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.xml.Namespace;
 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					&& Namespace.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", Namespace.MAM_LEGACY);
304		if (fin != null) {
305			mXmppConnectionService.getMessageArchiveService().processFinLegacy(fin,original.getFrom());
306			return;
307		}
308		final boolean mamLegacy = original.hasChild("result", Namespace.MAM_LEGACY);
309		final Element result = original.findChild("result",mamLegacy ? Namespace.MAM_LEGACY : Namespace.MAM);
310		final MessageArchiveService.Query query = result == null ? null : mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
311		if (query != null && query.validFrom(original.getFrom())) {
312			Pair<MessagePacket, Long> f = original.getForwardedMessagePacket("result", mamLegacy ? Namespace.MAM_LEGACY : Namespace.MAM);
313			if (f == null) {
314				return;
315			}
316			timestamp = f.second;
317			packet = f.first;
318			isForwarded = true;
319			serverMsgId = result.getAttribute("id");
320			query.incrementMessageCount();
321		} else if (query != null) {
322			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received mam result from invalid sender");
323			return;
324		} else if (original.fromServer(account)) {
325			Pair<MessagePacket, Long> f;
326			f = original.getForwardedMessagePacket("received", "urn:xmpp:carbons:2");
327			f = f == null ? original.getForwardedMessagePacket("sent", "urn:xmpp:carbons:2") : f;
328			packet = f != null ? f.first : original;
329			if (handleErrorMessage(account, packet)) {
330				return;
331			}
332			timestamp = f != null ? f.second : null;
333			isCarbon = f != null;
334			isForwarded = isCarbon;
335		} else {
336			packet = original;
337			isForwarded = false;
338		}
339
340		if (timestamp == null) {
341			timestamp = AbstractParser.parseTimestamp(original,AbstractParser.parseTimestamp(packet));
342		}
343		final String body = packet.getBody();
344		final Element mucUserElement = packet.findChild("x", "http://jabber.org/protocol/muc#user");
345		final String pgpEncrypted = packet.findChildContent("x", "jabber:x:encrypted");
346		final Element replaceElement = packet.findChild("replace", "urn:xmpp:message-correct:0");
347		final Element oob = packet.findChild("x", "jabber:x:oob");
348		final boolean isOob = oob!= null && body != null && body.equals(oob.findChildContent("url"));
349		final String replacementId = replaceElement == null ? null : replaceElement.getAttribute("id");
350		final Element axolotlEncrypted = packet.findChild(XmppAxolotlMessage.CONTAINERTAG, AxolotlService.PEP_PREFIX);
351		int status;
352		final Jid counterpart;
353		final Jid to = packet.getTo();
354		final Jid from = packet.getFrom();
355		final String remoteMsgId = packet.getId();
356		boolean notify = false;
357
358		if (from == null) {
359			Log.d(Config.LOGTAG,"no from in: "+packet.toString());
360			return;
361		}
362		
363		boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
364		boolean isProperlyAddressed = (to != null ) && (!to.isBareJid() || account.countPresences() == 0);
365		boolean isMucStatusMessage = from.isBareJid() && mucUserElement != null && mucUserElement.hasChild("status");
366		if (packet.fromAccount(account)) {
367			status = Message.STATUS_SEND;
368			counterpart = to != null ? to : account.getJid();
369		} else {
370			status = Message.STATUS_RECEIVED;
371			counterpart = from;
372		}
373
374		Invite invite = extractInvite(account, packet);
375		if (invite != null && invite.execute(account)) {
376			return;
377		}
378
379		if (!isTypeGroupChat
380				&& query == null
381				&& extractChatState(mXmppConnectionService.find(account, counterpart.toBareJid()), packet)) {
382			mXmppConnectionService.updateConversationUi();
383		}
384
385		if ((body != null || pgpEncrypted != null || axolotlEncrypted != null) && !isMucStatusMessage) {
386			Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.toBareJid(), isTypeGroupChat, false, query);
387			final boolean conversationMultiMode = conversation.getMode() == Conversation.MODE_MULTI;
388			if (isTypeGroupChat) {
389				if (counterpart.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
390					status = Message.STATUS_SEND_RECEIVED;
391					isCarbon = true; //not really carbon but received from another resource
392					if (mXmppConnectionService.markMessage(conversation, remoteMsgId, status)) {
393						return;
394					} else if (remoteMsgId == null || Config.IGNORE_ID_REWRITE_IN_MUC) {
395						Message message = conversation.findSentMessageWithBody(packet.getBody());
396						if (message != null) {
397							mXmppConnectionService.markMessage(message, status);
398							return;
399						}
400					}
401				} else {
402					status = Message.STATUS_RECEIVED;
403				}
404			}
405			final Message message;
406			if (body != null && body.startsWith("?OTR") && Config.supportOtr()) {
407				if (!isForwarded && !isTypeGroupChat && isProperlyAddressed && !conversationMultiMode) {
408					message = parseOtrChat(body, from, remoteMsgId, conversation);
409					if (message == null) {
410						return;
411					}
412				} else {
413					Log.d(Config.LOGTAG,account.getJid().toBareJid()+": ignoring OTR message from "+from+" isForwarded="+Boolean.toString(isForwarded)+", isProperlyAddressed="+Boolean.valueOf(isProperlyAddressed));
414					message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
415				}
416			} else if (pgpEncrypted != null && Config.supportOpenPgp()) {
417				message = new Message(conversation, pgpEncrypted, Message.ENCRYPTION_PGP, status);
418			} else if (axolotlEncrypted != null && Config.supportOmemo()) {
419				Jid origin;
420				if (conversationMultiMode) {
421					final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
422					origin = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
423					if (origin == null) {
424						Log.d(Config.LOGTAG,"axolotl message in non anonymous conference received");
425						return;
426					}
427				} else {
428					origin = from;
429				}
430				message = parseAxolotlChat(axolotlEncrypted, origin, conversation, status);
431				if (message == null) {
432					return;
433				}
434				if (conversationMultiMode) {
435					message.setTrueCounterpart(origin);
436				}
437			} else {
438				message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
439			}
440
441			if (serverMsgId == null) {
442				final Jid by;
443				final boolean safeToExtract;
444				if (isTypeGroupChat) {
445					by = conversation.getJid().toBareJid();
446					safeToExtract = conversation.getMucOptions().hasFeature(Namespace.STANZA_IDS);
447				} else {
448					by = account.getJid().toBareJid();
449					safeToExtract = account.getXmppConnection().getFeatures().stanzaIds();
450				}
451				if (safeToExtract) {
452					serverMsgId = extractStanzaId(packet, by);
453				}
454			}
455
456			message.setCounterpart(counterpart);
457			message.setRemoteMsgId(remoteMsgId);
458			message.setServerMsgId(serverMsgId);
459			message.setCarbon(isCarbon);
460			message.setTime(timestamp);
461			message.setOob(isOob);
462			message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
463			if (conversationMultiMode) {
464				final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
465				Jid trueCounterpart;
466				if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
467					trueCounterpart = message.getTrueCounterpart();
468				} else if (Config.PARSE_REAL_JID_FROM_MUC_MAM) {
469					trueCounterpart = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
470				} else {
471					trueCounterpart = fallback;
472				}
473				if (trueCounterpart != null && trueCounterpart.toBareJid().equals(account.getJid().toBareJid())) {
474					status = isTypeGroupChat ? Message.STATUS_SEND_RECEIVED : Message.STATUS_SEND;
475				}
476				message.setStatus(status);
477				message.setTrueCounterpart(trueCounterpart);
478				if (!isTypeGroupChat) {
479					message.setType(Message.TYPE_PRIVATE);
480				}
481			} else {
482				updateLastseen(account, from);
483			}
484
485			if (replacementId != null && mXmppConnectionService.allowMessageCorrection()) {
486				Message replacedMessage = conversation.findMessageWithRemoteIdAndCounterpart(replacementId,
487						counterpart,
488						message.getStatus() == Message.STATUS_RECEIVED,
489						message.isCarbon());
490				if (replacedMessage != null) {
491					final boolean fingerprintsMatch = replacedMessage.getFingerprint() == null
492							|| replacedMessage.getFingerprint().equals(message.getFingerprint());
493					final boolean trueCountersMatch = replacedMessage.getTrueCounterpart() != null
494							&& replacedMessage.getTrueCounterpart().equals(message.getTrueCounterpart());
495					final boolean duplicate = conversation.hasDuplicateMessage(message);
496					if (fingerprintsMatch && (trueCountersMatch || !conversationMultiMode) && !duplicate) {
497						Log.d(Config.LOGTAG, "replaced message '" + replacedMessage.getBody() + "' with '" + message.getBody() + "'");
498						synchronized (replacedMessage) {
499							final String uuid = replacedMessage.getUuid();
500							replacedMessage.setUuid(UUID.randomUUID().toString());
501							replacedMessage.setBody(message.getBody());
502							replacedMessage.setEdited(replacedMessage.getRemoteMsgId());
503							replacedMessage.setRemoteMsgId(remoteMsgId);
504							replacedMessage.setEncryption(message.getEncryption());
505							if (replacedMessage.getStatus() == Message.STATUS_RECEIVED) {
506								replacedMessage.markUnread();
507							}
508							mXmppConnectionService.updateMessage(replacedMessage, uuid);
509							mXmppConnectionService.getNotificationService().updateNotification(false);
510							if (mXmppConnectionService.confirmMessages()
511									&& (replacedMessage.trusted() || replacedMessage.getType() == Message.TYPE_PRIVATE)
512									&& remoteMsgId != null
513									&& !isForwarded
514									&& !isTypeGroupChat) {
515								sendMessageReceipts(account, packet);
516							}
517							if (replacedMessage.getEncryption() == Message.ENCRYPTION_PGP) {
518								conversation.getAccount().getPgpDecryptionService().discard(replacedMessage);
519								conversation.getAccount().getPgpDecryptionService().decrypt(replacedMessage, false);
520							}
521						}
522						return;
523					} else {
524						Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received message correction but verification didn't check out");
525					}
526				}
527			}
528
529			long deletionDate = mXmppConnectionService.getAutomaticMessageDeletionDate();
530			if (deletionDate != 0 && message.getTimeSent() < deletionDate) {
531				Log.d(Config.LOGTAG,account.getJid().toBareJid()+": skipping message from "+message.getCounterpart().toString()+" because it was sent prior to our deletion date");
532				return;
533			}
534
535			boolean checkForDuplicates = query != null
536					|| (isTypeGroupChat && packet.hasChild("delay","urn:xmpp:delay"))
537					|| message.getType() == Message.TYPE_PRIVATE;
538			if (checkForDuplicates && conversation.hasDuplicateMessage(message)) {
539				Log.d(Config.LOGTAG,"skipping duplicate message from "+message.getCounterpart().toString()+" "+message.getBody());
540				return;
541			}
542
543			if (query != null && query.getPagingOrder() == MessageArchiveService.PagingOrder.REVERSE) {
544				conversation.prepend(message);
545			} else {
546				conversation.add(message);
547			}
548			if (query != null) {
549				query.incrementActualMessageCount();
550			}
551
552			if (query == null || query.isCatchup()) { //either no mam or catchup
553				if (status == Message.STATUS_SEND || status == Message.STATUS_SEND_RECEIVED) {
554					mXmppConnectionService.markRead(conversation);
555					if (query == null) {
556						activateGracePeriod(account);
557					}
558				} else {
559					message.markUnread();
560					notify = true;
561				}
562			}
563
564			if (message.getEncryption() == Message.ENCRYPTION_PGP) {
565				notify = conversation.getAccount().getPgpDecryptionService().decrypt(message, notify);
566			}
567
568			if (query == null) {
569				mXmppConnectionService.updateConversationUi();
570			}
571
572			if (mXmppConnectionService.confirmMessages()
573					&& (message.trusted() || message.getType() == Message.TYPE_PRIVATE)
574					&& remoteMsgId != null
575					&& !isForwarded
576					&& !isTypeGroupChat) {
577				sendMessageReceipts(account, packet);
578			}
579
580			if (message.getStatus() == Message.STATUS_RECEIVED
581					&& conversation.getOtrSession() != null
582					&& !conversation.getOtrSession().getSessionID().getUserID()
583					.equals(message.getCounterpart().getResourcepart())) {
584				conversation.endOtrIfNeeded();
585			}
586
587			mXmppConnectionService.databaseBackend.createMessage(message);
588			final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
589			if (message.trusted() && message.treatAsDownloadable() != Message.Decision.NEVER && manager.getAutoAcceptFileSize() > 0) {
590				manager.createNewDownloadConnection(message);
591			} else if (notify) {
592				if (query == null) {
593					mXmppConnectionService.getNotificationService().push(message);
594				} else if (query.isCatchup()) { // mam catchup
595					mXmppConnectionService.getNotificationService().pushFromBacklog(message);
596				}
597			}
598		} else if (!packet.hasChild("body")){ //no body
599			Conversation conversation = mXmppConnectionService.find(account, from.toBareJid());
600			if (isTypeGroupChat) {
601				if (packet.hasChild("subject")) {
602					if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
603						conversation.setHasMessagesLeftOnServer(conversation.countMessages() > 0);
604						String subject = packet.findChildContent("subject");
605						conversation.getMucOptions().setSubject(subject);
606						final Bookmark bookmark = conversation.getBookmark();
607						if (bookmark != null && bookmark.getBookmarkName() == null) {
608							if (bookmark.setBookmarkName(subject)) {
609								mXmppConnectionService.pushBookmarks(account);
610							}
611						}
612						mXmppConnectionService.updateConversationUi();
613						return;
614					}
615				}
616			}
617			if (conversation != null && mucUserElement != null && from.isBareJid()) {
618				for (Element child : mucUserElement.getChildren()) {
619					if ("status".equals(child.getName())) {
620						try {
621							int code = Integer.parseInt(child.getAttribute("code"));
622							if ((code >= 170 && code <= 174) || (code >= 102 && code <= 104)) {
623								mXmppConnectionService.fetchConferenceConfiguration(conversation);
624								break;
625							}
626						} catch (Exception e) {
627							//ignored
628						}
629					} else if ("item".equals(child.getName())) {
630						MucOptions.User user = AbstractParser.parseItem(conversation,child);
631						Log.d(Config.LOGTAG,account.getJid()+": changing affiliation for "
632								+user.getRealJid()+" to "+user.getAffiliation()+" in "
633								+conversation.getJid().toBareJid());
634						if (!user.realJidMatchesAccount()) {
635							conversation.getMucOptions().updateUser(user);
636							mXmppConnectionService.getAvatarService().clear(conversation);
637							mXmppConnectionService.updateMucRosterUi();
638							mXmppConnectionService.updateConversationUi();
639							if (!user.getAffiliation().ranks(MucOptions.Affiliation.MEMBER)) {
640								Jid jid = user.getRealJid();
641								List<Jid> cryptoTargets = conversation.getAcceptedCryptoTargets();
642								if (cryptoTargets.remove(user.getRealJid())) {
643									Log.d(Config.LOGTAG,account.getJid().toBareJid()+": removed "+jid+" from crypto targets of "+conversation.getName());
644									conversation.setAcceptedCryptoTargets(cryptoTargets);
645									mXmppConnectionService.updateConversation(conversation);
646								}
647							}
648						}
649					}
650				}
651			}
652		}
653
654
655
656		Element received = packet.findChild("received", "urn:xmpp:chat-markers:0");
657		if (received == null) {
658			received = packet.findChild("received", "urn:xmpp:receipts");
659		}
660		if (received != null && !packet.fromAccount(account)) {
661			mXmppConnectionService.markMessage(account, from.toBareJid(), received.getAttribute("id"), Message.STATUS_SEND_RECEIVED);
662		}
663		Element displayed = packet.findChild("displayed", "urn:xmpp:chat-markers:0");
664		if (displayed != null) {
665			if (packet.fromAccount(account)) {
666				Conversation conversation = mXmppConnectionService.find(account,counterpart.toBareJid());
667				if (conversation != null) {
668					mXmppConnectionService.markRead(conversation);
669				}
670			} else {
671				final Message displayedMessage = mXmppConnectionService.markMessage(account, from.toBareJid(), displayed.getAttribute("id"), Message.STATUS_SEND_DISPLAYED);
672				Message message = displayedMessage == null ? null : displayedMessage.prev();
673				while (message != null
674						&& message.getStatus() == Message.STATUS_SEND_RECEIVED
675						&& message.getTimeSent() < displayedMessage.getTimeSent()) {
676					mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
677					message = message.prev();
678				}
679			}
680		}
681
682		Element event = original.findChild("event", "http://jabber.org/protocol/pubsub#event");
683		if (event != null) {
684			parseEvent(event, original.getFrom(), account);
685		}
686
687		String nick = packet.findChildContent("nick", "http://jabber.org/protocol/nick");
688		if (nick != null) {
689			Contact contact = account.getRoster().getContact(from);
690			contact.setPresenceName(nick);
691		}
692	}
693
694	private static Jid getTrueCounterpart(Element mucUserElement, Jid fallback) {
695		final Element item = mucUserElement == null ? null : mucUserElement.findChild("item");
696		Jid result = item == null ? null : item.getAttributeAsJid("jid");
697		return result != null ? result : fallback;
698	}
699
700	private void sendMessageReceipts(Account account, MessagePacket packet) {
701		ArrayList<String> receiptsNamespaces = new ArrayList<>();
702		if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
703			receiptsNamespaces.add("urn:xmpp:chat-markers:0");
704		}
705		if (packet.hasChild("request", "urn:xmpp:receipts")) {
706			receiptsNamespaces.add("urn:xmpp:receipts");
707		}
708		if (receiptsNamespaces.size() > 0) {
709			MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
710					packet,
711					receiptsNamespaces,
712					packet.getType());
713			mXmppConnectionService.sendMessagePacket(account, receipt);
714		}
715	}
716
717	private static SimpleDateFormat TIME_FORMAT = new SimpleDateFormat("HH:mm:ss");
718
719	private void activateGracePeriod(Account account) {
720		long duration = mXmppConnectionService.getPreferences().getLong("race_period_length", 144) * 1000;
721		Log.d(Config.LOGTAG,account.getJid().toBareJid()+": activating grace period till "+TIME_FORMAT.format(new Date(System.currentTimeMillis() + duration)));
722		account.activateGracePeriod(duration);
723	}
724}