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		Jid jid;
171		String password;
172		Invite(Jid jid, String password) {
173			this.jid = jid;
174			this.password = password;
175		}
176
177		public boolean execute(Account account) {
178			if (jid != null) {
179				Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, jid, true);
180				if (!conversation.getMucOptions().online()) {
181					conversation.getMucOptions().setPassword(password);
182					mXmppConnectionService.databaseBackend.updateConversation(conversation);
183					mXmppConnectionService.joinMuc(conversation);
184					mXmppConnectionService.updateConversationUi();
185				}
186				return true;
187			}
188			return false;
189		}
190	}
191
192	private Invite extractInvite(Element message) {
193		Element x = message.findChild("x", "http://jabber.org/protocol/muc#user");
194		if (x != null) {
195			Element invite = x.findChild("invite");
196			if (invite != null) {
197				Element pw = x.findChild("password");
198				return new Invite(message.getAttributeAsJid("from"), pw != null ? pw.getContent(): null);
199			}
200		} else {
201			x = message.findChild("x","jabber:x:conference");
202			if (x != null) {
203				return new Invite(x.getAttributeAsJid("jid"),x.getAttribute("password"));
204			}
205		}
206		return null;
207	}
208
209	private static String extractStanzaId(Element packet, Jid by) {
210		for(Element child : packet.getChildren()) {
211			if (child.getName().equals("stanza-id")
212					&& Xmlns.STANZA_IDS.equals(child.getNamespace())
213					&& by.equals(child.getAttributeAsJid("by"))) {
214				return child.getAttribute("id");
215			}
216		}
217		return null;
218	}
219
220	private void parseEvent(final Element event, final Jid from, final Account account) {
221		Element items = event.findChild("items");
222		String node = items == null ? null : items.getAttribute("node");
223		if ("urn:xmpp:avatar:metadata".equals(node)) {
224			Avatar avatar = Avatar.parseMetadata(items);
225			if (avatar != null) {
226				avatar.owner = from.toBareJid();
227				if (mXmppConnectionService.getFileBackend().isAvatarCached(avatar)) {
228					if (account.getJid().toBareJid().equals(from)) {
229						if (account.setAvatar(avatar.getFilename())) {
230							mXmppConnectionService.databaseBackend.updateAccount(account);
231						}
232						mXmppConnectionService.getAvatarService().clear(account);
233						mXmppConnectionService.updateConversationUi();
234						mXmppConnectionService.updateAccountUi();
235					} else {
236						Contact contact = account.getRoster().getContact(from);
237						contact.setAvatar(avatar);
238						mXmppConnectionService.getAvatarService().clear(contact);
239						mXmppConnectionService.updateConversationUi();
240						mXmppConnectionService.updateRosterUi();
241					}
242				} else if (mXmppConnectionService.isDataSaverDisabled()) {
243					mXmppConnectionService.fetchAvatar(account, avatar);
244				}
245			}
246		} else if ("http://jabber.org/protocol/nick".equals(node)) {
247			Element i = items.findChild("item");
248			Element nick = i == null ? null : i.findChild("nick", "http://jabber.org/protocol/nick");
249			if (nick != null && nick.getContent() != null) {
250				Contact contact = account.getRoster().getContact(from);
251				contact.setPresenceName(nick.getContent());
252				mXmppConnectionService.getAvatarService().clear(account);
253				mXmppConnectionService.updateConversationUi();
254				mXmppConnectionService.updateAccountUi();
255			}
256		} else if (AxolotlService.PEP_DEVICE_LIST.equals(node)) {
257			Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account)+"Received PEP device list update from "+ from + ", processing...");
258			Element item = items.findChild("item");
259			Set<Integer> deviceIds = mXmppConnectionService.getIqParser().deviceIds(item);
260			AxolotlService axolotlService = account.getAxolotlService();
261			axolotlService.registerDevices(from, deviceIds);
262			mXmppConnectionService.updateAccountUi();
263		}
264	}
265
266	private boolean handleErrorMessage(Account account, MessagePacket packet) {
267		if (packet.getType() == MessagePacket.TYPE_ERROR) {
268			Jid from = packet.getFrom();
269			if (from != null) {
270				Message message = mXmppConnectionService.markMessage(account,
271						from.toBareJid(),
272						packet.getId(),
273						Message.STATUS_SEND_FAILED,
274						extractErrorMessage(packet));
275				if (message != null) {
276					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
277						message.getConversation().endOtrIfNeeded();
278					}
279				}
280			}
281			return true;
282		}
283		return false;
284	}
285
286	@Override
287	public void onMessagePacketReceived(Account account, MessagePacket original) {
288		if (handleErrorMessage(account, original)) {
289			return;
290		}
291		final MessagePacket packet;
292		Long timestamp = null;
293		final boolean isForwarded;
294		boolean isCarbon = false;
295		String serverMsgId = null;
296		final Element fin = original.findChild("fin", "urn:xmpp:mam:0");
297		if (fin != null) {
298			mXmppConnectionService.getMessageArchiveService().processFin(fin,original.getFrom());
299			return;
300		}
301		final Element result = original.findChild("result","urn:xmpp:mam:0");
302		final MessageArchiveService.Query query = result == null ? null : mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
303		if (query != null && query.validFrom(original.getFrom())) {
304			Pair<MessagePacket, Long> f = original.getForwardedMessagePacket("result", "urn:xmpp:mam:0");
305			if (f == null) {
306				return;
307			}
308			timestamp = f.second;
309			packet = f.first;
310			isForwarded = true;
311			serverMsgId = result.getAttribute("id");
312			query.incrementMessageCount();
313		} else if (query != null) {
314			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received mam result from invalid sender");
315			return;
316		} else if (original.fromServer(account)) {
317			Pair<MessagePacket, Long> f;
318			f = original.getForwardedMessagePacket("received", "urn:xmpp:carbons:2");
319			f = f == null ? original.getForwardedMessagePacket("sent", "urn:xmpp:carbons:2") : f;
320			packet = f != null ? f.first : original;
321			if (handleErrorMessage(account, packet)) {
322				return;
323			}
324			timestamp = f != null ? f.second : null;
325			isCarbon = f != null;
326			isForwarded = isCarbon;
327		} else {
328			packet = original;
329			isForwarded = false;
330		}
331
332		if (timestamp == null) {
333			timestamp = AbstractParser.parseTimestamp(original,AbstractParser.parseTimestamp(packet));
334		}
335		final String body = packet.getBody();
336		final Element mucUserElement = packet.findChild("x", "http://jabber.org/protocol/muc#user");
337		final String pgpEncrypted = packet.findChildContent("x", "jabber:x:encrypted");
338		final Element replaceElement = packet.findChild("replace", "urn:xmpp:message-correct:0");
339		final Element oob = packet.findChild("x", "jabber:x:oob");
340		final boolean isOob = oob!= null && body != null && body.equals(oob.findChildContent("url"));
341		final String replacementId = replaceElement == null ? null : replaceElement.getAttribute("id");
342		final Element axolotlEncrypted = packet.findChild(XmppAxolotlMessage.CONTAINERTAG, AxolotlService.PEP_PREFIX);
343		int status;
344		final Jid counterpart;
345		final Jid to = packet.getTo();
346		final Jid from = packet.getFrom();
347		final String remoteMsgId = packet.getId();
348		boolean notify = false;
349
350		if (from == null) {
351			Log.d(Config.LOGTAG,"no from in: "+packet.toString());
352			return;
353		}
354		
355		boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
356		boolean isProperlyAddressed = (to != null ) && (!to.isBareJid() || account.countPresences() == 0);
357		boolean isMucStatusMessage = from.isBareJid() && mucUserElement != null && mucUserElement.hasChild("status");
358		if (packet.fromAccount(account)) {
359			status = Message.STATUS_SEND;
360			counterpart = to != null ? to : account.getJid();
361		} else {
362			status = Message.STATUS_RECEIVED;
363			counterpart = from;
364		}
365
366		Invite invite = extractInvite(packet);
367		if (invite != null && invite.execute(account)) {
368			return;
369		}
370
371		if (!isTypeGroupChat
372				&& query == null
373				&& extractChatState(mXmppConnectionService.find(account, counterpart.toBareJid()), packet)) {
374			mXmppConnectionService.updateConversationUi();
375		}
376
377		if ((body != null || pgpEncrypted != null || axolotlEncrypted != null) && !isMucStatusMessage) {
378			Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.toBareJid(), isTypeGroupChat, query);
379			final boolean conversationMultiMode = conversation.getMode() == Conversation.MODE_MULTI;
380			if (isTypeGroupChat) {
381				if (counterpart.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
382					status = Message.STATUS_SEND_RECEIVED;
383					isCarbon = true; //not really carbon but received from another resource
384					if (mXmppConnectionService.markMessage(conversation, remoteMsgId, status)) {
385						return;
386					} else if (remoteMsgId == null || Config.IGNORE_ID_REWRITE_IN_MUC) {
387						Message message = conversation.findSentMessageWithBody(packet.getBody());
388						if (message != null) {
389							mXmppConnectionService.markMessage(message, status);
390							return;
391						}
392					}
393				} else {
394					status = Message.STATUS_RECEIVED;
395				}
396			}
397			final Message message;
398			if (body != null && body.startsWith("?OTR") && Config.supportOtr()) {
399				if (!isForwarded && !isTypeGroupChat && isProperlyAddressed && !conversationMultiMode) {
400					message = parseOtrChat(body, from, remoteMsgId, conversation);
401					if (message == null) {
402						return;
403					}
404				} else {
405					Log.d(Config.LOGTAG,account.getJid().toBareJid()+": ignoring OTR message from "+from+" isForwarded="+Boolean.toString(isForwarded)+", isProperlyAddressed="+Boolean.valueOf(isProperlyAddressed));
406					message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
407				}
408			} else if (pgpEncrypted != null && Config.supportOpenPgp()) {
409				message = new Message(conversation, pgpEncrypted, Message.ENCRYPTION_PGP, status);
410			} else if (axolotlEncrypted != null && Config.supportOmemo()) {
411				Jid origin;
412				if (conversationMultiMode) {
413					final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
414					origin = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
415					if (origin == null) {
416						Log.d(Config.LOGTAG,"axolotl message in non anonymous conference received");
417						return;
418					}
419				} else {
420					origin = from;
421				}
422				message = parseAxolotlChat(axolotlEncrypted, origin, conversation, status);
423				if (message == null) {
424					return;
425				}
426				if (conversationMultiMode) {
427					message.setTrueCounterpart(origin);
428				}
429			} else {
430				message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
431			}
432
433			if (serverMsgId == null) {
434				final Jid by;
435				final boolean safeToExtract;
436				if (isTypeGroupChat) {
437					by = conversation.getJid().toBareJid();
438					safeToExtract = true; //conversation.getMucOptions().hasFeature(Xmlns.STANZA_IDS);
439				} else {
440					by = account.getJid().toBareJid();
441					safeToExtract = true; //account.getXmppConnection().getFeatures().stanzaIds();
442				}
443				if (safeToExtract) {
444					serverMsgId = extractStanzaId(packet, by);
445				}
446			}
447
448			message.setCounterpart(counterpart);
449			message.setRemoteMsgId(remoteMsgId);
450			message.setServerMsgId(serverMsgId);
451			message.setCarbon(isCarbon);
452			message.setTime(timestamp);
453			message.setOob(isOob);
454			message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
455			if (conversationMultiMode) {
456				final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
457				Jid trueCounterpart;
458				if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
459					trueCounterpart = message.getTrueCounterpart();
460				} else if (Config.PARSE_REAL_JID_FROM_MUC_MAM) {
461					trueCounterpart = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
462				} else {
463					trueCounterpart = fallback;
464				}
465				if (trueCounterpart != null && trueCounterpart.toBareJid().equals(account.getJid().toBareJid())) {
466					status = isTypeGroupChat ? Message.STATUS_SEND_RECEIVED : Message.STATUS_SEND;
467				}
468				message.setStatus(status);
469				message.setTrueCounterpart(trueCounterpart);
470				if (!isTypeGroupChat) {
471					message.setType(Message.TYPE_PRIVATE);
472				}
473			} else {
474				updateLastseen(account, from);
475			}
476
477			if (replacementId != null && mXmppConnectionService.allowMessageCorrection()) {
478				Message replacedMessage = conversation.findMessageWithRemoteIdAndCounterpart(replacementId,
479						counterpart,
480						message.getStatus() == Message.STATUS_RECEIVED,
481						message.isCarbon());
482				if (replacedMessage != null) {
483					final boolean fingerprintsMatch = replacedMessage.getFingerprint() == null
484							|| replacedMessage.getFingerprint().equals(message.getFingerprint());
485					final boolean trueCountersMatch = replacedMessage.getTrueCounterpart() != null
486							&& replacedMessage.getTrueCounterpart().equals(message.getTrueCounterpart());
487					final boolean duplicate = conversation.hasDuplicateMessage(message);
488					if (fingerprintsMatch && (trueCountersMatch || !conversationMultiMode) && !duplicate) {
489						Log.d(Config.LOGTAG, "replaced message '" + replacedMessage.getBody() + "' with '" + message.getBody() + "'");
490						synchronized (replacedMessage) {
491							final String uuid = replacedMessage.getUuid();
492							replacedMessage.setUuid(UUID.randomUUID().toString());
493							replacedMessage.setBody(message.getBody());
494							replacedMessage.setEdited(replacedMessage.getRemoteMsgId());
495							replacedMessage.setRemoteMsgId(remoteMsgId);
496							replacedMessage.setEncryption(message.getEncryption());
497							if (replacedMessage.getStatus() == Message.STATUS_RECEIVED) {
498								replacedMessage.markUnread();
499							}
500							mXmppConnectionService.updateMessage(replacedMessage, uuid);
501							mXmppConnectionService.getNotificationService().updateNotification(false);
502							if (mXmppConnectionService.confirmMessages() && remoteMsgId != null && !isForwarded && !isTypeGroupChat) {
503								sendMessageReceipts(account, packet);
504							}
505							if (replacedMessage.getEncryption() == Message.ENCRYPTION_PGP) {
506								conversation.getAccount().getPgpDecryptionService().discard(replacedMessage);
507								conversation.getAccount().getPgpDecryptionService().decrypt(replacedMessage, false);
508							}
509						}
510						return;
511					} else {
512						Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received message correction but verification didn't check out");
513					}
514				}
515			}
516
517			boolean checkForDuplicates = query != null
518					|| (isTypeGroupChat && packet.hasChild("delay","urn:xmpp:delay"))
519					|| message.getType() == Message.TYPE_PRIVATE;
520			if (checkForDuplicates && conversation.hasDuplicateMessage(message)) {
521				Log.d(Config.LOGTAG,"skipping duplicate message from "+message.getCounterpart().toString()+" "+message.getBody());
522				return;
523			}
524
525			if (query != null && query.getPagingOrder() == MessageArchiveService.PagingOrder.REVERSE) {
526				conversation.prepend(message);
527			} else {
528				conversation.add(message);
529			}
530
531			if (query == null || query.getWith() == null) { //either no mam or catchup
532				if (status == Message.STATUS_SEND || status == Message.STATUS_SEND_RECEIVED) {
533					mXmppConnectionService.markRead(conversation);
534					if (query == null) {
535						activateGracePeriod(account);
536					}
537				} else {
538					message.markUnread();
539					notify = true;
540				}
541			}
542
543			if (message.getEncryption() == Message.ENCRYPTION_PGP) {
544				notify = conversation.getAccount().getPgpDecryptionService().decrypt(message, notify);
545			}
546
547			if (query == null) {
548				mXmppConnectionService.updateConversationUi();
549			}
550
551			if (mXmppConnectionService.confirmMessages()
552					&& message.trusted()
553					&& remoteMsgId != null
554					&& !isForwarded
555					&& !isTypeGroupChat) {
556				sendMessageReceipts(account, packet);
557			}
558
559			if (message.getStatus() == Message.STATUS_RECEIVED
560					&& conversation.getOtrSession() != null
561					&& !conversation.getOtrSession().getSessionID().getUserID()
562					.equals(message.getCounterpart().getResourcepart())) {
563				conversation.endOtrIfNeeded();
564			}
565
566			if (message.getEncryption() == Message.ENCRYPTION_NONE || mXmppConnectionService.saveEncryptedMessages()) {
567				mXmppConnectionService.databaseBackend.createMessage(message);
568			}
569			final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
570			if (message.trusted() && message.treatAsDownloadable() != Message.Decision.NEVER && manager.getAutoAcceptFileSize() > 0) {
571				manager.createNewDownloadConnection(message);
572			} else if (notify) {
573				if (query == null) {
574					mXmppConnectionService.getNotificationService().push(message);
575				} else if (query.getWith() == null) { // mam catchup
576					mXmppConnectionService.getNotificationService().pushFromBacklog(message);
577				}
578			}
579		} else if (!packet.hasChild("body")){ //no body
580			Conversation conversation = mXmppConnectionService.find(account, from.toBareJid());
581			if (isTypeGroupChat) {
582				if (packet.hasChild("subject")) {
583					if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
584						conversation.setHasMessagesLeftOnServer(conversation.countMessages() > 0);
585						String subject = packet.findChildContent("subject");
586						conversation.getMucOptions().setSubject(subject);
587						final Bookmark bookmark = conversation.getBookmark();
588						if (bookmark != null && bookmark.getBookmarkName() == null) {
589							if (bookmark.setBookmarkName(subject)) {
590								mXmppConnectionService.pushBookmarks(account);
591							}
592						}
593						mXmppConnectionService.updateConversationUi();
594						return;
595					}
596				}
597			}
598			if (conversation != null && mucUserElement != null && from.isBareJid()) {
599				for (Element child : mucUserElement.getChildren()) {
600					if ("status".equals(child.getName())) {
601						try {
602							int code = Integer.parseInt(child.getAttribute("code"));
603							if ((code >= 170 && code <= 174) || (code >= 102 && code <= 104)) {
604								mXmppConnectionService.fetchConferenceConfiguration(conversation);
605								break;
606							}
607						} catch (Exception e) {
608							//ignored
609						}
610					} else if ("item".equals(child.getName())) {
611						MucOptions.User user = AbstractParser.parseItem(conversation,child);
612						Log.d(Config.LOGTAG,account.getJid()+": changing affiliation for "
613								+user.getRealJid()+" to "+user.getAffiliation()+" in "
614								+conversation.getJid().toBareJid());
615						if (!user.realJidMatchesAccount()) {
616							conversation.getMucOptions().updateUser(user);
617							mXmppConnectionService.getAvatarService().clear(conversation);
618							mXmppConnectionService.updateMucRosterUi();
619							mXmppConnectionService.updateConversationUi();
620						}
621					}
622				}
623			}
624		}
625
626
627
628		Element received = packet.findChild("received", "urn:xmpp:chat-markers:0");
629		if (received == null) {
630			received = packet.findChild("received", "urn:xmpp:receipts");
631		}
632		if (received != null && !packet.fromAccount(account)) {
633			mXmppConnectionService.markMessage(account, from.toBareJid(), received.getAttribute("id"), Message.STATUS_SEND_RECEIVED);
634		}
635		Element displayed = packet.findChild("displayed", "urn:xmpp:chat-markers:0");
636		if (displayed != null) {
637			if (packet.fromAccount(account)) {
638				Conversation conversation = mXmppConnectionService.find(account,counterpart.toBareJid());
639				if (conversation != null) {
640					mXmppConnectionService.markRead(conversation);
641				}
642			} else {
643				final Message displayedMessage = mXmppConnectionService.markMessage(account, from.toBareJid(), displayed.getAttribute("id"), Message.STATUS_SEND_DISPLAYED);
644				Message message = displayedMessage == null ? null : displayedMessage.prev();
645				while (message != null
646						&& message.getStatus() == Message.STATUS_SEND_RECEIVED
647						&& message.getTimeSent() < displayedMessage.getTimeSent()) {
648					mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
649					message = message.prev();
650				}
651			}
652		}
653
654		Element event = packet.findChild("event", "http://jabber.org/protocol/pubsub#event");
655		if (event != null) {
656			parseEvent(event, from, account);
657		}
658
659		String nick = packet.findChildContent("nick", "http://jabber.org/protocol/nick");
660		if (nick != null) {
661			Contact contact = account.getRoster().getContact(from);
662			contact.setPresenceName(nick);
663		}
664	}
665
666	private static Jid getTrueCounterpart(Element mucUserElement, Jid fallback) {
667		final Element item = mucUserElement == null ? null : mucUserElement.findChild("item");
668		Jid result = item == null ? null : item.getAttributeAsJid("jid");
669		return result != null ? result : fallback;
670	}
671
672	private void sendMessageReceipts(Account account, MessagePacket packet) {
673		ArrayList<String> receiptsNamespaces = new ArrayList<>();
674		if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
675			receiptsNamespaces.add("urn:xmpp:chat-markers:0");
676		}
677		if (packet.hasChild("request", "urn:xmpp:receipts")) {
678			receiptsNamespaces.add("urn:xmpp:receipts");
679		}
680		if (receiptsNamespaces.size() > 0) {
681			MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
682					packet,
683					receiptsNamespaces,
684					packet.getType());
685			mXmppConnectionService.sendMessagePacket(account, receipt);
686		}
687	}
688
689	private static SimpleDateFormat TIME_FORMAT = new SimpleDateFormat("HH:mm:ss");
690
691	private void activateGracePeriod(Account account) {
692		long duration = mXmppConnectionService.getPreferences().getLong("race_period_length", 144) * 1000;
693		Log.d(Config.LOGTAG,account.getJid().toBareJid()+": activating grace period till "+TIME_FORMAT.format(new Date(System.currentTimeMillis() + duration)));
694		account.activateGracePeriod(duration);
695	}
696}