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