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 {
 275            Log.d(Config.LOGTAG, account.getJid().asBareJid() + " received pubsub notification for node=" + node);
 276        }
 277    }
 278
 279    private void parseDeleteEvent(final Element event, final Jid from, final Account account) {
 280        final Element delete = event.findChild("delete");
 281        final String node = delete == null ? null : delete.getAttribute("node");
 282        if (Namespace.NICK.equals(node)) {
 283            Log.d(Config.LOGTAG, "parsing nick delete event from " + from);
 284            setNick(account, from, null);
 285        } else if (Namespace.BOOKMARKS2.equals(node) && account.getJid().asBareJid().equals(from)) {
 286            account.setBookmarks(Collections.emptyMap());
 287            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": deleted bookmarks node");
 288        } else if (Namespace.AVATAR_METADATA.equals(node) && account.getJid().asBareJid().equals(from)) {
 289            Log.d(Config.LOGTAG,account.getJid().asBareJid()+": deleted avatar metadata node");
 290        }
 291    }
 292
 293    private void parsePurgeEvent(final Element event, final Jid from, final Account account) {
 294        final Element purge = event.findChild("purge");
 295        final String node = purge == null ? null : purge.getAttribute("node");
 296        if (Namespace.BOOKMARKS2.equals(node) && account.getJid().asBareJid().equals(from)) {
 297            account.setBookmarks(Collections.emptyMap());
 298            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": purged bookmarks");
 299        }
 300    }
 301
 302    private void setNick(Account account, Jid user, String nick) {
 303        if (user.asBareJid().equals(account.getJid().asBareJid())) {
 304            account.setDisplayName(nick);
 305            if (QuickConversationsService.isQuicksy()) {
 306                mXmppConnectionService.getAvatarService().clear(account);
 307            }
 308        } else {
 309            Contact contact = account.getRoster().getContact(user);
 310            if (contact.setPresenceName(nick)) {
 311                mXmppConnectionService.syncRoster(account);
 312                mXmppConnectionService.getAvatarService().clear(contact);
 313            }
 314        }
 315        mXmppConnectionService.updateConversationUi();
 316        mXmppConnectionService.updateAccountUi();
 317    }
 318
 319    private boolean handleErrorMessage(final Account account, final MessagePacket packet) {
 320        if (packet.getType() == MessagePacket.TYPE_ERROR) {
 321            if (packet.fromServer(account)) {
 322                final Pair<MessagePacket, Long> forwarded = packet.getForwardedMessagePacket("received", Namespace.CARBONS);
 323                if (forwarded != null) {
 324                    return handleErrorMessage(account, forwarded.first);
 325                }
 326            }
 327            final Jid from = packet.getFrom();
 328            final String id = packet.getId();
 329            if (from != null && id != null) {
 330                if (id.startsWith(JingleRtpConnection.JINGLE_MESSAGE_PROPOSE_ID_PREFIX)) {
 331                    final String sessionId = id.substring(JingleRtpConnection.JINGLE_MESSAGE_PROPOSE_ID_PREFIX.length());
 332                    mXmppConnectionService.getJingleConnectionManager()
 333                            .updateProposedSessionDiscovered(account, from, sessionId, JingleConnectionManager.DeviceDiscoveryState.FAILED);
 334                    return true;
 335                }
 336                if (id.startsWith(JingleRtpConnection.JINGLE_MESSAGE_PROCEED_ID_PREFIX)) {
 337                    final String sessionId = id.substring(JingleRtpConnection.JINGLE_MESSAGE_PROCEED_ID_PREFIX.length());
 338                    final String message = extractErrorMessage(packet);
 339                    mXmppConnectionService.getJingleConnectionManager().failProceed(account, from, sessionId, message);
 340                    return true;
 341                }
 342                mXmppConnectionService.markMessage(account,
 343                        from.asBareJid(),
 344                        id,
 345                        Message.STATUS_SEND_FAILED,
 346                        extractErrorMessage(packet));
 347                final Element error = packet.findChild("error");
 348                final boolean pingWorthyError = error != null && (error.hasChild("not-acceptable") || error.hasChild("remote-server-timeout") || error.hasChild("remote-server-not-found"));
 349                if (pingWorthyError) {
 350                    Conversation conversation = mXmppConnectionService.find(account, from);
 351                    if (conversation != null && conversation.getMode() == Conversational.MODE_MULTI) {
 352                        if (conversation.getMucOptions().online()) {
 353                            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received ping worthy error for seemingly online muc at " + from);
 354                            mXmppConnectionService.mucSelfPingAndRejoin(conversation);
 355                        }
 356                    }
 357                }
 358            }
 359            return true;
 360        }
 361        return false;
 362    }
 363
 364    @Override
 365    public void onMessagePacketReceived(Account account, MessagePacket original) {
 366        if (handleErrorMessage(account, original)) {
 367            return;
 368        }
 369        final MessagePacket packet;
 370        Long timestamp = null;
 371        boolean isCarbon = false;
 372        String serverMsgId = null;
 373        final Element fin = original.findChild("fin", MessageArchiveService.Version.MAM_0.namespace);
 374        if (fin != null) {
 375            mXmppConnectionService.getMessageArchiveService().processFinLegacy(fin, original.getFrom());
 376            return;
 377        }
 378        final Element result = MessageArchiveService.Version.findResult(original);
 379        final String queryId = result == null ? null : result.getAttribute("queryid");
 380        final MessageArchiveService.Query query = queryId == null ? null : mXmppConnectionService.getMessageArchiveService().findQuery(queryId);
 381        final boolean offlineMessagesRetrieved = account.getXmppConnection().isOfflineMessagesRetrieved();
 382        if (query != null && query.validFrom(original.getFrom())) {
 383            final Pair<MessagePacket, Long> f = original.getForwardedMessagePacket("result", query.version.namespace);
 384            if (f == null) {
 385                return;
 386            }
 387            timestamp = f.second;
 388            packet = f.first;
 389            serverMsgId = result.getAttribute("id");
 390            query.incrementMessageCount();
 391            if (handleErrorMessage(account, packet)) {
 392                return;
 393            }
 394        } else if (query != null) {
 395            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received mam result with invalid from (" + original.getFrom() + ") or queryId (" + queryId + ")");
 396            return;
 397        } else if (original.fromServer(account)) {
 398            Pair<MessagePacket, Long> f;
 399            f = original.getForwardedMessagePacket("received", Namespace.CARBONS);
 400            f = f == null ? original.getForwardedMessagePacket("sent", Namespace.CARBONS) : f;
 401            packet = f != null ? f.first : original;
 402            if (handleErrorMessage(account, packet)) {
 403                return;
 404            }
 405            timestamp = f != null ? f.second : null;
 406            isCarbon = f != null;
 407        } else {
 408            packet = original;
 409        }
 410
 411        if (timestamp == null) {
 412            timestamp = AbstractParser.parseTimestamp(original, AbstractParser.parseTimestamp(packet));
 413        }
 414        final LocalizedContent body = packet.getBody();
 415        final Element mucUserElement = packet.findChild("x", Namespace.MUC_USER);
 416        final String pgpEncrypted = packet.findChildContent("x", "jabber:x:encrypted");
 417        final Element replaceElement = packet.findChild("replace", "urn:xmpp:message-correct:0");
 418        final Element oob = packet.findChild("x", Namespace.OOB);
 419        final String oobUrl = oob != null ? oob.findChildContent("url") : null;
 420        final String replacementId = replaceElement == null ? null : replaceElement.getAttribute("id");
 421        final Element axolotlEncrypted = packet.findChildEnsureSingle(XmppAxolotlMessage.CONTAINERTAG, AxolotlService.PEP_PREFIX);
 422        int status;
 423        final Jid counterpart;
 424        final Jid to = packet.getTo();
 425        final Jid from = packet.getFrom();
 426        final Element originId = packet.findChild("origin-id", Namespace.STANZA_IDS);
 427        final String remoteMsgId;
 428        if (originId != null && originId.getAttribute("id") != null) {
 429            remoteMsgId = originId.getAttribute("id");
 430        } else {
 431            remoteMsgId = packet.getId();
 432        }
 433        boolean notify = false;
 434
 435        if (from == null || !InvalidJid.isValid(from) || !InvalidJid.isValid(to)) {
 436            Log.e(Config.LOGTAG, "encountered invalid message from='" + from + "' to='" + to + "'");
 437            return;
 438        }
 439
 440        boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
 441        if (query != null && !query.muc() && isTypeGroupChat) {
 442            Log.e(Config.LOGTAG, account.getJid().asBareJid() + ": received groupchat (" + from + ") message on regular MAM request. skipping");
 443            return;
 444        }
 445        boolean isMucStatusMessage = InvalidJid.hasValidFrom(packet) && from.isBareJid() && mucUserElement != null && mucUserElement.hasChild("status");
 446        boolean selfAddressed;
 447        if (packet.fromAccount(account)) {
 448            status = Message.STATUS_SEND;
 449            selfAddressed = to == null || account.getJid().asBareJid().equals(to.asBareJid());
 450            if (selfAddressed) {
 451                counterpart = from;
 452            } else {
 453                counterpart = to != null ? to : account.getJid();
 454            }
 455        } else {
 456            status = Message.STATUS_RECEIVED;
 457            counterpart = from;
 458            selfAddressed = false;
 459        }
 460
 461        final Invite invite = extractInvite(packet);
 462        if (invite != null) {
 463            if (invite.jid.asBareJid().equals(account.getJid().asBareJid())) {
 464                Log.d(Config.LOGTAG,account.getJid().asBareJid()+": ignore invite to "+invite.jid+" because it matches account");
 465            } else if (isTypeGroupChat) {
 466                Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": ignoring invite to " + invite.jid + " because it was received as group chat");
 467            } else if (invite.direct && (mucUserElement != null || invite.inviter == null || mXmppConnectionService.isMuc(account, invite.inviter))) {
 468                Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": ignoring direct invite to " + invite.jid + " because it was received in MUC");
 469            } else {
 470                invite.execute(account);
 471                return;
 472            }
 473        }
 474
 475        if ((body != null || pgpEncrypted != null || (axolotlEncrypted != null && axolotlEncrypted.hasChild("payload")) || oobUrl != null) && !isMucStatusMessage) {
 476            final boolean conversationIsProbablyMuc = isTypeGroupChat || mucUserElement != null || account.getXmppConnection().getMucServersWithholdAccount().contains(counterpart.getDomain().toEscapedString());
 477            final Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.asBareJid(), conversationIsProbablyMuc, false, query, false);
 478            final boolean conversationMultiMode = conversation.getMode() == Conversation.MODE_MULTI;
 479
 480            if (serverMsgId == null) {
 481                serverMsgId = extractStanzaId(packet, isTypeGroupChat, conversation);
 482            }
 483
 484
 485            if (selfAddressed) {
 486                if (mXmppConnectionService.markMessage(conversation, remoteMsgId, Message.STATUS_SEND_RECEIVED, serverMsgId)) {
 487                    return;
 488                }
 489                status = Message.STATUS_RECEIVED;
 490                if (remoteMsgId != null && conversation.findMessageWithRemoteId(remoteMsgId, counterpart) != null) {
 491                    return;
 492                }
 493            }
 494
 495            if (isTypeGroupChat) {
 496                if (conversation.getMucOptions().isSelf(counterpart)) {
 497                    status = Message.STATUS_SEND_RECEIVED;
 498                    isCarbon = true; //not really carbon but received from another resource
 499                    if (mXmppConnectionService.markMessage(conversation, remoteMsgId, status, serverMsgId, body)) {
 500                        return;
 501                    } else if (remoteMsgId == null || Config.IGNORE_ID_REWRITE_IN_MUC) {
 502                        if (body != null) {
 503                            Message message = conversation.findSentMessageWithBody(body.content);
 504                            if (message != null) {
 505                                mXmppConnectionService.markMessage(message, status);
 506                                return;
 507                            }
 508                        }
 509                    }
 510                } else {
 511                    status = Message.STATUS_RECEIVED;
 512                }
 513            }
 514            final Message message;
 515            if (pgpEncrypted != null && Config.supportOpenPgp()) {
 516                message = new Message(conversation, pgpEncrypted, Message.ENCRYPTION_PGP, status);
 517            } else if (axolotlEncrypted != null && Config.supportOmemo()) {
 518                Jid origin;
 519                Set<Jid> fallbacksBySourceId = Collections.emptySet();
 520                if (conversationMultiMode) {
 521                    final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
 522                    origin = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
 523                    if (origin == null) {
 524                        try {
 525                            fallbacksBySourceId = account.getAxolotlService().findCounterpartsBySourceId(XmppAxolotlMessage.parseSourceId(axolotlEncrypted));
 526                        } catch (IllegalArgumentException e) {
 527                            //ignoring
 528                        }
 529                    }
 530                    if (origin == null && fallbacksBySourceId.size() == 0) {
 531                        Log.d(Config.LOGTAG, "axolotl message in anonymous conference received and no possible fallbacks");
 532                        return;
 533                    }
 534                } else {
 535                    fallbacksBySourceId = Collections.emptySet();
 536                    origin = from;
 537                }
 538
 539                final boolean liveMessage = query == null && !isTypeGroupChat && mucUserElement == null;
 540                final boolean checkedForDuplicates = liveMessage || (serverMsgId != null && remoteMsgId != null && !conversation.possibleDuplicate(serverMsgId, remoteMsgId));
 541
 542                if (origin != null) {
 543                    message = parseAxolotlChat(axolotlEncrypted, origin, conversation, status, checkedForDuplicates, query != null);
 544                } else {
 545                    Message trial = null;
 546                    for (Jid fallback : fallbacksBySourceId) {
 547                        trial = parseAxolotlChat(axolotlEncrypted, fallback, conversation, status, checkedForDuplicates && fallbacksBySourceId.size() == 1, query != null);
 548                        if (trial != null) {
 549                            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": decoded muc message using fallback");
 550                            origin = fallback;
 551                            break;
 552                        }
 553                    }
 554                    message = trial;
 555                }
 556                if (message == null) {
 557                    if (query == null && extractChatState(mXmppConnectionService.find(account, counterpart.asBareJid()), isTypeGroupChat, packet)) {
 558                        mXmppConnectionService.updateConversationUi();
 559                    }
 560                    if (query != null && status == Message.STATUS_SEND && remoteMsgId != null) {
 561                        Message previouslySent = conversation.findSentMessageWithUuid(remoteMsgId);
 562                        if (previouslySent != null && previouslySent.getServerMsgId() == null && serverMsgId != null) {
 563                            previouslySent.setServerMsgId(serverMsgId);
 564                            mXmppConnectionService.databaseBackend.updateMessage(previouslySent, false);
 565                            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": encountered previously sent OMEMO message without serverId. updating...");
 566                        }
 567                    }
 568                    return;
 569                }
 570                if (conversationMultiMode) {
 571                    message.setTrueCounterpart(origin);
 572                }
 573            } else if (body == null && oobUrl != null) {
 574                message = new Message(conversation, oobUrl, Message.ENCRYPTION_NONE, status);
 575                message.setOob(true);
 576                if (CryptoHelper.isPgpEncryptedUrl(oobUrl)) {
 577                    message.setEncryption(Message.ENCRYPTION_DECRYPTED);
 578                }
 579            } else {
 580                message = new Message(conversation, body.content, Message.ENCRYPTION_NONE, status);
 581                if (body.count > 1) {
 582                    message.setBodyLanguage(body.language);
 583                }
 584            }
 585
 586            message.setCounterpart(counterpart);
 587            message.setRemoteMsgId(remoteMsgId);
 588            message.setServerMsgId(serverMsgId);
 589            message.setCarbon(isCarbon);
 590            message.setTime(timestamp);
 591            if (body != null && body.content != null && body.content.equals(oobUrl)) {
 592                message.setOob(true);
 593                if (CryptoHelper.isPgpEncryptedUrl(oobUrl)) {
 594                    message.setEncryption(Message.ENCRYPTION_DECRYPTED);
 595                }
 596            }
 597            message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
 598            if (conversationMultiMode) {
 599                message.setMucUser(conversation.getMucOptions().findUserByFullJid(counterpart));
 600                final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
 601                Jid trueCounterpart;
 602                if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
 603                    trueCounterpart = message.getTrueCounterpart();
 604                } else if (query != null && query.safeToExtractTrueCounterpart()) {
 605                    trueCounterpart = getTrueCounterpart(mucUserElement, fallback);
 606                } else {
 607                    trueCounterpart = fallback;
 608                }
 609                if (trueCounterpart != null && isTypeGroupChat) {
 610                    if (trueCounterpart.asBareJid().equals(account.getJid().asBareJid())) {
 611                        status = isTypeGroupChat ? Message.STATUS_SEND_RECEIVED : Message.STATUS_SEND;
 612                    } else {
 613                        status = Message.STATUS_RECEIVED;
 614                        message.setCarbon(false);
 615                    }
 616                }
 617                message.setStatus(status);
 618                message.setTrueCounterpart(trueCounterpart);
 619                if (!isTypeGroupChat) {
 620                    message.setType(Message.TYPE_PRIVATE);
 621                }
 622            } else {
 623                updateLastseen(account, from);
 624            }
 625
 626            if (replacementId != null && mXmppConnectionService.allowMessageCorrection()) {
 627                final Message replacedMessage = conversation.findMessageWithRemoteIdAndCounterpart(replacementId,
 628                        counterpart,
 629                        message.getStatus() == Message.STATUS_RECEIVED,
 630                        message.isCarbon());
 631                if (replacedMessage != null) {
 632                    final boolean fingerprintsMatch = replacedMessage.getFingerprint() == null
 633                            || replacedMessage.getFingerprint().equals(message.getFingerprint());
 634                    final boolean trueCountersMatch = replacedMessage.getTrueCounterpart() != null
 635                            && message.getTrueCounterpart() != null
 636                            && replacedMessage.getTrueCounterpart().asBareJid().equals(message.getTrueCounterpart().asBareJid());
 637                    final boolean mucUserMatches = query == null && replacedMessage.sameMucUser(message); //can not be checked when using mam
 638                    final boolean duplicate = conversation.hasDuplicateMessage(message);
 639                    if (fingerprintsMatch && (trueCountersMatch || !conversationMultiMode || mucUserMatches) && !duplicate) {
 640                        Log.d(Config.LOGTAG, "replaced message '" + replacedMessage.getBody() + "' with '" + message.getBody() + "'");
 641                        synchronized (replacedMessage) {
 642                            final String uuid = replacedMessage.getUuid();
 643                            replacedMessage.setUuid(UUID.randomUUID().toString());
 644                            replacedMessage.setBody(message.getBody());
 645                            replacedMessage.putEdited(replacedMessage.getRemoteMsgId(), replacedMessage.getServerMsgId());
 646                            replacedMessage.setRemoteMsgId(remoteMsgId);
 647                            if (replacedMessage.getServerMsgId() == null || message.getServerMsgId() != null) {
 648                                replacedMessage.setServerMsgId(message.getServerMsgId());
 649                            }
 650                            replacedMessage.setEncryption(message.getEncryption());
 651                            if (replacedMessage.getStatus() == Message.STATUS_RECEIVED) {
 652                                replacedMessage.markUnread();
 653                            }
 654                            extractChatState(mXmppConnectionService.find(account, counterpart.asBareJid()), isTypeGroupChat, packet);
 655                            mXmppConnectionService.updateMessage(replacedMessage, uuid);
 656                            if (mXmppConnectionService.confirmMessages()
 657                                    && replacedMessage.getStatus() == Message.STATUS_RECEIVED
 658                                    && (replacedMessage.trusted() || replacedMessage.isPrivateMessage()) //TODO do we really want to send receipts for all PMs?
 659                                    && remoteMsgId != null
 660                                    && !selfAddressed
 661                                    && !isTypeGroupChat) {
 662                                processMessageReceipts(account, packet, remoteMsgId, query);
 663                            }
 664                            if (replacedMessage.getEncryption() == Message.ENCRYPTION_PGP) {
 665                                conversation.getAccount().getPgpDecryptionService().discard(replacedMessage);
 666                                conversation.getAccount().getPgpDecryptionService().decrypt(replacedMessage, false);
 667                            }
 668                        }
 669                        mXmppConnectionService.getNotificationService().updateNotification();
 670                        return;
 671                    } else {
 672                        Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received message correction but verification didn't check out");
 673                    }
 674                }
 675            }
 676
 677            long deletionDate = mXmppConnectionService.getAutomaticMessageDeletionDate();
 678            if (deletionDate != 0 && message.getTimeSent() < deletionDate) {
 679                Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": skipping message from " + message.getCounterpart().toString() + " because it was sent prior to our deletion date");
 680                return;
 681            }
 682
 683            boolean checkForDuplicates = (isTypeGroupChat && packet.hasChild("delay", "urn:xmpp:delay"))
 684                    || message.isPrivateMessage()
 685                    || message.getServerMsgId() != null
 686                    || (query == null && mXmppConnectionService.getMessageArchiveService().isCatchupInProgress(conversation));
 687            if (checkForDuplicates) {
 688                final Message duplicate = conversation.findDuplicateMessage(message);
 689                if (duplicate != null) {
 690                    final boolean serverMsgIdUpdated;
 691                    if (duplicate.getStatus() != Message.STATUS_RECEIVED
 692                            && duplicate.getUuid().equals(message.getRemoteMsgId())
 693                            && duplicate.getServerMsgId() == null
 694                            && message.getServerMsgId() != null) {
 695                        duplicate.setServerMsgId(message.getServerMsgId());
 696                        if (mXmppConnectionService.databaseBackend.updateMessage(duplicate, false)) {
 697                            serverMsgIdUpdated = true;
 698                        } else {
 699                            serverMsgIdUpdated = false;
 700                            Log.e(Config.LOGTAG, "failed to update message");
 701                        }
 702                    } else {
 703                        serverMsgIdUpdated = false;
 704                    }
 705                    Log.d(Config.LOGTAG, "skipping duplicate message with " + message.getCounterpart() + ". serverMsgIdUpdated=" + serverMsgIdUpdated);
 706                    return;
 707                }
 708            }
 709
 710            if (query != null && query.getPagingOrder() == MessageArchiveService.PagingOrder.REVERSE) {
 711                conversation.prepend(query.getActualInThisQuery(), message);
 712            } else {
 713                conversation.add(message);
 714            }
 715            if (query != null) {
 716                query.incrementActualMessageCount();
 717            }
 718
 719            if (query == null || query.isCatchup()) { //either no mam or catchup
 720                if (status == Message.STATUS_SEND || status == Message.STATUS_SEND_RECEIVED) {
 721                    mXmppConnectionService.markRead(conversation);
 722                    if (query == null) {
 723                        activateGracePeriod(account);
 724                    }
 725                } else {
 726                    message.markUnread();
 727                    notify = true;
 728                }
 729            }
 730
 731            if (message.getEncryption() == Message.ENCRYPTION_PGP) {
 732                notify = conversation.getAccount().getPgpDecryptionService().decrypt(message, notify);
 733            } else if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL_NOT_FOR_THIS_DEVICE || message.getEncryption() == Message.ENCRYPTION_AXOLOTL_FAILED) {
 734                notify = false;
 735            }
 736
 737            if (query == null) {
 738                extractChatState(mXmppConnectionService.find(account, counterpart.asBareJid()), isTypeGroupChat, packet);
 739                mXmppConnectionService.updateConversationUi();
 740            }
 741
 742            if (mXmppConnectionService.confirmMessages()
 743                    && message.getStatus() == Message.STATUS_RECEIVED
 744                    && (message.trusted() || message.isPrivateMessage())
 745                    && remoteMsgId != null
 746                    && !selfAddressed
 747                    && !isTypeGroupChat) {
 748                processMessageReceipts(account, packet, remoteMsgId, query);
 749            }
 750
 751            mXmppConnectionService.databaseBackend.createMessage(message);
 752            final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
 753            if (message.trusted() && message.treatAsDownloadable() && manager.getAutoAcceptFileSize() > 0) {
 754                manager.createNewDownloadConnection(message);
 755            } else if (notify) {
 756                if (query != null && query.isCatchup()) {
 757                    mXmppConnectionService.getNotificationService().pushFromBacklog(message);
 758                } else {
 759                    mXmppConnectionService.getNotificationService().push(message);
 760                }
 761            }
 762        } else if (!packet.hasChild("body")) { //no body
 763
 764            final Conversation conversation = mXmppConnectionService.find(account, from.asBareJid());
 765            if (axolotlEncrypted != null) {
 766                Jid origin;
 767                if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
 768                    final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
 769                    origin = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
 770                    if (origin == null) {
 771                        Log.d(Config.LOGTAG, "omemo key transport message in anonymous conference received");
 772                        return;
 773                    }
 774                } else if (isTypeGroupChat) {
 775                    return;
 776                } else {
 777                    origin = from;
 778                }
 779                try {
 780                    final XmppAxolotlMessage xmppAxolotlMessage = XmppAxolotlMessage.fromElement(axolotlEncrypted, origin.asBareJid());
 781                    account.getAxolotlService().processReceivingKeyTransportMessage(xmppAxolotlMessage, query != null);
 782                    Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": omemo key transport message received from " + origin);
 783                } catch (Exception e) {
 784                    Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": invalid omemo key transport message received " + e.getMessage());
 785                    return;
 786                }
 787            }
 788
 789            if (query == null && extractChatState(mXmppConnectionService.find(account, counterpart.asBareJid()), isTypeGroupChat, packet)) {
 790                mXmppConnectionService.updateConversationUi();
 791            }
 792
 793            if (isTypeGroupChat) {
 794                if (packet.hasChild("subject") && !packet.hasChild("thread")) { // We already know it has no body per above
 795                    if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
 796                        conversation.setHasMessagesLeftOnServer(conversation.countMessages() > 0);
 797                        final LocalizedContent subject = packet.findInternationalizedChildContentInDefaultNamespace("subject");
 798                        if (subject != null && conversation.getMucOptions().setSubject(subject.content)) {
 799                            mXmppConnectionService.updateConversation(conversation);
 800                        }
 801                        mXmppConnectionService.updateConversationUi();
 802                        return;
 803                    }
 804                }
 805            }
 806            if (conversation != null && mucUserElement != null && InvalidJid.hasValidFrom(packet) && from.isBareJid()) {
 807                for (Element child : mucUserElement.getChildren()) {
 808                    if ("status".equals(child.getName())) {
 809                        try {
 810                            int code = Integer.parseInt(child.getAttribute("code"));
 811                            if ((code >= 170 && code <= 174) || (code >= 102 && code <= 104)) {
 812                                mXmppConnectionService.fetchConferenceConfiguration(conversation);
 813                                break;
 814                            }
 815                        } catch (Exception e) {
 816                            //ignored
 817                        }
 818                    } else if ("item".equals(child.getName())) {
 819                        MucOptions.User user = AbstractParser.parseItem(conversation, child);
 820                        Log.d(Config.LOGTAG, account.getJid() + ": changing affiliation for "
 821                                + user.getRealJid() + " to " + user.getAffiliation() + " in "
 822                                + conversation.getJid().asBareJid());
 823                        if (!user.realJidMatchesAccount()) {
 824                            boolean isNew = conversation.getMucOptions().updateUser(user);
 825                            mXmppConnectionService.getAvatarService().clear(conversation);
 826                            mXmppConnectionService.updateMucRosterUi();
 827                            mXmppConnectionService.updateConversationUi();
 828                            Contact contact = user.getContact();
 829                            if (!user.getAffiliation().ranks(MucOptions.Affiliation.MEMBER)) {
 830                                Jid jid = user.getRealJid();
 831                                List<Jid> cryptoTargets = conversation.getAcceptedCryptoTargets();
 832                                if (cryptoTargets.remove(user.getRealJid())) {
 833                                    Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": removed " + jid + " from crypto targets of " + conversation.getName());
 834                                    conversation.setAcceptedCryptoTargets(cryptoTargets);
 835                                    mXmppConnectionService.updateConversation(conversation);
 836                                }
 837                            } else if (isNew
 838                                    && user.getRealJid() != null
 839                                    && conversation.getMucOptions().isPrivateAndNonAnonymous()
 840                                    && (contact == null || !contact.mutualPresenceSubscription())
 841                                    && account.getAxolotlService().hasEmptyDeviceList(user.getRealJid())) {
 842                                account.getAxolotlService().fetchDeviceIds(user.getRealJid());
 843                            }
 844                        }
 845                    }
 846                }
 847            }
 848            if (!isTypeGroupChat) {
 849                for (Element child : packet.getChildren()) {
 850                    if (Namespace.JINGLE_MESSAGE.equals(child.getNamespace()) && JINGLE_MESSAGE_ELEMENT_NAMES.contains(child.getName())) {
 851                        final String action = child.getName();
 852                        final String sessionId = child.getAttribute("id");
 853                        if (sessionId == null) {
 854                            break;
 855                        }
 856                        if (query == null && offlineMessagesRetrieved) {
 857                            if (serverMsgId == null) {
 858                                serverMsgId = extractStanzaId(account, packet);
 859                            }
 860                            mXmppConnectionService
 861                                    .getJingleConnectionManager()
 862                                    .deliverMessage(
 863                                            account,
 864                                            packet.getTo(),
 865                                            packet.getFrom(),
 866                                            child,
 867                                            remoteMsgId,
 868                                            serverMsgId,
 869                                            timestamp);
 870                            final Contact contact = account.getRoster().getContact(from);
 871                            if (mXmppConnectionService.confirmMessages()
 872                                    && !contact.isSelf()
 873                                    && remoteMsgId != null
 874                                    && contact.showInContactList()) {
 875                                processMessageReceipts(account, packet, remoteMsgId, null);
 876                            }
 877                        } else if ((query != null && query.isCatchup()) || !offlineMessagesRetrieved) {
 878                            if ("propose".equals(action)) {
 879                                final Element description = child.findChild("description");
 880                                final String namespace =
 881                                        description == null ? null : description.getNamespace();
 882                                if (Namespace.JINGLE_APPS_RTP.equals(namespace)) {
 883                                    final Conversation c =
 884                                            mXmppConnectionService.findOrCreateConversation(
 885                                                    account, counterpart.asBareJid(), false, false);
 886                                    final Message preExistingMessage =
 887                                            c.findRtpSession(sessionId, status);
 888                                    if (preExistingMessage != null) {
 889                                        preExistingMessage.setServerMsgId(serverMsgId);
 890                                        mXmppConnectionService.updateMessage(preExistingMessage);
 891                                        break;
 892                                    }
 893                                    final Message message =
 894                                            new Message(
 895                                                    c, status, Message.TYPE_RTP_SESSION, sessionId);
 896                                    message.setServerMsgId(serverMsgId);
 897                                    message.setTime(timestamp);
 898                                    message.setBody(new RtpSessionStatus(false, 0).toString());
 899                                    c.add(message);
 900                                    mXmppConnectionService.databaseBackend.createMessage(message);
 901                                }
 902                            } else if ("proceed".equals(action)) {
 903                                // status needs to be flipped to find the original propose
 904                                final Conversation c =
 905                                        mXmppConnectionService.findOrCreateConversation(
 906                                                account, counterpart.asBareJid(), false, false);
 907                                final int s =
 908                                        packet.fromAccount(account)
 909                                                ? Message.STATUS_RECEIVED
 910                                                : Message.STATUS_SEND;
 911                                final Message message = c.findRtpSession(sessionId, s);
 912                                if (message != null) {
 913                                    message.setBody(new RtpSessionStatus(true, 0).toString());
 914                                    if (serverMsgId != null) {
 915                                        message.setServerMsgId(serverMsgId);
 916                                    }
 917                                    message.setTime(timestamp);
 918                                    mXmppConnectionService.updateMessage(message, true);
 919                                } else {
 920                                    Log.d(
 921                                            Config.LOGTAG,
 922                                            "unable to find original rtp session message for received propose");
 923                                }
 924
 925                            } else if ("finish".equals(action)) {
 926                                Log.d(
 927                                        Config.LOGTAG,
 928                                        "received JMI 'finish' during MAM catch-up. Can be used to update success/failure and duration");
 929                            }
 930                        } else {
 931                            //MAM reloads (non catchups
 932                            if ("propose".equals(action)) {
 933                                final Element description = child.findChild("description");
 934                                final String namespace = description == null ? null : description.getNamespace();
 935                                if (Namespace.JINGLE_APPS_RTP.equals(namespace)) {
 936                                    final Conversation c = mXmppConnectionService.findOrCreateConversation(account, counterpart.asBareJid(), false, false);
 937                                    final Message preExistingMessage = c.findRtpSession(sessionId, status);
 938                                    if (preExistingMessage != null) {
 939                                        preExistingMessage.setServerMsgId(serverMsgId);
 940                                        mXmppConnectionService.updateMessage(preExistingMessage);
 941                                        break;
 942                                    }
 943                                    final Message message = new Message(
 944                                            c,
 945                                            status,
 946                                            Message.TYPE_RTP_SESSION,
 947                                            sessionId
 948                                    );
 949                                    message.setServerMsgId(serverMsgId);
 950                                    message.setTime(timestamp);
 951                                    message.setBody(new RtpSessionStatus(true, 0).toString());
 952                                    if (query.getPagingOrder() == MessageArchiveService.PagingOrder.REVERSE) {
 953                                        c.prepend(query.getActualInThisQuery(), message);
 954                                    } else {
 955                                        c.add(message);
 956                                    }
 957                                    query.incrementActualMessageCount();
 958                                    mXmppConnectionService.databaseBackend.createMessage(message);
 959                                }
 960                            }
 961                        }
 962                        break;
 963                    }
 964                }
 965            }
 966        }
 967
 968        Element received = packet.findChild("received", "urn:xmpp:chat-markers:0");
 969        if (received == null) {
 970            received = packet.findChild("received", "urn:xmpp:receipts");
 971        }
 972        if (received != null) {
 973            String id = received.getAttribute("id");
 974            if (packet.fromAccount(account)) {
 975                if (query != null && id != null && packet.getTo() != null) {
 976                    query.removePendingReceiptRequest(new ReceiptRequest(packet.getTo(), id));
 977                }
 978            } else if (id != null) {
 979                if (id.startsWith(JingleRtpConnection.JINGLE_MESSAGE_PROPOSE_ID_PREFIX)) {
 980                    final String sessionId = id.substring(JingleRtpConnection.JINGLE_MESSAGE_PROPOSE_ID_PREFIX.length());
 981                    mXmppConnectionService.getJingleConnectionManager()
 982                            .updateProposedSessionDiscovered(account, from, sessionId, JingleConnectionManager.DeviceDiscoveryState.DISCOVERED);
 983                } else {
 984                    mXmppConnectionService.markMessage(account, from.asBareJid(), id, Message.STATUS_SEND_RECEIVED);
 985                }
 986            }
 987        }
 988        Element displayed = packet.findChild("displayed", "urn:xmpp:chat-markers:0");
 989        if (displayed != null) {
 990            final String id = displayed.getAttribute("id");
 991            final Jid sender = InvalidJid.getNullForInvalid(displayed.getAttributeAsJid("sender"));
 992            if (packet.fromAccount(account) && !selfAddressed) {
 993                dismissNotification(account, counterpart, query, id);
 994                if (query == null) {
 995                    activateGracePeriod(account);
 996                }
 997            } else if (isTypeGroupChat) {
 998                final Conversation conversation = mXmppConnectionService.find(account, counterpart.asBareJid());
 999                final Message message;
1000                if (conversation != null && id != null) {
1001                    if (sender != null) {
1002                        message = conversation.findMessageWithRemoteId(id, sender);
1003                    } else {
1004                        message = conversation.findMessageWithServerMsgId(id);
1005                    }
1006                } else {
1007                    message = null;
1008                }
1009                if (message != null) {
1010                    final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
1011                    final Jid trueJid = getTrueCounterpart((query != null && query.safeToExtractTrueCounterpart()) ? mucUserElement : null, fallback);
1012                    final boolean trueJidMatchesAccount = account.getJid().asBareJid().equals(trueJid == null ? null : trueJid.asBareJid());
1013                    if (trueJidMatchesAccount || conversation.getMucOptions().isSelf(counterpart)) {
1014                        if (!message.isRead() && (query == null || query.isCatchup())) { //checking if message is unread fixes race conditions with reflections
1015                            mXmppConnectionService.markRead(conversation);
1016                        }
1017                    } else if (!counterpart.isBareJid() && trueJid != null) {
1018                        final ReadByMarker readByMarker = ReadByMarker.from(counterpart, trueJid);
1019                        if (message.addReadByMarker(readByMarker)) {
1020                            mXmppConnectionService.updateMessage(message, false);
1021                        }
1022                    }
1023                }
1024            } else {
1025                final Message displayedMessage = mXmppConnectionService.markMessage(account, from.asBareJid(), id, Message.STATUS_SEND_DISPLAYED);
1026                Message message = displayedMessage == null ? null : displayedMessage.prev();
1027                while (message != null
1028                        && message.getStatus() == Message.STATUS_SEND_RECEIVED
1029                        && message.getTimeSent() < displayedMessage.getTimeSent()) {
1030                    mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
1031                    message = message.prev();
1032                }
1033                if (displayedMessage != null && selfAddressed) {
1034                    dismissNotification(account, counterpart, query, id);
1035                }
1036            }
1037        }
1038
1039        final Element event = original.findChild("event", "http://jabber.org/protocol/pubsub#event");
1040        if (event != null && InvalidJid.hasValidFrom(original) && original.getFrom().isBareJid()) {
1041            if (event.hasChild("items")) {
1042                parseEvent(event, original.getFrom(), account);
1043            } else if (event.hasChild("delete")) {
1044                parseDeleteEvent(event, original.getFrom(), account);
1045            } else if (event.hasChild("purge")) {
1046                parsePurgeEvent(event, original.getFrom(), account);
1047            }
1048        }
1049
1050        final String nick = packet.findChildContent("nick", Namespace.NICK);
1051        if (nick != null && InvalidJid.hasValidFrom(original)) {
1052            if (mXmppConnectionService.isMuc(account, from)) {
1053                return;
1054            }
1055            final Contact contact = account.getRoster().getContact(from);
1056            if (contact.setPresenceName(nick)) {
1057                mXmppConnectionService.syncRoster(account);
1058                mXmppConnectionService.getAvatarService().clear(contact);
1059            }
1060        }
1061    }
1062
1063    private void dismissNotification(Account account, Jid counterpart, MessageArchiveService.Query query, final String id) {
1064        final Conversation conversation = mXmppConnectionService.find(account, counterpart.asBareJid());
1065        if (conversation != null && (query == null || query.isCatchup())) {
1066            final String displayableId = conversation.findMostRecentRemoteDisplayableId();
1067            if (displayableId != null && displayableId.equals(id)) {
1068                mXmppConnectionService.markRead(conversation);
1069            } else {
1070                Log.w(Config.LOGTAG, account.getJid().asBareJid() + ": received dismissing display marker that did not match our last id in that conversation");
1071            }
1072        }
1073    }
1074
1075    private void processMessageReceipts(final Account account, final MessagePacket packet, final String remoteMsgId, MessageArchiveService.Query query) {
1076        final boolean markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
1077        final boolean request = packet.hasChild("request", "urn:xmpp:receipts");
1078        if (query == null) {
1079            final ArrayList<String> receiptsNamespaces = new ArrayList<>();
1080            if (markable) {
1081                receiptsNamespaces.add("urn:xmpp:chat-markers:0");
1082            }
1083            if (request) {
1084                receiptsNamespaces.add("urn:xmpp:receipts");
1085            }
1086            if (receiptsNamespaces.size() > 0) {
1087                final MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
1088                        packet.getFrom(),
1089                        remoteMsgId,
1090                        receiptsNamespaces,
1091                        packet.getType());
1092                mXmppConnectionService.sendMessagePacket(account, receipt);
1093            }
1094        } else if (query.isCatchup()) {
1095            if (request) {
1096                query.addPendingReceiptRequest(new ReceiptRequest(packet.getFrom(), remoteMsgId));
1097            }
1098        }
1099    }
1100
1101    private void activateGracePeriod(Account account) {
1102        long duration = mXmppConnectionService.getLongPreference("grace_period_length", R.integer.grace_period) * 1000;
1103        Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": activating grace period till " + TIME_FORMAT.format(new Date(System.currentTimeMillis() + duration)));
1104        account.activateGracePeriod(duration);
1105    }
1106
1107    private class Invite {
1108        final Jid jid;
1109        final String password;
1110        final boolean direct;
1111        final Jid inviter;
1112
1113        Invite(Jid jid, String password, boolean direct, Jid inviter) {
1114            this.jid = jid;
1115            this.password = password;
1116            this.direct = direct;
1117            this.inviter = inviter;
1118        }
1119
1120        public boolean execute(final Account account) {
1121            if (this.jid == null) {
1122                return false;
1123            }
1124            final Contact contact = this.inviter != null ? account.getRoster().getContact(this.inviter) : null;
1125            if (contact != null && contact.isBlocked()) {
1126                Log.d(Config.LOGTAG,account.getJid().asBareJid()+": ignore invite from "+contact.getJid()+" because contact is blocked");
1127                return false;
1128            }
1129            final Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, jid, true, false);
1130            if (conversation.getMucOptions().online()) {
1131                Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received invite to " + jid + " but muc is considered to be online");
1132                mXmppConnectionService.mucSelfPingAndRejoin(conversation);
1133            } else {
1134                conversation.getMucOptions().setPassword(password);
1135                mXmppConnectionService.databaseBackend.updateConversation(conversation);
1136                mXmppConnectionService.joinMuc(conversation, contact != null && contact.showInContactList());
1137                mXmppConnectionService.updateConversationUi();
1138            }
1139            return true;
1140        }
1141    }
1142}