.getAccount(), bookmark);
    }

    public void presenceToMuc(final Conversation conversation) {
        final MucOptions options = conversation.getMucOptions();
        if (options.online()) {
            Account account = conversation.getAccount();
            final Jid joinJid = options.getSelf().getFullJid();
            final var packet = mPresenceGenerator.selfPresence(account, Presence.Status.ONLINE, options.nonanonymous(), options.getSelf().getNick());
            packet.setTo(joinJid);
            sendPresencePacket(account, packet);
        }
    }

    public boolean renameInMuc(
            final Conversation conversation,
            final String nick,
            final UiCallback<Conversation> callback) {
        final Account account = conversation.getAccount();
        final Bookmark bookmark = conversation.getBookmark();
        final MucOptions options = conversation.getMucOptions();
        final Jid joinJid = options.createJoinJid(nick);
        if (joinJid == null) {
            return false;
        }
        if (options.online()) {
            maybeRegisterWithMuc(conversation, nick);
            options.setOnRenameListener(
                    new OnRenameListener() {

                        @Override
                        public void onSuccess() {
                            final var packet = mPresenceGenerator.selfPresence(account, Presence.Status.ONLINE, options.nonanonymous(), nick);
                            packet.setTo(joinJid);
                            sendPresencePacket(account, packet);
                            callback.success(conversation);
                        }

                        @Override
                        public void onFailure() {
                            callback.error(R.string.nick_in_use, conversation);
                        }
                    });

            final var packet =
                    mPresenceGenerator.selfPresence(
                            account, Presence.Status.ONLINE, options.nonanonymous(), nick);
            packet.setTo(joinJid);
            sendPresencePacket(account, packet);
            if (nick.equals(MucOptions.defaultNick(account))
                    && bookmark != null
                    && bookmark.getNick() != null) {
                Log.d(
                        Config.LOGTAG,
                        account.getJid().asBareJid()
                                + ": removing nick from bookmark for "
                                + bookmark.getJid());
                bookmark.setNick(null);
                createBookmark(account, bookmark);
            }
        } else {
            conversation.setContactJid(joinJid);
            databaseBackend.updateConversation(conversation);
            if (account.getStatus() == Account.State.ONLINE) {
                if (bookmark != null) {
                    bookmark.setNick(nick);
                    createBookmark(account, bookmark);
                }
                joinMuc(conversation);
            }
        }
        return true;
    }

    public void checkMucRequiresRename() {
        synchronized (this.conversations) {
            for (final Conversation conversation : this.conversations) {
                if (conversation.getMode() == Conversational.MODE_MULTI) {
                    checkMucRequiresRename(conversation);
                }
            }
        }
    }

    private void checkMucRequiresRename(final Conversation conversation) {
        final var options = conversation.getMucOptions();
        if (!options.online()) {
            return;
        }
        final var account = conversation.getAccount();
        final String current = options.getActualNick();
        final String proposed = options.getProposedNickPure();
        if (current == null || current.equals(proposed)) {
            return;
        }
        final Jid joinJid = options.createJoinJid(proposed);
        Log.d(
                Config.LOGTAG,
                String.format(
                        "%s: muc rename required %s (was: %s)",
                        account.getJid().asBareJid(), joinJid, current));
        final var packet =
                mPresenceGenerator.selfPresence(
                        account, Presence.Status.ONLINE, options.nonanonymous(), proposed);
        packet.setTo(joinJid);
        sendPresencePacket(account, packet);
    }

    public void leaveMuc(Conversation conversation) {
        leaveMuc(conversation, false);
    }

    private void leaveMuc(Conversation conversation, boolean now) {
        final Account account = conversation.getAccount();
        synchronized (account.pendingConferenceJoins) {
            account.pendingConferenceJoins.remove(conversation);
        }
        synchronized (account.pendingConferenceLeaves) {
            account.pendingConferenceLeaves.remove(conversation);
        }
        if (account.getStatus() == Account.State.ONLINE || now) {
            sendPresencePacket(
                    conversation.getAccount(),
                    mPresenceGenerator.leave(conversation.getMucOptions()));
            conversation.getMucOptions().setOffline();
            Bookmark bookmark = conversation.getBookmark();
            if (bookmark != null) {
                bookmark.setConversation(null);
            }
            Log.d(
                    Config.LOGTAG,
                    conversation.getAccount().getJid().asBareJid()
                            + ": leaving muc "
                            + conversation.getJid());
        } else {
            synchronized (account.pendingConferenceLeaves) {
                account.pendingConferenceLeaves.add(conversation);
            }
        }
    }

    public String findConferenceServer(final Account account) {
        String server;
        if (account.getXmppConnection() != null) {
            server = account.getXmppConnection().getMucServer();
            if (server != null) {
                return server;
            }
        }
        for (Account other : getAccounts()) {
            if (other != account && other.getXmppConnection() != null) {
                server = other.getXmppConnection().getMucServer();
                if (server != null) {
                    return server;
                }
            }
        }
        return null;
    }

    public void createPublicChannel(
            final Account account,
            final String name,
            final Jid address,
            final UiCallback<Conversation> callback) {
        joinMuc(
                findOrCreateConversation(account, address, true, false, true),
                conversation -> {
                    final Bundle configuration = IqGenerator.defaultChannelConfiguration();
                    if (!TextUtils.isEmpty(name)) {
                        configuration.putString("muc#roomconfig_roomname", name);
                    }
                    pushConferenceConfiguration(
                            conversation,
                            configuration,
                            new OnConfigurationPushed() {
                                @Override
                                public void onPushSucceeded() {
                                    saveConversationAsBookmark(conversation, name);
                                    callback.success(conversation);
                                }

                                @Override
                                public void onPushFailed() {
                                    if (conversation
                                            .getMucOptions()
                                            .getSelf()
                                            .getAffiliation()
                                            .ranks(MucOptions.Affiliation.OWNER)) {
                                        callback.error(
                                                R.string.unable_to_set_channel_configuration,
                                                conversation);
                                    } else {
                                        callback.error(
                                                R.string.joined_an_existing_channel, conversation);
                                    }
                                }
                            });
                });
    }

    public boolean createAdhocConference(
            final Account account,
            final String name,
            final Iterable<Jid> jids,
            final UiCallback<Conversation> callback) {
        Log.d(
                Config.LOGTAG,
                account.getJid().asBareJid().toString()
                        + ": creating adhoc conference with "
                        + jids.toString());
        if (account.getStatus() == Account.State.ONLINE) {
            try {
                String server = findConferenceServer(account);
                if (server == null) {
                    if (callback != null) {
                        callback.error(R.string.no_conference_server_found, null);
                    }
                    return false;
                }
                final Jid jid = Jid.of(CryptoHelper.pronounceable(), server, null);
                final Conversation conversation =
                        findOrCreateConversation(account, jid, true, false, true);
                joinMuc(
                        conversation,
                        new OnConferenceJoined() {
                            @Override
                            public void onConferenceJoined(final Conversation conversation) {
                                final Bundle configuration =
                                        IqGenerator.defaultGroupChatConfiguration();
                                if (!TextUtils.isEmpty(name)) {
                                    configuration.putString("muc#roomconfig_roomname", name);
                                }
                                pushConferenceConfiguration(
                                        conversation,
                                        configuration,
                                        new OnConfigurationPushed() {
                                            @Override
                                            public void onPushSucceeded() {
                                                for (Jid invite : jids) {
                                                    invite(conversation, invite);
                                                }
                                                for (String resource :
                                                        account.getSelfContact()
                                                                .getPresences()
                                                                .toResourceArray()) {
                                                    Jid other =
                                                            account.getJid().withResource(resource);
                                                    Log.d(
                                                            Config.LOGTAG,
                                                            account.getJid().asBareJid()
                                                                    + ": sending direct invite to "
                                                                    + other);
                                                    directInvite(conversation, other);
                                                }
                                                saveConversationAsBookmark(conversation, name);
                                                if (callback != null) {
                                                    callback.success(conversation);
                                                }
                                            }

                                            @Override
                                            public void onPushFailed() {
                                                archiveConversation(conversation);
                                                if (callback != null) {
                                                    callback.error(
                                                            R.string.conference_creation_failed,
                                                            conversation);
                                                }
                                            }
                                        });
                            }
                        });
                return true;
            } catch (IllegalArgumentException e) {
                if (callback != null) {
                    callback.error(R.string.conference_creation_failed, null);
                }
                return false;
            }
        } else {
            if (callback != null) {
                callback.error(R.string.not_connected_try_again, null);
            }
            return false;
        }
    }

    public void checkIfMuc(final Account account, final Jid jid, Consumer<Boolean> cb) {
        if (jid.isDomainJid()) {
            // Spec basically says MUC needs to have a node
            // And also specifies that MUC and MUC service should have the same identity...
            cb.accept(false);
            return;
        }

        final var request = mIqGenerator.queryDiscoInfo(jid.asBareJid());
        sendIqPacket(account, request, (reply) -> {
            final var result = new ServiceDiscoveryResult(reply);
            cb.accept(
                result.getFeatures().contains("http://jabber.org/protocol/muc") &&
                result.hasIdentity("conference", null)
            );
        });
    }

    public void fetchConferenceConfiguration(final Conversation conversation) {
        fetchConferenceConfiguration(conversation, null);
    }

    public void fetchConferenceConfiguration(
            final Conversation conversation, final OnConferenceConfigurationFetched callback) {
        final Iq request = mIqGenerator.queryDiscoInfo(conversation.getJid().asBareJid());
        final var account = conversation.getAccount();
        sendIqPacket(
                account,
                request,
                response -> {
                    if (response.getType() == Iq.Type.RESULT) {
                        final MucOptions mucOptions = conversation.getMucOptions();
                        final Bookmark bookmark = conversation.getBookmark();
                        final boolean sameBefore =
                                StringUtils.equals(
                                        bookmark == null ? null : bookmark.getBookmarkName(),
                                        mucOptions.getName());

                        final var hadOccupantId = mucOptions.occupantId();
                        if (mucOptions.updateConfiguration(new ServiceDiscoveryResult(response))) {
                            Log.d(
                                    Config.LOGTAG,
                                    account.getJid().asBareJid()
                                            + ": muc configuration changed for "
                                            + conversation.getJid().asBareJid());
                            updateConversation(conversation);
                        }

                        final var hasOccupantId = mucOptions.occupantId();

                        if (!hadOccupantId && hasOccupantId && mucOptions.online()) {
                            final var me = mucOptions.getSelf().getFullJid();
                            Log.d(
                                    Config.LOGTAG,
                                    account.getJid().asBareJid()
                                            + ": gained support for occupant-id in "
                                            + me
                                            + ". resending presence");
                            final var packet =
                                    mPresenceGenerator.selfPresence(
                                            account,
                                            Presence.Status.ONLINE,
                                            mucOptions.nonanonymous(), mucOptions.getSelf().getNick());
                            packet.setTo(me);
                            sendPresencePacket(account, packet);
                        }

                        if (bookmark != null
                                && (sameBefore || bookmark.getBookmarkName() == null)) {
                            if (bookmark.setBookmarkName(
                                    StringUtils.nullOnEmpty(mucOptions.getName()))) {
                                createBookmark(account, bookmark);
                            }
                        }

                        if (callback != null) {
                            callback.onConferenceConfigurationFetched(conversation);
                        }

                        updateConversationUi();
                    } else if (response.getType() == Iq.Type.TIMEOUT) {
                        Log.d(
                                Config.LOGTAG,
                                account.getJid().asBareJid()
                                        + ": received timeout waiting for conference configuration"
                                        + " fetch");
                    } else {
                        if (callback != null) {
                            callback.onFetchFailed(conversation, response.getErrorCondition());
                        }
                    }
                });
    }

    public void pushNodeConfiguration(
            Account account,
            final String node,
            final Bundle options,
            final OnConfigurationPushed callback) {
        pushNodeConfiguration(account, account.getJid().asBareJid(), node, options, callback);
    }

    public void pushNodeConfiguration(
            Account account,
            final Jid jid,
            final String node,
            final Bundle options,
            final OnConfigurationPushed callback) {
        Log.d(Config.LOGTAG, "pushing node configuration");
        sendIqPacket(
                account,
                mIqGenerator.requestPubsubConfiguration(jid, node),
                responseToRequest -> {
                    if (responseToRequest.getType() == Iq.Type.RESULT) {
                        Element pubsub =
                                responseToRequest.findChild(
                                        "pubsub", "http://jabber.org/protocol/pubsub#owner");
                        Element configuration =
                                pubsub == null ? null : pubsub.findChild("configure");
                        Element x =
                                configuration == null
                                        ? null
                                        : configuration.findChild("x", Namespace.DATA);
                        if (x != null) {
                            final Data data = Data.parse(x);
                            data.submit(options);
                            sendIqPacket(
                                    account,
                                    mIqGenerator.publishPubsubConfiguration(jid, node, data),
                                    responseToPublish -> {
                                        if (responseToPublish.getType() == Iq.Type.RESULT
                                                && callback != null) {
                                            Log.d(
                                                    Config.LOGTAG,
                                                    account.getJid().asBareJid()
                                                            + ": successfully changed node"
                                                            + " configuration for node "
                                                            + node);
                                            callback.onPushSucceeded();
                                        } else if (responseToPublish.getType() == Iq.Type.ERROR
                                                && callback != null) {
                                            callback.onPushFailed();
                                        }
                                    });
                        } else if (callback != null) {
                            callback.onPushFailed();
                        }
                    } else if (responseToRequest.getType() == Iq.Type.ERROR && callback != null) {
                        callback.onPushFailed();
                    }
                });
    }

    public void pushConferenceConfiguration(
            final Conversation conversation,
            final Bundle options,
            final OnConfigurationPushed callback) {
        if (options.getString("muc#roomconfig_whois", "moderators").equals("anyone")) {
            conversation.setAttribute("accept_non_anonymous", true);
            updateConversation(conversation);
        }
        if (options.containsKey("muc#roomconfig_moderatedroom")) {
            final boolean moderated = "1".equals(options.getString("muc#roomconfig_moderatedroom"));
            options.putString("members_by_default", moderated ? "0" : "1");
        }
        if (options.containsKey("muc#roomconfig_allowpm")) {
            // ejabberd :-/
            final boolean allow = "anyone".equals(options.getString("muc#roomconfig_allowpm"));
            options.putString("allow_private_messages", allow ? "1" : "0");
            options.putString("allow_private_messages_from_visitors", allow ? "anyone" : "nobody");
        }
        final var account = conversation.getAccount();
        final Iq request = new Iq(Iq.Type.GET);
        request.setTo(conversation.getJid().asBareJid());
        request.query("http://jabber.org/protocol/muc#owner");
        sendIqPacket(
                account,
                request,
                response -> {
                    if (response.getType() == Iq.Type.RESULT) {
                        final Data data =
                                Data.parse(response.query().findChild("x", Namespace.DATA));
                        data.submit(options);
                        final Iq set = new Iq(Iq.Type.SET);
                        set.setTo(conversation.getJid().asBareJid());
                        set.query("http://jabber.org/protocol/muc#owner").addChild(data);
                        sendIqPacket(
                                account,
                                set,
                                packet -> {
                                    if (callback != null) {
                                        if (packet.getType() == Iq.Type.RESULT) {
                                            callback.onPushSucceeded();
                                        } else {
                                            Log.d(Config.LOGTAG, "failed: " + packet.toString());
                                            callback.onPushFailed();
                                        }
                                    }
                                });
                    } else {
                        if (callback != null) {
                            callback.onPushFailed();
                        }
                    }
                });
    }

    public void pushSubjectToConference(final Conversation conference, final String subject) {
        final var packet =
                this.getMessageGenerator()
                        .conferenceSubject(conference, StringUtils.nullOnEmpty(subject));
        this.sendMessagePacket(conference.getAccount(), packet);
    }

    public void requestVoice(final Account account, final Jid jid) {
        final var packet = this.getMessageGenerator().requestVoice(jid);
        this.sendMessagePacket(account, packet);
    }

    public void changeAffiliationInConference(
            final Conversation conference,
            Jid user,
            final MucOptions.Affiliation affiliation,
            final OnAffiliationChanged callback) {
        final Jid jid = user.asBareJid();
        final Iq request =
                this.mIqGenerator.changeAffiliation(conference, jid, affiliation.toString());
        sendIqPacket(
                conference.getAccount(),
                request,
                (response) -> {
                    if (response.getType() == Iq.Type.RESULT) {
                        final var mucOptions = conference.getMucOptions();
                        mucOptions.changeAffiliation(jid, affiliation);
                        getAvatarService().clear(mucOptions);
                        if (callback != null) {
                            callback.onAffiliationChangedSuccessful(jid);
                        } else {
                            Log.d(
                                    Config.LOGTAG,
                                    "changed affiliation of " + user + " to " + affiliation);
                        }
                    } else if (callback != null) {
                        callback.onAffiliationChangeFailed(
                                jid, R.string.could_not_change_affiliation);
                    } else {
                        Log.d(Config.LOGTAG, "unable to change affiliation");
                    }
                });
    }

    public void changeRoleInConference(
            final Conversation conference, final String nick, MucOptions.Role role) {
        final var account = conference.getAccount();
        final Iq request = this.mIqGenerator.changeRole(conference, nick, role.toString());
        sendIqPacket(
                account,
                request,
                (packet) -> {
                    if (packet.getType() != Iq.Type.RESULT) {
                        Log.d(
                                Config.LOGTAG,
                                account.getJid().asBareJid() + " unable to change role of " + nick);
                    }
                });
    }

    public void moderateMessage(final Account account, final Message m, final String reason) {
        final var request = this.mIqGenerator.moderateMessage(account, m, reason);
        sendIqPacket(account, request, (packet) -> {
            if (packet.getType() != Iq.Type.RESULT) {
                showErrorToastInUi(R.string.unable_to_moderate);
                Log.d(Config.LOGTAG, account.getJid().asBareJid() + " unable to moderate: " + packet);
            }
        });
    }

    public void destroyRoom(final Conversation conversation, final OnRoomDestroy callback) {
        final Iq request = new Iq(Iq.Type.SET);
        request.setTo(conversation.getJid().asBareJid());
        request.query("http://jabber.org/protocol/muc#owner").addChild("destroy");
        sendIqPacket(
                conversation.getAccount(),
                request,
                response -> {
                    if (response.getType() == Iq.Type.RESULT) {
                        if (callback != null) {
                            callback.onRoomDestroySucceeded();
                        }
                    } else if (response.getType() == Iq.Type.ERROR) {
                        if (callback != null) {
                            callback.onRoomDestroyFailed();
                        }
                    }
                });
    }

    private void disconnect(final Account account, boolean force) {
        final XmppConnection connection = account.getXmppConnection();
        if (connection == null) {
            return;
        }
        if (!force) {
            final List<Conversation> conversations = getConversations();
            for (Conversation conversation : conversations) {
                if (conversation.getAccount() == account) {
                    if (conversation.getMode() == Conversation.MODE_MULTI) {
                        leaveMuc(conversation, true);
                    }
                }
            }
            sendOfflinePresence(account);
        }
        connection.disconnect(force);
    }

    @Override
    public IBinder onBind(Intent intent) {
        return mBinder;
    }

    public void deleteMessage(Message message) {
        mScheduledMessages.remove(message.getUuid());
        databaseBackend.deleteMessage(message.getUuid());
        ((Conversation) message.getConversation()).remove(message);
        updateConversationUi();
    }

    public void updateMessage(Message message) {
        updateMessage(message, true);
    }

    public void updateMessage(Message message, boolean includeBody) {
        databaseBackend.updateMessage(message, includeBody);
        updateConversationUi();
    }

    public void createMessageAsync(final Message message) {
        mDatabaseWriterExecutor.execute(() -> databaseBackend.createMessage(message));
    }

    public void updateMessage(Message message, String uuid) {
        if (!databaseBackend.updateMessage(message, uuid)) {
            Log.e(Config.LOGTAG, "error updated message in DB after edit");
        }
        updateConversationUi();
    }

    public void syncDirtyContacts(Account account) {
        for (Contact contact : account.getRoster().getContacts()) {
            if (contact.getOption(Contact.Options.DIRTY_PUSH)) {
                pushContactToServer(contact);
            }
            if (contact.getOption(Contact.Options.DIRTY_DELETE)) {
                deleteContactOnServer(contact);
            }
        }
    }

    protected void unregisterPhoneAccounts(final Account account) {
        for (final Contact contact : account.getRoster().getContacts()) {
            if (!contact.showInRoster()) {
                contact.unregisterAsPhoneAccount(this);
            }
        }
    }

    public void createContact(final Contact contact, final boolean autoGrant) {
        createContact(contact, autoGrant, null);
    }

    public void createContact(
            final Contact contact, final boolean autoGrant, final String preAuth) {
        if (autoGrant) {
            contact.setOption(Contact.Options.PREEMPTIVE_GRANT);
            contact.setOption(Contact.Options.ASKING);
        }
        pushContactToServer(contact, preAuth);
    }

    public void pushContactToServer(final Contact contact) {
        pushContactToServer(contact, null);
    }

    private void pushContactToServer(final Contact contact, final String preAuth) {
        contact.resetOption(Contact.Options.DIRTY_DELETE);
        contact.setOption(Contact.Options.DIRTY_PUSH);
        final Account account = contact.getAccount();
        if (account.getStatus() == Account.State.ONLINE) {
            final boolean ask = contact.getOption(Contact.Options.ASKING);
            final boolean sendUpdates =
                    contact.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)
                            && contact.getOption(Contact.Options.PREEMPTIVE_GRANT);
            final Iq iq = new Iq(Iq.Type.SET);
            iq.query(Namespace.ROSTER).addChild(contact.asElement());
            account.getXmppConnection().sendIqPacket(iq, mDefaultIqHandler);
            if (sendUpdates) {
                sendPresencePacket(account, mPresenceGenerator.sendPresenceUpdatesTo(contact));
            }
            if (ask) {
                sendPresencePacket(
                        account, mPresenceGenerator.requestPresenceUpdatesFrom(contact, preAuth));
            }
        } else {
            syncRoster(contact.getAccount());
        }
    }

    public void publishMucAvatar(
            final Conversation conversation, final Uri image, final OnAvatarPublication callback) {
        new Thread(
                        () -> {
                            final Bitmap.CompressFormat format = Config.AVATAR_FORMAT;
                            final int size = Config.AVATAR_SIZE;
                            final Avatar avatar =
                                    getFileBackend().getPepAvatar(image, size, format);
                            if (avatar != null) {
                                if (!getFileBackend().save(avatar)) {
                                    callback.onAvatarPublicationFailed(
                                            R.string.error_saving_avatar);
                                    return;
                                }
                                avatar.owner = conversation.getJid().asBareJid();
                                publishMucAvatar(conversation, avatar, callback);
                            } else {
                                callback.onAvatarPublicationFailed(
                                        R.string.error_publish_avatar_converting);
                            }
                        })
                .start();
    }

    public void publishAvatarAsync(
            final Account account,
            final Uri image,
            final boolean open,
            final OnAvatarPublication callback) {
        new Thread(() -> publishAvatar(account, image, open, callback)).start();
    }

    private void publishAvatar(
            final Account account,
            final Uri image,
            final boolean open,
            final OnAvatarPublication callback) {
        final Bitmap.CompressFormat format = Config.AVATAR_FORMAT;
        final int size = Config.AVATAR_SIZE;
        final Avatar avatar = getFileBackend().getPepAvatar(image, size, format);
        if (avatar != null) {
            if (!getFileBackend().save(avatar)) {
                Log.d(Config.LOGTAG, "unable to save vcard");
                callback.onAvatarPublicationFailed(R.string.error_saving_avatar);
                return;
            }
            publishAvatar(account, avatar, open, callback);
        } else {
            callback.onAvatarPublicationFailed(R.string.error_publish_avatar_converting);
        }
    }

    private void publishMucAvatar(
            Conversation conversation, Avatar avatar, OnAvatarPublication callback) {
        final var account = conversation.getAccount();
        final Iq retrieve = mIqGenerator.retrieveVcardAvatar(avatar);
        sendIqPacket(
                account,
                retrieve,
                (response) -> {
                    boolean itemNotFound =
                            response.getType() == Iq.Type.ERROR
                                    && response.hasChild("error")
                                    && response.findChild("error").hasChild("item-not-found");
                    if (response.getType() == Iq.Type.RESULT || itemNotFound) {
                        Element vcard = response.findChild("vCard", "vcard-temp");
                        if (vcard == null) {
                            vcard = new Element("vCard", "vcard-temp");
                        }
                        Element photo = vcard.findChild("PHOTO");
                        if (photo == null) {
                            photo = vcard.addChild("PHOTO");
                        }
                        photo.clearChildren();
                        photo.addChild("TYPE").setContent(avatar.type);
                        photo.addChild("BINVAL").setContent(avatar.image);
                        final Iq publication = new Iq(Iq.Type.SET);
                        publication.setTo(conversation.getJid().asBareJid());
                        publication.addChild(vcard);
                        sendIqPacket(
                                account,
                                publication,
                                (publicationResponse) -> {
                                    if (publicationResponse.getType() == Iq.Type.RESULT) {
                                        callback.onAvatarPublicationSucceeded();
                                    } else {
                                        Log.d(
                                                Config.LOGTAG,
                                                "failed to publish vcard "
                                                        + publicationResponse.getErrorCondition());
                                        callback.onAvatarPublicationFailed(
                                                R.string.error_publish_avatar_server_reject);
                                    }
                                });
                    } else {
                        Log.d(Config.LOGTAG, "failed to request vcard " + response);
                        callback.onAvatarPublicationFailed(
                                R.string.error_publish_avatar_no_server_support);
                    }
                });
    }

    public void publishAvatar(
            final Account account,
            final Avatar avatar,
            final boolean open,
            final OnAvatarPublication callback) {
        final Bundle options;
        if (account.getXmppConnection().getFeatures().pepPublishOptions()) {
            options = open ? PublishOptions.openAccess() : PublishOptions.presenceAccess();
        } else {
            options = null;
        }
        publishAvatar(account, avatar, options, true, callback);
    }

    public void publishAvatar(
            Account account,
            final Avatar avatar,
            final Bundle options,
            final boolean retry,
            final OnAvatarPublication callback) {
        Log.d(
                Config.LOGTAG,
                account.getJid().asBareJid() + ": publishing avatar. options=" + options);
        final Iq packet = this.mIqGenerator.publishAvatar(avatar, options);
        this.sendIqPacket(
                account,
                packet,
                result -> {
                    if (result.getType() == Iq.Type.RESULT) {
                        publishAvatarMetadata(account, avatar, options, true, callback);
                    } else if (retry && PublishOptions.preconditionNotMet(result)) {
                        pushNodeConfiguration(
                                account,
                                Namespace.AVATAR_DATA,
                                options,
                                new OnConfigurationPushed() {
                                    @Override
                                    public void onPushSucceeded() {
                                        Log.d(
                                                Config.LOGTAG,
                                                account.getJid().asBareJid()
                                                        + ": changed node configuration for avatar"
                                                        + " node");
                                        publishAvatar(account, avatar, options, false, callback);
                                    }

                                    @Override
                                    public void onPushFailed() {
                                        Log.d(
                                                Config.LOGTAG,
                                                account.getJid().asBareJid()
                                                        + ": unable to change node configuration"
                                                        + " for avatar node");
                                        publishAvatar(account, avatar, null, false, callback);
                                    }
                                });
                    } else {
                        Element error = result.findChild("error");
                        Log.d(
                                Config.LOGTAG,
                                account.getJid().asBareJid()
                                        + ": server rejected avatar "
                                        + (avatar.size / 1024)
                                        + "KiB "
                                        + (error != null ? error.toString() : ""));
                        if (callback != null) {
                            callback.onAvatarPublicationFailed(
                                    R.string.error_publish_avatar_server_reject);
                        }
                    }
                });
    }

    public void publishAvatarMetadata(
            Account account,
            final Avatar avatar,
            final Bundle options,
            final boolean retry,
            final OnAvatarPublication callback) {
        final Iq packet =
                XmppConnectionService.this.mIqGenerator.publishAvatarMetadata(avatar, options);
        sendIqPacket(
                account,
                packet,
                result -> {
                    if (result.getType() == Iq.Type.RESULT) {
                        if (account.setAvatar(avatar.getFilename())) {
                            getAvatarService().clear(account);
                            databaseBackend.updateAccount(account);
                            notifyAccountAvatarHasChanged(account);
                        }
                        Log.d(
                                Config.LOGTAG,
                                account.getJid().asBareJid()
                                        + ": published avatar "
                                        + (avatar.size / 1024)
                                        + "KiB");
                        if (callback != null) {
                            callback.onAvatarPublicationSucceeded();
                        }
                    } else if (retry && PublishOptions.preconditionNotMet(result)) {
                        pushNodeConfiguration(
                                account,
                                Namespace.AVATAR_METADATA,
                                options,
                                new OnConfigurationPushed() {
                                    @Override
                                    public void onPushSucceeded() {
                                        Log.d(
                                                Config.LOGTAG,
                                                account.getJid().asBareJid()
                                                        + ": changed node configuration for avatar"
                                                        + " meta data node");
                                        publishAvatarMetadata(
                                                account, avatar, options, false, callback);
                                    }

                                    @Override
                                    public void onPushFailed() {
                                        Log.d(
                                                Config.LOGTAG,
                                                account.getJid().asBareJid()
                                                        + ": unable to change node configuration"
                                                        + " for avatar meta data node");
                                        publishAvatarMetadata(
                                                account, avatar, null, false, callback);
                                    }
                                });
                    } else {
                        if (callback != null) {
                            callback.onAvatarPublicationFailed(
                                    R.string.error_publish_avatar_server_reject);
                        }
                    }
                });
    }

    public void republishAvatarIfNeeded(final Account account) {
        if (account.getAxolotlService().isPepBroken()) {
            Log.d(
                    Config.LOGTAG,
                    account.getJid().asBareJid()
                            + ": skipping republication of avatar because pep is broken");
            return;
        }
        final Iq packet = this.mIqGenerator.retrieveAvatarMetaData(null);
        this.sendIqPacket(
                account,
                packet,
                new Consumer<Iq>() {

                    private Avatar parseAvatar(final Iq packet) {
                        final var pubsub = packet.getExtension(PubSub.class);
                        if (pubsub == null) {
                            return null;
                        }
                        final var items = pubsub.getItems();
                        if (items == null) {
                            return null;
                        }
                        final var item = items.getFirstItemWithId(Metadata.class);
                        if (item == null) {
                            return null;
                        }
                        return Avatar.parseMetadata(item.getKey(), item.getValue());
                    }

                    private boolean errorIsItemNotFound(Iq packet) {
                        Element error = packet.findChild("error");
                        return packet.getType() == Iq.Type.ERROR
                                && error != null
                                && error.hasChild("item-not-found");
                    }

                    @Override
                    public void accept(final Iq packet) {
                        if (packet.getType() == Iq.Type.RESULT || errorIsItemNotFound(packet)) {
                            final Avatar serverAvatar = parseAvatar(packet);
                            if (serverAvatar == null && account.getAvatar() != null) {
                                final Avatar avatar =
                                        fileBackend.getStoredPepAvatar(account.getAvatar());
                                if (avatar != null) {
                                    Log.d(
                                            Config.LOGTAG,
                                            account.getJid().asBareJid()
                                                    + ": avatar on server was null. republishing");
                                    // publishing as 'open' - old server (that requires
                                    // republication) likely doesn't support access models anyway
                                    publishAvatar(
                                            account,
                                            fileBackend.getStoredPepAvatar(account.getAvatar()),
                                            true,
                                            null);
                                } else {
                                    Log.e(
                                            Config.LOGTAG,
                                            account.getJid().asBareJid()
                                                    + ": error rereading avatar");
                                }
                            }
                        }
                    }
                });
    }

    public void cancelAvatarFetches(final Account account) {
        synchronized (mInProgressAvatarFetches) {
            for (final Iterator<String> iterator = mInProgressAvatarFetches.iterator();
                    iterator.hasNext(); ) {
                final String KEY = iterator.next();
                if (KEY.startsWith(account.getJid().asBareJid() + "_")) {
                    iterator.remove();
                }
            }
        }
    }

    public void fetchAvatar(Account account, Avatar avatar) {
        fetchAvatar(account, avatar, null);
    }

    public void fetchAvatar(
            Account account, final Avatar avatar, final UiCallback<Avatar> callback) {
        if (databaseBackend.isBlockedMedia(avatar.cid())) {
            if (callback != null) callback.error(0, null);
            return;
        }

        final String KEY = generateFetchKey(account, avatar);
        synchronized (this.mInProgressAvatarFetches) {
            if (mInProgressAvatarFetches.add(KEY)) {
                switch (avatar.origin) {
                    case PEP:
                        this.mInProgressAvatarFetches.add(KEY);
                        fetchAvatarPep(account, avatar, callback);
                        break;
                    case VCARD:
                        this.mInProgressAvatarFetches.add(KEY);
                        fetchAvatarVcard(account, avatar, callback);
                        break;
                }
            } else if (avatar.origin == Avatar.Origin.PEP) {
                mOmittedPepAvatarFetches.add(KEY);
            } else {
                Log.d(
                        Config.LOGTAG,
                        account.getJid().asBareJid()
                                + ": already fetching "
                                + avatar.origin
                                + " avatar for "
                                + avatar.owner);
            }
        }
    }

    private void fetchAvatarPep(
            final Account account, final Avatar avatar, final UiCallback<Avatar> callback) {
        final Iq packet = this.mIqGenerator.retrievePepAvatar(avatar);
        sendIqPacket(
                account,
                packet,
                (result) -> {
                    synchronized (mInProgressAvatarFetches) {
                        mInProgressAvatarFetches.remove(generateFetchKey(account, avatar));
                    }
                    final String ERROR =
                            account.getJid().asBareJid()
                                    + ": fetching avatar for "
                                    + avatar.owner
                                    + " failed ";
                    if (result.getType() == Iq.Type.RESULT) {
                        avatar.image = IqParser.avatarData(result);
                        if (avatar.image != null) {
                            if (getFileBackend().save(avatar)) {
                                if (account.getJid().asBareJid().equals(avatar.owner)) {
                                    if (account.setAvatar(avatar.getFilename())) {
                                        databaseBackend.updateAccount(account);
                                    }
                                    getAvatarService().clear(account);
                                    updateConversationUi();
                                    updateAccountUi();
                                } else {
                                    final Contact contact =
                                            account.getRoster().getContact(avatar.owner);
                                    contact.setAvatar(avatar);
                                    syncRoster(account);
                                    getAvatarService().clear(contact);
                                    updateConversationUi();
                                    updateRosterUi(UpdateRosterReason.AVATAR);
                                }
                                if (callback != null) {
                                    callback.success(avatar);
                                }
                                Log.d(
                                        Config.LOGTAG,
                                        account.getJid().asBareJid()
                                                + ": successfully fetched pep avatar for "
                                                + avatar.owner);
                                return;
                            }
                        } else {

                            Log.d(Config.LOGTAG, ERROR + "(parsing error)");
                        }
                    } else {
                        Element error = result.findChild("error");
                        if (error == null) {
                            Log.d(Config.LOGTAG, ERROR + "(server error)");
                        } else {
                            Log.d(Config.LOGTAG, ERROR + error.toString());
                        }
                    }
                    if (callback != null) {
                        callback.error(0, null);
                    }
                });
    }

    private void fetchAvatarVcard(
            final Account account, final Avatar avatar, final UiCallback<Avatar> callback) {
        final Iq packet = this.mIqGenerator.retrieveVcardAvatar(avatar);
        this.sendIqPacket(
                account,
                packet,
                response -> {
                    final boolean previouslyOmittedPepFetch;
                    synchronized (mInProgressAvatarFetches) {
                        final String KEY = generateFetchKey(account, avatar);
                        mInProgressAvatarFetches.remove(KEY);
                        previouslyOmittedPepFetch = mOmittedPepAvatarFetches.remove(KEY);
                    }
                    if (response.getType() == Iq.Type.RESULT) {
                        Element vCard = response.findChild("vCard", "vcard-temp");
                        Element photo = vCard != null ? vCard.findChild("PHOTO") : null;
                        String image = photo != null ? photo.findChildContent("BINVAL") : null;
                        if (image != null) {
                            avatar.image = image;
                            if (getFileBackend().save(avatar)) {
                                Log.d(
                                        Config.LOGTAG,
                                        account.getJid().asBareJid()
                                                + ": successfully fetched vCard avatar for "
                                                + avatar.owner
                                                + " omittedPep="
                                                + previouslyOmittedPepFetch);
                                if (avatar.owner.isBareJid()) {
                                    if (account.getJid().asBareJid().equals(avatar.owner)
                                            && account.getAvatar() == null) {
                                        Log.d(
                                                Config.LOGTAG,
                                                account.getJid().asBareJid()
                                                        + ": had no avatar. replacing with vcard");
                                        account.setAvatar(avatar.getFilename());
                                        databaseBackend.updateAccount(account);
                                        getAvatarService().clear(account);
                                        updateAccountUi();
                                    } else {
                                        final Contact contact =
                                                account.getRoster().getContact(avatar.owner);
                                        contact.setAvatar(avatar, previouslyOmittedPepFetch);
                                        syncRoster(account);
                                        getAvatarService().clear(contact);
                                        updateRosterUi(UpdateRosterReason.AVATAR);
                                    }
                                    updateConversationUi();
                                } else {
                                    Conversation conversation =
                                            find(account, avatar.owner.asBareJid());
                                    if (conversation != null
                                            && conversation.getMode() == Conversation.MODE_MULTI) {
                                        MucOptions.User user =
                                                conversation
                                                        .getMucOptions()
                                                        .findUserByFullJid(avatar.owner);
                                        if (user != null) {
                                            if (user.setAvatar(avatar)) {
                                                getAvatarService().clear(user);
                                                updateConversationUi();
                                                updateMucRosterUi();
                                            }
                                            if (user.getRealJid() != null) {
                                                Contact contact =
                                                        account.getRoster()
                                                                .getContact(user.getRealJid());
                                                contact.setAvatar(avatar);
                                                syncRoster(account);
                                                getAvatarService().clear(contact);
                                                updateRosterUi(UpdateRosterReason.AVATAR);
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                });
    }

    public void checkForAvatar(final Account account, final UiCallback<Avatar> callback) {
        final Iq packet = this.mIqGenerator.retrieveAvatarMetaData(null);
        this.sendIqPacket(
                account,
                packet,
                response -> {
                    if (response.getType() != Iq.Type.RESULT) {
                        callback.error(0, null);
                    }
                    final var pubsub = packet.getExtension(PubSub.class);
                    if (pubsub == null) {
                        callback.error(0, null);
                        return;
                    }
                    final var items = pubsub.getItems();
                    if (items == null) {
                        callback.error(0, null);
                        return;
                    }
                    final var item = items.getFirstItemWithId(Metadata.class);
                    if (item == null) {
                        callback.error(0, null);
                        return;
                    }
                    final var avatar = Avatar.parseMetadata(item.getKey(), item.getValue());
                    if (avatar == null) {
                        callback.error(0, null);
                        return;
                    }
                    avatar.owner = account.getJid().asBareJid();
                    if (fileBackend.isAvatarCached(avatar)) {
                        if (account.setAvatar(avatar.getFilename())) {
                            databaseBackend.updateAccount(account);
                        }
                        getAvatarService().clear(account);
                        callback.success(avatar);
                    } else {
                        fetchAvatarPep(account, avatar, callback);
                    }
                });
    }

    public void notifyAccountAvatarHasChanged(final Account account) {
        final XmppConnection connection = account.getXmppConnection();
        if (connection != null && connection.getFeatures().bookmarksConversion()) {
            Log.d(
                    Config.LOGTAG,
                    account.getJid().asBareJid()
                            + ": avatar changed. resending presence to online group chats");
            for (Conversation conversation : conversations) {
                if (conversation.getAccount() == account && conversation.getMode() == Conversational.MODE_MULTI) {
                    presenceToMuc(conversation);
                }
            }
        }
    }

    public void fetchVcard4(Account account, final Contact contact, final Consumer<Element> callback) {
        final var packet = this.mIqGenerator.retrieveVcard4(contact.getJid());
        sendIqPacket(account, packet, (result) -> {
            if (result.getType() == Iq.Type.RESULT) {
                final Element item = IqParser.getItem(result);
                if (item != null) {
                    final Element vcard4 = item.findChild("vcard", Namespace.VCARD4);
                    if (vcard4 != null) {
                        if (callback != null) {
                            callback.accept(vcard4);
                        }
                        return;
                    }
                }
            } else {
                Element error = result.findChild("error");
                if (error == null) {
                    Log.d(Config.LOGTAG, "fetchVcard4 (server error)");
                } else {
                    Log.d(Config.LOGTAG, "fetchVcard4 " + error.toString());
                }
            }
            if (callback != null) {
                callback.accept(null);
            }

        });
    }

    public void deleteContactOnServer(Contact contact) {
        contact.resetOption(Contact.Options.PREEMPTIVE_GRANT);
        contact.resetOption(Contact.Options.DIRTY_PUSH);
        contact.setOption(Contact.Options.DIRTY_DELETE);
        Account account = contact.getAccount();
        if (account.getStatus() == Account.State.ONLINE) {
            final Iq iq = new Iq(Iq.Type.SET);
            Element item = iq.query(Namespace.ROSTER).addChild("item");
            item.setAttribute("jid", contact.getJid());
            item.setAttribute("subscription", "remove");
            account.getXmppConnection().sendIqPacket(iq, mDefaultIqHandler);
        }
    }

    public void updateConversation(final Conversation conversation) {
        mDatabaseWriterExecutor.execute(() -> databaseBackend.updateConversation(conversation));
    }

    private void reconnectAccount(
            final Account account, final boolean force, final boolean interactive) {
        synchronized (account) {
            final XmppConnection existingConnection = account.getXmppConnection();
            final XmppConnection connection;
            if (existingConnection != null) {
                connection = existingConnection;
            } else if (account.isConnectionEnabled()) {
                connection = createConnection(account);
                account.setXmppConnection(connection);
            } else {
                return;
            }
            final boolean hasInternet = hasInternetConnection();
            if (account.isConnectionEnabled() && hasInternet) {
                if (!force) {
                    disconnect(account, false);
                }
                Thread thread = new Thread(connection);
                connection.setInteractive(interactive);
                connection.prepareNewConnection();
                connection.interrupt();
                thread.start();
                scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
            } else {
                disconnect(account, force || account.getTrueStatus().isError() || !hasInternet);
                account.getRoster().clearPresences();
                connection.resetEverything();
                final AxolotlService axolotlService = account.getAxolotlService();
                if (axolotlService != null) {
                    axolotlService.resetBrokenness();
                }
                if (!hasInternet) {
                    account.setStatus(Account.State.NO_INTERNET);
                }
            }
        }
    }

    public void reconnectAccountInBackground(final Account account) {
        new Thread(() -> reconnectAccount(account, false, true)).start();
    }

    public void invite(final Conversation conversation, final Jid contact) {
        Log.d(
                Config.LOGTAG,
                conversation.getAccount().getJid().asBareJid()
                        + ": inviting "
                        + contact
                        + " to "
                        + conversation.getJid().asBareJid());
        final MucOptions.User user =
                conversation.getMucOptions().findUserByRealJid(contact.asBareJid());
        if (user == null || user.getAffiliation() == MucOptions.Affiliation.OUTCAST) {
            changeAffiliationInConference(conversation, contact, MucOptions.Affiliation.NONE, null);
        }
        final var packet = mMessageGenerator.invite(conversation, contact);
        sendMessagePacket(conversation.getAccount(), packet);
    }

    public void directInvite(Conversation conversation, Jid jid) {
        final var packet = mMessageGenerator.directInvite(conversation, jid);
        sendMessagePacket(conversation.getAccount(), packet);
    }

    public void resetSendingToWaiting(Account account) {
        for (Conversation conversation : getConversations()) {
            if (conversation.getAccount() == account) {
                conversation.findUnsentTextMessages(
                        message -> markMessage(message, Message.STATUS_WAITING));
            }
        }
    }

    public Message markMessage(
            final Account account, final Jid recipient, final String uuid, final int status) {
        return markMessage(account, recipient, uuid, status, null);
    }

    public Message markMessage(
            final Account account,
            final Jid recipient,
            final String uuid,
            final int status,
            String errorMessage) {
        if (uuid == null) {
            return null;
        }
        for (Conversation conversation : getConversations()) {
            if (conversation.getJid().asBareJid().equals(recipient)
                    && conversation.getAccount() == account) {
                final Message message = conversation.findSentMessageWithUuidOrRemoteId(uuid);
                if (message != null) {
                    markMessage(message, status, errorMessage);
                }
                return message;
            }
        }
        return null;
    }

    public boolean markMessage(
            final Conversation conversation,
            final String uuid,
            final int status,
            final String serverMessageId) {
        return markMessage(conversation, uuid, status, serverMessageId, null, null, null, null, null);
    }

    public boolean markMessage(final Conversation conversation, final String uuid, final int status, final String serverMessageId, final LocalizedContent body, final Element html, final String subject, final Element thread, final Set<Message.FileParams> attachments) {
        if (uuid == null) {
            return false;
        } else {
            final Message message = conversation.findSentMessageWithUuid(uuid);
            if (message != null) {
                if (message.getServerMsgId() == null) {
                    message.setServerMsgId(serverMessageId);
                }
                if (message.getEncryption() == Message.ENCRYPTION_NONE && (body != null || html != null || subject != null || thread != null || attachments != null)) {
                    message.setBody(body.content);
                    if (body.count > 1) {
                        message.setBodyLanguage(body.language);
                    }
                    message.setHtml(html);
                    message.setSubject(subject);
                    message.setThread(thread);
                    if (attachments != null && attachments.isEmpty()) {
                        message.setRelativeFilePath(null);
                        message.resetFileParams();
                    }
                    markMessage(message, status, null, true);
                } else {
                    markMessage(message, status);
                }
                return true;
            } else {
                return false;
            }
        }
    }

    public void markMessage(Message message, int status) {
        markMessage(message, status, null);
    }

    public void markMessage(final Message message, final int status, final String errorMessage) {
        markMessage(message, status, errorMessage, false);
    }

    public void markMessage(
            final Message message,
            final int status,
            final String errorMessage,
            final boolean includeBody) {
        final int oldStatus = message.getStatus();
        if (status == Message.STATUS_SEND_FAILED
                && (oldStatus == Message.STATUS_SEND_RECEIVED
                        || oldStatus == Message.STATUS_SEND_DISPLAYED)) {
            return;
        }
        if (status == Message.STATUS_SEND_RECEIVED && oldStatus == Message.STATUS_SEND_DISPLAYED) {
            return;
        }
        message.setErrorMessage(errorMessage);
        message.setStatus(status);
        databaseBackend.updateMessage(message, includeBody);
        updateConversationUi();
        if (oldStatus != status && status == Message.STATUS_SEND_FAILED) {
            mNotificationService.pushFailedDelivery(message);
        }
    }

    public SharedPreferences getPreferences() {
        return PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
    }

    public long getAutomaticMessageDeletionDate() {
        final long timeout =
                getLongPreference(
                        AppSettings.AUTOMATIC_MESSAGE_DELETION,
                        R.integer.automatic_message_deletion);
        return timeout == 0 ? timeout : (System.currentTimeMillis() - (timeout * 1000));
    }

    public long getLongPreference(String name, @IntegerRes int res) {
        long defaultValue = getResources().getInteger(res);
        try {
            return Long.parseLong(getPreferences().getString(name, String.valueOf(defaultValue)));
        } catch (NumberFormatException e) {
            return defaultValue;
        }
    }

    public boolean getBooleanPreference(String name, @BoolRes int res) {
        return getPreferences().getBoolean(name, getResources().getBoolean(res));
    }

    public String getStringPreference(String name, @BoolRes int res) {
        return getPreferences().getString(name, getResources().getString(res));
    }

    public boolean confirmMessages() {
        return getBooleanPreference("confirm_messages", R.bool.confirm_messages);
    }

    public boolean allowMessageCorrection() {
        return getBooleanPreference("allow_message_correction", R.bool.allow_message_correction);
    }

    public boolean sendChatStates() {
        return getBooleanPreference("chat_states", R.bool.chat_states);
    }

    public boolean useTorToConnect() {
        return getBooleanPreference("use_tor", R.bool.use_tor);
    }

    public boolean broadcastLastActivity() {
        return getBooleanPreference(AppSettings.BROADCAST_LAST_ACTIVITY, R.bool.last_activity);
    }

    public int unreadCount() {
        int count = 0;
        for (Conversation conversation : getConversations()) {
            count += conversation.unreadCount(this);
        }
        return count;
    }

    private <T> List<T> threadSafeList(Set<T> set) {
        synchronized (LISTENER_LOCK) {
            return set.isEmpty() ? Collections.emptyList() : new ArrayList<>(set);
        }
    }

    public void showErrorToastInUi(int resId) {
        for (OnShowErrorToast listener : threadSafeList(this.mOnShowErrorToasts)) {
            listener.onShowErrorToast(resId);
        }
    }

    public void updateConversationUi() {
        updateConversationUi(false);
    }

    public void updateConversationUi(boolean newCaps) {
        for (OnConversationUpdate listener : threadSafeList(this.mOnConversationUpdates)) {
            listener.onConversationUpdate(newCaps);
        }
    }

    public void notifyJingleRtpConnectionUpdate(
            final Account account,
            final Jid with,
            final String sessionId,
            final RtpEndUserState state) {
        for (OnJingleRtpConnectionUpdate listener :
                threadSafeList(this.onJingleRtpConnectionUpdate)) {
            listener.onJingleRtpConnectionUpdate(account, with, sessionId, state);
        }
    }

    public void notifyJingleRtpConnectionUpdate(
            CallIntegration.AudioDevice selectedAudioDevice,
            Set<CallIntegration.AudioDevice> availableAudioDevices) {
        for (OnJingleRtpConnectionUpdate listener :
                threadSafeList(this.onJingleRtpConnectionUpdate)) {
            listener.onAudioDeviceChanged(selectedAudioDevice, availableAudioDevices);
        }
    }

    public void updateAccountUi() {
        for (final OnAccountUpdate listener : threadSafeList(this.mOnAccountUpdates)) {
            listener.onAccountUpdate();
        }
    }

    public void updateRosterUi(final UpdateRosterReason reason) {
        if (reason == UpdateRosterReason.PRESENCE) throw new IllegalArgumentException("PRESENCE must also come with a contact");
        updateRosterUi(reason, null);
    }

    public void updateRosterUi(final UpdateRosterReason reason, final Contact contact) {
        for (OnRosterUpdate listener : threadSafeList(this.mOnRosterUpdates)) {
            listener.onRosterUpdate(reason, contact);
        }
    }

    public boolean displayCaptchaRequest(Account account, String id, Data data, Bitmap captcha) {
        if (mOnCaptchaRequested.size() > 0) {
            DisplayMetrics metrics = getApplicationContext().getResources().getDisplayMetrics();
            Bitmap scaled =
                    Bitmap.createScaledBitmap(
                            captcha,
                            (int) (captcha.getWidth() * metrics.scaledDensity),
                            (int) (captcha.getHeight() * metrics.scaledDensity),
                            false);
            for (OnCaptchaRequested listener : threadSafeList(this.mOnCaptchaRequested)) {
                listener.onCaptchaRequested(account, id, data, scaled);
            }
            return true;
        }
        return false;
    }

    public void updateBlocklistUi(final OnUpdateBlocklist.Status status) {
        for (OnUpdateBlocklist listener : threadSafeList(this.mOnUpdateBlocklist)) {
            listener.OnUpdateBlocklist(status);
        }
    }

    public void updateMucRosterUi() {
        for (OnMucRosterUpdate listener : threadSafeList(this.mOnMucRosterUpdate)) {
            listener.onMucRosterUpdate();
        }
    }

    public void keyStatusUpdated(AxolotlService.FetchStatus report) {
        for (OnKeyStatusUpdated listener : threadSafeList(this.mOnKeyStatusUpdated)) {
            listener.onKeyStatusUpdated(report);
        }
    }

    public Account findAccountByJid(final Jid jid) {
        for (final Account account : this.accounts) {
            if (account.getJid().asBareJid().equals(jid.asBareJid())) {
                return account;
            }
        }
        return null;
    }

    public Account findAccountByUuid(final String uuid) {
        for (Account account : this.accounts) {
            if (account.getUuid().equals(uuid)) {
                return account;
            }
        }
        return null;
    }

    public Conversation findConversationByUuid(String uuid) {
        for (Conversation conversation : getConversations()) {
            if (conversation.getUuid().equals(uuid)) {
                return conversation;
            }
        }
        return null;
    }

    public Conversation findUniqueConversationByJid(XmppUri xmppUri) {
        List<Conversation> findings = new ArrayList<>();
        for (Conversation c : getConversations()) {
            if (c.getAccount().isEnabled()
                    && c.getJid().asBareJid().equals(xmppUri.getJid().asBareJid())
                    && ((c.getMode() == Conversational.MODE_MULTI)
                            == xmppUri.isAction(XmppUri.ACTION_JOIN))) {
                findings.add(c);
            }
        }
        return findings.size() == 1 ? findings.get(0) : null;
    }

    public boolean markRead(final Conversation conversation, boolean dismiss) {
        return markRead(conversation, null, dismiss).size() > 0;
    }

    public void markRead(final Conversation conversation) {
        markRead(conversation, null, true);
    }

    public List<Message> markRead(
            final Conversation conversation, String upToUuid, boolean dismiss) {
        if (dismiss) {
            mNotificationService.clear(conversation);
        }
        final List<Message> readMessages = conversation.markRead(upToUuid);
        if (readMessages.size() > 0) {
            Runnable runnable =
                    () -> {
                        for (Message message : readMessages) {
                            databaseBackend.updateMessage(message, false);
                        }
                    };
            mDatabaseWriterExecutor.execute(runnable);
            updateConversationUi();
            updateUnreadCountBadge();
            return readMessages;
        } else {
            return readMessages;
        }
    }

    public void markNotificationDismissed(final List<Message> messages) {
        Runnable runnable = () -> {
            for (final var message : messages) {
                message.markNotificationDismissed();
                databaseBackend.updateMessage(message, false);
            }
        };
        mDatabaseWriterExecutor.execute(runnable);
    }

    public synchronized void updateUnreadCountBadge() {
        int count = unreadCount();
        if (unreadCount != count) {
            Log.d(Config.LOGTAG, "update unread count to " + count);
            if (count > 0) {
                ShortcutBadger.applyCount(getApplicationContext(), count);
            } else {
                ShortcutBadger.removeCount(getApplicationContext());
            }
            unreadCount = count;
        }
    }

    public void sendReadMarker(final Conversation conversation, final String upToUuid) {
        final boolean isPrivateAndNonAnonymousMuc =
                conversation.getMode() == Conversation.MODE_MULTI
                        && conversation.isPrivateAndNonAnonymous();
        final List<Message> readMessages = this.markRead(conversation, upToUuid, true);
        if (readMessages.isEmpty()) {
            return;
        }
        final var account = conversation.getAccount();
        final var connection = account.getXmppConnection();
        updateConversationUi();
        final var last =
                Iterables.getLast(
                        Collections2.filter(
                                readMessages,
                                m ->
                                        !m.isPrivateMessage()
                                                && m.getStatus() == Message.STATUS_RECEIVED),
                        null);
        if (last == null) {
            return;
        }

        final boolean sendDisplayedMarker =
                confirmMessages()
                        && (last.trusted() || isPrivateAndNonAnonymousMuc)
                        && last.getRemoteMsgId() != null
                        && (last.markable || isPrivateAndNonAnonymousMuc);
        final boolean serverAssist =
                connection != null && connection.getFeatures().mdsServerAssist();

        final String stanzaId = last.getServerMsgId();

        if (sendDisplayedMarker && serverAssist) {
            final var mdsDisplayed = mIqGenerator.mdsDisplayed(stanzaId, conversation);
            final var packet = mMessageGenerator.confirm(last);
            packet.addChild(mdsDisplayed);
            if (!last.isPrivateMessage()) {
                packet.setTo(packet.getTo().asBareJid());
            }
            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server assisted " + packet);
            this.sendMessagePacket(account, packet);
        } else {
            publishMds(last);
            // read markers will be sent after MDS to flush the CSI stanza queue
            if (sendDisplayedMarker) {
                Log.d(
                        Config.LOGTAG,
                        conversation.getAccount().getJid().asBareJid()
                                + ": sending displayed marker to "
                                + last.getCounterpart().toString());
                final var packet = mMessageGenerator.confirm(last);
                this.sendMessagePacket(account, packet);
            }
        }
    }

    private void publishMds(@Nullable final Message message) {
        final String stanzaId = message == null ? null : message.getServerMsgId();
        if (Strings.isNullOrEmpty(stanzaId)) {
            return;
        }
        final Conversation conversation;
        final var conversational = message.getConversation();
        if (conversational instanceof Conversation c) {
            conversation = c;
        } else {
            return;
        }
        final var account = conversation.getAccount();
        final var connection = account.getXmppConnection();
        if (connection == null || !connection.getFeatures().mds()) {
            return;
        }
        final Jid itemId;
        if (message.isPrivateMessage()) {
            itemId = message.getCounterpart();
        } else {
            itemId = conversation.getJid().asBareJid();
        }
        Log.d(Config.LOGTAG, "publishing mds for " + itemId + "/" + stanzaId);
        publishMds(account, itemId, stanzaId, conversation);
    }

    private void publishMds(
            final Account account,
            final Jid itemId,
            final String stanzaId,
            final Conversation conversation) {
        final var item = mIqGenerator.mdsDisplayed(stanzaId, conversation);
        pushNodeAndEnforcePublishOptions(
                account,
                Namespace.MDS_DISPLAYED,
                item,
                itemId.toString(),
                PublishOptions.persistentWhitelistAccessMaxItems());
    }

    public boolean sendReactions(final Message message, final Collection<String> reactions) {
        if (message.isPrivateMessage()) throw new IllegalArgumentException("Reactions to PM not implemented");
        if (message.getConversation() instanceof Conversation conversation) {
            final var isPrivateMessage = message.isPrivateMessage();
            final Jid reactTo;
            final boolean typeGroupChat;
            final String reactToId;
            final Collection<Reaction> combinedReactions;
            final var newReactions = new HashSet<>(reactions);
            newReactions.removeAll(message.getAggregatedReactions().ourReactions);
            if (conversation.getMode() == Conversational.MODE_MULTI && !isPrivateMessage) {
                final var mucOptions = conversation.getMucOptions();
                if (!mucOptions.participating()) {
                    Log.e(Config.LOGTAG, "not participating in MUC");
                    return false;
                }
                final var self = mucOptions.getSelf();
                final String occupantId = self.getOccupantId();
                if (Strings.isNullOrEmpty(occupantId)) {
                    Log.e(Config.LOGTAG, "occupant id not found for reaction in MUC");
                    return false;
                }
                final var existingRaw =
                        ImmutableSet.copyOf(
                                Collections2.transform(message.getReactions(), r -> r.reaction));
                final var reactionsAsExistingVariants =
                        ImmutableSet.copyOf(
                                Collections2.transform(
                                        reactions, r -> Emoticons.existingVariant(r, existingRaw)));
                if (!reactions.equals(reactionsAsExistingVariants)) {
                    Log.d(Config.LOGTAG, "modified reactions to existing variants");
                }
                reactToId = message.getServerMsgId();
                reactTo = conversation.getJid().asBareJid();
                typeGroupChat = true;
                combinedReactions =
                        Reaction.withMine(
                                message.getReactions(),
                                reactionsAsExistingVariants,
                                false,
                                self.getFullJid(),
                                conversation.getAccount().getJid(),
                                occupantId,
                                null);
            } else {
                if (message.isCarbon() || message.getStatus() == Message.STATUS_RECEIVED) {
                    reactToId = message.getRemoteMsgId();
                } else {
                    reactToId = message.getUuid();
                }
                typeGroupChat = false;
                if (isPrivateMessage) {
                    reactTo = message.getCounterpart();
                } else {
                    reactTo = conversation.getJid().asBareJid();
                }
                combinedReactions =
                        Reaction.withFrom(
                                message.getReactions(),
                                reactions,
                                false,
                                conversation.getAccount().getJid(),
                                null);
            }
            if (reactTo == null || Strings.isNullOrEmpty(reactToId)) {
                Log.e(Config.LOGTAG, "could not find id to react to");
                return false;
            }

            final var packet =
                    mMessageGenerator.reaction(reactTo, typeGroupChat, message, reactToId, reactions);

            final var quote = QuoteHelper.quote(MessageUtils.prepareQuote(message)) + "\n";
            final var body  = quote + String.join(" ", newReactions);
            if (conversation.getNextEncryption() == Message.ENCRYPTION_AXOLOTL && newReactions.size() > 0) {
                FILE_ATTACHMENT_EXECUTOR.execute(() -> {
                    XmppAxolotlMessage axolotlMessage = conversation.getAccount().getAxolotlService().encrypt(body, conversation);
                    packet.setAxolotlMessage(axolotlMessage.toElement());
                    packet.addChild("encryption", "urn:xmpp:eme:0")
                        .setAttribute("name", "OMEMO")
                        .setAttribute("namespace", AxolotlService.PEP_PREFIX);
                    sendMessagePacket(conversation.getAccount(), packet);
                    message.setReactions(combinedReactions);
                    updateMessage(message, false);
                });
            } else if (conversation.getNextEncryption() == Message.ENCRYPTION_NONE || newReactions.size() < 1) {
                if (newReactions.size() > 0) {
                    packet.setBody(body);

                    packet.addChild("reply", "urn:xmpp:reply:0")
                        .setAttribute("to", message.getCounterpart())
                        .setAttribute("id", reactToId);
                    final var replyFallback = packet.addChild("fallback", "urn:xmpp:fallback:0").setAttribute("for", "urn:xmpp:reply:0");
                    replyFallback.addChild("body", "urn:xmpp:fallback:0")
                        .setAttribute("start", "0")
                        .setAttribute("end", "" + quote.codePointCount(0, quote.length()));

                    final var fallback = packet.addChild("fallback", "urn:xmpp:fallback:0").setAttribute("for", "urn:xmpp:reactions:0");
                    fallback.addChild("body", "urn:xmpp:fallback:0");
                }

                sendMessagePacket(conversation.getAccount(), packet);
                message.setReactions(combinedReactions);
                updateMessage(message, false);
            }

            return true;
        } else {
            return false;
        }
    }

    public MemorizingTrustManager getMemorizingTrustManager() {
        return this.mMemorizingTrustManager;
    }

    public void setMemorizingTrustManager(MemorizingTrustManager trustManager) {
        this.mMemorizingTrustManager = trustManager;
    }

    public void updateMemorizingTrustManager() {
        final MemorizingTrustManager trustManager;
        if (appSettings.isTrustSystemCAStore()) {
            trustManager = new MemorizingTrustManager(getApplicationContext());
        } else {
            trustManager = new MemorizingTrustManager(getApplicationContext(), null);
        }
        setMemorizingTrustManager(trustManager);
    }

    public LruCache<String, Drawable> getDrawableCache() {
        return this.mDrawableCache;
    }

    public Collection<String> getKnownHosts() {
        final Set<String> hosts = new HashSet<>();
        for (final Account account : getAccounts()) {
            hosts.add(account.getServer());
            for (final Contact contact : account.getRoster().getContacts()) {
                if (contact.showInRoster()) {
                    final String server = contact.getServer();
                    if (server != null) {
                        hosts.add(server);
                    }
                }
            }
        }
        if (Config.QUICKSY_DOMAIN != null) {
            hosts.remove(
                    Config.QUICKSY_DOMAIN
                            .toString()); // we only want to show this when we type a e164
            // number
        }
        if (Config.MAGIC_CREATE_DOMAIN != null) {
            hosts.add(Config.MAGIC_CREATE_DOMAIN);
        }
        hosts.add("chat.above.im");
        return hosts;
    }

    public Collection<String> getKnownConferenceHosts() {
        final Set<String> mucServers = new HashSet<>();
        for (final Account account : accounts) {
            if (account.getXmppConnection() != null) {
                mucServers.addAll(account.getXmppConnection().getMucServers());
                for (final Bookmark bookmark : account.getBookmarks()) {
                    final Jid jid = bookmark.getJid();
                    final String s = jid == null ? null : jid.getDomain().toString();
                    if (s != null) {
                        mucServers.add(s);
                    }
                }
            }
        }
        return mucServers;
    }

    public void sendMessagePacket(
            final Account account,
            final im.conversations.android.xmpp.model.stanza.Message packet) {
        final XmppConnection connection = account.getXmppConnection();
        if (connection != null) {
            connection.sendMessagePacket(packet);
        }
    }

    public void sendPresencePacket(
            final Account account,
            final im.conversations.android.xmpp.model.stanza.Presence packet) {
        final XmppConnection connection = account.getXmppConnection();
        if (connection != null) {
            connection.sendPresencePacket(packet);
        }
    }

    public void sendCreateAccountWithCaptchaPacket(Account account, String id, Data data) {
        final XmppConnection connection = account.getXmppConnection();
        if (connection == null) {
            return;
        }
        connection.sendCreateAccountWithCaptchaPacket(id, data);
    }

    public void sendIqPacket(final Account account, final Iq packet, final Consumer<Iq> callback) {
        sendIqPacket(account, packet, callback, null);
    }

    public void sendIqPacket(final Account account, final Iq packet, final Consumer<Iq> callback, Long timeout) {
        final XmppConnection connection = account.getXmppConnection();
        if (connection != null) {
            connection.sendIqPacket(packet, callback, timeout);
        } else if (callback != null) {
            callback.accept(Iq.TIMEOUT);
        }
    }

    public void sendPresence(final Account account) {
        sendPresence(account, checkListeners() && broadcastLastActivity());
    }

    private void sendPresence(final Account account, final boolean includeIdleTimestamp) {
        final Presence.Status status;
        if (manuallyChangePresence()) {
            status = account.getPresenceStatus();
        } else {
            status = getTargetPresence();
        }
        final var packet = mPresenceGenerator.selfPresence(account, status);
        if (mLastActivity > 0 && includeIdleTimestamp) {
            long since =
                    Math.min(mLastActivity, System.currentTimeMillis()); // don't send future dates
            packet.addChild("idle", Namespace.IDLE)
                    .setAttribute("since", AbstractGenerator.getTimestamp(since));
        }
        sendPresencePacket(account, packet);
    }

    private void deactivateGracePeriod() {
        for (Account account : getAccounts()) {
            account.deactivateGracePeriod();
        }
    }

    public void refreshAllPresences() {
        boolean includeIdleTimestamp = checkListeners() && broadcastLastActivity();
        for (Account account : getAccounts()) {
            if (account.isConnectionEnabled()) {
                sendPresence(account, includeIdleTimestamp);
            }
        }
    }

    private void refreshAllFcmTokens() {
        for (Account account : getAccounts()) {
            if (account.isOnlineAndConnected() && mPushManagementService.available(account)) {
                mPushManagementService.registerPushTokenOnServer(account);
            }
        }
    }

    private void sendOfflinePresence(final Account account) {
        Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": sending offline presence");
        sendPresencePacket(account, mPresenceGenerator.sendOfflinePresence(account));
    }

    public MessageGenerator getMessageGenerator() {
        return this.mMessageGenerator;
    }

    public PresenceGenerator getPresenceGenerator() {
        return this.mPresenceGenerator;
    }

    public IqGenerator getIqGenerator() {
        return this.mIqGenerator;
    }

    public JingleConnectionManager getJingleConnectionManager() {
        return this.mJingleConnectionManager;
    }

    private boolean hasJingleRtpConnection(final Account account) {
        return this.mJingleConnectionManager.hasJingleRtpConnection(account);
    }

    public MessageArchiveService getMessageArchiveService() {
        return this.mMessageArchiveService;
    }

    public QuickConversationsService getQuickConversationsService() {
        return this.mQuickConversationsService;
    }

    public List<Contact> findContacts(Jid jid, String accountJid) {
        ArrayList<Contact> contacts = new ArrayList<>();
        for (Account account : getAccounts()) {
            if ((account.isEnabled() || accountJid != null)
                    && (accountJid == null
                            || accountJid.equals(account.getJid().asBareJid().toString()))) {
                Contact contact = account.getRoster().getContactFromContactList(jid);
                if (contact != null) {
                    contacts.add(contact);
                }
            }
        }
        return contacts;
    }

    public Conversation findFirstMuc(Jid jid) {
        return findFirstMuc(jid, null);
    }

    public Conversation findFirstMuc(Jid jid, String accountJid) {
        for (Conversation conversation : getConversations()) {
            if ((conversation.getAccount().isEnabled() || accountJid != null)
                    && (accountJid == null || accountJid.equals(conversation.getAccount().getJid().asBareJid().toString()))
                    && conversation.getJid().asBareJid().equals(jid.asBareJid()) && conversation.getMode() == Conversation.MODE_MULTI) {
                return conversation;
            }
        }
        return null;
    }

    public NotificationService getNotificationService() {
        return this.mNotificationService;
    }

    public HttpConnectionManager getHttpConnectionManager() {
        return this.mHttpConnectionManager;
    }

    public void resendFailedMessages(final Message message, final boolean forceP2P) {
        message.setTime(System.currentTimeMillis());
        markMessage(message, Message.STATUS_WAITING);
        this.sendMessage(message, true, false, false, forceP2P, null);
        if (message.getConversation() instanceof Conversation c) {
            c.sort();
        }
        updateConversationUi();
    }

    public void clearConversationHistory(final Conversation conversation) {
        final long clearDate;
        final String reference;
        if (conversation.countMessages() > 0) {
            Message latestMessage = conversation.getLatestMessage();
            clearDate = latestMessage.getTimeSent() + 1000;
            reference = latestMessage.getServerMsgId();
        } else {
            clearDate = System.currentTimeMillis();
            reference = null;
        }
        conversation.clearMessages();
        conversation.setHasMessagesLeftOnServer(false); // avoid messages getting loaded through mam
        conversation.setLastClearHistory(clearDate, reference);
        Runnable runnable =
                () -> {
                    databaseBackend.deleteMessagesInConversation(conversation);
                    databaseBackend.updateConversation(conversation);
                };
        mDatabaseWriterExecutor.execute(runnable);
    }

    public boolean sendBlockRequest(
            final Blockable blockable, final boolean reportSpam, final String serverMsgId) {
        if (blockable != null && blockable.getBlockedJid() != null) {
            final var account = blockable.getAccount();
            final Jid jid = blockable.getBlockedJid();
            this.sendIqPacket(
                    account,
                    getIqGenerator().generateSetBlockRequest(jid, reportSpam, serverMsgId),
                    (response) -> {
                        if (response.getType() == Iq.Type.RESULT) {
                            account.getBlocklist().add(jid);
                            updateBlocklistUi(OnUpdateBlocklist.Status.BLOCKED);
                        }
                    });
            if (blockable.getBlockedJid().isFullJid()) {
                return false;
            } else if (removeBlockedConversations(blockable.getAccount(), jid)) {
                updateConversationUi();
                return true;
            } else {
                return false;
            }
        } else {
            return false;
        }
    }

    public boolean removeBlockedConversations(final Account account, final Jid blockedJid) {
        boolean removed = false;
        synchronized (this.conversations) {
            boolean domainJid = blockedJid.getLocal() == null;
            for (Conversation conversation : this.conversations) {
                boolean jidMatches =
                        (domainJid
                                        && blockedJid
                                                .getDomain()
                                                .equals(conversation.getJid().getDomain()))
                                || blockedJid.equals(conversation.getJid().asBareJid());
                if (conversation.getAccount() == account
                        && conversation.getMode() == Conversation.MODE_SINGLE
                        && jidMatches) {
                    this.conversations.remove(conversation);
                    markRead(conversation);
                    conversation.setStatus(Conversation.STATUS_ARCHIVED);
                    Log.d(
                            Config.LOGTAG,
                            account.getJid().asBareJid()
                                    + ": archiving conversation "
                                    + conversation.getJid().asBareJid()
                                    + " because jid was blocked");
                    updateConversation(conversation);
                    removed = true;
                }
            }
        }
        return removed;
    }

    public void sendUnblockRequest(final Blockable blockable) {
        if (blockable != null && blockable.getJid() != null) {
            final var account = blockable.getAccount();
            final Jid jid = blockable.getBlockedJid();
            this.sendIqPacket(
                    account,
                    getIqGenerator().generateSetUnblockRequest(jid),
                    response -> {
                        if (response.getType() == Iq.Type.RESULT) {
                            account.getBlocklist().remove(jid);
                            updateBlocklistUi(OnUpdateBlocklist.Status.UNBLOCKED);
                        }
                    });
        }
    }

    public void publishDisplayName(final Account account) {
        String displayName = account.getDisplayName();
        final Iq request;
        if (TextUtils.isEmpty(displayName)) {
            request = mIqGenerator.deleteNode(Namespace.NICK);
        } else {
            request = mIqGenerator.publishNick(displayName);
        }
        mAvatarService.clear(account);
        sendIqPacket(
                account,
                request,
                (packet) -> {
                    if (packet.getType() == Iq.Type.ERROR) {
                        Log.d(
                                Config.LOGTAG,
                                account.getJid().asBareJid()
                                        + ": unable to modify nick name "
                                        + packet);
                    }
                });
    }

    public ServiceDiscoveryResult getCachedServiceDiscoveryResult(Pair<String, String> key) {
        ServiceDiscoveryResult result = discoCache.get(key);
        if (result != null) {
            return result;
        } else {
            if (key.first == null || key.second == null) return null;
            result = databaseBackend.findDiscoveryResult(key.first, key.second);
            if (result != null) {
                discoCache.put(key, result);
            }
            return result;
        }
    }

    public void fetchFromGateway(Account account, final Jid jid, final String input, final OnGatewayResult callback) {
        final var request = new Iq(input == null ? Iq.Type.GET : Iq.Type.SET);
        request.setTo(jid);
        Element query = request.query("jabber:iq:gateway");
        if (input != null) {
            Element prompt = query.addChild("prompt");
            prompt.setContent(input);
        }
        sendIqPacket(account, request, packet -> {
            if (packet.getType() == Iq.Type.RESULT) {
                callback.onGatewayResult(packet.query().findChildContent(input == null ? "prompt" : "jid"), null);
            } else {
                Element error = packet.findChild("error");
                callback.onGatewayResult(null, error == null ? null : error.findChildContent("text"));
            }
        });
    }

    public void fetchCaps(Account account, final Jid jid, final Presence presence) {
        fetchCaps(account, jid, presence, null);
    }

    public void fetchCaps(Account account, final Jid jid, final Presence presence, Runnable cb) {
        final Pair<String, String> key = presence == null ? null : new Pair<>(presence.getHash(), presence.getVer());
        final ServiceDiscoveryResult disco = key == null ? null : getCachedServiceDiscoveryResult(key);

        if (disco != null) {
            presence.setServiceDiscoveryResult(disco);
            final Contact contact = account.getRoster().getContact(jid);
            if (contact.refreshRtpCapability()) {
                syncRoster(account);
            }
            contact.refreshCaps();
            if (disco.hasIdentity("gateway", "pstn")) {
                contact.registerAsPhoneAccount(this);
                mQuickConversationsService.considerSyncBackground(false);
            }
            updateConversationUi(true);
        } else {
            final Iq request = new Iq(Iq.Type.GET);
            request.setTo(jid);
            final String node = presence == null ? null : presence.getNode();
            final String ver = presence == null ? null : presence.getVer();
            final Element query = request.query(Namespace.DISCO_INFO);
            if (node != null && ver != null) {
                query.setAttribute("node", node + "#" + ver);
            }

            Log.d(
                    Config.LOGTAG,
                    account.getJid().asBareJid()
                            + ": making disco request for "
                            + (key == null ? null : key.second)
                            + " to "
                            + jid);
            sendIqPacket(
                    account,
                    request,
                    (response) -> {
                        if (response.getType() == Iq.Type.RESULT) {
                            final ServiceDiscoveryResult discoveryResult =
                                    new ServiceDiscoveryResult(response);
                            if (presence == null || presence.getVer() == null || presence.getVer().equals(discoveryResult.getVer())) {
                                databaseBackend.insertDiscoveryResult(discoveryResult);
                                injectServiceDiscoveryResult(
                                        account.getRoster(),
                                        presence == null ? null : presence.getHash(),
                                        presence == null ? null : presence.getVer(),
                                        jid.getResource(),
                                        discoveryResult);
                                if (discoveryResult.hasIdentity("gateway", "pstn")) {
                                    final Contact contact = account.getRoster().getContact(jid);
                                    contact.registerAsPhoneAccount(this);
                                    mQuickConversationsService.considerSyncBackground(false);
                                }
                                updateConversationUi(true);
                                if (cb != null) cb.run();
                            } else {
                                Log.d(
                                        Config.LOGTAG,
                                        account.getJid().asBareJid()
                                                + ": mismatch in caps for contact "
                                                + jid
                                                + " "
                                                + presence.getVer()
                                                + " vs "
                                                + discoveryResult.getVer());
                            }
                        } else {
                            Log.d(
                                    Config.LOGTAG,
                                    account.getJid().asBareJid()
                                            + ": unable to fetch caps from "
                                            + jid);
                        }
                    });
        }
    }

    public void fetchCommands(Account account, final Jid jid, Consumer<Iq> callback) {
        final var request = mIqGenerator.queryDiscoItems(jid, "http://jabber.org/protocol/commands");
        sendIqPacket(account, request, callback);
    }

    private void injectServiceDiscoveryResult(
            Roster roster, String hash, String ver, String resource, ServiceDiscoveryResult disco) {
        boolean rosterNeedsSync = false;
        for (final Contact contact : roster.getContacts()) {
            boolean serviceDiscoverySet = false;
            Presence onePresence = contact.getPresences().get(resource == null ? "" : resource);
            if (onePresence != null) {
                onePresence.setServiceDiscoveryResult(disco);
                serviceDiscoverySet = true;
            } else if (resource == null && hash == null && ver == null) {
                Presence p = new Presence(Presence.Status.OFFLINE, null, null, null, "");
                p.setServiceDiscoveryResult(disco);
                contact.updatePresence("", p);
                serviceDiscoverySet = true;
            }
            if (hash != null && ver != null) {
                for (final Presence presence : contact.getPresences().getPresences()) {
                    if (hash.equals(presence.getHash()) && ver.equals(presence.getVer())) {
                        presence.setServiceDiscoveryResult(disco);
                        serviceDiscoverySet = true;
                    }
                }
            }
            if (serviceDiscoverySet) {
                rosterNeedsSync |= contact.refreshRtpCapability();
                contact.refreshCaps();
            }
        }
        if (rosterNeedsSync) {
            syncRoster(roster.getAccount());
        }
    }

    public void fetchMamPreferences(final Account account, final OnMamPreferencesFetched callback) {
        final MessageArchiveService.Version version = MessageArchiveService.Version.get(account);
        final Iq request = new Iq(Iq.Type.GET);
        request.addChild("prefs", version.namespace);
        sendIqPacket(
                account,
                request,
                (packet) -> {
                    final Element prefs = packet.findChild("prefs", version.namespace);
                    if (packet.getType() == Iq.Type.RESULT && prefs != null) {
                        callback.onPreferencesFetched(prefs);
                    } else {
                        callback.onPreferencesFetchFailed();
                    }
                });
    }

    public PushManagementService getPushManagementService() {
        return mPushManagementService;
    }

    public void changeStatus(Account account, PresenceTemplate template, String signature) {
        if (!template.getStatusMessage().isEmpty()) {
            databaseBackend.insertPresenceTemplate(template);
        }
        account.setPgpSignature(signature);
        account.setPresenceStatus(template.getStatus());
        account.setPresenceStatusMessage(template.getStatusMessage());
        databaseBackend.updateAccount(account);
        sendPresence(account);
    }

    public List<PresenceTemplate> getPresenceTemplates(Account account) {
        List<PresenceTemplate> templates = databaseBackend.getPresenceTemplates();
        for (PresenceTemplate template : account.getSelfContact().getPresences().asTemplates()) {
            if (!templates.contains(template)) {
                templates.add(0, template);
            }
        }
        return templates;
    }

    public void saveConversationAsBookmark(final Conversation conversation, final String name) {
        final Account account = conversation.getAccount();
        final Bookmark bookmark = new Bookmark(account, conversation.getJid().asBareJid());
        String nick = conversation.getMucOptions().getActualNick();
        if (nick == null) nick = conversation.getJid().getResource();
        if (nick != null && !nick.isEmpty() && !nick.equals(MucOptions.defaultNick(account))) {
            bookmark.setNick(nick);
        }
        if (!TextUtils.isEmpty(name)) {
            bookmark.setBookmarkName(name);
        }
        bookmark.setAutojoin(true);
        createBookmark(account, bookmark);
        bookmark.setConversation(conversation);
    }

    public boolean verifyFingerprints(Contact contact, List<XmppUri.Fingerprint> fingerprints) {
        boolean performedVerification = false;
        final AxolotlService axolotlService = contact.getAccount().getAxolotlService();
        for (XmppUri.Fingerprint fp : fingerprints) {
            if (fp.type == XmppUri.FingerprintType.OMEMO) {
                String fingerprint = "05" + fp.fingerprint.replaceAll("\\s", "");
                FingerprintStatus fingerprintStatus =
                        axolotlService.getFingerprintTrust(fingerprint);
                if (fingerprintStatus != null) {
                    if (!fingerprintStatus.isVerified()) {
                        performedVerification = true;
                        axolotlService.setFingerprintTrust(
                                fingerprint, fingerprintStatus.toVerified());
                    }
                } else {
                    axolotlService.preVerifyFingerprint(contact, fingerprint);
                }
            }
        }
        return performedVerification;
    }

    public boolean verifyFingerprints(Account account, List<XmppUri.Fingerprint> fingerprints) {
        final AxolotlService axolotlService = account.getAxolotlService();
        boolean verifiedSomething = false;
        for (XmppUri.Fingerprint fp : fingerprints) {
            if (fp.type == XmppUri.FingerprintType.OMEMO) {
                String fingerprint = "05" + fp.fingerprint.replaceAll("\\s", "");
                Log.d(Config.LOGTAG, "trying to verify own fp=" + fingerprint);
                FingerprintStatus fingerprintStatus =
                        axolotlService.getFingerprintTrust(fingerprint);
                if (fingerprintStatus != null) {
                    if (!fingerprintStatus.isVerified()) {
                        axolotlService.setFingerprintTrust(
                                fingerprint, fingerprintStatus.toVerified());
                        verifiedSomething = true;
                    }
                } else {
                    axolotlService.preVerifyFingerprint(account, fingerprint);
                    verifiedSomething = true;
                }
            }
        }
        return verifiedSomething;
    }

    public ShortcutService getShortcutService() {
        return mShortcutService;
    }

    public void pushMamPreferences(Account account, Element prefs) {
        final Iq set = new Iq(Iq.Type.SET);
        set.addChild(prefs);
        account.setMamPrefs(prefs);
        sendIqPacket(account, set, null);
    }

    public void evictPreview(File f) {
        if (f == null) return;

        if (mDrawableCache.remove(f.getAbsolutePath()) != null) {
            Log.d(Config.LOGTAG, "deleted cached preview");
        }
    }

    public void evictPreview(String uuid) {
        if (mDrawableCache.remove(uuid) != null) {
            Log.d(Config.LOGTAG, "deleted cached preview");
        }
    }

    public interface OnMamPreferencesFetched {
        void onPreferencesFetched(Element prefs);

        void onPreferencesFetchFailed();
    }

    public interface OnAccountCreated {
        void onAccountCreated(Account account);

        void informUser(int r);
    }

    public interface OnMoreMessagesLoaded {
        void onMoreMessagesLoaded(int count, Conversation conversation);

        void informUser(int r);
    }

    public interface OnAccountPasswordChanged {
        void onPasswordChangeSucceeded();

        void onPasswordChangeFailed();
    }

    public interface OnRoomDestroy {
        void onRoomDestroySucceeded();

        void onRoomDestroyFailed();
    }

    public interface OnAffiliationChanged {
        void onAffiliationChangedSuccessful(Jid jid);

        void onAffiliationChangeFailed(Jid jid, int resId);
    }

    public interface OnConversationUpdate {
        default void onConversationUpdate() { onConversationUpdate(false); }
        default void onConversationUpdate(boolean newCaps) { onConversationUpdate(); }
    }

    public interface OnJingleRtpConnectionUpdate {
        void onJingleRtpConnectionUpdate(
                final Account account,
                final Jid with,
                final String sessionId,
                final RtpEndUserState state);

        void onAudioDeviceChanged(
                CallIntegration.AudioDevice selectedAudioDevice,
                Set<CallIntegration.AudioDevice> availableAudioDevices);
    }

    public interface OnAccountUpdate {
        void onAccountUpdate();
    }

    public interface OnCaptchaRequested {
        void onCaptchaRequested(Account account, String id, Data data, Bitmap captcha);
    }

    public interface OnRosterUpdate {
        void onRosterUpdate(final UpdateRosterReason reason, final Contact contact);
    }

    public interface OnMucRosterUpdate {
        void onMucRosterUpdate();
    }

    public interface OnConferenceConfigurationFetched {
        void onConferenceConfigurationFetched(Conversation conversation);

        void onFetchFailed(Conversation conversation, String errorCondition);
    }

    public interface OnConferenceJoined {
        void onConferenceJoined(Conversation conversation);
    }

    public interface OnConfigurationPushed {
        void onPushSucceeded();

        void onPushFailed();
    }

    public interface OnShowErrorToast {
        void onShowErrorToast(int resId);
    }

    public class XmppConnectionBinder extends Binder {
        public XmppConnectionService getService() {
            return XmppConnectionService.this;
        }
    }

    private class InternalEventReceiver extends BroadcastReceiver {

        @Override
        public void onReceive(final Context context, final Intent intent) {
            onStartCommand(intent, 0, 0);
        }
    }

    private class RestrictedEventReceiver extends BroadcastReceiver {

        private final Collection<String> allowedActions;

        private RestrictedEventReceiver(final Collection<String> allowedActions) {
            this.allowedActions = allowedActions;
        }

        @Override
        public void onReceive(final Context context, final Intent intent) {
            final String action = intent == null ? null : intent.getAction();
            if (allowedActions.contains(action)) {
                onStartCommand(intent, 0, 0);
            } else {
                Log.e(Config.LOGTAG, "restricting broadcast of event " + action);
            }
        }
    }

    public static class OngoingCall {
        public final AbstractJingleConnection.Id id;
        public final Set<Media> media;
        public final boolean reconnecting;

        public OngoingCall(
                AbstractJingleConnection.Id id, Set<Media> media, final boolean reconnecting) {
            this.id = id;
            this.media = media;
            this.reconnecting = reconnecting;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) return true;
            if (o == null || getClass() != o.getClass()) return false;
            OngoingCall that = (OngoingCall) o;
            return reconnecting == that.reconnecting
                    && Objects.equal(id, that.id)
                    && Objects.equal(media, that.media);
        }

        @Override
        public int hashCode() {
            return Objects.hashCode(id, media, reconnecting);
        }
    }

    public static void toggleForegroundService(final XmppConnectionService service) {
        if (service == null) {
            return;
        }
        service.toggleForegroundService();
    }

    public static void toggleForegroundService(final ConversationsActivity activity) {
        if (activity == null) {
            return;
        }
        toggleForegroundService(activity.xmppConnectionService);
    }

    public static class BlockedMediaException extends Exception { }

    public static enum UpdateRosterReason {
        INIT,
        AVATAR,
        PUSH,
        PRESENCE
    }
}