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