1package eu.siacs.conversations.parser;
  2
  3import android.text.Html;
  4import android.util.Log;
  5import android.util.Pair;
  6
  7import net.java.otr4j.session.Session;
  8import net.java.otr4j.session.SessionStatus;
  9
 10import java.text.SimpleDateFormat;
 11import java.util.ArrayList;
 12import java.util.Arrays;
 13import java.util.Date;
 14import java.util.List;
 15import java.util.Set;
 16import java.util.UUID;
 17
 18import eu.siacs.conversations.Config;
 19import eu.siacs.conversations.crypto.OtrService;
 20import eu.siacs.conversations.crypto.axolotl.AxolotlService;
 21import eu.siacs.conversations.crypto.axolotl.XmppAxolotlMessage;
 22import eu.siacs.conversations.entities.Account;
 23import eu.siacs.conversations.entities.Bookmark;
 24import eu.siacs.conversations.entities.Contact;
 25import eu.siacs.conversations.entities.Conversation;
 26import eu.siacs.conversations.entities.Message;
 27import eu.siacs.conversations.entities.MucOptions;
 28import eu.siacs.conversations.entities.Presence;
 29import eu.siacs.conversations.entities.ServiceDiscoveryResult;
 30import eu.siacs.conversations.http.HttpConnectionManager;
 31import eu.siacs.conversations.services.MessageArchiveService;
 32import eu.siacs.conversations.services.XmppConnectionService;
 33import eu.siacs.conversations.utils.CryptoHelper;
 34import eu.siacs.conversations.utils.Xmlns;
 35import eu.siacs.conversations.xml.Element;
 36import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
 37import eu.siacs.conversations.xmpp.chatstate.ChatState;
 38import eu.siacs.conversations.xmpp.jid.Jid;
 39import eu.siacs.conversations.xmpp.pep.Avatar;
 40import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
 41
 42public class MessageParser extends AbstractParser implements OnMessagePacketReceived {
 43
 44	private static final List<String> CLIENTS_SENDING_HTML_IN_OTR = Arrays.asList("Pidgin","Adium","Trillian");
 45
 46	public MessageParser(XmppConnectionService service) {
 47		super(service);
 48	}
 49
 50	private boolean extractChatState(Conversation conversation, final MessagePacket packet) {
 51		ChatState state = ChatState.parse(packet);
 52		if (state != null && conversation != null) {
 53			final Account account = conversation.getAccount();
 54			Jid from = packet.getFrom();
 55			if (from.toBareJid().equals(account.getJid().toBareJid())) {
 56				conversation.setOutgoingChatState(state);
 57				if (state == ChatState.ACTIVE || state == ChatState.COMPOSING) {
 58					mXmppConnectionService.markRead(conversation);
 59					activateGracePeriod(account);
 60				}
 61				return false;
 62			} else {
 63				return conversation.setIncomingChatState(state);
 64			}
 65		}
 66		return false;
 67	}
 68
 69	private Message parseOtrChat(String body, Jid from, String id, Conversation conversation) {
 70		String presence;
 71		if (from.isBareJid()) {
 72			presence = "";
 73		} else {
 74			presence = from.getResourcepart();
 75		}
 76		if (body.matches("^\\?OTRv\\d{1,2}\\?.*")) {
 77			conversation.endOtrIfNeeded();
 78		}
 79		if (!conversation.hasValidOtrSession()) {
 80			conversation.startOtrSession(presence,false);
 81		} else {
 82			String foreignPresence = conversation.getOtrSession().getSessionID().getUserID();
 83			if (!foreignPresence.equals(presence)) {
 84				conversation.endOtrIfNeeded();
 85				conversation.startOtrSession(presence, false);
 86			}
 87		}
 88		try {
 89			conversation.setLastReceivedOtrMessageId(id);
 90			Session otrSession = conversation.getOtrSession();
 91			body = otrSession.transformReceiving(body);
 92			SessionStatus status = otrSession.getSessionStatus();
 93			if (body == null && status == SessionStatus.ENCRYPTED) {
 94				mXmppConnectionService.onOtrSessionEstablished(conversation);
 95				return null;
 96			} else if (body == null && status == SessionStatus.FINISHED) {
 97				conversation.resetOtrSession();
 98				mXmppConnectionService.updateConversationUi();
 99				return null;
100			} else if (body == null || (body.isEmpty())) {
101				return null;
102			}
103			if (body.startsWith(CryptoHelper.FILETRANSFER)) {
104				String key = body.substring(CryptoHelper.FILETRANSFER.length());
105				conversation.setSymmetricKey(CryptoHelper.hexToBytes(key));
106				return null;
107			}
108			if (clientMightSendHtml(conversation.getAccount(), from)) {
109				Log.d(Config.LOGTAG,conversation.getAccount().getJid().toBareJid()+": received OTR message from bad behaving client. escaping HTML…");
110				body = Html.fromHtml(body).toString();
111			}
112
113			final OtrService otrService = conversation.getAccount().getOtrService();
114			Message finishedMessage = new Message(conversation, body, Message.ENCRYPTION_OTR, Message.STATUS_RECEIVED);
115			finishedMessage.setFingerprint(otrService.getFingerprint(otrSession.getRemotePublicKey()));
116			conversation.setLastReceivedOtrMessageId(null);
117
118			return finishedMessage;
119		} catch (Exception e) {
120			conversation.resetOtrSession();
121			return null;
122		}
123	}
124
125	private static boolean clientMightSendHtml(Account account, Jid from) {
126		String resource = from.getResourcepart();
127		if (resource == null) {
128			return false;
129		}
130		Presence presence = account.getRoster().getContact(from).getPresences().getPresences().get(resource);
131		ServiceDiscoveryResult disco = presence == null ? null : presence.getServiceDiscoveryResult();
132		if (disco == null) {
133			return false;
134		}
135		return hasIdentityKnowForSendingHtml(disco.getIdentities());
136	}
137
138	private static boolean hasIdentityKnowForSendingHtml(List<ServiceDiscoveryResult.Identity> identities) {
139		for(ServiceDiscoveryResult.Identity identity : identities) {
140			if (identity.getName() != null) {
141				if (CLIENTS_SENDING_HTML_IN_OTR.contains(identity.getName())) {
142					return true;
143				}
144			}
145		}
146		return false;
147	}
148
149	private Message parseAxolotlChat(Element axolotlMessage, Jid from,  Conversation conversation, int status) {
150		AxolotlService service = conversation.getAccount().getAxolotlService();
151		XmppAxolotlMessage xmppAxolotlMessage;
152		try {
153			xmppAxolotlMessage = XmppAxolotlMessage.fromElement(axolotlMessage, from.toBareJid());
154		} catch (Exception e) {
155			Log.d(Config.LOGTAG,conversation.getAccount().getJid().toBareJid()+": invalid omemo message received "+e.getMessage());
156			return null;
157		}
158		XmppAxolotlMessage.XmppAxolotlPlaintextMessage plaintextMessage = service.processReceivingPayloadMessage(xmppAxolotlMessage);
159		if(plaintextMessage != null) {
160			Message finishedMessage = new Message(conversation, plaintextMessage.getPlaintext(), Message.ENCRYPTION_AXOLOTL, status);
161			finishedMessage.setFingerprint(plaintextMessage.getFingerprint());
162			Log.d(Config.LOGTAG, AxolotlService.getLogprefix(finishedMessage.getConversation().getAccount())+" Received Message with session fingerprint: "+plaintextMessage.getFingerprint());
163			return finishedMessage;
164		} else {
165			return null;
166		}
167	}
168
169	private class Invite {
170		final Jid jid;
171		final String password;
172		final Contact inviter;
173		Invite(Jid jid, String password, Contact inviter) {
174			this.jid = jid;
175			this.password = password;
176			this.inviter = inviter;
177		}
178
179		public boolean execute(Account account) {
180			if (jid != null) {
181				Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, jid, true);
182				if (!conversation.getMucOptions().online()) {
183					conversation.getMucOptions().setPassword(password);
184					mXmppConnectionService.databaseBackend.updateConversation(conversation);
185					mXmppConnectionService.joinMuc(conversation, inviter != null && inviter.mutualPresenceSubscription());
186					mXmppConnectionService.updateConversationUi();
187				}
188				return true;
189			}
190			return false;
191		}
192	}
193
194	private Invite extractInvite(Account account, Element message) {
195		Element x = message.findChild("x", "http://jabber.org/protocol/muc#user");
196		if (x != null) {
197			Element invite = x.findChild("invite");
198			if (invite != null) {
199				Element pw = x.findChild("password");
200				Jid from = invite.getAttributeAsJid("from");
201				Contact contact = from == null ? null : account.getRoster().getContact(from);
202				return new Invite(message.getAttributeAsJid("from"), pw != null ? pw.getContent(): null, contact);
203			}
204		} else {
205			x = message.findChild("x","jabber:x:conference");
206			if (x != null) {
207				Jid from = message.getAttributeAsJid("from");
208				Contact contact = from == null ? null : account.getRoster().getContact(from);
209				return new Invite(x.getAttributeAsJid("jid"),x.getAttribute("password"),contact);
210			}
211		}
212		return null;
213	}
214
215	private static String extractStanzaId(Element packet, Jid by) {
216		for(Element child : packet.getChildren()) {
217			if (child.getName().equals("stanza-id")
218					&& Xmlns.STANZA_IDS.equals(child.getNamespace())
219					&& by.equals(child.getAttributeAsJid("by"))) {
220				return child.getAttribute("id");
221			}
222		}
223		return null;
224	}
225
226	private void parseEvent(final Element event, final Jid from, final Account account) {
227		Element items = event.findChild("items");
228		String node = items == null ? null : items.getAttribute("node");
229		if ("urn:xmpp:avatar:metadata".equals(node)) {
230			Avatar avatar = Avatar.parseMetadata(items);
231			if (avatar != null) {
232				avatar.owner = from.toBareJid();
233				if (mXmppConnectionService.getFileBackend().isAvatarCached(avatar)) {
234					if (account.getJid().toBareJid().equals(from)) {
235						if (account.setAvatar(avatar.getFilename())) {
236							mXmppConnectionService.databaseBackend.updateAccount(account);
237						}
238						mXmppConnectionService.getAvatarService().clear(account);
239						mXmppConnectionService.updateConversationUi();
240						mXmppConnectionService.updateAccountUi();
241					} else {
242						Contact contact = account.getRoster().getContact(from);
243						contact.setAvatar(avatar);
244						mXmppConnectionService.getAvatarService().clear(contact);
245						mXmppConnectionService.updateConversationUi();
246						mXmppConnectionService.updateRosterUi();
247					}
248				} else if (mXmppConnectionService.isDataSaverDisabled()) {
249					mXmppConnectionService.fetchAvatar(account, avatar);
250				}
251			}
252		} else if ("http://jabber.org/protocol/nick".equals(node)) {
253			Element i = items.findChild("item");
254			Element nick = i == null ? null : i.findChild("nick", "http://jabber.org/protocol/nick");
255			if (nick != null && nick.getContent() != null) {
256				Contact contact = account.getRoster().getContact(from);
257				contact.setPresenceName(nick.getContent());
258				mXmppConnectionService.getAvatarService().clear(account);
259				mXmppConnectionService.updateConversationUi();
260				mXmppConnectionService.updateAccountUi();
261			}
262		} else if (AxolotlService.PEP_DEVICE_LIST.equals(node)) {
263
264			Element item = items.findChild("item");
265			Set<Integer> deviceIds = mXmppConnectionService.getIqParser().deviceIds(item);
266			Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account)+"Received PEP device list ("+deviceIds+") update from "+ from + ", processing...");
267			AxolotlService axolotlService = account.getAxolotlService();
268			axolotlService.registerDevices(from, deviceIds);
269			mXmppConnectionService.updateAccountUi();
270		}
271	}
272
273	private boolean handleErrorMessage(Account account, MessagePacket packet) {
274		if (packet.getType() == MessagePacket.TYPE_ERROR) {
275			Jid from = packet.getFrom();
276			if (from != null) {
277				Message message = mXmppConnectionService.markMessage(account,
278						from.toBareJid(),
279						packet.getId(),
280						Message.STATUS_SEND_FAILED,
281						extractErrorMessage(packet));
282				if (message != null) {
283					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
284						message.getConversation().endOtrIfNeeded();
285					}
286				}
287			}
288			return true;
289		}
290		return false;
291	}
292
293	@Override
294	public void onMessagePacketReceived(Account account, MessagePacket original) {
295		if (handleErrorMessage(account, original)) {
296			return;
297		}
298		final MessagePacket packet;
299		Long timestamp = null;
300		final boolean isForwarded;
301		boolean isCarbon = false;
302		String serverMsgId = null;
303		final Element result = original.findChild("result",Xmlns.MAM);
304		final MessageArchiveService.Query query = result == null ? null : mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
305		if (query != null && query.validFrom(original.getFrom())) {
306			Pair<MessagePacket, Long> f = original.getForwardedMessagePacket("result", Xmlns.MAM);
307			if (f == null) {
308				return;
309			}
310			timestamp = f.second;
311			packet = f.first;
312			isForwarded = true;
313			serverMsgId = result.getAttribute("id");
314			query.incrementMessageCount();
315		} else if (query != null) {
316			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received mam result from invalid sender");
317			return;
318		} else if (original.fromServer(account)) {
319			Pair<MessagePacket, Long> f;
320			f = original.getForwardedMessagePacket("received", "urn:xmpp:carbons:2");
321			f = f == null ? original.getForwardedMessagePacket("sent", "urn:xmpp:carbons:2") : f;
322			packet = f != null ? f.first : original;
323			if (handleErrorMessage(account, packet)) {
324				return;
325			}
326			timestamp = f != null ? f.second : null;
327			isCarbon = f != null;
328			isForwarded = isCarbon;
329		} else {
330			packet = original;
331			isForwarded = false;
332		}
333
334		if (timestamp == null) {
335			timestamp = AbstractParser.parseTimestamp(original,AbstractParser.parseTimestamp(packet));
336		}
337		final String body = packet.getBody();
338		final Element mucUserElement = packet.findChild("x", "http://jabber.org/protocol/muc#user");
339		final String pgpEncrypted = packet.findChildContent("x", "jabber:x:encrypted");
340		final Element replaceElement = packet.findChild("replace", "urn:xmpp:message-correct:0");
341		final Element oob = packet.findChild("x", "jabber:x:oob");
342		final boolean isOob = oob!= null && body != null && body.equals(oob.findChildContent("url"));
343		final String replacementId = replaceElement == null ? null : replaceElement.getAttribute("id");
344		final Element axolotlEncrypted = packet.findChild(XmppAxolotlMessage.CONTAINERTAG, AxolotlService.PEP_PREFIX);
345		int status;
346		final Jid counterpart;
347		final Jid to = packet.getTo();
348		final Jid from = packet.getFrom();
349		final String remoteMsgId = packet.getId();
350		boolean notify = false;
351
352		if (from == null) {
353			Log.d(Config.LOGTAG,"no from in: "+packet.toString());
354			return;
355		}
356		
357		boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
358		boolean isProperlyAddressed = (to != null ) && (!to.isBareJid() || account.countPresences() == 0);
359		boolean isMucStatusMessage = from.isBareJid() && mucUserElement != null && mucUserElement.hasChild("status");
360		if (packet.fromAccount(account)) {
361			status = Message.STATUS_SEND;
362			counterpart = to != null ? to : account.getJid();
363		} else {
364			status = Message.STATUS_RECEIVED;
365			counterpart = from;
366		}
367
368		Invite invite = extractInvite(account, packet);
369		if (invite != null && invite.execute(account)) {
370			return;
371		}
372
373		if (!isTypeGroupChat
374				&& query == null
375				&& extractChatState(mXmppConnectionService.find(account, counterpart.toBareJid()), packet)) {
376			mXmppConnectionService.updateConversationUi();
377		}
378
379		if ((body != null || pgpEncrypted != null || axolotlEncrypted != null) && !isMucStatusMessage) {
380			Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.toBareJid(), isTypeGroupChat, false, query);
381			final boolean conversationMultiMode = conversation.getMode() == Conversation.MODE_MULTI;
382			if (isTypeGroupChat) {
383				if (counterpart.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
384					status = Message.STATUS_SEND_RECEIVED;
385					isCarbon = true; //not really carbon but received from another resource
386					if (mXmppConnectionService.markMessage(conversation, remoteMsgId, status)) {
387						return;
388					} else if (remoteMsgId == null || Config.IGNORE_ID_REWRITE_IN_MUC) {
389						Message message = conversation.findSentMessageWithBody(packet.getBody());
390						if (message != null) {
391							mXmppConnectionService.markMessage(message, status);
392							return;
393						}
394					}
395				} else {
396					status = Message.STATUS_RECEIVED;
397				}
398			}
399			final Message message;
400			if (body != null && body.startsWith("?OTR") && Config.supportOtr()) {
401				if (!isForwarded && !isTypeGroupChat && isProperlyAddressed && !conversationMultiMode) {
402					message = parseOtrChat(body, from, remoteMsgId, conversation);
403					if (message == null) {
404						return;
405					}
406				} else {
407					Log.d(Config.LOGTAG,account.getJid().toBareJid()+": ignoring OTR message from "+from+" isForwarded="+Boolean.toString(isForwarded)+", isProperlyAddressed="+Boolean.valueOf(isProperlyAddressed));
408					message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
409				}
410			} else if (pgpEncrypted != null && Config.supportOpenPgp()) {
411				message = new Message(conversation, pgpEncrypted, Message.ENCRYPTION_PGP, status);
412			} else if (axolotlEncrypted != null && Config.supportOmemo()) {
413				Jid origin;
414				if (conversationMultiMode) {
415					final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
416					origin = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
417					if (origin == null) {
418						Log.d(Config.LOGTAG,"axolotl message in non anonymous conference received");
419						return;
420					}
421				} else {
422					origin = from;
423				}
424				message = parseAxolotlChat(axolotlEncrypted, origin, conversation, status);
425				if (message == null) {
426					return;
427				}
428				if (conversationMultiMode) {
429					message.setTrueCounterpart(origin);
430				}
431			} else {
432				message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
433			}
434
435			if (serverMsgId == null) {
436				final Jid by;
437				final boolean safeToExtract;
438				if (isTypeGroupChat) {
439					by = conversation.getJid().toBareJid();
440					safeToExtract = true; //conversation.getMucOptions().hasFeature(Xmlns.STANZA_IDS);
441				} else {
442					by = account.getJid().toBareJid();
443					safeToExtract = true; //account.getXmppConnection().getFeatures().stanzaIds();
444				}
445				if (safeToExtract) {
446					serverMsgId = extractStanzaId(packet, by);
447				}
448			}
449
450			message.setCounterpart(counterpart);
451			message.setRemoteMsgId(remoteMsgId);
452			message.setServerMsgId(serverMsgId);
453			message.setCarbon(isCarbon);
454			message.setTime(timestamp);
455			message.setOob(isOob);
456			message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
457			if (conversationMultiMode) {
458				final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
459				Jid trueCounterpart;
460				if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
461					trueCounterpart = message.getTrueCounterpart();
462				} else if (Config.PARSE_REAL_JID_FROM_MUC_MAM) {
463					trueCounterpart = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
464				} else {
465					trueCounterpart = fallback;
466				}
467				if (trueCounterpart != null && trueCounterpart.toBareJid().equals(account.getJid().toBareJid())) {
468					status = isTypeGroupChat ? Message.STATUS_SEND_RECEIVED : Message.STATUS_SEND;
469				}
470				message.setStatus(status);
471				message.setTrueCounterpart(trueCounterpart);
472				if (!isTypeGroupChat) {
473					message.setType(Message.TYPE_PRIVATE);
474				}
475			} else {
476				updateLastseen(account, from);
477			}
478
479			if (replacementId != null && mXmppConnectionService.allowMessageCorrection()) {
480				Message replacedMessage = conversation.findMessageWithRemoteIdAndCounterpart(replacementId,
481						counterpart,
482						message.getStatus() == Message.STATUS_RECEIVED,
483						message.isCarbon());
484				if (replacedMessage != null) {
485					final boolean fingerprintsMatch = replacedMessage.getFingerprint() == null
486							|| replacedMessage.getFingerprint().equals(message.getFingerprint());
487					final boolean trueCountersMatch = replacedMessage.getTrueCounterpart() != null
488							&& replacedMessage.getTrueCounterpart().equals(message.getTrueCounterpart());
489					final boolean duplicate = conversation.hasDuplicateMessage(message);
490					if (fingerprintsMatch && (trueCountersMatch || !conversationMultiMode) && !duplicate) {
491						Log.d(Config.LOGTAG, "replaced message '" + replacedMessage.getBody() + "' with '" + message.getBody() + "'");
492						synchronized (replacedMessage) {
493							final String uuid = replacedMessage.getUuid();
494							replacedMessage.setUuid(UUID.randomUUID().toString());
495							replacedMessage.setBody(message.getBody());
496							replacedMessage.setEdited(replacedMessage.getRemoteMsgId());
497							replacedMessage.setRemoteMsgId(remoteMsgId);
498							replacedMessage.setEncryption(message.getEncryption());
499							if (replacedMessage.getStatus() == Message.STATUS_RECEIVED) {
500								replacedMessage.markUnread();
501							}
502							mXmppConnectionService.updateMessage(replacedMessage, uuid);
503							mXmppConnectionService.getNotificationService().updateNotification(false);
504							if (mXmppConnectionService.confirmMessages() && remoteMsgId != null && !isForwarded && !isTypeGroupChat) {
505								sendMessageReceipts(account, packet);
506							}
507							if (replacedMessage.getEncryption() == Message.ENCRYPTION_PGP) {
508								conversation.getAccount().getPgpDecryptionService().discard(replacedMessage);
509								conversation.getAccount().getPgpDecryptionService().decrypt(replacedMessage, false);
510							}
511						}
512						return;
513					} else {
514						Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received message correction but verification didn't check out");
515					}
516				}
517			}
518
519			long deletionDate = mXmppConnectionService.getAutomaticMessageDeletionDate();
520			if (deletionDate != 0 && message.getTimeSent() < deletionDate) {
521				Log.d(Config.LOGTAG,account.getJid().toBareJid()+": skipping message from "+message.getCounterpart().toString()+" because it was sent prior to our deletion date");
522				return;
523			}
524
525			boolean checkForDuplicates = query != null
526					|| (isTypeGroupChat && packet.hasChild("delay","urn:xmpp:delay"))
527					|| message.getType() == Message.TYPE_PRIVATE;
528			if (checkForDuplicates && conversation.hasDuplicateMessage(message)) {
529				Log.d(Config.LOGTAG,"skipping duplicate message from "+message.getCounterpart().toString()+" "+message.getBody());
530				return;
531			}
532
533			if (query != null && query.getPagingOrder() == MessageArchiveService.PagingOrder.REVERSE) {
534				conversation.prepend(message);
535			} else {
536				conversation.add(message);
537			}
538			if (query != null) {
539				query.incrementActualMessageCount();
540			}
541
542			if (query == null || !query.isCatchup()) { //either no mam or catchup
543				if (status == Message.STATUS_SEND || status == Message.STATUS_SEND_RECEIVED) {
544					mXmppConnectionService.markRead(conversation);
545					if (query == null) {
546						activateGracePeriod(account);
547					}
548				} else {
549					message.markUnread();
550					notify = true;
551				}
552			}
553
554			if (message.getEncryption() == Message.ENCRYPTION_PGP) {
555				notify = conversation.getAccount().getPgpDecryptionService().decrypt(message, notify);
556			}
557
558			if (query == null) {
559				mXmppConnectionService.updateConversationUi();
560			}
561
562			if (mXmppConnectionService.confirmMessages()
563					&& message.trusted()
564					&& remoteMsgId != null
565					&& !isForwarded
566					&& !isTypeGroupChat) {
567				sendMessageReceipts(account, packet);
568			}
569
570			if (message.getStatus() == Message.STATUS_RECEIVED
571					&& conversation.getOtrSession() != null
572					&& !conversation.getOtrSession().getSessionID().getUserID()
573					.equals(message.getCounterpart().getResourcepart())) {
574				conversation.endOtrIfNeeded();
575			}
576
577			mXmppConnectionService.databaseBackend.createMessage(message);
578			final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
579			if (message.trusted() && message.treatAsDownloadable() != Message.Decision.NEVER && manager.getAutoAcceptFileSize() > 0) {
580				manager.createNewDownloadConnection(message);
581			} else if (notify) {
582				if (query == null) {
583					mXmppConnectionService.getNotificationService().push(message);
584				} else if (query.getWith() == null) { // mam catchup
585					mXmppConnectionService.getNotificationService().pushFromBacklog(message);
586				}
587			}
588		} else if (!packet.hasChild("body")){ //no body
589			Conversation conversation = mXmppConnectionService.find(account, from.toBareJid());
590			if (isTypeGroupChat) {
591				if (packet.hasChild("subject")) {
592					if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
593						conversation.setHasMessagesLeftOnServer(conversation.countMessages() > 0);
594						String subject = packet.findChildContent("subject");
595						conversation.getMucOptions().setSubject(subject);
596						final Bookmark bookmark = conversation.getBookmark();
597						if (bookmark != null && bookmark.getBookmarkName() == null) {
598							if (bookmark.setBookmarkName(subject)) {
599								mXmppConnectionService.pushBookmarks(account);
600							}
601						}
602						mXmppConnectionService.updateConversationUi();
603						return;
604					}
605				}
606			}
607			if (conversation != null && mucUserElement != null && from.isBareJid()) {
608				for (Element child : mucUserElement.getChildren()) {
609					if ("status".equals(child.getName())) {
610						try {
611							int code = Integer.parseInt(child.getAttribute("code"));
612							if ((code >= 170 && code <= 174) || (code >= 102 && code <= 104)) {
613								mXmppConnectionService.fetchConferenceConfiguration(conversation);
614								break;
615							}
616						} catch (Exception e) {
617							//ignored
618						}
619					} else if ("item".equals(child.getName())) {
620						MucOptions.User user = AbstractParser.parseItem(conversation,child);
621						Log.d(Config.LOGTAG,account.getJid()+": changing affiliation for "
622								+user.getRealJid()+" to "+user.getAffiliation()+" in "
623								+conversation.getJid().toBareJid());
624						if (!user.realJidMatchesAccount()) {
625							conversation.getMucOptions().updateUser(user);
626							mXmppConnectionService.getAvatarService().clear(conversation);
627							mXmppConnectionService.updateMucRosterUi();
628							mXmppConnectionService.updateConversationUi();
629							if (!user.getAffiliation().ranks(MucOptions.Affiliation.MEMBER)) {
630								Jid jid = user.getRealJid();
631								List<Jid> cryptoTargets = conversation.getAcceptedCryptoTargets();
632								if (cryptoTargets.remove(user.getRealJid())) {
633									Log.d(Config.LOGTAG,account.getJid().toBareJid()+": removed "+jid+" from crypto targets of "+conversation.getName());
634									conversation.setAcceptedCryptoTargets(cryptoTargets);
635									mXmppConnectionService.updateConversation(conversation);
636								}
637							}
638						}
639					}
640				}
641			}
642		}
643
644
645
646		Element received = packet.findChild("received", "urn:xmpp:chat-markers:0");
647		if (received == null) {
648			received = packet.findChild("received", "urn:xmpp:receipts");
649		}
650		if (received != null && !packet.fromAccount(account)) {
651			mXmppConnectionService.markMessage(account, from.toBareJid(), received.getAttribute("id"), Message.STATUS_SEND_RECEIVED);
652		}
653		Element displayed = packet.findChild("displayed", "urn:xmpp:chat-markers:0");
654		if (displayed != null) {
655			if (packet.fromAccount(account)) {
656				Conversation conversation = mXmppConnectionService.find(account,counterpart.toBareJid());
657				if (conversation != null) {
658					mXmppConnectionService.markRead(conversation);
659				}
660			} else {
661				final Message displayedMessage = mXmppConnectionService.markMessage(account, from.toBareJid(), displayed.getAttribute("id"), Message.STATUS_SEND_DISPLAYED);
662				Message message = displayedMessage == null ? null : displayedMessage.prev();
663				while (message != null
664						&& message.getStatus() == Message.STATUS_SEND_RECEIVED
665						&& message.getTimeSent() < displayedMessage.getTimeSent()) {
666					mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
667					message = message.prev();
668				}
669			}
670		}
671
672		Element event = original.findChild("event", "http://jabber.org/protocol/pubsub#event");
673		if (event != null) {
674			parseEvent(event, original.getFrom(), account);
675		}
676
677		String nick = packet.findChildContent("nick", "http://jabber.org/protocol/nick");
678		if (nick != null) {
679			Contact contact = account.getRoster().getContact(from);
680			contact.setPresenceName(nick);
681		}
682	}
683
684	private static Jid getTrueCounterpart(Element mucUserElement, Jid fallback) {
685		final Element item = mucUserElement == null ? null : mucUserElement.findChild("item");
686		Jid result = item == null ? null : item.getAttributeAsJid("jid");
687		return result != null ? result : fallback;
688	}
689
690	private void sendMessageReceipts(Account account, MessagePacket packet) {
691		ArrayList<String> receiptsNamespaces = new ArrayList<>();
692		if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
693			receiptsNamespaces.add("urn:xmpp:chat-markers:0");
694		}
695		if (packet.hasChild("request", "urn:xmpp:receipts")) {
696			receiptsNamespaces.add("urn:xmpp:receipts");
697		}
698		if (receiptsNamespaces.size() > 0) {
699			MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
700					packet,
701					receiptsNamespaces,
702					packet.getType());
703			mXmppConnectionService.sendMessagePacket(account, receipt);
704		}
705	}
706
707	private static SimpleDateFormat TIME_FORMAT = new SimpleDateFormat("HH:mm:ss");
708
709	private void activateGracePeriod(Account account) {
710		long duration = mXmppConnectionService.getPreferences().getLong("race_period_length", 144) * 1000;
711		Log.d(Config.LOGTAG,account.getJid().toBareJid()+": activating grace period till "+TIME_FORMAT.format(new Date(System.currentTimeMillis() + duration)));
712		account.activateGracePeriod(duration);
713	}
714}