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