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 fin = original.findChild("fin", "urn:xmpp:mam:0");
304		if (fin != null) {
305			mXmppConnectionService.getMessageArchiveService().processFin(fin,original.getFrom());
306			return;
307		}
308		final Element result = original.findChild("result","urn:xmpp:mam:0");
309		final MessageArchiveService.Query query = result == null ? null : mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
310		if (query != null && query.validFrom(original.getFrom())) {
311			Pair<MessagePacket, Long> f = original.getForwardedMessagePacket("result", "urn:xmpp:mam:0");
312			if (f == null) {
313				return;
314			}
315			timestamp = f.second;
316			packet = f.first;
317			isForwarded = true;
318			serverMsgId = result.getAttribute("id");
319			query.incrementMessageCount();
320		} else if (query != null) {
321			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received mam result from invalid sender");
322			return;
323		} else if (original.fromServer(account)) {
324			Pair<MessagePacket, Long> f;
325			f = original.getForwardedMessagePacket("received", "urn:xmpp:carbons:2");
326			f = f == null ? original.getForwardedMessagePacket("sent", "urn:xmpp:carbons:2") : f;
327			packet = f != null ? f.first : original;
328			if (handleErrorMessage(account, packet)) {
329				return;
330			}
331			timestamp = f != null ? f.second : null;
332			isCarbon = f != null;
333			isForwarded = isCarbon;
334		} else {
335			packet = original;
336			isForwarded = false;
337		}
338
339		if (timestamp == null) {
340			timestamp = AbstractParser.parseTimestamp(original,AbstractParser.parseTimestamp(packet));
341		}
342		final String body = packet.getBody();
343		final Element mucUserElement = packet.findChild("x", "http://jabber.org/protocol/muc#user");
344		final String pgpEncrypted = packet.findChildContent("x", "jabber:x:encrypted");
345		final Element replaceElement = packet.findChild("replace", "urn:xmpp:message-correct:0");
346		final Element oob = packet.findChild("x", "jabber:x:oob");
347		final boolean isOob = oob!= null && body != null && body.equals(oob.findChildContent("url"));
348		final String replacementId = replaceElement == null ? null : replaceElement.getAttribute("id");
349		final Element axolotlEncrypted = packet.findChild(XmppAxolotlMessage.CONTAINERTAG, AxolotlService.PEP_PREFIX);
350		int status;
351		final Jid counterpart;
352		final Jid to = packet.getTo();
353		final Jid from = packet.getFrom();
354		final String remoteMsgId = packet.getId();
355		boolean notify = false;
356
357		if (from == null) {
358			Log.d(Config.LOGTAG,"no from in: "+packet.toString());
359			return;
360		}
361		
362		boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
363		boolean isProperlyAddressed = (to != null ) && (!to.isBareJid() || account.countPresences() == 0);
364		boolean isMucStatusMessage = from.isBareJid() && mucUserElement != null && mucUserElement.hasChild("status");
365		if (packet.fromAccount(account)) {
366			status = Message.STATUS_SEND;
367			counterpart = to != null ? to : account.getJid();
368		} else {
369			status = Message.STATUS_RECEIVED;
370			counterpart = from;
371		}
372
373		Invite invite = extractInvite(account, packet);
374		if (invite != null && invite.execute(account)) {
375			return;
376		}
377
378		if (!isTypeGroupChat
379				&& query == null
380				&& extractChatState(mXmppConnectionService.find(account, counterpart.toBareJid()), packet)) {
381			mXmppConnectionService.updateConversationUi();
382		}
383
384		if ((body != null || pgpEncrypted != null || axolotlEncrypted != null) && !isMucStatusMessage) {
385			Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.toBareJid(), isTypeGroupChat, query);
386			final boolean conversationMultiMode = conversation.getMode() == Conversation.MODE_MULTI;
387			if (isTypeGroupChat) {
388				if (counterpart.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
389					status = Message.STATUS_SEND_RECEIVED;
390					isCarbon = true; //not really carbon but received from another resource
391					if (mXmppConnectionService.markMessage(conversation, remoteMsgId, status)) {
392						return;
393					} else if (remoteMsgId == null || Config.IGNORE_ID_REWRITE_IN_MUC) {
394						Message message = conversation.findSentMessageWithBody(packet.getBody());
395						if (message != null) {
396							mXmppConnectionService.markMessage(message, status);
397							return;
398						}
399					}
400				} else {
401					status = Message.STATUS_RECEIVED;
402				}
403			}
404			final Message message;
405			if (body != null && body.startsWith("?OTR") && Config.supportOtr()) {
406				if (!isForwarded && !isTypeGroupChat && isProperlyAddressed && !conversationMultiMode) {
407					message = parseOtrChat(body, from, remoteMsgId, conversation);
408					if (message == null) {
409						return;
410					}
411				} else {
412					Log.d(Config.LOGTAG,account.getJid().toBareJid()+": ignoring OTR message from "+from+" isForwarded="+Boolean.toString(isForwarded)+", isProperlyAddressed="+Boolean.valueOf(isProperlyAddressed));
413					message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
414				}
415			} else if (pgpEncrypted != null && Config.supportOpenPgp()) {
416				message = new Message(conversation, pgpEncrypted, Message.ENCRYPTION_PGP, status);
417			} else if (axolotlEncrypted != null && Config.supportOmemo()) {
418				Jid origin;
419				if (conversationMultiMode) {
420					final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
421					origin = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
422					if (origin == null) {
423						Log.d(Config.LOGTAG,"axolotl message in non anonymous conference received");
424						return;
425					}
426				} else {
427					origin = from;
428				}
429				message = parseAxolotlChat(axolotlEncrypted, origin, conversation, status);
430				if (message == null) {
431					return;
432				}
433				if (conversationMultiMode) {
434					message.setTrueCounterpart(origin);
435				}
436			} else {
437				message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
438			}
439
440			if (serverMsgId == null) {
441				final Jid by;
442				final boolean safeToExtract;
443				if (isTypeGroupChat) {
444					by = conversation.getJid().toBareJid();
445					safeToExtract = true; //conversation.getMucOptions().hasFeature(Xmlns.STANZA_IDS);
446				} else {
447					by = account.getJid().toBareJid();
448					safeToExtract = true; //account.getXmppConnection().getFeatures().stanzaIds();
449				}
450				if (safeToExtract) {
451					serverMsgId = extractStanzaId(packet, by);
452				}
453			}
454
455			message.setCounterpart(counterpart);
456			message.setRemoteMsgId(remoteMsgId);
457			message.setServerMsgId(serverMsgId);
458			message.setCarbon(isCarbon);
459			message.setTime(timestamp);
460			message.setOob(isOob);
461			message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
462			if (conversationMultiMode) {
463				final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
464				Jid trueCounterpart;
465				if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
466					trueCounterpart = message.getTrueCounterpart();
467				} else if (Config.PARSE_REAL_JID_FROM_MUC_MAM) {
468					trueCounterpart = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
469				} else {
470					trueCounterpart = fallback;
471				}
472				if (trueCounterpart != null && trueCounterpart.toBareJid().equals(account.getJid().toBareJid())) {
473					status = isTypeGroupChat ? Message.STATUS_SEND_RECEIVED : Message.STATUS_SEND;
474				}
475				message.setStatus(status);
476				message.setTrueCounterpart(trueCounterpart);
477				if (!isTypeGroupChat) {
478					message.setType(Message.TYPE_PRIVATE);
479				}
480			} else {
481				updateLastseen(account, from);
482			}
483
484			if (replacementId != null && mXmppConnectionService.allowMessageCorrection()) {
485				Message replacedMessage = conversation.findMessageWithRemoteIdAndCounterpart(replacementId,
486						counterpart,
487						message.getStatus() == Message.STATUS_RECEIVED,
488						message.isCarbon());
489				if (replacedMessage != null) {
490					final boolean fingerprintsMatch = replacedMessage.getFingerprint() == null
491							|| replacedMessage.getFingerprint().equals(message.getFingerprint());
492					final boolean trueCountersMatch = replacedMessage.getTrueCounterpart() != null
493							&& replacedMessage.getTrueCounterpart().equals(message.getTrueCounterpart());
494					final boolean duplicate = conversation.hasDuplicateMessage(message);
495					if (fingerprintsMatch && (trueCountersMatch || !conversationMultiMode) && !duplicate) {
496						Log.d(Config.LOGTAG, "replaced message '" + replacedMessage.getBody() + "' with '" + message.getBody() + "'");
497						synchronized (replacedMessage) {
498							final String uuid = replacedMessage.getUuid();
499							replacedMessage.setUuid(UUID.randomUUID().toString());
500							replacedMessage.setBody(message.getBody());
501							replacedMessage.setEdited(replacedMessage.getRemoteMsgId());
502							replacedMessage.setRemoteMsgId(remoteMsgId);
503							replacedMessage.setEncryption(message.getEncryption());
504							if (replacedMessage.getStatus() == Message.STATUS_RECEIVED) {
505								replacedMessage.markUnread();
506							}
507							mXmppConnectionService.updateMessage(replacedMessage, uuid);
508							mXmppConnectionService.getNotificationService().updateNotification(false);
509							if (mXmppConnectionService.confirmMessages() && remoteMsgId != null && !isForwarded && !isTypeGroupChat) {
510								sendMessageReceipts(account, packet);
511							}
512							if (replacedMessage.getEncryption() == Message.ENCRYPTION_PGP) {
513								conversation.getAccount().getPgpDecryptionService().discard(replacedMessage);
514								conversation.getAccount().getPgpDecryptionService().decrypt(replacedMessage, false);
515							}
516						}
517						return;
518					} else {
519						Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received message correction but verification didn't check out");
520					}
521				}
522			}
523
524			long deletionDate = mXmppConnectionService.getAutomaticMessageDeletionDate();
525			if (deletionDate != 0 && message.getTimeSent() < deletionDate) {
526				Log.d(Config.LOGTAG,account.getJid().toBareJid()+": skipping message from "+message.getCounterpart().toString()+" because it was sent prior to our deletion date");
527				return;
528			}
529
530			boolean checkForDuplicates = query != null
531					|| (isTypeGroupChat && packet.hasChild("delay","urn:xmpp:delay"))
532					|| message.getType() == Message.TYPE_PRIVATE;
533			if (checkForDuplicates && conversation.hasDuplicateMessage(message)) {
534				Log.d(Config.LOGTAG,"skipping duplicate message from "+message.getCounterpart().toString()+" "+message.getBody());
535				return;
536			}
537
538			if (query != null && query.getPagingOrder() == MessageArchiveService.PagingOrder.REVERSE) {
539				conversation.prepend(message);
540			} else {
541				conversation.add(message);
542			}
543
544			if (query == null || query.getWith() == null) { //either no mam or catchup
545				if (status == Message.STATUS_SEND || status == Message.STATUS_SEND_RECEIVED) {
546					mXmppConnectionService.markRead(conversation);
547					if (query == null) {
548						activateGracePeriod(account);
549					}
550				} else {
551					message.markUnread();
552					notify = true;
553				}
554			}
555
556			if (message.getEncryption() == Message.ENCRYPTION_PGP) {
557				notify = conversation.getAccount().getPgpDecryptionService().decrypt(message, notify);
558			}
559
560			if (query == null) {
561				mXmppConnectionService.updateConversationUi();
562			}
563
564			if (mXmppConnectionService.confirmMessages()
565					&& message.trusted()
566					&& remoteMsgId != null
567					&& !isForwarded
568					&& !isTypeGroupChat) {
569				sendMessageReceipts(account, packet);
570			}
571
572			if (message.getStatus() == Message.STATUS_RECEIVED
573					&& conversation.getOtrSession() != null
574					&& !conversation.getOtrSession().getSessionID().getUserID()
575					.equals(message.getCounterpart().getResourcepart())) {
576				conversation.endOtrIfNeeded();
577			}
578
579			mXmppConnectionService.databaseBackend.createMessage(message);
580			final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
581			if (message.trusted() && message.treatAsDownloadable() != Message.Decision.NEVER && manager.getAutoAcceptFileSize() > 0) {
582				manager.createNewDownloadConnection(message);
583			} else if (notify) {
584				if (query == null) {
585					mXmppConnectionService.getNotificationService().push(message);
586				} else if (query.getWith() == null) { // mam catchup
587					mXmppConnectionService.getNotificationService().pushFromBacklog(message);
588				}
589			}
590		} else if (!packet.hasChild("body")){ //no body
591			Conversation conversation = mXmppConnectionService.find(account, from.toBareJid());
592			if (isTypeGroupChat) {
593				if (packet.hasChild("subject")) {
594					if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
595						conversation.setHasMessagesLeftOnServer(conversation.countMessages() > 0);
596						String subject = packet.findChildContent("subject");
597						conversation.getMucOptions().setSubject(subject);
598						final Bookmark bookmark = conversation.getBookmark();
599						if (bookmark != null && bookmark.getBookmarkName() == null) {
600							if (bookmark.setBookmarkName(subject)) {
601								mXmppConnectionService.pushBookmarks(account);
602							}
603						}
604						mXmppConnectionService.updateConversationUi();
605						return;
606					}
607				}
608			}
609			if (conversation != null && mucUserElement != null && from.isBareJid()) {
610				for (Element child : mucUserElement.getChildren()) {
611					if ("status".equals(child.getName())) {
612						try {
613							int code = Integer.parseInt(child.getAttribute("code"));
614							if ((code >= 170 && code <= 174) || (code >= 102 && code <= 104)) {
615								mXmppConnectionService.fetchConferenceConfiguration(conversation);
616								break;
617							}
618						} catch (Exception e) {
619							//ignored
620						}
621					} else if ("item".equals(child.getName())) {
622						MucOptions.User user = AbstractParser.parseItem(conversation,child);
623						Log.d(Config.LOGTAG,account.getJid()+": changing affiliation for "
624								+user.getRealJid()+" to "+user.getAffiliation()+" in "
625								+conversation.getJid().toBareJid());
626						if (!user.realJidMatchesAccount()) {
627							conversation.getMucOptions().updateUser(user);
628							mXmppConnectionService.getAvatarService().clear(conversation);
629							mXmppConnectionService.updateMucRosterUi();
630							mXmppConnectionService.updateConversationUi();
631							if (!user.getAffiliation().ranks(MucOptions.Affiliation.MEMBER)) {
632								Jid jid = user.getRealJid();
633								List<Jid> cryptoTargets = conversation.getAcceptedCryptoTargets();
634								if (cryptoTargets.remove(user.getRealJid())) {
635									Log.d(Config.LOGTAG,account.getJid().toBareJid()+": removed "+jid+" from crypto targets of "+conversation.getName());
636									conversation.setAcceptedCryptoTargets(cryptoTargets);
637									mXmppConnectionService.updateConversation(conversation);
638								}
639							}
640						}
641					}
642				}
643			}
644		}
645
646
647
648		Element received = packet.findChild("received", "urn:xmpp:chat-markers:0");
649		if (received == null) {
650			received = packet.findChild("received", "urn:xmpp:receipts");
651		}
652		if (received != null && !packet.fromAccount(account)) {
653			mXmppConnectionService.markMessage(account, from.toBareJid(), received.getAttribute("id"), Message.STATUS_SEND_RECEIVED);
654		}
655		Element displayed = packet.findChild("displayed", "urn:xmpp:chat-markers:0");
656		if (displayed != null) {
657			if (packet.fromAccount(account)) {
658				Conversation conversation = mXmppConnectionService.find(account,counterpart.toBareJid());
659				if (conversation != null) {
660					mXmppConnectionService.markRead(conversation);
661				}
662			} else {
663				final Message displayedMessage = mXmppConnectionService.markMessage(account, from.toBareJid(), displayed.getAttribute("id"), Message.STATUS_SEND_DISPLAYED);
664				Message message = displayedMessage == null ? null : displayedMessage.prev();
665				while (message != null
666						&& message.getStatus() == Message.STATUS_SEND_RECEIVED
667						&& message.getTimeSent() < displayedMessage.getTimeSent()) {
668					mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
669					message = message.prev();
670				}
671			}
672		}
673
674		Element event = original.findChild("event", "http://jabber.org/protocol/pubsub#event");
675		if (event != null) {
676			parseEvent(event, original.getFrom(), account);
677		}
678
679		String nick = packet.findChildContent("nick", "http://jabber.org/protocol/nick");
680		if (nick != null) {
681			Contact contact = account.getRoster().getContact(from);
682			contact.setPresenceName(nick);
683		}
684	}
685
686	private static Jid getTrueCounterpart(Element mucUserElement, Jid fallback) {
687		final Element item = mucUserElement == null ? null : mucUserElement.findChild("item");
688		Jid result = item == null ? null : item.getAttributeAsJid("jid");
689		return result != null ? result : fallback;
690	}
691
692	private void sendMessageReceipts(Account account, MessagePacket packet) {
693		ArrayList<String> receiptsNamespaces = new ArrayList<>();
694		if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
695			receiptsNamespaces.add("urn:xmpp:chat-markers:0");
696		}
697		if (packet.hasChild("request", "urn:xmpp:receipts")) {
698			receiptsNamespaces.add("urn:xmpp:receipts");
699		}
700		if (receiptsNamespaces.size() > 0) {
701			MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
702					packet,
703					receiptsNamespaces,
704					packet.getType());
705			mXmppConnectionService.sendMessagePacket(account, receipt);
706		}
707	}
708
709	private static SimpleDateFormat TIME_FORMAT = new SimpleDateFormat("HH:mm:ss");
710
711	private void activateGracePeriod(Account account) {
712		long duration = mXmppConnectionService.getPreferences().getLong("race_period_length", 144) * 1000;
713		Log.d(Config.LOGTAG,account.getJid().toBareJid()+": activating grace period till "+TIME_FORMAT.format(new Date(System.currentTimeMillis() + duration)));
714		account.activateGracePeriod(duration);
715	}
716}