XmppConnectionService.java

   1package eu.siacs.conversations.services;
   2
   3import java.security.SecureRandom;
   4import java.text.SimpleDateFormat;
   5import java.util.ArrayList;
   6import java.util.Collections;
   7import java.util.Comparator;
   8import java.util.Date;
   9import java.util.Hashtable;
  10import java.util.List;
  11import java.util.Locale;
  12import java.util.TimeZone;
  13import java.util.concurrent.CopyOnWriteArrayList;
  14
  15import org.openintents.openpgp.util.OpenPgpApi;
  16import org.openintents.openpgp.util.OpenPgpServiceConnection;
  17
  18import de.duenndns.ssl.MemorizingTrustManager;
  19
  20import net.java.otr4j.OtrException;
  21import net.java.otr4j.session.Session;
  22import net.java.otr4j.session.SessionID;
  23import net.java.otr4j.session.SessionStatus;
  24import eu.siacs.conversations.Config;
  25import eu.siacs.conversations.R;
  26import eu.siacs.conversations.crypto.PgpEngine;
  27import eu.siacs.conversations.entities.Account;
  28import eu.siacs.conversations.entities.Bookmark;
  29import eu.siacs.conversations.entities.Contact;
  30import eu.siacs.conversations.entities.Conversation;
  31import eu.siacs.conversations.entities.Downloadable;
  32import eu.siacs.conversations.entities.Message;
  33import eu.siacs.conversations.entities.MucOptions;
  34import eu.siacs.conversations.entities.MucOptions.OnRenameListener;
  35import eu.siacs.conversations.entities.Presences;
  36import eu.siacs.conversations.generator.IqGenerator;
  37import eu.siacs.conversations.generator.MessageGenerator;
  38import eu.siacs.conversations.generator.PresenceGenerator;
  39import eu.siacs.conversations.http.HttpConnectionManager;
  40import eu.siacs.conversations.parser.IqParser;
  41import eu.siacs.conversations.parser.MessageParser;
  42import eu.siacs.conversations.parser.PresenceParser;
  43import eu.siacs.conversations.persistance.DatabaseBackend;
  44import eu.siacs.conversations.persistance.FileBackend;
  45import eu.siacs.conversations.ui.UiCallback;
  46import eu.siacs.conversations.utils.CryptoHelper;
  47import eu.siacs.conversations.utils.ExceptionHelper;
  48import eu.siacs.conversations.utils.OnPhoneContactsLoadedListener;
  49import eu.siacs.conversations.utils.PRNGFixes;
  50import eu.siacs.conversations.utils.PhoneHelper;
  51import eu.siacs.conversations.utils.UIHelper;
  52import eu.siacs.conversations.xml.Element;
  53import eu.siacs.conversations.xmpp.OnBindListener;
  54import eu.siacs.conversations.xmpp.OnContactStatusChanged;
  55import eu.siacs.conversations.xmpp.OnIqPacketReceived;
  56import eu.siacs.conversations.xmpp.OnMessageAcknowledged;
  57import eu.siacs.conversations.xmpp.OnStatusChanged;
  58import eu.siacs.conversations.xmpp.XmppConnection;
  59import eu.siacs.conversations.xmpp.jid.InvalidJidException;
  60import eu.siacs.conversations.xmpp.jid.Jid;
  61import eu.siacs.conversations.xmpp.jingle.JingleConnectionManager;
  62import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
  63import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
  64import eu.siacs.conversations.xmpp.pep.Avatar;
  65import eu.siacs.conversations.xmpp.stanzas.IqPacket;
  66import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
  67import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
  68import android.annotation.SuppressLint;
  69import android.app.AlarmManager;
  70import android.app.PendingIntent;
  71import android.app.Service;
  72import android.content.Context;
  73import android.content.Intent;
  74import android.content.SharedPreferences;
  75import android.database.ContentObserver;
  76import android.graphics.Bitmap;
  77import android.net.ConnectivityManager;
  78import android.net.NetworkInfo;
  79import android.net.Uri;
  80import android.os.Binder;
  81import android.os.Bundle;
  82import android.os.FileObserver;
  83import android.os.IBinder;
  84import android.os.PowerManager;
  85import android.os.PowerManager.WakeLock;
  86import android.os.SystemClock;
  87import android.preference.PreferenceManager;
  88import android.provider.ContactsContract;
  89import android.util.Log;
  90import android.util.LruCache;
  91
  92public class XmppConnectionService extends Service {
  93
  94	public DatabaseBackend databaseBackend;
  95	private FileBackend fileBackend = new FileBackend(this);
  96
  97	private static String ACTION_MERGE_PHONE_CONTACTS = "merge_phone_contacts";
  98	public static String ACTION_CLEAR_NOTIFICATION = "clear_notification";
  99
 100	private MemorizingTrustManager mMemorizingTrustManager;
 101
 102	private NotificationService mNotificationService = new NotificationService(
 103			this);
 104
 105	private MessageParser mMessageParser = new MessageParser(this);
 106	private PresenceParser mPresenceParser = new PresenceParser(this);
 107	private IqParser mIqParser = new IqParser(this);
 108	private MessageGenerator mMessageGenerator = new MessageGenerator(this);
 109	private PresenceGenerator mPresenceGenerator = new PresenceGenerator(this);
 110
 111	private List<Account> accounts;
 112	private CopyOnWriteArrayList<Conversation> conversations = null;
 113	private JingleConnectionManager mJingleConnectionManager = new JingleConnectionManager(
 114			this);
 115	private HttpConnectionManager mHttpConnectionManager = new HttpConnectionManager(
 116			this);
 117	private AvatarService mAvatarService = new AvatarService(this);
 118
 119	private OnConversationUpdate mOnConversationUpdate = null;
 120	private Integer convChangedListenerCount = 0;
 121	private OnAccountUpdate mOnAccountUpdate = null;
 122	private Integer accountChangedListenerCount = 0;
 123	private OnRosterUpdate mOnRosterUpdate = null;
 124	private Integer rosterChangedListenerCount = 0;
 125	public OnContactStatusChanged onContactStatusChanged = new OnContactStatusChanged() {
 126
 127		@Override
 128		public void onContactStatusChanged(Contact contact, boolean online) {
 129			Conversation conversation = find(getConversations(), contact);
 130			if (conversation != null) {
 131				if (online && contact.getPresences().size() > 1) {
 132					conversation.endOtrIfNeeded();
 133				} else {
 134					conversation.resetOtrSession();
 135				}
 136				if (online && (contact.getPresences().size() == 1)) {
 137					sendUnsendMessages(conversation);
 138				}
 139			}
 140		}
 141	};
 142
 143	private SecureRandom mRandom;
 144
 145	private ContentObserver contactObserver = new ContentObserver(null) {
 146		@Override
 147		public void onChange(boolean selfChange) {
 148			super.onChange(selfChange);
 149			Intent intent = new Intent(getApplicationContext(),
 150					XmppConnectionService.class);
 151			intent.setAction(ACTION_MERGE_PHONE_CONTACTS);
 152			startService(intent);
 153		}
 154	};
 155
 156	private FileObserver fileObserver = new FileObserver(
 157			FileBackend.getConversationsDirectory()) {
 158
 159		@Override
 160		public void onEvent(int event, String path) {
 161			if (event == FileObserver.DELETE) {
 162				markFileDeleted(path.split("\\.")[0]);
 163			}
 164		}
 165	};
 166
 167	private final IBinder mBinder = new XmppConnectionBinder();
 168	private OnStatusChanged statusListener = new OnStatusChanged() {
 169
 170		@Override
 171		public void onStatusChanged(Account account) {
 172			XmppConnection connection = account.getXmppConnection();
 173			if (mOnAccountUpdate != null) {
 174				mOnAccountUpdate.onAccountUpdate();
 175			}
 176			if (account.getStatus() == Account.STATUS_ONLINE) {
 177				for (Conversation conversation : account.pendingConferenceLeaves) {
 178					leaveMuc(conversation);
 179				}
 180				for (Conversation conversation : account.pendingConferenceJoins) {
 181					joinMuc(conversation);
 182				}
 183				mJingleConnectionManager.cancelInTransmission();
 184				List<Conversation> conversations = getConversations();
 185                for (Conversation conversation : conversations) {
 186                    if (conversation.getAccount() == account) {
 187                        conversation.startOtrIfNeeded();
 188                        sendUnsendMessages(conversation);
 189                    }
 190                }
 191				if (connection != null && connection.getFeatures().csi()) {
 192					if (checkListeners()) {
 193						Log.d(Config.LOGTAG, account.getJid().toBareJid()
 194								+ " sending csi//inactive");
 195						connection.sendInactive();
 196					} else {
 197						Log.d(Config.LOGTAG, account.getJid().toBareJid()
 198								+ " sending csi//active");
 199						connection.sendActive();
 200					}
 201				}
 202				syncDirtyContacts(account);
 203				scheduleWakeupCall(Config.PING_MAX_INTERVAL, true);
 204			} else if (account.getStatus() == Account.STATUS_OFFLINE) {
 205				resetSendingToWaiting(account);
 206				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 207					int timeToReconnect = mRandom.nextInt(50) + 10;
 208					scheduleWakeupCall(timeToReconnect, false);
 209				}
 210			} else if (account.getStatus() == Account.STATUS_REGISTRATION_SUCCESSFULL) {
 211				databaseBackend.updateAccount(account);
 212				reconnectAccount(account, true);
 213			} else if ((account.getStatus() != Account.STATUS_CONNECTING)
 214					&& (account.getStatus() != Account.STATUS_NO_INTERNET)) {
 215				if (connection != null) {
 216					int next = connection.getTimeToNextAttempt();
 217					Log.d(Config.LOGTAG, account.getJid().toBareJid()
 218							+ ": error connecting account. try again in "
 219							+ next + "s for the "
 220							+ (connection.getAttempt() + 1) + " time");
 221					scheduleWakeupCall((int) (next * 1.2), false);
 222				}
 223			}
 224			UIHelper.showErrorNotification(getApplicationContext(),
 225					getAccounts());
 226		}
 227	};
 228
 229	private OnJinglePacketReceived jingleListener = new OnJinglePacketReceived() {
 230
 231		@Override
 232		public void onJinglePacketReceived(Account account, JinglePacket packet) {
 233			mJingleConnectionManager.deliverPacket(account, packet);
 234		}
 235	};
 236
 237	private OpenPgpServiceConnection pgpServiceConnection;
 238	private PgpEngine mPgpEngine = null;
 239	private Intent pingIntent;
 240	private PendingIntent pendingPingIntent = null;
 241	private WakeLock wakeLock;
 242	private PowerManager pm;
 243	private OnBindListener mOnBindListener = new OnBindListener() {
 244
 245		@Override
 246		public void onBind(final Account account) {
 247			account.getRoster().clearPresences();
 248			account.clearPresences(); // self presences
 249			account.pendingConferenceJoins.clear();
 250			account.pendingConferenceLeaves.clear();
 251			fetchRosterFromServer(account);
 252			fetchBookmarks(account);
 253			sendPresencePacket(account,
 254					mPresenceGenerator.sendPresence(account));
 255			connectMultiModeConversations(account);
 256			updateConversationUi();
 257		}
 258	};
 259
 260	private OnMessageAcknowledged mOnMessageAcknowledgedListener = new OnMessageAcknowledged() {
 261
 262		@Override
 263		public void onMessageAcknowledged(Account account, String uuid) {
 264			for (Conversation conversation : getConversations()) {
 265				if (conversation.getAccount() == account) {
 266					for (Message message : conversation.getMessages()) {
 267						if ((message.getStatus() == Message.STATUS_UNSEND || message
 268								.getStatus() == Message.STATUS_WAITING)
 269								&& message.getUuid().equals(uuid)) {
 270							markMessage(message, Message.STATUS_SEND);
 271							return;
 272						}
 273					}
 274				}
 275			}
 276		}
 277	};
 278	private LruCache<String, Bitmap> mBitmapCache;
 279
 280	public PgpEngine getPgpEngine() {
 281		if (pgpServiceConnection.isBound()) {
 282			if (this.mPgpEngine == null) {
 283				this.mPgpEngine = new PgpEngine(new OpenPgpApi(
 284						getApplicationContext(),
 285						pgpServiceConnection.getService()), this);
 286			}
 287			return mPgpEngine;
 288		} else {
 289			return null;
 290		}
 291
 292	}
 293
 294	public FileBackend getFileBackend() {
 295		return this.fileBackend;
 296	}
 297
 298	public AvatarService getAvatarService() {
 299		return this.mAvatarService;
 300	}
 301
 302	public Message attachImageToConversation(final Conversation conversation,
 303			final Uri uri, final UiCallback<Message> callback) {
 304		final Message message;
 305		if (conversation.getNextEncryption(forceEncryption()) == Message.ENCRYPTION_PGP) {
 306			message = new Message(conversation, "",
 307					Message.ENCRYPTION_DECRYPTED);
 308		} else {
 309			message = new Message(conversation, "",
 310					conversation.getNextEncryption(forceEncryption()));
 311		}
 312		message.setCounterpart(conversation.getNextCounterpart());
 313		message.setType(Message.TYPE_IMAGE);
 314		message.setStatus(Message.STATUS_OFFERED);
 315		new Thread(new Runnable() {
 316
 317			@Override
 318			public void run() {
 319				try {
 320					getFileBackend().copyImageToPrivateStorage(message, uri);
 321					if (conversation.getNextEncryption(forceEncryption()) == Message.ENCRYPTION_PGP) {
 322						getPgpEngine().encrypt(message, callback);
 323					} else {
 324						callback.success(message);
 325					}
 326				} catch (FileBackend.ImageCopyException e) {
 327					callback.error(e.getResId(), message);
 328				}
 329			}
 330		}).start();
 331		return message;
 332	}
 333
 334	public Conversation find(Bookmark bookmark) {
 335		return find(bookmark.getAccount(), bookmark.getJid());
 336	}
 337
 338	public Conversation find(final Account account, final Jid jid) {
 339		return find(getConversations(), account, jid);
 340	}
 341
 342	public class XmppConnectionBinder extends Binder {
 343		public XmppConnectionService getService() {
 344			return XmppConnectionService.this;
 345		}
 346	}
 347
 348	@Override
 349	public int onStartCommand(Intent intent, int flags, int startId) {
 350		if (intent != null && intent.getAction() != null) {
 351			if (intent.getAction().equals(ACTION_MERGE_PHONE_CONTACTS)) {
 352				mergePhoneContactsWithRoster();
 353				return START_STICKY;
 354			} else if (intent.getAction().equals(Intent.ACTION_SHUTDOWN)) {
 355				logoutAndSave();
 356				return START_NOT_STICKY;
 357			} else if (intent.getAction().equals(ACTION_CLEAR_NOTIFICATION)) {
 358				mNotificationService.clear();
 359			}
 360		}
 361		this.wakeLock.acquire();
 362
 363		for (Account account : accounts) {
 364			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 365				if (!hasInternetConnection()) {
 366					account.setStatus(Account.STATUS_NO_INTERNET);
 367					if (statusListener != null) {
 368						statusListener.onStatusChanged(account);
 369					}
 370				} else {
 371					if (account.getStatus() == Account.STATUS_NO_INTERNET) {
 372						account.setStatus(Account.STATUS_OFFLINE);
 373						if (statusListener != null) {
 374							statusListener.onStatusChanged(account);
 375						}
 376					}
 377					if (account.getStatus() == Account.STATUS_ONLINE) {
 378						long lastReceived = account.getXmppConnection()
 379								.getLastPacketReceived();
 380						long lastSent = account.getXmppConnection()
 381								.getLastPingSent();
 382						if (lastSent - lastReceived >= Config.PING_TIMEOUT * 1000) {
 383							Log.d(Config.LOGTAG, account.getJid()
 384									+ ": ping timeout");
 385							this.reconnectAccount(account, true);
 386						} else if (SystemClock.elapsedRealtime() - lastReceived >= Config.PING_MIN_INTERVAL * 1000) {
 387							account.getXmppConnection().sendPing();
 388							this.scheduleWakeupCall(2, false);
 389						}
 390					} else if (account.getStatus() == Account.STATUS_OFFLINE) {
 391						if (account.getXmppConnection() == null) {
 392							account.setXmppConnection(this
 393									.createConnection(account));
 394						}
 395						new Thread(account.getXmppConnection()).start();
 396					} else if ((account.getStatus() == Account.STATUS_CONNECTING)
 397							&& ((SystemClock.elapsedRealtime() - account
 398									.getXmppConnection().getLastConnect()) / 1000 >= Config.CONNECT_TIMEOUT)) {
 399						Log.d(Config.LOGTAG, account.getJid()
 400								+ ": time out during connect reconnecting");
 401						reconnectAccount(account, true);
 402					} else {
 403						if (account.getXmppConnection().getTimeToNextAttempt() <= 0) {
 404							reconnectAccount(account, true);
 405						}
 406					}
 407					// in any case. reschedule wakup call
 408					this.scheduleWakeupCall(Config.PING_MAX_INTERVAL, true);
 409				}
 410				if (mOnAccountUpdate != null) {
 411					mOnAccountUpdate.onAccountUpdate();
 412				}
 413			}
 414		}
 415		if (wakeLock.isHeld()) {
 416			try {
 417				wakeLock.release();
 418			} catch (final RuntimeException ignored) {
 419			}
 420		}
 421		return START_STICKY;
 422	}
 423
 424	public boolean hasInternetConnection() {
 425		ConnectivityManager cm = (ConnectivityManager) getApplicationContext()
 426				.getSystemService(Context.CONNECTIVITY_SERVICE);
 427		NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
 428		return activeNetwork != null && activeNetwork.isConnected();
 429	}
 430
 431	@SuppressLint("TrulyRandom")
 432	@Override
 433	public void onCreate() {
 434		ExceptionHelper.init(getApplicationContext());
 435		PRNGFixes.apply();
 436		this.mRandom = new SecureRandom();
 437		this.mMemorizingTrustManager = new MemorizingTrustManager(
 438				getApplicationContext());
 439
 440		int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
 441		int cacheSize = maxMemory / 8;
 442		this.mBitmapCache = new LruCache<String, Bitmap>(cacheSize) {
 443			@Override
 444			protected int sizeOf(String key, Bitmap bitmap) {
 445				return bitmap.getByteCount() / 1024;
 446			}
 447		};
 448
 449		this.databaseBackend = DatabaseBackend
 450				.getInstance(getApplicationContext());
 451		this.accounts = databaseBackend.getAccounts();
 452
 453		for (Account account : this.accounts) {
 454			this.databaseBackend.readRoster(account.getRoster());
 455		}
 456		this.mergePhoneContactsWithRoster();
 457		this.getConversations();
 458
 459		getContentResolver().registerContentObserver(
 460				ContactsContract.Contacts.CONTENT_URI, true, contactObserver);
 461		this.fileObserver.startWatching();
 462		this.pgpServiceConnection = new OpenPgpServiceConnection(
 463				getApplicationContext(), "org.sufficientlysecure.keychain");
 464		this.pgpServiceConnection.bindToService();
 465
 466		this.pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
 467		this.wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
 468				"XmppConnectionService");
 469	}
 470
 471	@Override
 472	public void onDestroy() {
 473		super.onDestroy();
 474		this.logoutAndSave();
 475	}
 476
 477	@Override
 478	public void onTaskRemoved(Intent rootIntent) {
 479		super.onTaskRemoved(rootIntent);
 480		this.logoutAndSave();
 481	}
 482
 483	private void logoutAndSave() {
 484		for (Account account : accounts) {
 485			databaseBackend.writeRoster(account.getRoster());
 486			if (account.getXmppConnection() != null) {
 487				disconnect(account, false);
 488			}
 489		}
 490		Context context = getApplicationContext();
 491		AlarmManager alarmManager = (AlarmManager) context
 492				.getSystemService(Context.ALARM_SERVICE);
 493		Intent intent = new Intent(context, EventReceiver.class);
 494		alarmManager.cancel(PendingIntent.getBroadcast(context, 0, intent, 0));
 495		Log.d(Config.LOGTAG, "good bye");
 496		stopSelf();
 497	}
 498
 499	protected void scheduleWakeupCall(int seconds, boolean ping) {
 500		long timeToWake = SystemClock.elapsedRealtime() + seconds * 1000;
 501		Context context = getApplicationContext();
 502		AlarmManager alarmManager = (AlarmManager) context
 503				.getSystemService(Context.ALARM_SERVICE);
 504
 505		if (ping) {
 506			if (this.pingIntent == null) {
 507				this.pingIntent = new Intent(context, EventReceiver.class);
 508				this.pingIntent.setAction("ping");
 509				this.pingIntent.putExtra("time", timeToWake);
 510				this.pendingPingIntent = PendingIntent.getBroadcast(context, 0,
 511						this.pingIntent, 0);
 512				alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 513						timeToWake, pendingPingIntent);
 514			} else {
 515				long scheduledTime = this.pingIntent.getLongExtra("time", 0);
 516				if (scheduledTime < SystemClock.elapsedRealtime()
 517						|| (scheduledTime > timeToWake)) {
 518					this.pingIntent.putExtra("time", timeToWake);
 519					alarmManager.cancel(this.pendingPingIntent);
 520					this.pendingPingIntent = PendingIntent.getBroadcast(
 521							context, 0, this.pingIntent, 0);
 522					alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 523							timeToWake, pendingPingIntent);
 524				}
 525			}
 526		} else {
 527			Intent intent = new Intent(context, EventReceiver.class);
 528			intent.setAction("ping_check");
 529			PendingIntent alarmIntent = PendingIntent.getBroadcast(context, 0,
 530					intent, 0);
 531			alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake,
 532					alarmIntent);
 533		}
 534
 535	}
 536
 537	public XmppConnection createConnection(Account account) {
 538		SharedPreferences sharedPref = getPreferences();
 539        account.setResource(sharedPref.getString("resource", "mobile")
 540                .toLowerCase(Locale.getDefault()));
 541        XmppConnection connection = new XmppConnection(account, this);
 542		connection.setOnMessagePacketReceivedListener(this.mMessageParser);
 543		connection.setOnStatusChangedListener(this.statusListener);
 544		connection.setOnPresencePacketReceivedListener(this.mPresenceParser);
 545		connection.setOnUnregisteredIqPacketReceivedListener(this.mIqParser);
 546		connection.setOnJinglePacketReceivedListener(this.jingleListener);
 547		connection.setOnBindListener(this.mOnBindListener);
 548		connection
 549				.setOnMessageAcknowledgeListener(this.mOnMessageAcknowledgedListener);
 550		return connection;
 551	}
 552
 553	public void sendMessage(Message message) {
 554		Account account = message.getConversation().getAccount();
 555		account.deactivateGracePeriod();
 556		Conversation conv = message.getConversation();
 557		MessagePacket packet = null;
 558		boolean saveInDb = true;
 559		boolean send = false;
 560		if (account.getStatus() == Account.STATUS_ONLINE
 561				&& account.getXmppConnection() != null) {
 562			if (message.getType() == Message.TYPE_IMAGE) {
 563				if (message.getCounterpart() != null) {
 564					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 565						if (!conv.hasValidOtrSession()) {
 566							conv.startOtrSession(this, message.getCounterpart().getResourcepart(),
 567									true);
 568							message.setStatus(Message.STATUS_WAITING);
 569						} else if (conv.hasValidOtrSession()
 570								&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 571							mJingleConnectionManager
 572									.createNewConnection(message);
 573						}
 574					} else {
 575						mJingleConnectionManager.createNewConnection(message);
 576					}
 577				} else {
 578					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 579						conv.startOtrIfNeeded();
 580					}
 581					message.setStatus(Message.STATUS_WAITING);
 582				}
 583			} else {
 584				if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 585					if (!conv.hasValidOtrSession()&& (message.getCounterpart() != null)) {
 586						conv.startOtrSession(this, message.getCounterpart().getResourcepart(), true);
 587						message.setStatus(Message.STATUS_WAITING);
 588					} else if (conv.hasValidOtrSession()
 589							&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 590						SessionID id = conv.getOtrSession().getSessionID();
 591						try {
 592							message.setCounterpart(Jid.fromString(id.getAccountID() + "/" + id.getUserID()));
 593						} catch (final InvalidJidException e) {
 594							message.setCounterpart(null);
 595						}
 596						packet = mMessageGenerator.generateOtrChat(message);
 597						send = true;
 598
 599					} else if (message.getCounterpart() == null) {
 600						conv.startOtrIfNeeded();
 601						message.setStatus(Message.STATUS_WAITING);
 602					}
 603				} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 604					message.getConversation().endOtrIfNeeded();
 605					failWaitingOtrMessages(message.getConversation());
 606					packet = mMessageGenerator.generatePgpChat(message);
 607					send = true;
 608				} else {
 609					message.getConversation().endOtrIfNeeded();
 610					failWaitingOtrMessages(message.getConversation());
 611					packet = mMessageGenerator.generateChat(message);
 612					send = true;
 613				}
 614			}
 615			if (!account.getXmppConnection().getFeatures().sm()
 616					&& conv.getMode() != Conversation.MODE_MULTI) {
 617				message.setStatus(Message.STATUS_SEND);
 618			}
 619		} else {
 620			message.setStatus(Message.STATUS_WAITING);
 621			if (message.getType() == Message.TYPE_TEXT) {
 622				if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 623					String pgpBody = message.getEncryptedBody();
 624					String decryptedBody = message.getBody();
 625					message.setBody(pgpBody);
 626					message.setEncryption(Message.ENCRYPTION_PGP);
 627					databaseBackend.createMessage(message);
 628					saveInDb = false;
 629					message.setBody(decryptedBody);
 630					message.setEncryption(Message.ENCRYPTION_DECRYPTED);
 631				} else if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 632					if (conv.hasValidOtrSession()) {
 633						SessionID id = conv.getOtrSession().getSessionID();
 634						try {
 635							message.setCounterpart(Jid.fromString(id.getAccountID() + "/" + id.getUserID()));
 636						} catch (final InvalidJidException e) {
 637							message.setCounterpart(null);
 638						}
 639					} else if (!conv.hasValidOtrSession()
 640							&& message.getCounterpart() != null) {
 641						conv.startOtrSession(this, message.getCounterpart().getResourcepart(), false);
 642					}
 643				}
 644			}
 645
 646		}
 647		conv.add(message);
 648		if (saveInDb) {
 649			if (message.getEncryption() == Message.ENCRYPTION_NONE
 650					|| saveEncryptedMessages()) {
 651				databaseBackend.createMessage(message);
 652			}
 653		}
 654		if ((send) && (packet != null)) {
 655			sendMessagePacket(account, packet);
 656		}
 657		updateConversationUi();
 658	}
 659
 660	private void sendUnsendMessages(Conversation conversation) {
 661		for (int i = 0; i < conversation.getMessages().size(); ++i) {
 662			int status = conversation.getMessages().get(i).getStatus();
 663			if (status == Message.STATUS_WAITING) {
 664				resendMessage(conversation.getMessages().get(i));
 665			}
 666		}
 667	}
 668
 669	private void resendMessage(Message message) {
 670		Account account = message.getConversation().getAccount();
 671		MessagePacket packet = null;
 672		if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 673			Presences presences = message.getConversation().getContact()
 674					.getPresences();
 675			if (!message.getConversation().hasValidOtrSession()) {
 676				if ((message.getCounterpart() != null)
 677						&& (presences.has(message.getCounterpart().getResourcepart()))) {
 678					message.getConversation().startOtrSession(this,
 679							message.getCounterpart().getResourcepart(), true);
 680				} else {
 681					if (presences.size() == 1) {
 682						String presence = presences.asStringArray()[0];
 683						message.getConversation().startOtrSession(this,
 684								presence, true);
 685					}
 686				}
 687			} else {
 688				if (message.getConversation().getOtrSession()
 689						.getSessionStatus() == SessionStatus.ENCRYPTED) {
 690					if (message.getType() == Message.TYPE_TEXT) {
 691						packet = mMessageGenerator.generateOtrChat(message,
 692								true);
 693					} else if (message.getType() == Message.TYPE_IMAGE) {
 694						mJingleConnectionManager.createNewConnection(message);
 695					}
 696				}
 697			}
 698		} else if (message.getType() == Message.TYPE_TEXT) {
 699			if (message.getEncryption() == Message.ENCRYPTION_NONE) {
 700				packet = mMessageGenerator.generateChat(message, true);
 701			} else if ((message.getEncryption() == Message.ENCRYPTION_DECRYPTED)
 702					|| (message.getEncryption() == Message.ENCRYPTION_PGP)) {
 703				packet = mMessageGenerator.generatePgpChat(message, true);
 704			}
 705		} else if (message.getType() == Message.TYPE_IMAGE) {
 706			Contact contact = message.getConversation().getContact();
 707			Presences presences = contact.getPresences();
 708			if ((message.getCounterpart() != null)
 709					&& (presences.has(message.getCounterpart().getResourcepart()))) {
 710				markMessage(message, Message.STATUS_OFFERED);
 711				mJingleConnectionManager.createNewConnection(message);
 712			} else {
 713				if (presences.size() == 1) {
 714					String presence = presences.asStringArray()[0];
 715					try {
 716						message.setCounterpart(Jid.fromParts(contact.getJid().getLocalpart(), contact.getJid().getDomainpart(), presence));
 717					} catch (InvalidJidException e) {
 718						return;
 719					}
 720					markMessage(message, Message.STATUS_OFFERED);
 721					mJingleConnectionManager.createNewConnection(message);
 722				}
 723			}
 724		}
 725		if (packet != null) {
 726			if (!account.getXmppConnection().getFeatures().sm()
 727					&& message.getConversation().getMode() != Conversation.MODE_MULTI) {
 728				markMessage(message, Message.STATUS_SEND);
 729			} else {
 730				markMessage(message, Message.STATUS_UNSEND);
 731			}
 732			sendMessagePacket(account, packet);
 733		}
 734	}
 735
 736	public void fetchRosterFromServer(Account account) {
 737		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
 738		if (!"".equals(account.getRosterVersion())) {
 739			Log.d(Config.LOGTAG, account.getJid().toBareJid()
 740					+ ": fetching roster version " + account.getRosterVersion());
 741		} else {
 742			Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": fetching roster");
 743		}
 744		iqPacket.query("jabber:iq:roster").setAttribute("ver",
 745				account.getRosterVersion());
 746		account.getXmppConnection().sendIqPacket(iqPacket,
 747				new OnIqPacketReceived() {
 748
 749					@Override
 750					public void onIqPacketReceived(final Account account,
 751							IqPacket packet) {
 752						Element query = packet.findChild("query");
 753						if (query != null) {
 754							account.getRoster().markAllAsNotInRoster();
 755							mIqParser.rosterItems(account, query);
 756						}
 757					}
 758				});
 759	}
 760
 761	public void fetchBookmarks(Account account) {
 762		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
 763		Element query = iqPacket.query("jabber:iq:private");
 764		query.addChild("storage", "storage:bookmarks");
 765		OnIqPacketReceived callback = new OnIqPacketReceived() {
 766
 767			@Override
 768			public void onIqPacketReceived(Account account, IqPacket packet) {
 769				Element query = packet.query();
 770				List<Bookmark> bookmarks = new CopyOnWriteArrayList<>();
 771				Element storage = query.findChild("storage",
 772						"storage:bookmarks");
 773				if (storage != null) {
 774					for (Element item : storage.getChildren()) {
 775						if (item.getName().equals("conference")) {
 776							Bookmark bookmark = Bookmark.parse(item, account);
 777							bookmarks.add(bookmark);
 778							Conversation conversation = find(bookmark);
 779							if (conversation != null) {
 780								conversation.setBookmark(bookmark);
 781							} else {
 782								if (bookmark.autojoin()) {
 783									conversation = findOrCreateConversation(
 784											account, bookmark.getJid(), true);
 785									conversation.setBookmark(bookmark);
 786									joinMuc(conversation);
 787								}
 788							}
 789						}
 790					}
 791				}
 792				account.setBookmarks(bookmarks);
 793			}
 794		};
 795		sendIqPacket(account, iqPacket, callback);
 796
 797	}
 798
 799	public void pushBookmarks(Account account) {
 800		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_SET);
 801		Element query = iqPacket.query("jabber:iq:private");
 802		Element storage = query.addChild("storage", "storage:bookmarks");
 803		for (Bookmark bookmark : account.getBookmarks()) {
 804			storage.addChild(bookmark);
 805		}
 806		sendIqPacket(account, iqPacket, null);
 807	}
 808
 809	private void mergePhoneContactsWithRoster() {
 810		PhoneHelper.loadPhoneContacts(getApplicationContext(),
 811				new OnPhoneContactsLoadedListener() {
 812					@Override
 813					public void onPhoneContactsLoaded(List<Bundle> phoneContacts) {
 814						for (Account account : accounts) {
 815							account.getRoster().clearSystemAccounts();
 816						}
 817						for (Bundle phoneContact : phoneContacts) {
 818							for (Account account : accounts) {
 819                                Jid jid;
 820                                try {
 821                                    jid = Jid.fromString(phoneContact.getString("jid"));
 822                                } catch (final InvalidJidException e) {
 823                                    // TODO: Warn if contact import fails here?
 824                                    break;
 825                                }
 826                                final Contact contact = account.getRoster()
 827										.getContact(jid);
 828								String systemAccount = phoneContact
 829										.getInt("phoneid")
 830										+ "#"
 831										+ phoneContact.getString("lookup");
 832								contact.setSystemAccount(systemAccount);
 833								contact.setPhotoUri(phoneContact
 834										.getString("photouri"));
 835								contact.setSystemName(phoneContact
 836										.getString("displayname"));
 837								getAvatarService().clear(contact);
 838							}
 839						}
 840					}
 841				});
 842	}
 843
 844	public List<Conversation> getConversations() {
 845		if (this.conversations == null) {
 846			Hashtable<String, Account> accountLookupTable = new Hashtable<>();
 847			for (Account account : this.accounts) {
 848				accountLookupTable.put(account.getUuid(), account);
 849			}
 850			this.conversations = databaseBackend
 851					.getConversations(Conversation.STATUS_AVAILABLE);
 852			for (Conversation conv : this.conversations) {
 853				Account account = accountLookupTable.get(conv.getAccountUuid());
 854				conv.setAccount(account);
 855				conv.setMessages(databaseBackend.getMessages(conv, 50));
 856				checkDeletedFiles(conv);
 857			}
 858		}
 859		return this.conversations;
 860	}
 861
 862	private void checkDeletedFiles(Conversation conversation) {
 863		for (Message message : conversation.getMessages()) {
 864			if (message.getType() == Message.TYPE_IMAGE
 865					&& message.getEncryption() != Message.ENCRYPTION_PGP) {
 866				if (!getFileBackend().isFileAvailable(message)) {
 867					message.setDownloadable(new DeletedDownloadable());
 868				}
 869			}
 870		}
 871	}
 872
 873	private void markFileDeleted(String uuid) {
 874		for (Conversation conversation : getConversations()) {
 875			for (Message message : conversation.getMessages()) {
 876				if (message.getType() == Message.TYPE_IMAGE
 877						&& message.getEncryption() != Message.ENCRYPTION_PGP
 878						&& message.getUuid().equals(uuid)) {
 879					if (!getFileBackend().isFileAvailable(message)) {
 880						message.setDownloadable(new DeletedDownloadable());
 881						updateConversationUi();
 882					}
 883					return;
 884				}
 885			}
 886		}
 887	}
 888
 889	public void populateWithOrderedConversations(List<Conversation> list) {
 890		populateWithOrderedConversations(list, true);
 891	}
 892
 893	public void populateWithOrderedConversations(List<Conversation> list,
 894			boolean includeConferences) {
 895		list.clear();
 896		if (includeConferences) {
 897			list.addAll(getConversations());
 898		} else {
 899			for (Conversation conversation : getConversations()) {
 900				if (conversation.getMode() == Conversation.MODE_SINGLE) {
 901					list.add(conversation);
 902				}
 903			}
 904		}
 905		Collections.sort(list, new Comparator<Conversation>() {
 906			@Override
 907			public int compare(Conversation lhs, Conversation rhs) {
 908				Message left = lhs.getLatestMessage();
 909				Message right = rhs.getLatestMessage();
 910				if (left.getTimeSent() > right.getTimeSent()) {
 911					return -1;
 912				} else if (left.getTimeSent() < right.getTimeSent()) {
 913					return 1;
 914				} else {
 915					return 0;
 916				}
 917			}
 918		});
 919	}
 920
 921	public int loadMoreMessages(Conversation conversation, long timestamp) {
 922		List<Message> messages = databaseBackend.getMessages(conversation, 50,
 923				timestamp);
 924		for (Message message : messages) {
 925			message.setConversation(conversation);
 926		}
 927		conversation.addAll(0, messages);
 928		return messages.size();
 929	}
 930
 931	public List<Account> getAccounts() {
 932		return this.accounts;
 933	}
 934
 935	public Conversation find(List<Conversation> haystack, Contact contact) {
 936		for (Conversation conversation : haystack) {
 937			if (conversation.getContact() == contact) {
 938				return conversation;
 939			}
 940		}
 941		return null;
 942	}
 943
 944	public Conversation find(final List<Conversation> haystack,
 945                             final Account account,
 946                             final Jid jid) {
 947		for (Conversation conversation : haystack) {
 948			if ((account == null || conversation.getAccount() == account)
 949					&& (conversation.getContactJid().toBareJid().equals(jid.toBareJid()))) {
 950				return conversation;
 951			}
 952		}
 953		return null;
 954	}
 955
 956	public Conversation findOrCreateConversation(final Account account, final Jid jid,
 957			final boolean muc) {
 958		Conversation conversation = find(account, jid);
 959		if (conversation != null) {
 960			return conversation;
 961		}
 962		conversation = databaseBackend.findConversation(account, jid);
 963		if (conversation != null) {
 964			conversation.setStatus(Conversation.STATUS_AVAILABLE);
 965			conversation.setAccount(account);
 966			if (muc) {
 967				conversation.setMode(Conversation.MODE_MULTI);
 968			} else {
 969				conversation.setMode(Conversation.MODE_SINGLE);
 970			}
 971			conversation.setMessages(databaseBackend.getMessages(conversation,
 972					50));
 973			this.databaseBackend.updateConversation(conversation);
 974		} else {
 975			String conversationName;
 976			Contact contact = account.getRoster().getContact(jid);
 977			if (contact != null) {
 978				conversationName = contact.getDisplayName();
 979			} else {
 980				conversationName = jid.getLocalpart();
 981			}
 982			if (muc) {
 983				conversation = new Conversation(conversationName, account, jid,
 984						Conversation.MODE_MULTI);
 985			} else {
 986				conversation = new Conversation(conversationName, account, jid,
 987						Conversation.MODE_SINGLE);
 988			}
 989			this.databaseBackend.createConversation(conversation);
 990		}
 991		this.conversations.add(conversation);
 992		updateConversationUi();
 993		return conversation;
 994	}
 995
 996	public void archiveConversation(Conversation conversation) {
 997		if (conversation.getMode() == Conversation.MODE_MULTI) {
 998			if (conversation.getAccount().getStatus() == Account.STATUS_ONLINE) {
 999				Bookmark bookmark = conversation.getBookmark();
1000				if (bookmark != null && bookmark.autojoin()) {
1001					bookmark.setAutojoin(false);
1002					pushBookmarks(bookmark.getAccount());
1003				}
1004			}
1005			leaveMuc(conversation);
1006		} else {
1007			conversation.endOtrIfNeeded();
1008		}
1009		this.databaseBackend.updateConversation(conversation);
1010		this.conversations.remove(conversation);
1011		updateConversationUi();
1012	}
1013
1014	public void clearConversationHistory(Conversation conversation) {
1015		this.databaseBackend.deleteMessagesInConversation(conversation);
1016		conversation.getMessages().clear();
1017		updateConversationUi();
1018	}
1019
1020	public int getConversationCount() {
1021		return this.databaseBackend.getConversationCount();
1022	}
1023
1024	public void createAccount(Account account) {
1025		databaseBackend.createAccount(account);
1026		this.accounts.add(account);
1027		this.reconnectAccount(account, false);
1028		updateAccountUi();
1029	}
1030
1031	public void updateAccount(Account account) {
1032		this.statusListener.onStatusChanged(account);
1033		databaseBackend.updateAccount(account);
1034		reconnectAccount(account, false);
1035		updateAccountUi();
1036		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
1037	}
1038
1039	public void deleteAccount(Account account) {
1040		for (Conversation conversation : conversations) {
1041			if (conversation.getAccount() == account) {
1042				if (conversation.getMode() == Conversation.MODE_MULTI) {
1043					leaveMuc(conversation);
1044				} else if (conversation.getMode() == Conversation.MODE_SINGLE) {
1045					conversation.endOtrIfNeeded();
1046				}
1047				conversations.remove(conversation);
1048			}
1049		}
1050		if (account.getXmppConnection() != null) {
1051			this.disconnect(account, true);
1052		}
1053		databaseBackend.deleteAccount(account);
1054		this.accounts.remove(account);
1055		updateAccountUi();
1056		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
1057	}
1058
1059	public void setOnConversationListChangedListener(
1060			OnConversationUpdate listener) {
1061		if (!isScreenOn()) {
1062			Log.d(Config.LOGTAG,
1063					"ignoring setOnConversationListChangedListener");
1064			return;
1065		}
1066		synchronized (this.convChangedListenerCount) {
1067			if (checkListeners()) {
1068				switchToForeground();
1069			}
1070			this.mOnConversationUpdate = listener;
1071			this.mNotificationService.setIsInForeground(true);
1072			this.convChangedListenerCount++;
1073		}
1074	}
1075
1076	public void removeOnConversationListChangedListener() {
1077		synchronized (this.convChangedListenerCount) {
1078			this.convChangedListenerCount--;
1079			if (this.convChangedListenerCount <= 0) {
1080				this.convChangedListenerCount = 0;
1081				this.mOnConversationUpdate = null;
1082				this.mNotificationService.setIsInForeground(false);
1083				if (checkListeners()) {
1084					switchToBackground();
1085				}
1086			}
1087		}
1088	}
1089
1090	public void setOnAccountListChangedListener(OnAccountUpdate listener) {
1091		if (!isScreenOn()) {
1092			Log.d(Config.LOGTAG, "ignoring setOnAccountListChangedListener");
1093			return;
1094		}
1095		synchronized (this.accountChangedListenerCount) {
1096			if (checkListeners()) {
1097				switchToForeground();
1098			}
1099			this.mOnAccountUpdate = listener;
1100			this.accountChangedListenerCount++;
1101		}
1102	}
1103
1104	public void removeOnAccountListChangedListener() {
1105		synchronized (this.accountChangedListenerCount) {
1106			this.accountChangedListenerCount--;
1107			if (this.accountChangedListenerCount <= 0) {
1108				this.mOnAccountUpdate = null;
1109				this.accountChangedListenerCount = 0;
1110				if (checkListeners()) {
1111					switchToBackground();
1112				}
1113			}
1114		}
1115	}
1116
1117	public void setOnRosterUpdateListener(OnRosterUpdate listener) {
1118		if (!isScreenOn()) {
1119			Log.d(Config.LOGTAG, "ignoring setOnRosterUpdateListener");
1120			return;
1121		}
1122		synchronized (this.rosterChangedListenerCount) {
1123			if (checkListeners()) {
1124				switchToForeground();
1125			}
1126			this.mOnRosterUpdate = listener;
1127			this.rosterChangedListenerCount++;
1128		}
1129	}
1130
1131	public void removeOnRosterUpdateListener() {
1132		synchronized (this.rosterChangedListenerCount) {
1133			this.rosterChangedListenerCount--;
1134			if (this.rosterChangedListenerCount <= 0) {
1135				this.rosterChangedListenerCount = 0;
1136				this.mOnRosterUpdate = null;
1137				if (checkListeners()) {
1138					switchToBackground();
1139				}
1140			}
1141		}
1142	}
1143
1144	private boolean checkListeners() {
1145		return (this.mOnAccountUpdate == null
1146				&& this.mOnConversationUpdate == null && this.mOnRosterUpdate == null);
1147	}
1148
1149	private void switchToForeground() {
1150		for (Account account : getAccounts()) {
1151			if (account.getStatus() == Account.STATUS_ONLINE) {
1152				XmppConnection connection = account.getXmppConnection();
1153				if (connection != null && connection.getFeatures().csi()) {
1154					connection.sendActive();
1155				}
1156			}
1157		}
1158		Log.d(Config.LOGTAG, "app switched into foreground");
1159	}
1160
1161	private void switchToBackground() {
1162		for (Account account : getAccounts()) {
1163			if (account.getStatus() == Account.STATUS_ONLINE) {
1164				XmppConnection connection = account.getXmppConnection();
1165				if (connection != null && connection.getFeatures().csi()) {
1166					connection.sendInactive();
1167				}
1168			}
1169		}
1170		this.mNotificationService.setIsInForeground(false);
1171		Log.d(Config.LOGTAG, "app switched into background");
1172	}
1173
1174	private boolean isScreenOn() {
1175		PowerManager pm = (PowerManager) this
1176				.getSystemService(Context.POWER_SERVICE);
1177		return pm.isScreenOn();
1178	}
1179
1180	public void connectMultiModeConversations(Account account) {
1181		List<Conversation> conversations = getConversations();
1182        for (Conversation conversation : conversations) {
1183            if ((conversation.getMode() == Conversation.MODE_MULTI)
1184                    && (conversation.getAccount() == account)) {
1185                joinMuc(conversation);
1186            }
1187        }
1188	}
1189
1190	public void joinMuc(Conversation conversation) {
1191		Account account = conversation.getAccount();
1192		account.pendingConferenceJoins.remove(conversation);
1193		account.pendingConferenceLeaves.remove(conversation);
1194		if (account.getStatus() == Account.STATUS_ONLINE) {
1195			Log.d(Config.LOGTAG,
1196					"joining conversation " + conversation.getContactJid());
1197			String nick = conversation.getMucOptions().getProposedNick();
1198			conversation.getMucOptions().setJoinNick(nick);
1199			PresencePacket packet = new PresencePacket();
1200			final Jid joinJid = conversation.getMucOptions().getJoinJid();
1201            packet.setTo(conversation.getMucOptions().getJoinJid());
1202			Element x = new Element("x");
1203			x.setAttribute("xmlns", "http://jabber.org/protocol/muc");
1204			if (conversation.getMucOptions().getPassword() != null) {
1205				Element password = x.addChild("password");
1206				password.setContent(conversation.getMucOptions().getPassword());
1207			}
1208			String sig = account.getPgpSignature();
1209			if (sig != null) {
1210				packet.addChild("status").setContent("online");
1211				packet.addChild("x", "jabber:x:signed").setContent(sig);
1212			}
1213			if (conversation.getMessages().size() != 0) {
1214				final SimpleDateFormat mDateFormat = new SimpleDateFormat(
1215						"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
1216				mDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
1217				Date date = new Date(conversation.getLatestMessage()
1218						.getTimeSent() + 1000);
1219				x.addChild("history").setAttribute("since",
1220						mDateFormat.format(date));
1221			}
1222			packet.addChild(x);
1223			sendPresencePacket(account, packet);
1224			if (!joinJid.equals(conversation.getContactJid())) {
1225				conversation.setContactJid(joinJid);
1226				databaseBackend.updateConversation(conversation);
1227			}
1228		} else {
1229			account.pendingConferenceJoins.add(conversation);
1230		}
1231	}
1232
1233	private OnRenameListener renameListener = null;
1234	private IqGenerator mIqGenerator = new IqGenerator(this);
1235
1236	public void setOnRenameListener(OnRenameListener listener) {
1237		this.renameListener = listener;
1238	}
1239
1240	public void providePasswordForMuc(Conversation conversation, String password) {
1241		if (conversation.getMode() == Conversation.MODE_MULTI) {
1242			conversation.getMucOptions().setPassword(password);
1243			if (conversation.getBookmark() != null) {
1244				conversation.getBookmark().setAutojoin(true);
1245				pushBookmarks(conversation.getAccount());
1246			}
1247			databaseBackend.updateConversation(conversation);
1248			joinMuc(conversation);
1249		}
1250	}
1251
1252	public void renameInMuc(final Conversation conversation, final String nick) {
1253		final MucOptions options = conversation.getMucOptions();
1254		options.setJoinNick(nick);
1255		if (options.online()) {
1256			Account account = conversation.getAccount();
1257			options.setOnRenameListener(new OnRenameListener() {
1258
1259				@Override
1260				public void onRename(boolean success) {
1261					if (renameListener != null) {
1262						renameListener.onRename(success);
1263					}
1264					if (success) {
1265						conversation.setContactJid(conversation.getMucOptions()
1266								.getJoinJid());
1267						databaseBackend.updateConversation(conversation);
1268						Bookmark bookmark = conversation.getBookmark();
1269						if (bookmark != null) {
1270							bookmark.setNick(nick);
1271							pushBookmarks(bookmark.getAccount());
1272						}
1273					}
1274				}
1275			});
1276			options.flagAboutToRename();
1277			PresencePacket packet = new PresencePacket();
1278			packet.setTo(options.getJoinJid());
1279			packet.setFrom(conversation.getAccount().getJid());
1280
1281			String sig = account.getPgpSignature();
1282			if (sig != null) {
1283				packet.addChild("status").setContent("online");
1284				packet.addChild("x", "jabber:x:signed").setContent(sig);
1285			}
1286			sendPresencePacket(account, packet);
1287		} else {
1288			conversation.setContactJid(options.getJoinJid());
1289			databaseBackend.updateConversation(conversation);
1290			if (conversation.getAccount().getStatus() == Account.STATUS_ONLINE) {
1291				Bookmark bookmark = conversation.getBookmark();
1292				if (bookmark != null) {
1293					bookmark.setNick(nick);
1294					pushBookmarks(bookmark.getAccount());
1295				}
1296				joinMuc(conversation);
1297			}
1298		}
1299	}
1300
1301	public void leaveMuc(Conversation conversation) {
1302		Account account = conversation.getAccount();
1303		account.pendingConferenceJoins.remove(conversation);
1304		account.pendingConferenceLeaves.remove(conversation);
1305		if (account.getStatus() == Account.STATUS_ONLINE) {
1306			PresencePacket packet = new PresencePacket();
1307			packet.setTo(conversation.getMucOptions().getJoinJid());
1308			packet.setFrom(conversation.getAccount().getJid());
1309			packet.setAttribute("type", "unavailable");
1310			sendPresencePacket(conversation.getAccount(), packet);
1311			conversation.getMucOptions().setOffline();
1312			conversation.deregisterWithBookmark();
1313			Log.d(Config.LOGTAG, conversation.getAccount().getJid().toBareJid()
1314					+ ": leaving muc " + conversation.getContactJid());
1315		} else {
1316			account.pendingConferenceLeaves.add(conversation);
1317		}
1318	}
1319
1320	public void disconnect(Account account, boolean force) {
1321		if ((account.getStatus() == Account.STATUS_ONLINE)
1322				|| (account.getStatus() == Account.STATUS_DISABLED)) {
1323			if (!force) {
1324				List<Conversation> conversations = getConversations();
1325                for (Conversation conversation : conversations) {
1326                    if (conversation.getAccount() == account) {
1327                        if (conversation.getMode() == Conversation.MODE_MULTI) {
1328                            leaveMuc(conversation);
1329                        } else {
1330                            if (conversation.endOtrIfNeeded()) {
1331                                Log.d(Config.LOGTAG, account.getJid().toBareJid()
1332                                        + ": ended otr session with "
1333                                        + conversation.getContactJid());
1334                            }
1335                        }
1336                    }
1337                }
1338			}
1339			account.getXmppConnection().disconnect(force);
1340		}
1341	}
1342
1343	@Override
1344	public IBinder onBind(Intent intent) {
1345		return mBinder;
1346	}
1347
1348	public void updateMessage(Message message) {
1349		databaseBackend.updateMessage(message);
1350		updateConversationUi();
1351	}
1352
1353	protected void syncDirtyContacts(Account account) {
1354		for (Contact contact : account.getRoster().getContacts()) {
1355			if (contact.getOption(Contact.Options.DIRTY_PUSH)) {
1356				pushContactToServer(contact);
1357			}
1358			if (contact.getOption(Contact.Options.DIRTY_DELETE)) {
1359				deleteContactOnServer(contact);
1360			}
1361		}
1362	}
1363
1364	public void createContact(Contact contact) {
1365		SharedPreferences sharedPref = getPreferences();
1366		boolean autoGrant = sharedPref.getBoolean("grant_new_contacts", true);
1367		if (autoGrant) {
1368			contact.setOption(Contact.Options.PREEMPTIVE_GRANT);
1369			contact.setOption(Contact.Options.ASKING);
1370		}
1371		pushContactToServer(contact);
1372	}
1373
1374	public void onOtrSessionEstablished(Conversation conversation) {
1375		Account account = conversation.getAccount();
1376		List<Message> messages = conversation.getMessages();
1377		Session otrSession = conversation.getOtrSession();
1378		Log.d(Config.LOGTAG,
1379				account.getJid().toBareJid() + " otr session established with "
1380						+ conversation.getContactJid() + "/"
1381						+ otrSession.getSessionID().getUserID());
1382        for (Message msg : messages) {
1383            if ((msg.getStatus() == Message.STATUS_UNSEND || msg.getStatus() == Message.STATUS_WAITING)
1384                    && (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
1385				SessionID id = otrSession.getSessionID();
1386				try {
1387					msg.setCounterpart(Jid.fromString(id.getAccountID()+"/"+id.getUserID()));
1388				} catch (InvalidJidException e) {
1389					break;
1390				}
1391                if (msg.getType() == Message.TYPE_TEXT) {
1392                    MessagePacket outPacket = mMessageGenerator
1393                            .generateOtrChat(msg, true);
1394                    if (outPacket != null) {
1395                        msg.setStatus(Message.STATUS_SEND);
1396                        databaseBackend.updateMessage(msg);
1397                        sendMessagePacket(account, outPacket);
1398                    }
1399                } else if (msg.getType() == Message.TYPE_IMAGE) {
1400                    mJingleConnectionManager.createNewConnection(msg);
1401                }
1402            }
1403        }
1404		updateConversationUi();
1405	}
1406
1407	public boolean renewSymmetricKey(Conversation conversation) {
1408		Account account = conversation.getAccount();
1409		byte[] symmetricKey = new byte[32];
1410		this.mRandom.nextBytes(symmetricKey);
1411		Session otrSession = conversation.getOtrSession();
1412		if (otrSession != null) {
1413			MessagePacket packet = new MessagePacket();
1414			packet.setType(MessagePacket.TYPE_CHAT);
1415			packet.setFrom(account.getJid());
1416			packet.addChild("private", "urn:xmpp:carbons:2");
1417			packet.addChild("no-copy", "urn:xmpp:hints");
1418			packet.setAttribute("to", otrSession.getSessionID().getAccountID() + "/"
1419					+ otrSession.getSessionID().getUserID());
1420			try {
1421				packet.setBody(otrSession
1422						.transformSending(CryptoHelper.FILETRANSFER
1423								+ CryptoHelper.bytesToHex(symmetricKey)));
1424				sendMessagePacket(account, packet);
1425				conversation.setSymmetricKey(symmetricKey);
1426				return true;
1427			} catch (OtrException e) {
1428				return false;
1429			}
1430		}
1431		return false;
1432	}
1433
1434	public void pushContactToServer(Contact contact) {
1435		contact.resetOption(Contact.Options.DIRTY_DELETE);
1436		contact.setOption(Contact.Options.DIRTY_PUSH);
1437		Account account = contact.getAccount();
1438		if (account.getStatus() == Account.STATUS_ONLINE) {
1439			boolean ask = contact.getOption(Contact.Options.ASKING);
1440			boolean sendUpdates = contact
1441					.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)
1442					&& contact.getOption(Contact.Options.PREEMPTIVE_GRANT);
1443			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
1444			iq.query("jabber:iq:roster").addChild(contact.asElement());
1445			account.getXmppConnection().sendIqPacket(iq, null);
1446			if (sendUpdates) {
1447				sendPresencePacket(account,
1448						mPresenceGenerator.sendPresenceUpdatesTo(contact));
1449			}
1450			if (ask) {
1451				sendPresencePacket(account,
1452						mPresenceGenerator.requestPresenceUpdatesFrom(contact));
1453			}
1454		}
1455	}
1456
1457	public void publishAvatar(Account account, Uri image,
1458			final UiCallback<Avatar> callback) {
1459		final Bitmap.CompressFormat format = Config.AVATAR_FORMAT;
1460		final int size = Config.AVATAR_SIZE;
1461		final Avatar avatar = getFileBackend()
1462				.getPepAvatar(image, size, format);
1463		if (avatar != null) {
1464			avatar.height = size;
1465			avatar.width = size;
1466			if (format.equals(Bitmap.CompressFormat.WEBP)) {
1467				avatar.type = "image/webp";
1468			} else if (format.equals(Bitmap.CompressFormat.JPEG)) {
1469				avatar.type = "image/jpeg";
1470			} else if (format.equals(Bitmap.CompressFormat.PNG)) {
1471				avatar.type = "image/png";
1472			}
1473			if (!getFileBackend().save(avatar)) {
1474				callback.error(R.string.error_saving_avatar, avatar);
1475				return;
1476			}
1477			IqPacket packet = this.mIqGenerator.publishAvatar(avatar);
1478			this.sendIqPacket(account, packet, new OnIqPacketReceived() {
1479
1480				@Override
1481				public void onIqPacketReceived(Account account, IqPacket result) {
1482					if (result.getType() == IqPacket.TYPE_RESULT) {
1483						IqPacket packet = XmppConnectionService.this.mIqGenerator
1484								.publishAvatarMetadata(avatar);
1485						sendIqPacket(account, packet, new OnIqPacketReceived() {
1486
1487							@Override
1488							public void onIqPacketReceived(Account account,
1489									IqPacket result) {
1490								if (result.getType() == IqPacket.TYPE_RESULT) {
1491									if (account.setAvatar(avatar.getFilename())) {
1492										databaseBackend.updateAccount(account);
1493									}
1494									callback.success(avatar);
1495								} else {
1496									callback.error(
1497											R.string.error_publish_avatar_server_reject,
1498											avatar);
1499								}
1500							}
1501						});
1502					} else {
1503						callback.error(
1504								R.string.error_publish_avatar_server_reject,
1505								avatar);
1506					}
1507				}
1508			});
1509		} else {
1510			callback.error(R.string.error_publish_avatar_converting, null);
1511		}
1512	}
1513
1514	public void fetchAvatar(Account account, Avatar avatar) {
1515		fetchAvatar(account, avatar, null);
1516	}
1517
1518	public void fetchAvatar(Account account, final Avatar avatar,
1519			final UiCallback<Avatar> callback) {
1520		IqPacket packet = this.mIqGenerator.retrieveAvatar(avatar);
1521		sendIqPacket(account, packet, new OnIqPacketReceived() {
1522
1523			@Override
1524			public void onIqPacketReceived(Account account, IqPacket result) {
1525				final String ERROR = account.getJid().toBareJid()
1526						+ ": fetching avatar for " + avatar.owner + " failed ";
1527				if (result.getType() == IqPacket.TYPE_RESULT) {
1528					avatar.image = mIqParser.avatarData(result);
1529					if (avatar.image != null) {
1530						if (getFileBackend().save(avatar)) {
1531							if (account.getJid().toBareJid().equals(avatar.owner)) {
1532								if (account.setAvatar(avatar.getFilename())) {
1533									databaseBackend.updateAccount(account);
1534								}
1535								getAvatarService().clear(account);
1536								updateConversationUi();
1537								updateAccountUi();
1538							} else {
1539								Contact contact = account.getRoster()
1540										.getContact(avatar.owner);
1541								contact.setAvatar(avatar.getFilename());
1542								getAvatarService().clear(contact);
1543								updateConversationUi();
1544								updateRosterUi();
1545							}
1546							if (callback != null) {
1547								callback.success(avatar);
1548							}
1549							Log.d(Config.LOGTAG, account.getJid().toBareJid()
1550									+ ": succesfully fetched avatar for "
1551									+ avatar.owner);
1552							return;
1553						}
1554					} else {
1555
1556						Log.d(Config.LOGTAG, ERROR + "(parsing error)");
1557					}
1558				} else {
1559					Element error = result.findChild("error");
1560					if (error == null) {
1561						Log.d(Config.LOGTAG, ERROR + "(server error)");
1562					} else {
1563						Log.d(Config.LOGTAG, ERROR + error.toString());
1564					}
1565				}
1566				if (callback != null) {
1567					callback.error(0, null);
1568				}
1569
1570			}
1571		});
1572	}
1573
1574	public void checkForAvatar(Account account,
1575			final UiCallback<Avatar> callback) {
1576		IqPacket packet = this.mIqGenerator.retrieveAvatarMetaData(null);
1577		this.sendIqPacket(account, packet, new OnIqPacketReceived() {
1578
1579			@Override
1580			public void onIqPacketReceived(Account account, IqPacket packet) {
1581				if (packet.getType() == IqPacket.TYPE_RESULT) {
1582					Element pubsub = packet.findChild("pubsub",
1583							"http://jabber.org/protocol/pubsub");
1584					if (pubsub != null) {
1585						Element items = pubsub.findChild("items");
1586						if (items != null) {
1587							Avatar avatar = Avatar.parseMetadata(items);
1588							if (avatar != null) {
1589								avatar.owner = account.getJid().toBareJid();
1590								if (fileBackend.isAvatarCached(avatar)) {
1591									if (account.setAvatar(avatar.getFilename())) {
1592										databaseBackend.updateAccount(account);
1593									}
1594									getAvatarService().clear(account);
1595									callback.success(avatar);
1596								} else {
1597									fetchAvatar(account, avatar, callback);
1598								}
1599								return;
1600							}
1601						}
1602					}
1603				}
1604				callback.error(0, null);
1605			}
1606		});
1607	}
1608
1609	public void deleteContactOnServer(Contact contact) {
1610		contact.resetOption(Contact.Options.PREEMPTIVE_GRANT);
1611		contact.resetOption(Contact.Options.DIRTY_PUSH);
1612		contact.setOption(Contact.Options.DIRTY_DELETE);
1613		Account account = contact.getAccount();
1614		if (account.getStatus() == Account.STATUS_ONLINE) {
1615			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
1616			Element item = iq.query("jabber:iq:roster").addChild("item");
1617			item.setAttribute("jid", contact.getJid().toString());
1618			item.setAttribute("subscription", "remove");
1619			account.getXmppConnection().sendIqPacket(iq, null);
1620		}
1621	}
1622
1623	public void updateConversation(Conversation conversation) {
1624		this.databaseBackend.updateConversation(conversation);
1625	}
1626
1627	public void reconnectAccount(final Account account, final boolean force) {
1628		new Thread(new Runnable() {
1629
1630			@Override
1631			public void run() {
1632				if (account.getXmppConnection() != null) {
1633					disconnect(account, force);
1634				}
1635				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
1636					if (account.getXmppConnection() == null) {
1637						account.setXmppConnection(createConnection(account));
1638					}
1639					Thread thread = new Thread(account.getXmppConnection());
1640					thread.start();
1641					scheduleWakeupCall((int) (Config.CONNECT_TIMEOUT * 1.2),
1642							false);
1643				} else {
1644					account.getRoster().clearPresences();
1645					account.setXmppConnection(null);
1646				}
1647			}
1648		}).start();
1649	}
1650
1651	public void invite(Conversation conversation, String contact) {
1652		MessagePacket packet = mMessageGenerator.invite(conversation, contact);
1653		sendMessagePacket(conversation.getAccount(), packet);
1654	}
1655
1656	public void resetSendingToWaiting(Account account) {
1657		for (Conversation conversation : getConversations()) {
1658			if (conversation.getAccount() == account) {
1659				for (Message message : conversation.getMessages()) {
1660					if (message.getType() != Message.TYPE_IMAGE
1661							&& message.getStatus() == Message.STATUS_UNSEND) {
1662						markMessage(message, Message.STATUS_WAITING);
1663					}
1664				}
1665			}
1666		}
1667	}
1668
1669	public boolean markMessage(final Account account, final Jid recipient, final String uuid,
1670			final int status) {
1671		if (uuid == null) {
1672			return false;
1673		} else {
1674			for (Conversation conversation : getConversations()) {
1675				if (conversation.getContactJid().equals(recipient)
1676						&& conversation.getAccount().equals(account)) {
1677					return markMessage(conversation, uuid, status);
1678				}
1679			}
1680			return false;
1681		}
1682	}
1683
1684	public boolean markMessage(Conversation conversation, String uuid,
1685			int status) {
1686		if (uuid == null) {
1687			return false;
1688		} else {
1689			for (Message message : conversation.getMessages()) {
1690				if (uuid.equals(message.getUuid())
1691						|| (message.getStatus() >= Message.STATUS_SEND && uuid
1692								.equals(message.getRemoteMsgId()))) {
1693					markMessage(message, status);
1694					return true;
1695				}
1696			}
1697			return false;
1698		}
1699	}
1700
1701	public void markMessage(Message message, int status) {
1702		if (status == Message.STATUS_SEND_FAILED
1703				&& (message.getStatus() == Message.STATUS_SEND_RECEIVED || message
1704						.getStatus() == Message.STATUS_SEND_DISPLAYED)) {
1705			return;
1706		}
1707		message.setStatus(status);
1708		databaseBackend.updateMessage(message);
1709		updateConversationUi();
1710	}
1711
1712	public SharedPreferences getPreferences() {
1713		return PreferenceManager
1714				.getDefaultSharedPreferences(getApplicationContext());
1715	}
1716
1717	public boolean forceEncryption() {
1718		return getPreferences().getBoolean("force_encryption", false);
1719	}
1720
1721	public boolean confirmMessages() {
1722		return getPreferences().getBoolean("confirm_messages", true);
1723	}
1724
1725	public boolean saveEncryptedMessages() {
1726		return !getPreferences().getBoolean("dont_save_encrypted", false);
1727	}
1728
1729	public boolean indicateReceived() {
1730		return getPreferences().getBoolean("indicate_received", false);
1731	}
1732
1733	public void updateConversationUi() {
1734		if (mOnConversationUpdate != null) {
1735			mOnConversationUpdate.onConversationUpdate();
1736		}
1737	}
1738
1739	public void updateAccountUi() {
1740		if (mOnAccountUpdate != null) {
1741			mOnAccountUpdate.onAccountUpdate();
1742		}
1743	}
1744
1745	public void updateRosterUi() {
1746		if (mOnRosterUpdate != null) {
1747			mOnRosterUpdate.onRosterUpdate();
1748		}
1749	}
1750
1751	public Account findAccountByJid(final Jid accountJid) {
1752		for (Account account : this.accounts) {
1753			if (account.getJid().toBareJid().equals(accountJid)) {
1754				return account;
1755			}
1756		}
1757		return null;
1758	}
1759
1760	public Conversation findConversationByUuid(String uuid) {
1761		for (Conversation conversation : getConversations()) {
1762			if (conversation.getUuid().equals(uuid)) {
1763				return conversation;
1764			}
1765		}
1766		return null;
1767	}
1768
1769	public void markRead(Conversation conversation, boolean calledByUi) {
1770		mNotificationService.clear(conversation);
1771		String id = conversation.getLatestMarkableMessageId();
1772		conversation.markRead();
1773		if (confirmMessages() && id != null && calledByUi) {
1774			Log.d(Config.LOGTAG, conversation.getAccount().getJid().toBareJid()
1775					+ ": sending read marker for " + conversation.getName());
1776			Account account = conversation.getAccount();
1777			final Jid to = conversation.getContactJid();
1778			this.sendMessagePacket(conversation.getAccount(),
1779					mMessageGenerator.confirm(account, to, id));
1780		}
1781		if (!calledByUi) {
1782			updateConversationUi();
1783		}
1784	}
1785
1786	public void failWaitingOtrMessages(Conversation conversation) {
1787		for (Message message : conversation.getMessages()) {
1788			if (message.getEncryption() == Message.ENCRYPTION_OTR
1789					&& message.getStatus() == Message.STATUS_WAITING) {
1790				markMessage(message, Message.STATUS_SEND_FAILED);
1791			}
1792		}
1793	}
1794
1795	public SecureRandom getRNG() {
1796		return this.mRandom;
1797	}
1798
1799	public MemorizingTrustManager getMemorizingTrustManager() {
1800		return this.mMemorizingTrustManager;
1801	}
1802
1803	public PowerManager getPowerManager() {
1804		return this.pm;
1805	}
1806
1807	public LruCache<String, Bitmap> getBitmapCache() {
1808		return this.mBitmapCache;
1809	}
1810
1811	public void replyWithNotAcceptable(Account account, MessagePacket packet) {
1812		if (account.getStatus() == Account.STATUS_ONLINE) {
1813			MessagePacket error = this.mMessageGenerator
1814					.generateNotAcceptable(packet);
1815			sendMessagePacket(account, error);
1816		}
1817	}
1818
1819	public void syncRosterToDisk(final Account account) {
1820		new Thread(new Runnable() {
1821
1822			@Override
1823			public void run() {
1824				databaseBackend.writeRoster(account.getRoster());
1825			}
1826		}).start();
1827
1828	}
1829
1830	public List<String> getKnownHosts() {
1831		List<String> hosts = new ArrayList<>();
1832		for (Account account : getAccounts()) {
1833			if (!hosts.contains(account.getServer().toString())) {
1834				hosts.add(account.getServer().toString());
1835			}
1836			for (Contact contact : account.getRoster().getContacts()) {
1837				if (contact.showInRoster()) {
1838					final String server = contact.getServer().toString();
1839					if (server != null && !hosts.contains(server)) {
1840						hosts.add(server);
1841					}
1842				}
1843			}
1844		}
1845		return hosts;
1846	}
1847
1848	public List<String> getKnownConferenceHosts() {
1849		ArrayList<String> mucServers = new ArrayList<>();
1850		for (Account account : accounts) {
1851			if (account.getXmppConnection() != null) {
1852				String server = account.getXmppConnection().getMucServer();
1853				if (server != null && !mucServers.contains(server)) {
1854					mucServers.add(server);
1855				}
1856			}
1857		}
1858		return mucServers;
1859	}
1860
1861	public void sendMessagePacket(Account account, MessagePacket packet) {
1862		XmppConnection connection = account.getXmppConnection();
1863		if (connection != null) {
1864			connection.sendMessagePacket(packet);
1865		}
1866	}
1867
1868	public void sendPresencePacket(Account account, PresencePacket packet) {
1869		XmppConnection connection = account.getXmppConnection();
1870		if (connection != null) {
1871			connection.sendPresencePacket(packet);
1872		}
1873	}
1874
1875	public void sendIqPacket(Account account, IqPacket packet,
1876			OnIqPacketReceived callback) {
1877		XmppConnection connection = account.getXmppConnection();
1878		if (connection != null) {
1879			connection.sendIqPacket(packet, callback);
1880		}
1881	}
1882
1883	public MessageGenerator getMessageGenerator() {
1884		return this.mMessageGenerator;
1885	}
1886
1887	public PresenceGenerator getPresenceGenerator() {
1888		return this.mPresenceGenerator;
1889	}
1890
1891	public IqGenerator getIqGenerator() {
1892		return this.mIqGenerator;
1893	}
1894
1895	public JingleConnectionManager getJingleConnectionManager() {
1896		return this.mJingleConnectionManager;
1897	}
1898
1899	public interface OnConversationUpdate {
1900		public void onConversationUpdate();
1901	}
1902
1903	public interface OnAccountUpdate {
1904		public void onAccountUpdate();
1905	}
1906
1907	public interface OnRosterUpdate {
1908		public void onRosterUpdate();
1909	}
1910
1911	public List<Contact> findContacts(String jid) {
1912		ArrayList<Contact> contacts = new ArrayList<>();
1913		for (Account account : getAccounts()) {
1914			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
1915				Contact contact = account.getRoster().getContactFromRoster(jid);
1916				if (contact != null) {
1917					contacts.add(contact);
1918				}
1919			}
1920		}
1921		return contacts;
1922	}
1923
1924	public NotificationService getNotificationService() {
1925		return this.mNotificationService;
1926	}
1927
1928	public HttpConnectionManager getHttpConnectionManager() {
1929		return this.mHttpConnectionManager;
1930	}
1931
1932	private class DeletedDownloadable implements Downloadable {
1933
1934		@Override
1935		public boolean start() {
1936			return false;
1937		}
1938
1939		@Override
1940		public int getStatus() {
1941			return Downloadable.STATUS_DELETED;
1942		}
1943
1944		@Override
1945		public long getFileSize() {
1946			return 0;
1947		}
1948
1949	}
1950
1951	public void resendFailedMessages(Message message) {
1952		List<Message> messages = new ArrayList<>();
1953		Message current = message;
1954		while(current.getStatus() == Message.STATUS_SEND_FAILED) {
1955			messages.add(current);
1956			if (current.mergeable(current.next())) {
1957				current = current.next();
1958			} else {
1959				break;
1960			}
1961		}
1962		for(Message msg: messages) {
1963			markMessage(msg, Message.STATUS_WAITING);
1964			this.resendMessage(msg);
1965		}
1966	}
1967}