1package eu.siacs.conversations.parser;
   2
   3import android.util.Log;
   4import android.util.Pair;
   5
   6import com.cheogram.android.BobTransfer;
   7import com.cheogram.android.WebxdcUpdate;
   8
   9import java.io.File;
  10import java.net.URISyntaxException;
  11import java.text.SimpleDateFormat;
  12import java.util.ArrayList;
  13import java.util.Arrays;
  14import java.util.Collections;
  15import java.util.Date;
  16import java.util.LinkedHashSet;
  17import java.util.List;
  18import java.util.Locale;
  19import java.util.Map;
  20import java.util.Set;
  21import java.util.UUID;
  22
  23import io.ipfs.cid.Cid;
  24
  25import eu.siacs.conversations.Config;
  26import eu.siacs.conversations.R;
  27import eu.siacs.conversations.crypto.axolotl.AxolotlService;
  28import eu.siacs.conversations.crypto.axolotl.BrokenSessionException;
  29import eu.siacs.conversations.crypto.axolotl.NotEncryptedForThisDeviceException;
  30import eu.siacs.conversations.crypto.axolotl.OutdatedSenderException;
  31import eu.siacs.conversations.crypto.axolotl.XmppAxolotlMessage;
  32import eu.siacs.conversations.entities.Account;
  33import eu.siacs.conversations.entities.Bookmark;
  34import eu.siacs.conversations.entities.Contact;
  35import eu.siacs.conversations.entities.Conversation;
  36import eu.siacs.conversations.entities.Conversational;
  37import eu.siacs.conversations.entities.Message;
  38import eu.siacs.conversations.entities.MucOptions;
  39import eu.siacs.conversations.entities.ReadByMarker;
  40import eu.siacs.conversations.entities.ReceiptRequest;
  41import eu.siacs.conversations.entities.RtpSessionStatus;
  42import eu.siacs.conversations.http.HttpConnectionManager;
  43import eu.siacs.conversations.services.MessageArchiveService;
  44import eu.siacs.conversations.services.QuickConversationsService;
  45import eu.siacs.conversations.services.XmppConnectionService;
  46import eu.siacs.conversations.utils.CryptoHelper;
  47import eu.siacs.conversations.xml.Element;
  48import eu.siacs.conversations.xml.LocalizedContent;
  49import eu.siacs.conversations.xml.Namespace;
  50import eu.siacs.conversations.xmpp.InvalidJid;
  51import eu.siacs.conversations.xmpp.Jid;
  52import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
  53import eu.siacs.conversations.xmpp.chatstate.ChatState;
  54import eu.siacs.conversations.xmpp.jingle.JingleConnectionManager;
  55import eu.siacs.conversations.xmpp.jingle.JingleRtpConnection;
  56import eu.siacs.conversations.xmpp.pep.Avatar;
  57import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
  58
  59public class MessageParser extends AbstractParser implements OnMessagePacketReceived {
  60
  61    private static final SimpleDateFormat TIME_FORMAT = new SimpleDateFormat("HH:mm:ss", Locale.ENGLISH);
  62
  63    private static final List<String> JINGLE_MESSAGE_ELEMENT_NAMES = Arrays.asList("accept", "propose", "proceed", "reject", "retract");
  64
  65    public MessageParser(XmppConnectionService service) {
  66        super(service);
  67    }
  68
  69    private static String extractStanzaId(Element packet, boolean isTypeGroupChat, Conversation conversation) {
  70        final Jid by;
  71        final boolean safeToExtract;
  72        if (isTypeGroupChat) {
  73            by = conversation.getJid().asBareJid();
  74            safeToExtract = conversation.getMucOptions().hasFeature(Namespace.STANZA_IDS);
  75        } else {
  76            Account account = conversation.getAccount();
  77            by = account.getJid().asBareJid();
  78            safeToExtract = account.getXmppConnection().getFeatures().stanzaIds();
  79        }
  80        return safeToExtract ? extractStanzaId(packet, by) : null;
  81    }
  82
  83    private static String extractStanzaId(Account account, Element packet) {
  84        final boolean safeToExtract = account.getXmppConnection().getFeatures().stanzaIds();
  85        return safeToExtract ? extractStanzaId(packet, account.getJid().asBareJid()) : null;
  86    }
  87
  88    private static String extractStanzaId(Element packet, Jid by) {
  89        for (Element child : packet.getChildren()) {
  90            if (child.getName().equals("stanza-id")
  91                    && Namespace.STANZA_IDS.equals(child.getNamespace())
  92                    && by.equals(InvalidJid.getNullForInvalid(child.getAttributeAsJid("by")))) {
  93                return child.getAttribute("id");
  94            }
  95        }
  96        return null;
  97    }
  98
  99    private static Jid getTrueCounterpart(Element mucUserElement, Jid fallback) {
 100        final Element item = mucUserElement == null ? null : mucUserElement.findChild("item");
 101        Jid result = item == null ? null : InvalidJid.getNullForInvalid(item.getAttributeAsJid("jid"));
 102        return result != null ? result : fallback;
 103    }
 104
 105    private boolean extractChatState(Conversation c, final boolean isTypeGroupChat, final MessagePacket packet) {
 106        ChatState state = ChatState.parse(packet);
 107        if (state != null && c != null) {
 108            final Account account = c.getAccount();
 109            final Jid from = packet.getFrom();
 110            if (from.asBareJid().equals(account.getJid().asBareJid())) {
 111                c.setOutgoingChatState(state);
 112                if (state == ChatState.ACTIVE || state == ChatState.COMPOSING) {
 113                    if (c.getContact().isSelf()) {
 114                        return false;
 115                    }
 116                    mXmppConnectionService.markRead(c);
 117                    activateGracePeriod(account);
 118                }
 119                return false;
 120            } else {
 121                if (isTypeGroupChat) {
 122                    MucOptions.User user = c.getMucOptions().findUserByFullJid(from);
 123                    if (user != null) {
 124                        return user.setChatState(state);
 125                    } else {
 126                        return false;
 127                    }
 128                } else {
 129                    return c.setIncomingChatState(state);
 130                }
 131            }
 132        }
 133        return false;
 134    }
 135
 136    private Message parseAxolotlChat(Element axolotlMessage, Jid from, Conversation conversation, int status, final boolean checkedForDuplicates, boolean postpone) {
 137        final AxolotlService service = conversation.getAccount().getAxolotlService();
 138        final XmppAxolotlMessage xmppAxolotlMessage;
 139        try {
 140            xmppAxolotlMessage = XmppAxolotlMessage.fromElement(axolotlMessage, from.asBareJid());
 141        } catch (Exception e) {
 142            Log.d(Config.LOGTAG, conversation.getAccount().getJid().asBareJid() + ": invalid omemo message received " + e.getMessage());
 143            return null;
 144        }
 145        if (xmppAxolotlMessage.hasPayload()) {
 146            final XmppAxolotlMessage.XmppAxolotlPlaintextMessage plaintextMessage;
 147            try {
 148                plaintextMessage = service.processReceivingPayloadMessage(xmppAxolotlMessage, postpone);
 149            } catch (BrokenSessionException e) {
 150                if (checkedForDuplicates) {
 151                    if (service.trustedOrPreviouslyResponded(from.asBareJid())) {
 152                        service.reportBrokenSessionException(e, postpone);
 153                        return new Message(conversation, "", Message.ENCRYPTION_AXOLOTL_FAILED, status);
 154                    } else {
 155                        Log.d(Config.LOGTAG, "ignoring broken session exception because contact was not trusted");
 156                        return new Message(conversation, "", Message.ENCRYPTION_AXOLOTL_FAILED, status);
 157                    }
 158                } else {
 159                    Log.d(Config.LOGTAG, "ignoring broken session exception because checkForDuplicates failed");
 160                    return null;
 161                }
 162            } catch (NotEncryptedForThisDeviceException e) {
 163                return new Message(conversation, "", Message.ENCRYPTION_AXOLOTL_NOT_FOR_THIS_DEVICE, status);
 164            } catch (OutdatedSenderException e) {
 165                return new Message(conversation, "", Message.ENCRYPTION_AXOLOTL_FAILED, status);
 166            }
 167            if (plaintextMessage != null) {
 168                Message finishedMessage = new Message(conversation, plaintextMessage.getPlaintext(), Message.ENCRYPTION_AXOLOTL, status);
 169                finishedMessage.setFingerprint(plaintextMessage.getFingerprint());
 170                Log.d(Config.LOGTAG, AxolotlService.getLogprefix(finishedMessage.getConversation().getAccount()) + " Received Message with session fingerprint: " + plaintextMessage.getFingerprint());
 171                return finishedMessage;
 172            }
 173        } else {
 174            Log.d(Config.LOGTAG, conversation.getAccount().getJid().asBareJid() + ": received OMEMO key transport message");
 175            service.processReceivingKeyTransportMessage(xmppAxolotlMessage, postpone);
 176        }
 177        return null;
 178    }
 179
 180    private Invite extractInvite(Element message) {
 181        final Element mucUser = message.findChild("x", Namespace.MUC_USER);
 182        if (mucUser != null) {
 183            Element invite = mucUser.findChild("invite");
 184            if (invite != null) {
 185                String password = mucUser.findChildContent("password");
 186                Jid from = InvalidJid.getNullForInvalid(invite.getAttributeAsJid("from"));
 187                Jid room = InvalidJid.getNullForInvalid(message.getAttributeAsJid("from"));
 188                if (room == null) {
 189                    return null;
 190                }
 191                return new Invite(room, password, false, from);
 192            }
 193        }
 194        final Element conference = message.findChild("x", "jabber:x:conference");
 195        if (conference != null) {
 196            Jid from = InvalidJid.getNullForInvalid(message.getAttributeAsJid("from"));
 197            Jid room = InvalidJid.getNullForInvalid(conference.getAttributeAsJid("jid"));
 198            if (room == null) {
 199                return null;
 200            }
 201            return new Invite(room, conference.getAttribute("password"), true, from);
 202        }
 203        return null;
 204    }
 205
 206    private void parseEvent(final Element event, final Jid from, final Account account) {
 207        final Element items = event.findChild("items");
 208        final String node = items == null ? null : items.getAttribute("node");
 209        if ("urn:xmpp:avatar:metadata".equals(node)) {
 210            Avatar avatar = Avatar.parseMetadata(items);
 211            if (avatar != null) {
 212                avatar.owner = from.asBareJid();
 213                if (mXmppConnectionService.getFileBackend().isAvatarCached(avatar)) {
 214                    if (account.getJid().asBareJid().equals(from)) {
 215                        if (account.setAvatar(avatar.getFilename())) {
 216                            mXmppConnectionService.databaseBackend.updateAccount(account);
 217                            mXmppConnectionService.notifyAccountAvatarHasChanged(account);
 218                        }
 219                        mXmppConnectionService.getAvatarService().clear(account);
 220                        mXmppConnectionService.updateConversationUi();
 221                        mXmppConnectionService.updateAccountUi();
 222                    } else {
 223                        final Contact contact = account.getRoster().getContact(from);
 224                        contact.setAvatar(avatar);
 225                        mXmppConnectionService.syncRoster(account);
 226                        mXmppConnectionService.getAvatarService().clear(contact);
 227                        mXmppConnectionService.updateConversationUi();
 228                        mXmppConnectionService.updateRosterUi();
 229                    }
 230                } else if (mXmppConnectionService.isDataSaverDisabled()) {
 231                    mXmppConnectionService.fetchAvatar(account, avatar);
 232                }
 233            }
 234        } else if (Namespace.NICK.equals(node)) {
 235            final Element i = items.findChild("item");
 236            final String nick = i == null ? null : i.findChildContent("nick", Namespace.NICK);
 237            if (nick != null) {
 238                setNick(account, from, nick);
 239            }
 240        } else if (AxolotlService.PEP_DEVICE_LIST.equals(node)) {
 241            Element item = items.findChild("item");
 242            Set<Integer> deviceIds = mXmppConnectionService.getIqParser().deviceIds(item);
 243            Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Received PEP device list " + deviceIds + " update from " + from + ", processing... ");
 244            final AxolotlService axolotlService = account.getAxolotlService();
 245            axolotlService.registerDevices(from, deviceIds);
 246        } else if (Namespace.BOOKMARKS.equals(node) && account.getJid().asBareJid().equals(from)) {
 247            if (account.getXmppConnection().getFeatures().bookmarksConversion()) {
 248                final Element i = items.findChild("item");
 249                final Element storage = i == null ? null : i.findChild("storage", Namespace.BOOKMARKS);
 250                Map<Jid, Bookmark> bookmarks = Bookmark.parseFromStorage(storage, account);
 251                mXmppConnectionService.processBookmarksInitial(account, bookmarks, true);
 252                Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": processing bookmark PEP event");
 253            } else {
 254                Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": ignoring bookmark PEP event because bookmark conversion was not detected");
 255            }
 256        } else if (Namespace.BOOKMARKS2.equals(node) && account.getJid().asBareJid().equals(from)) {
 257            final Element item = items.findChild("item");
 258            final Element retract = items.findChild("retract");
 259            if (item != null) {
 260                final Bookmark bookmark = Bookmark.parseFromItem(item, account);
 261                if (bookmark != null) {
 262                    account.putBookmark(bookmark);
 263                    mXmppConnectionService.processModifiedBookmark(bookmark);
 264                    mXmppConnectionService.updateConversationUi();
 265                }
 266            }
 267            if (retract != null) {
 268                final Jid id = InvalidJid.getNullForInvalid(retract.getAttributeAsJid("id"));
 269                if (id != null) {
 270                    account.removeBookmark(id);
 271                    Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": deleted bookmark for " + id);
 272                    mXmppConnectionService.processDeletedBookmark(account, id);
 273                    mXmppConnectionService.updateConversationUi();
 274                }
 275            }
 276        } else {
 277            Log.d(Config.LOGTAG, account.getJid().asBareJid() + " received pubsub notification for node=" + node);
 278        }
 279    }
 280
 281    private void parseDeleteEvent(final Element event, final Jid from, final Account account) {
 282        final Element delete = event.findChild("delete");
 283        final String node = delete == null ? null : delete.getAttribute("node");
 284        if (Namespace.NICK.equals(node)) {
 285            Log.d(Config.LOGTAG, "parsing nick delete event from " + from);
 286            setNick(account, from, null);
 287        } else if (Namespace.BOOKMARKS2.equals(node) && account.getJid().asBareJid().equals(from)) {
 288            account.setBookmarks(Collections.emptyMap());
 289            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": deleted bookmarks node");
 290        } else if (Namespace.AVATAR_METADATA.equals(node) && account.getJid().asBareJid().equals(from)) {
 291            Log.d(Config.LOGTAG,account.getJid().asBareJid()+": deleted avatar metadata node");
 292        }
 293    }
 294
 295    private void parsePurgeEvent(final Element event, final Jid from, final Account account) {
 296        final Element purge = event.findChild("purge");
 297        final String node = purge == null ? null : purge.getAttribute("node");
 298        if (Namespace.BOOKMARKS2.equals(node) && account.getJid().asBareJid().equals(from)) {
 299            account.setBookmarks(Collections.emptyMap());
 300            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": purged bookmarks");
 301        }
 302    }
 303
 304    private void setNick(Account account, Jid user, String nick) {
 305        if (user.asBareJid().equals(account.getJid().asBareJid())) {
 306            account.setDisplayName(nick);
 307            if (QuickConversationsService.isQuicksy()) {
 308                mXmppConnectionService.getAvatarService().clear(account);
 309            }
 310        } else {
 311            Contact contact = account.getRoster().getContact(user);
 312            if (contact.setPresenceName(nick)) {
 313                mXmppConnectionService.syncRoster(account);
 314                mXmppConnectionService.getAvatarService().clear(contact);
 315            }
 316        }
 317        mXmppConnectionService.updateConversationUi();
 318        mXmppConnectionService.updateAccountUi();
 319    }
 320
 321    private boolean handleErrorMessage(final Account account, final MessagePacket packet) {
 322        if (packet.getType() == MessagePacket.TYPE_ERROR) {
 323            if (packet.fromServer(account)) {
 324                final Pair<MessagePacket, Long> forwarded = packet.getForwardedMessagePacket("received", Namespace.CARBONS);
 325                if (forwarded != null) {
 326                    return handleErrorMessage(account, forwarded.first);
 327                }
 328            }
 329            final Jid from = packet.getFrom();
 330            final String id = packet.getId();
 331            if (from != null && id != null) {
 332                if (id.startsWith(JingleRtpConnection.JINGLE_MESSAGE_PROPOSE_ID_PREFIX)) {
 333                    final String sessionId = id.substring(JingleRtpConnection.JINGLE_MESSAGE_PROPOSE_ID_PREFIX.length());
 334                    mXmppConnectionService.getJingleConnectionManager()
 335                            .updateProposedSessionDiscovered(account, from, sessionId, JingleConnectionManager.DeviceDiscoveryState.FAILED);
 336                    return true;
 337                }
 338                if (id.startsWith(JingleRtpConnection.JINGLE_MESSAGE_PROCEED_ID_PREFIX)) {
 339                    final String sessionId = id.substring(JingleRtpConnection.JINGLE_MESSAGE_PROCEED_ID_PREFIX.length());
 340                    final String message = extractErrorMessage(packet);
 341                    mXmppConnectionService.getJingleConnectionManager().failProceed(account, from, sessionId, message);
 342                    return true;
 343                }
 344                mXmppConnectionService.markMessage(account,
 345                        from.asBareJid(),
 346                        id,
 347                        Message.STATUS_SEND_FAILED,
 348                        extractErrorMessage(packet));
 349                final Element error = packet.findChild("error");
 350                final boolean pingWorthyError = error != null && (error.hasChild("not-acceptable") || error.hasChild("remote-server-timeout") || error.hasChild("remote-server-not-found"));
 351                if (pingWorthyError) {
 352                    Conversation conversation = mXmppConnectionService.find(account, from);
 353                    if (conversation != null && conversation.getMode() == Conversational.MODE_MULTI) {
 354                        if (conversation.getMucOptions().online()) {
 355                            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received ping worthy error for seemingly online muc at " + from);
 356                            mXmppConnectionService.mucSelfPingAndRejoin(conversation);
 357                        }
 358                    }
 359                }
 360            }
 361            return true;
 362        }
 363        return false;
 364    }
 365
 366    @Override
 367    public void onMessagePacketReceived(Account account, MessagePacket original) {
 368        if (handleErrorMessage(account, original)) {
 369            return;
 370        }
 371        final MessagePacket packet;
 372        Long timestamp = null;
 373        boolean isCarbon = false;
 374        String serverMsgId = null;
 375        final Element fin = original.findChild("fin", MessageArchiveService.Version.MAM_0.namespace);
 376        if (fin != null) {
 377            mXmppConnectionService.getMessageArchiveService().processFinLegacy(fin, original.getFrom());
 378            return;
 379        }
 380        final Element result = MessageArchiveService.Version.findResult(original);
 381        final String queryId = result == null ? null : result.getAttribute("queryid");
 382        final MessageArchiveService.Query query = queryId == null ? null : mXmppConnectionService.getMessageArchiveService().findQuery(queryId);
 383        if (query != null && query.validFrom(original.getFrom())) {
 384            final Pair<MessagePacket, Long> f = original.getForwardedMessagePacket("result", query.version.namespace);
 385            if (f == null) {
 386                return;
 387            }
 388            timestamp = f.second;
 389            packet = f.first;
 390            serverMsgId = result.getAttribute("id");
 391            query.incrementMessageCount();
 392            if (handleErrorMessage(account, packet)) {
 393                return;
 394            }
 395        } else if (query != null) {
 396            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received mam result with invalid from (" + original.getFrom() + ") or queryId (" + queryId + ")");
 397            return;
 398        } else if (original.fromServer(account)) {
 399            Pair<MessagePacket, Long> f;
 400            f = original.getForwardedMessagePacket("received", Namespace.CARBONS);
 401            f = f == null ? original.getForwardedMessagePacket("sent", Namespace.CARBONS) : f;
 402            packet = f != null ? f.first : original;
 403            if (handleErrorMessage(account, packet)) {
 404                return;
 405            }
 406            timestamp = f != null ? f.second : null;
 407            isCarbon = f != null;
 408        } else {
 409            packet = original;
 410        }
 411
 412        if (timestamp == null) {
 413            timestamp = AbstractParser.parseTimestamp(original, AbstractParser.parseTimestamp(packet));
 414        }
 415        final Element mucUserElement = packet.findChild("x", Namespace.MUC_USER);
 416        final String pgpEncrypted = packet.findChildContent("x", "jabber:x:encrypted");
 417        Element replaceElement = packet.findChild("replace", "urn:xmpp:message-correct:0");
 418        Set<Message.FileParams> attachments = new LinkedHashSet<>();
 419        for (Element child : packet.getChildren()) {
 420            // SIMS first so they get preference in the set
 421            if (child.getName().equals("reference") && child.getNamespace().equals("urn:xmpp:reference:0")) {
 422                if (child.findChild("media-sharing", "urn:xmpp:sims:1") != null) {
 423                    attachments.add(new Message.FileParams(child));
 424                }
 425            }
 426        }
 427        for (Element child : packet.getChildren()) {
 428            if (child.getName().equals("x") && child.getNamespace().equals(Namespace.OOB)) {
 429                attachments.add(new Message.FileParams(child));
 430            }
 431        }
 432        String replacementId = replaceElement == null ? null : replaceElement.getAttribute("id");
 433        if (replacementId == null) {
 434            final Element fasten = packet.findChild("apply-to", "urn:xmpp:fasten:0");
 435            if (fasten != null) {
 436                replaceElement = fasten.findChild("retract", "urn:xmpp:message-retract:0");
 437                if (replaceElement == null) replaceElement = fasten.findChild("moderated", "urn:xmpp:message-moderate:0");
 438                if (replaceElement != null) {
 439                    final String reason = replaceElement.findChildContent("reason", "urn:xmpp:message-moderate:0");
 440                    replacementId = fasten.getAttribute("id");
 441                    packet.setBody(reason == null ? "" : reason);
 442                }
 443            }
 444        }
 445        LocalizedContent body = packet.getBody();
 446
 447        final Element axolotlEncrypted = packet.findChildEnsureSingle(XmppAxolotlMessage.CONTAINERTAG, AxolotlService.PEP_PREFIX);
 448        int status;
 449        final Jid counterpart;
 450        final Jid to = packet.getTo();
 451        final Jid from = packet.getFrom();
 452        final Element originId = packet.findChild("origin-id", Namespace.STANZA_IDS);
 453        final String remoteMsgId;
 454        if (originId != null && originId.getAttribute("id") != null) {
 455            remoteMsgId = originId.getAttribute("id");
 456        } else {
 457            remoteMsgId = packet.getId();
 458        }
 459        boolean notify = false;
 460
 461        Element html = packet.findChild("html", "http://jabber.org/protocol/xhtml-im");
 462        if (html != null && html.findChild("body", "http://www.w3.org/1999/xhtml") == null) {
 463            html = null;
 464        }
 465
 466        if (from == null || !InvalidJid.isValid(from) || !InvalidJid.isValid(to)) {
 467            Log.e(Config.LOGTAG, "encountered invalid message from='" + from + "' to='" + to + "'");
 468            return;
 469        }
 470
 471        boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
 472        if (query != null && !query.muc() && isTypeGroupChat) {
 473            Log.e(Config.LOGTAG, account.getJid().asBareJid() + ": received groupchat (" + from + ") message on regular MAM request. skipping");
 474            return;
 475        }
 476        boolean isMucStatusMessage = InvalidJid.hasValidFrom(packet) && from.isBareJid() && mucUserElement != null && mucUserElement.hasChild("status");
 477        boolean selfAddressed;
 478        if (packet.fromAccount(account)) {
 479            status = Message.STATUS_SEND;
 480            selfAddressed = to == null || account.getJid().asBareJid().equals(to.asBareJid());
 481            if (selfAddressed) {
 482                counterpart = from;
 483            } else {
 484                counterpart = to != null ? to : account.getJid();
 485            }
 486        } else {
 487            status = Message.STATUS_RECEIVED;
 488            counterpart = from;
 489            selfAddressed = false;
 490        }
 491
 492        final Invite invite = extractInvite(packet);
 493        if (invite != null) {
 494            if (isTypeGroupChat) {
 495                Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": ignoring invite to " + invite.jid + " because type=groupchat");
 496            } else if (invite.direct && (mucUserElement != null || invite.inviter == null || mXmppConnectionService.isMuc(account, invite.inviter))) {
 497                Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": ignoring direct invite to " + invite.jid + " because it was received in MUC");
 498            } else {
 499                invite.execute(account);
 500                return;
 501            }
 502        }
 503
 504        final Element reactions = packet.findChild("reactions", "urn:xmpp:reactions:0");
 505        if (body == null && html == null) {
 506            if (reactions != null && reactions.getAttribute("id") != null) {
 507                final Conversation conversation = mXmppConnectionService.find(account, counterpart.asBareJid());
 508                if (conversation != null) {
 509                    final Message reactionTo = conversation.findMessageWithRemoteIdAndCounterpart(reactions.getAttribute("id"), null);
 510                    if (reactionTo != null) {
 511                        String bodyS = reactionTo.reply().getBody();
 512                        for (Element el : reactions.getChildren()) {
 513                            if (el.getName().equals("reaction") && el.getNamespace().equals("urn:xmpp:reactions:0")) {
 514                                bodyS += el.getContent();
 515                            }
 516                        }
 517                        body = new LocalizedContent(bodyS, "en", 1);
 518                        final Message previousReaction = conversation.findMessageReactingTo(reactions.getAttribute("id"), counterpart);
 519                        if (previousReaction != null) replacementId = previousReaction.replyId();
 520                    }
 521                }
 522            }
 523        }
 524
 525        final Element webxdc = packet.findChild("x", "urn:xmpp:webxdc:0");
 526        if (webxdc != null) {
 527            final Conversation conversation = mXmppConnectionService.find(account, counterpart.asBareJid());
 528            Jid webxdcSender = counterpart.asBareJid();
 529            if (conversation.getMode() == Conversation.MODE_MULTI) {
 530                if(conversation.getMucOptions().nonanonymous()) {
 531                    webxdcSender = conversation.getMucOptions().getTrueCounterpart(counterpart);
 532                } else {
 533                    webxdcSender = counterpart;
 534                }
 535            }
 536            mXmppConnectionService.insertWebxdcUpdate(new WebxdcUpdate(
 537                conversation,
 538                counterpart,
 539                packet.findChild("thread"),
 540                body == null ? null : body.content,
 541                webxdc.findChildContent("document", "urn:xmpp:webxdc:0"),
 542                webxdc.findChildContent("summary", "urn:xmpp:webxdc:0"),
 543                webxdc.findChildContent("json", "urn:xmpp:json:0")
 544            ));
 545
 546            mXmppConnectionService.updateConversationUi();
 547        }
 548
 549        if ((body != null || pgpEncrypted != null || (axolotlEncrypted != null && axolotlEncrypted.hasChild("payload")) || !attachments.isEmpty() || html != null) && !isMucStatusMessage) {
 550            final boolean conversationIsProbablyMuc = isTypeGroupChat || mucUserElement != null || account.getXmppConnection().getMucServersWithholdAccount().contains(counterpart.getDomain().toEscapedString());
 551            final Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.asBareJid(), conversationIsProbablyMuc, false, query, false);
 552            final boolean conversationMultiMode = conversation.getMode() == Conversation.MODE_MULTI;
 553
 554            if (serverMsgId == null) {
 555                serverMsgId = extractStanzaId(packet, isTypeGroupChat, conversation);
 556            }
 557
 558
 559            if (selfAddressed) {
 560                if (mXmppConnectionService.markMessage(conversation, remoteMsgId, Message.STATUS_SEND_RECEIVED, serverMsgId)) {
 561                    return;
 562                }
 563                status = Message.STATUS_RECEIVED;
 564                if (remoteMsgId != null && conversation.findMessageWithRemoteId(remoteMsgId, counterpart) != null) {
 565                    return;
 566                }
 567            }
 568
 569            if (isTypeGroupChat) {
 570                if (conversation.getMucOptions().isSelf(counterpart)) {
 571                    status = Message.STATUS_SEND_RECEIVED;
 572                    isCarbon = true; //not really carbon but received from another resource
 573                    if (mXmppConnectionService.markMessage(conversation, remoteMsgId, status, serverMsgId, body)) {
 574                        return;
 575                    } else if (remoteMsgId == null || Config.IGNORE_ID_REWRITE_IN_MUC) {
 576                        if (body != null) {
 577                            Message message = conversation.findSentMessageWithBody(body.content);
 578                            if (message != null) {
 579                                mXmppConnectionService.markMessage(message, status);
 580                                return;
 581                            }
 582                        }
 583                    }
 584                } else {
 585                    status = Message.STATUS_RECEIVED;
 586                }
 587            }
 588            final Message message;
 589            if (pgpEncrypted != null && Config.supportOpenPgp()) {
 590                message = new Message(conversation, pgpEncrypted, Message.ENCRYPTION_PGP, status);
 591            } else if (axolotlEncrypted != null && Config.supportOmemo()) {
 592                Jid origin;
 593                Set<Jid> fallbacksBySourceId = Collections.emptySet();
 594                if (conversationMultiMode) {
 595                    final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
 596                    origin = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
 597                    if (origin == null) {
 598                        try {
 599                            fallbacksBySourceId = account.getAxolotlService().findCounterpartsBySourceId(XmppAxolotlMessage.parseSourceId(axolotlEncrypted));
 600                        } catch (IllegalArgumentException e) {
 601                            //ignoring
 602                        }
 603                    }
 604                    if (origin == null && fallbacksBySourceId.size() == 0) {
 605                        Log.d(Config.LOGTAG, "axolotl message in anonymous conference received and no possible fallbacks");
 606                        return;
 607                    }
 608                } else {
 609                    fallbacksBySourceId = Collections.emptySet();
 610                    origin = from;
 611                }
 612
 613                final boolean liveMessage = query == null && !isTypeGroupChat && mucUserElement == null;
 614                final boolean checkedForDuplicates = liveMessage || (serverMsgId != null && remoteMsgId != null && !conversation.possibleDuplicate(serverMsgId, remoteMsgId));
 615
 616                if (origin != null) {
 617                    message = parseAxolotlChat(axolotlEncrypted, origin, conversation, status, checkedForDuplicates, query != null);
 618                } else {
 619                    Message trial = null;
 620                    for (Jid fallback : fallbacksBySourceId) {
 621                        trial = parseAxolotlChat(axolotlEncrypted, fallback, conversation, status, checkedForDuplicates && fallbacksBySourceId.size() == 1, query != null);
 622                        if (trial != null) {
 623                            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": decoded muc message using fallback");
 624                            origin = fallback;
 625                            break;
 626                        }
 627                    }
 628                    message = trial;
 629                }
 630                if (message == null) {
 631                    if (query == null && extractChatState(mXmppConnectionService.find(account, counterpart.asBareJid()), isTypeGroupChat, packet)) {
 632                        mXmppConnectionService.updateConversationUi();
 633                    }
 634                    if (query != null && status == Message.STATUS_SEND && remoteMsgId != null) {
 635                        Message previouslySent = conversation.findSentMessageWithUuid(remoteMsgId);
 636                        if (previouslySent != null && previouslySent.getServerMsgId() == null && serverMsgId != null) {
 637                            previouslySent.setServerMsgId(serverMsgId);
 638                            mXmppConnectionService.databaseBackend.updateMessage(previouslySent, false);
 639                            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": encountered previously sent OMEMO message without serverId. updating...");
 640                        }
 641                    }
 642                    return;
 643                }
 644                if (conversationMultiMode) {
 645                    message.setTrueCounterpart(origin);
 646                }
 647            } else if (body == null && !attachments.isEmpty()) {
 648                message = new Message(conversation, "", Message.ENCRYPTION_NONE, status);
 649            } else {
 650                message = new Message(conversation, body == null ? "HTML-only message" : body.content, Message.ENCRYPTION_NONE, status);
 651                if (body != null && body.count > 1) {
 652                    message.setBodyLanguage(body.language);
 653                }
 654            }
 655
 656            Element addresses = packet.findChild("addresses", "http://jabber.org/protocol/address");
 657            if (status == Message.STATUS_RECEIVED && addresses != null) {
 658                for (Element address : addresses.getChildren()) {
 659                    if (!address.getName().equals("address") || !address.getNamespace().equals("http://jabber.org/protocol/address")) continue;
 660
 661                    if (address.getAttribute("type").equals("ofrom") && address.getAttribute("jid") != null) {
 662                        Jid ofrom = address.getAttributeAsJid("jid");
 663                        if (InvalidJid.isValid(ofrom) && ofrom.getDomain().equals(counterpart.getDomain()) &&
 664                            conversation.getAccount().getRoster().getContact(counterpart.getDomain()).getPresences().anySupport("http://jabber.org/protocol/address")) {
 665
 666                            message.setTrueCounterpart(ofrom);
 667                        }
 668                    }
 669                }
 670            }
 671
 672            if (html != null) message.addPayload(html);
 673            message.setSubject(packet.findChildContent("subject"));
 674            message.setCounterpart(counterpart);
 675            message.setRemoteMsgId(remoteMsgId);
 676            message.setServerMsgId(serverMsgId);
 677            message.setCarbon(isCarbon);
 678            message.setTime(timestamp);
 679            if (!attachments.isEmpty()) {
 680                message.setFileParams(attachments.iterator().next());
 681                if (CryptoHelper.isPgpEncryptedUrl(message.getFileParams().url)) {
 682                    message.setEncryption(Message.ENCRYPTION_DECRYPTED);
 683                }
 684            }
 685            message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
 686            if (reactions != null) message.addPayload(reactions);
 687            for (Element el : packet.getChildren()) {
 688                if ((el.getName().equals("query") && el.getNamespace().equals("http://jabber.org/protocol/disco#items") && el.getAttribute("node").equals("http://jabber.org/protocol/commands")) ||
 689                    (el.getName().equals("fallback") && el.getNamespace().equals("urn:xmpp:fallback:0"))) {
 690                    message.addPayload(el);
 691                }
 692                if (el.getName().equals("thread") && (el.getNamespace() == null || el.getNamespace().equals("jabber:client"))) {
 693                    el.setAttribute("xmlns", "jabber:client");
 694                    message.addPayload(el);
 695                }
 696                if (el.getName().equals("reply") && el.getNamespace() != null && el.getNamespace().equals("urn:xmpp:reply:0")) {
 697                    message.addPayload(el);
 698                }
 699                if (el.getName().equals("attention") && el.getNamespace() != null && el.getNamespace().equals("urn:xmpp:attention:0")) {
 700                    message.addPayload(el);
 701                }
 702            }
 703            if (conversationMultiMode) {
 704                message.setMucUser(conversation.getMucOptions().findUserByFullJid(counterpart));
 705                final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
 706                Jid trueCounterpart;
 707                if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
 708                    trueCounterpart = message.getTrueCounterpart();
 709                } else if (query != null && query.safeToExtractTrueCounterpart()) {
 710                    trueCounterpart = getTrueCounterpart(mucUserElement, fallback);
 711                } else {
 712                    trueCounterpart = fallback;
 713                }
 714                if (trueCounterpart != null && isTypeGroupChat) {
 715                    if (trueCounterpart.asBareJid().equals(account.getJid().asBareJid())) {
 716                        status = isTypeGroupChat ? Message.STATUS_SEND_RECEIVED : Message.STATUS_SEND;
 717                    } else {
 718                        status = Message.STATUS_RECEIVED;
 719                        message.setCarbon(false);
 720                    }
 721                }
 722                message.setStatus(status);
 723                message.setTrueCounterpart(trueCounterpart);
 724                if (!isTypeGroupChat) {
 725                    message.setType(Message.TYPE_PRIVATE);
 726                }
 727            } else {
 728                updateLastseen(account, from);
 729            }
 730
 731            if (replacementId != null && mXmppConnectionService.allowMessageCorrection()) {
 732                final Message replacedMessage = conversation.findMessageWithRemoteIdAndCounterpart(replacementId, counterpart);
 733                if (replacedMessage != null) {
 734                    final boolean fingerprintsMatch = replacedMessage.getFingerprint() == null
 735                            || replacedMessage.getFingerprint().equals(message.getFingerprint());
 736                    final boolean trueCountersMatch = replacedMessage.getTrueCounterpart() != null
 737                            && message.getTrueCounterpart() != null
 738                            && replacedMessage.getTrueCounterpart().asBareJid().equals(message.getTrueCounterpart().asBareJid());
 739                    final boolean mucUserMatches = query == null && replacedMessage.sameMucUser(message); //can not be checked when using mam
 740                    final boolean duplicate = conversation.hasDuplicateMessage(message);
 741                    if (fingerprintsMatch && (trueCountersMatch || !conversationMultiMode || mucUserMatches || counterpart.isBareJid()) && !duplicate) {
 742                        Log.d(Config.LOGTAG, "replaced message '" + replacedMessage.getBody() + "' with '" + message.getBody() + "'");
 743                        synchronized (replacedMessage) {
 744                            final String uuid = replacedMessage.getUuid();
 745                            replacedMessage.setUuid(UUID.randomUUID().toString());
 746                            replacedMessage.setBody(message.getBody());
 747                            replacedMessage.putEdited(replacedMessage.getRemoteMsgId(), replacedMessage.getServerMsgId());
 748                            replacedMessage.setRemoteMsgId(remoteMsgId);
 749                            if (replaceElement != null && !replaceElement.getName().equals("replace")) {
 750                                mXmppConnectionService.getFileBackend().deleteFile(replacedMessage);
 751                                mXmppConnectionService.evictPreview(message.getUuid());
 752                                replacedMessage.clearPayloads();
 753                                replacedMessage.setFileParams(null);
 754                                replacedMessage.setDeleted(true);
 755                                replacedMessage.addPayload(replaceElement);
 756                            }
 757                            if (replacedMessage.getServerMsgId() == null || message.getServerMsgId() != null) {
 758                                replacedMessage.setServerMsgId(message.getServerMsgId());
 759                            }
 760                            replacedMessage.setEncryption(message.getEncryption());
 761                            if (replacedMessage.getStatus() == Message.STATUS_RECEIVED) {
 762                                replacedMessage.markUnread();
 763                            }
 764                            extractChatState(mXmppConnectionService.find(account, counterpart.asBareJid()), isTypeGroupChat, packet);
 765                            mXmppConnectionService.updateMessage(replacedMessage, uuid);
 766                            if (mXmppConnectionService.confirmMessages()
 767                                    && replacedMessage.getStatus() == Message.STATUS_RECEIVED
 768                                    && (replacedMessage.trusted() || replacedMessage.isPrivateMessage()) //TODO do we really want to send receipts for all PMs?
 769                                    && remoteMsgId != null
 770                                    && !selfAddressed
 771                                    && !isTypeGroupChat) {
 772                                processMessageReceipts(account, packet, remoteMsgId, query);
 773                            }
 774                            if (replacedMessage.getEncryption() == Message.ENCRYPTION_PGP) {
 775                                conversation.getAccount().getPgpDecryptionService().discard(replacedMessage);
 776                                conversation.getAccount().getPgpDecryptionService().decrypt(replacedMessage, false);
 777                            }
 778                        }
 779                        mXmppConnectionService.getNotificationService().updateNotification();
 780                        return;
 781                    } else {
 782                        Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received message correction but verification didn't check out");
 783                    }
 784                } else if (message.getBody() == null || message.getBody().equals("") || message.getBody().equals(" ")) {
 785                    return;
 786                }
 787            }
 788
 789            long deletionDate = mXmppConnectionService.getAutomaticMessageDeletionDate();
 790            if (deletionDate != 0 && message.getTimeSent() < deletionDate) {
 791                Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": skipping message from " + message.getCounterpart().toString() + " because it was sent prior to our deletion date");
 792                return;
 793            }
 794
 795            boolean checkForDuplicates = (isTypeGroupChat && packet.hasChild("delay", "urn:xmpp:delay"))
 796                    || message.isPrivateMessage()
 797                    || message.getServerMsgId() != null
 798                    || (query == null && mXmppConnectionService.getMessageArchiveService().isCatchupInProgress(conversation));
 799            if (checkForDuplicates) {
 800                final Message duplicate = conversation.findDuplicateMessage(message);
 801                if (duplicate != null) {
 802                    final boolean serverMsgIdUpdated;
 803                    if (duplicate.getStatus() != Message.STATUS_RECEIVED
 804                            && duplicate.getUuid().equals(message.getRemoteMsgId())
 805                            && duplicate.getServerMsgId() == null
 806                            && message.getServerMsgId() != null) {
 807                        duplicate.setServerMsgId(message.getServerMsgId());
 808                        if (mXmppConnectionService.databaseBackend.updateMessage(duplicate, false)) {
 809                            serverMsgIdUpdated = true;
 810                        } else {
 811                            serverMsgIdUpdated = false;
 812                            Log.e(Config.LOGTAG, "failed to update message");
 813                        }
 814                    } else {
 815                        serverMsgIdUpdated = false;
 816                    }
 817                    Log.d(Config.LOGTAG, "skipping duplicate message with " + message.getCounterpart() + ". serverMsgIdUpdated=" + serverMsgIdUpdated);
 818                    return;
 819                }
 820            }
 821
 822            if (query != null && query.getPagingOrder() == MessageArchiveService.PagingOrder.REVERSE) {
 823                conversation.prepend(query.getActualInThisQuery(), message);
 824            } else {
 825                conversation.add(message);
 826            }
 827            if (query != null) {
 828                query.incrementActualMessageCount();
 829            }
 830
 831            if (query == null || query.isCatchup()) { //either no mam or catchup
 832                if (status == Message.STATUS_SEND || status == Message.STATUS_SEND_RECEIVED) {
 833                    mXmppConnectionService.markRead(conversation);
 834                    if (query == null) {
 835                        activateGracePeriod(account);
 836                    }
 837                } else {
 838                    message.markUnread();
 839                    notify = true;
 840                }
 841            }
 842
 843            if (message.getEncryption() == Message.ENCRYPTION_PGP) {
 844                notify = conversation.getAccount().getPgpDecryptionService().decrypt(message, notify);
 845            } else if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL_NOT_FOR_THIS_DEVICE || message.getEncryption() == Message.ENCRYPTION_AXOLOTL_FAILED) {
 846                notify = false;
 847            }
 848
 849            if (query == null) {
 850                extractChatState(mXmppConnectionService.find(account, counterpart.asBareJid()), isTypeGroupChat, packet);
 851                mXmppConnectionService.updateConversationUi();
 852            }
 853
 854            if (mXmppConnectionService.confirmMessages()
 855                    && message.getStatus() == Message.STATUS_RECEIVED
 856                    && (message.trusted() || message.isPrivateMessage())
 857                    && remoteMsgId != null
 858                    && !selfAddressed
 859                    && !isTypeGroupChat) {
 860                processMessageReceipts(account, packet, remoteMsgId, query);
 861            }
 862
 863            if (message.getFileParams() != null) {
 864                for (Cid cid : message.getFileParams().getCids()) {
 865                    File f = mXmppConnectionService.getFileForCid(cid);
 866                    if (f != null && f.canRead()) {
 867                        message.setRelativeFilePath(f.getAbsolutePath());
 868                        mXmppConnectionService.getFileBackend().updateFileParams(message, null, false);
 869                        break;
 870                    }
 871                }
 872            }
 873
 874            mXmppConnectionService.databaseBackend.createMessage(message);
 875
 876            final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
 877            if (message.getRelativeFilePath() == null && message.trusted() && message.treatAsDownloadable() && manager.getAutoAcceptFileSize() > 0) {
 878                if (message.getOob() != null && message.getOob().getScheme().equalsIgnoreCase("cid")) {
 879                    try {
 880                        BobTransfer transfer = new BobTransfer.ForMessage(message, mXmppConnectionService);
 881                        message.setTransferable(transfer);
 882                        transfer.start();
 883                    } catch (URISyntaxException e) {
 884                        Log.d(Config.LOGTAG, "BobTransfer failed to parse URI");
 885                    }
 886                } else {
 887                    manager.createNewDownloadConnection(message);
 888                }
 889            } else if (notify) {
 890                if (query != null && query.isCatchup()) {
 891                    mXmppConnectionService.getNotificationService().pushFromBacklog(message);
 892                } else {
 893                    mXmppConnectionService.getNotificationService().push(message);
 894                }
 895            }
 896        } else if (!packet.hasChild("body")) { //no body
 897
 898            final Conversation conversation = mXmppConnectionService.find(account, from.asBareJid());
 899            if (axolotlEncrypted != null) {
 900                Jid origin;
 901                if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
 902                    final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
 903                    origin = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
 904                    if (origin == null) {
 905                        Log.d(Config.LOGTAG, "omemo key transport message in anonymous conference received");
 906                        return;
 907                    }
 908                } else if (isTypeGroupChat) {
 909                    return;
 910                } else {
 911                    origin = from;
 912                }
 913                try {
 914                    final XmppAxolotlMessage xmppAxolotlMessage = XmppAxolotlMessage.fromElement(axolotlEncrypted, origin.asBareJid());
 915                    account.getAxolotlService().processReceivingKeyTransportMessage(xmppAxolotlMessage, query != null);
 916                    Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": omemo key transport message received from " + origin);
 917                } catch (Exception e) {
 918                    Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": invalid omemo key transport message received " + e.getMessage());
 919                    return;
 920                }
 921            }
 922
 923            if (query == null && extractChatState(mXmppConnectionService.find(account, counterpart.asBareJid()), isTypeGroupChat, packet)) {
 924                mXmppConnectionService.updateConversationUi();
 925            }
 926
 927            if (isTypeGroupChat) {
 928                if (packet.hasChild("subject")) { //TODO usually we would want to check for lack of body; however some servers do set a body :(
 929                    if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
 930                        conversation.setHasMessagesLeftOnServer(conversation.countMessages() > 0);
 931                        final LocalizedContent subject = packet.findInternationalizedChildContentInDefaultNamespace("subject");
 932                        if (subject != null && conversation.getMucOptions().setSubject(subject.content)) {
 933                            mXmppConnectionService.updateConversation(conversation);
 934                        }
 935                        mXmppConnectionService.updateConversationUi();
 936                        return;
 937                    }
 938                }
 939            }
 940            if (conversation != null && mucUserElement != null && InvalidJid.hasValidFrom(packet) && from.isBareJid()) {
 941                for (Element child : mucUserElement.getChildren()) {
 942                    if ("status".equals(child.getName())) {
 943                        try {
 944                            int code = Integer.parseInt(child.getAttribute("code"));
 945                            if ((code >= 170 && code <= 174) || (code >= 102 && code <= 104)) {
 946                                mXmppConnectionService.fetchConferenceConfiguration(conversation);
 947                                break;
 948                            }
 949                        } catch (Exception e) {
 950                            //ignored
 951                        }
 952                    } else if ("item".equals(child.getName())) {
 953                        MucOptions.User user = AbstractParser.parseItem(conversation, child);
 954                        Log.d(Config.LOGTAG, account.getJid() + ": changing affiliation for "
 955                                + user.getRealJid() + " to " + user.getAffiliation() + " in "
 956                                + conversation.getJid().asBareJid());
 957                        if (!user.realJidMatchesAccount()) {
 958                            boolean isNew = conversation.getMucOptions().updateUser(user);
 959                            mXmppConnectionService.getAvatarService().clear(conversation);
 960                            mXmppConnectionService.updateMucRosterUi();
 961                            mXmppConnectionService.updateConversationUi();
 962                            Contact contact = user.getContact();
 963                            if (!user.getAffiliation().ranks(MucOptions.Affiliation.MEMBER)) {
 964                                Jid jid = user.getRealJid();
 965                                List<Jid> cryptoTargets = conversation.getAcceptedCryptoTargets();
 966                                if (cryptoTargets.remove(user.getRealJid())) {
 967                                    Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": removed " + jid + " from crypto targets of " + conversation.getName());
 968                                    conversation.setAcceptedCryptoTargets(cryptoTargets);
 969                                    mXmppConnectionService.updateConversation(conversation);
 970                                }
 971                            } else if (isNew
 972                                    && user.getRealJid() != null
 973                                    && conversation.getMucOptions().isPrivateAndNonAnonymous()
 974                                    && (contact == null || !contact.mutualPresenceSubscription())
 975                                    && account.getAxolotlService().hasEmptyDeviceList(user.getRealJid())) {
 976                                account.getAxolotlService().fetchDeviceIds(user.getRealJid());
 977                            }
 978                        }
 979                    }
 980                }
 981            }
 982            if (!isTypeGroupChat) {
 983                for (Element child : packet.getChildren()) {
 984                    if (Namespace.JINGLE_MESSAGE.equals(child.getNamespace()) && JINGLE_MESSAGE_ELEMENT_NAMES.contains(child.getName())) {
 985                        final String action = child.getName();
 986                        final String sessionId = child.getAttribute("id");
 987                        if (sessionId == null) {
 988                            break;
 989                        }
 990                        if (query == null) {
 991                            if (serverMsgId == null) {
 992                                serverMsgId = extractStanzaId(account, packet);
 993                            }
 994                            mXmppConnectionService.getJingleConnectionManager().deliverMessage(account, packet.getTo(), packet.getFrom(), child, remoteMsgId, serverMsgId, timestamp);
 995                            if (!account.getJid().asBareJid().equals(from.asBareJid()) && remoteMsgId != null) {
 996                                processMessageReceipts(account, packet, remoteMsgId, query);
 997                            }
 998                        } else if (query.isCatchup()) {
 999                            if ("propose".equals(action)) {
1000                                final Element description = child.findChild("description");
1001                                final String namespace = description == null ? null : description.getNamespace();
1002                                if (Namespace.JINGLE_APPS_RTP.equals(namespace)) {
1003                                    final Conversation c = mXmppConnectionService.findOrCreateConversation(account, counterpart.asBareJid(), false, false);
1004                                    final Message preExistingMessage = c.findRtpSession(sessionId, status);
1005                                    if (preExistingMessage != null) {
1006                                        preExistingMessage.setServerMsgId(serverMsgId);
1007                                        mXmppConnectionService.updateMessage(preExistingMessage);
1008                                        break;
1009                                    }
1010                                    final Message message = new Message(
1011                                            c,
1012                                            status,
1013                                            Message.TYPE_RTP_SESSION,
1014                                            sessionId
1015                                    );
1016                                    message.setServerMsgId(serverMsgId);
1017                                    message.setTime(timestamp);
1018                                    message.setBody(new RtpSessionStatus(false, 0).toString());
1019                                    c.add(message);
1020                                    mXmppConnectionService.databaseBackend.createMessage(message);
1021                                }
1022                            } else if ("proceed".equals(action)) {
1023                                //status needs to be flipped to find the original propose
1024                                final Conversation c = mXmppConnectionService.findOrCreateConversation(account, counterpart.asBareJid(), false, false);
1025                                final int s = packet.fromAccount(account) ? Message.STATUS_RECEIVED : Message.STATUS_SEND;
1026                                final Message message = c.findRtpSession(sessionId, s);
1027                                if (message != null) {
1028                                    message.setBody(new RtpSessionStatus(true, 0).toString());
1029                                    if (serverMsgId != null) {
1030                                        message.setServerMsgId(serverMsgId);
1031                                    }
1032                                    message.setTime(timestamp);
1033                                    mXmppConnectionService.updateMessage(message, true);
1034                                } else {
1035                                    Log.d(Config.LOGTAG, "unable to find original rtp session message for received propose");
1036                                }
1037
1038                            }
1039                        } else {
1040                            //MAM reloads (non catchups
1041                            if ("propose".equals(action)) {
1042                                final Element description = child.findChild("description");
1043                                final String namespace = description == null ? null : description.getNamespace();
1044                                if (Namespace.JINGLE_APPS_RTP.equals(namespace)) {
1045                                    final Conversation c = mXmppConnectionService.findOrCreateConversation(account, counterpart.asBareJid(), false, false);
1046                                    final Message preExistingMessage = c.findRtpSession(sessionId, status);
1047                                    if (preExistingMessage != null) {
1048                                        preExistingMessage.setServerMsgId(serverMsgId);
1049                                        mXmppConnectionService.updateMessage(preExistingMessage);
1050                                        break;
1051                                    }
1052                                    final Message message = new Message(
1053                                            c,
1054                                            status,
1055                                            Message.TYPE_RTP_SESSION,
1056                                            sessionId
1057                                    );
1058                                    message.setServerMsgId(serverMsgId);
1059                                    message.setTime(timestamp);
1060                                    message.setBody(new RtpSessionStatus(true, 0).toString());
1061                                    if (query.getPagingOrder() == MessageArchiveService.PagingOrder.REVERSE) {
1062                                        c.prepend(query.getActualInThisQuery(), message);
1063                                    } else {
1064                                        c.add(message);
1065                                    }
1066                                    query.incrementActualMessageCount();
1067                                    mXmppConnectionService.databaseBackend.createMessage(message);
1068                                }
1069                            }
1070                        }
1071                        break;
1072                    }
1073                }
1074            }
1075        }
1076
1077        Element received = packet.findChild("received", "urn:xmpp:chat-markers:0");
1078        if (received == null) {
1079            received = packet.findChild("received", "urn:xmpp:receipts");
1080        }
1081        if (received != null) {
1082            String id = received.getAttribute("id");
1083            if (packet.fromAccount(account)) {
1084                if (query != null && id != null && packet.getTo() != null) {
1085                    query.removePendingReceiptRequest(new ReceiptRequest(packet.getTo(), id));
1086                }
1087            } else if (id != null) {
1088                if (id.startsWith(JingleRtpConnection.JINGLE_MESSAGE_PROPOSE_ID_PREFIX)) {
1089                    final String sessionId = id.substring(JingleRtpConnection.JINGLE_MESSAGE_PROPOSE_ID_PREFIX.length());
1090                    mXmppConnectionService.getJingleConnectionManager()
1091                            .updateProposedSessionDiscovered(account, from, sessionId, JingleConnectionManager.DeviceDiscoveryState.DISCOVERED);
1092                } else {
1093                    mXmppConnectionService.markMessage(account, from.asBareJid(), id, Message.STATUS_SEND_RECEIVED);
1094                }
1095            }
1096        }
1097        Element displayed = packet.findChild("displayed", "urn:xmpp:chat-markers:0");
1098        if (displayed != null) {
1099            final String id = displayed.getAttribute("id");
1100            final Jid sender = InvalidJid.getNullForInvalid(displayed.getAttributeAsJid("sender"));
1101            if (packet.fromAccount(account) && !selfAddressed) {
1102                dismissNotification(account, counterpart, query, id);
1103                if (query == null) {
1104                    activateGracePeriod(account);
1105                }
1106            } else if (isTypeGroupChat) {
1107                final Conversation conversation = mXmppConnectionService.find(account, counterpart.asBareJid());
1108                final Message message;
1109                if (conversation != null && id != null) {
1110                    if (sender != null) {
1111                        message = conversation.findMessageWithRemoteId(id, sender);
1112                    } else {
1113                        message = conversation.findMessageWithServerMsgId(id);
1114                    }
1115                } else {
1116                    message = null;
1117                }
1118                if (message != null) {
1119                    final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
1120                    final Jid trueJid = getTrueCounterpart((query != null && query.safeToExtractTrueCounterpart()) ? mucUserElement : null, fallback);
1121                    final boolean trueJidMatchesAccount = account.getJid().asBareJid().equals(trueJid == null ? null : trueJid.asBareJid());
1122                    if (trueJidMatchesAccount || conversation.getMucOptions().isSelf(counterpart)) {
1123                        if (!message.isRead() && (query == null || query.isCatchup())) { //checking if message is unread fixes race conditions with reflections
1124                            mXmppConnectionService.markRead(conversation);
1125                        }
1126                    } else if (!counterpart.isBareJid() && trueJid != null) {
1127                        final ReadByMarker readByMarker = ReadByMarker.from(counterpart, trueJid);
1128                        if (message.addReadByMarker(readByMarker)) {
1129                            mXmppConnectionService.updateMessage(message, false);
1130                        }
1131                    }
1132                }
1133            } else {
1134                final Message displayedMessage = mXmppConnectionService.markMessage(account, from.asBareJid(), id, Message.STATUS_SEND_DISPLAYED);
1135                Message message = displayedMessage == null ? null : displayedMessage.prev();
1136                while (message != null
1137                        && message.getStatus() == Message.STATUS_SEND_RECEIVED
1138                        && message.getTimeSent() < displayedMessage.getTimeSent()) {
1139                    mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
1140                    message = message.prev();
1141                }
1142                if (displayedMessage != null && selfAddressed) {
1143                    dismissNotification(account, counterpart, query, id);
1144                }
1145            }
1146        }
1147
1148        final Element event = original.findChild("event", "http://jabber.org/protocol/pubsub#event");
1149        if (event != null && InvalidJid.hasValidFrom(original) && original.getFrom().isBareJid()) {
1150            if (event.hasChild("items")) {
1151                parseEvent(event, original.getFrom(), account);
1152            } else if (event.hasChild("delete")) {
1153                parseDeleteEvent(event, original.getFrom(), account);
1154            } else if (event.hasChild("purge")) {
1155                parsePurgeEvent(event, original.getFrom(), account);
1156            }
1157        }
1158
1159        final String nick = packet.findChildContent("nick", Namespace.NICK);
1160        if (nick != null && InvalidJid.hasValidFrom(original)) {
1161            if (mXmppConnectionService.isMuc(account, from)) {
1162                return;
1163            }
1164            final Contact contact = account.getRoster().getContact(from);
1165            if (contact.setPresenceName(nick)) {
1166                mXmppConnectionService.syncRoster(account);
1167                mXmppConnectionService.getAvatarService().clear(contact);
1168            }
1169        }
1170    }
1171
1172    private void dismissNotification(Account account, Jid counterpart, MessageArchiveService.Query query, final String id) {
1173        final Conversation conversation = mXmppConnectionService.find(account, counterpart.asBareJid());
1174        if (conversation != null && (query == null || query.isCatchup())) {
1175            final String displayableId = conversation.findMostRecentRemoteDisplayableId();
1176            if (displayableId != null && displayableId.equals(id)) {
1177                mXmppConnectionService.markRead(conversation);
1178            } else {
1179                Log.w(Config.LOGTAG, account.getJid().asBareJid() + ": received dismissing display marker that did not match our last id in that conversation");
1180            }
1181        }
1182    }
1183
1184    private void processMessageReceipts(final Account account, final MessagePacket packet, final String remoteMsgId, MessageArchiveService.Query query) {
1185        final boolean markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
1186        final boolean request = packet.hasChild("request", "urn:xmpp:receipts");
1187        if (query == null) {
1188            final ArrayList<String> receiptsNamespaces = new ArrayList<>();
1189            if (markable) {
1190                receiptsNamespaces.add("urn:xmpp:chat-markers:0");
1191            }
1192            if (request) {
1193                receiptsNamespaces.add("urn:xmpp:receipts");
1194            }
1195            if (receiptsNamespaces.size() > 0) {
1196                final MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
1197                        packet.getFrom(),
1198                        remoteMsgId,
1199                        receiptsNamespaces,
1200                        packet.getType());
1201                mXmppConnectionService.sendMessagePacket(account, receipt);
1202            }
1203        } else if (query.isCatchup()) {
1204            if (request) {
1205                query.addPendingReceiptRequest(new ReceiptRequest(packet.getFrom(), remoteMsgId));
1206            }
1207        }
1208    }
1209
1210    private void activateGracePeriod(Account account) {
1211        long duration = mXmppConnectionService.getLongPreference("grace_period_length", R.integer.grace_period) * 1000;
1212        Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": activating grace period till " + TIME_FORMAT.format(new Date(System.currentTimeMillis() + duration)));
1213        account.activateGracePeriod(duration);
1214    }
1215
1216    private class Invite {
1217        final Jid jid;
1218        final String password;
1219        final boolean direct;
1220        final Jid inviter;
1221
1222        Invite(Jid jid, String password, boolean direct, Jid inviter) {
1223            this.jid = jid;
1224            this.password = password;
1225            this.direct = direct;
1226            this.inviter = inviter;
1227        }
1228
1229        public boolean execute(Account account) {
1230            if (jid != null) {
1231                Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, jid, true, false);
1232                if (conversation.getMucOptions().online()) {
1233                    Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received invite to " + jid + " but muc is considered to be online");
1234                    mXmppConnectionService.mucSelfPingAndRejoin(conversation);
1235                } else {
1236                    conversation.getMucOptions().setPassword(password);
1237                    mXmppConnectionService.databaseBackend.updateConversation(conversation);
1238                    final Contact contact = inviter != null ? account.getRoster().getContactFromContactList(inviter) : null;
1239                    mXmppConnectionService.joinMuc(conversation, contact != null && contact.mutualPresenceSubscription());
1240                    mXmppConnectionService.updateConversationUi();
1241                }
1242                return true;
1243            }
1244            return false;
1245        }
1246    }
1247}