1package eu.siacs.conversations.parser;
  2
  3import android.util.Log;
  4import android.util.Pair;
  5
  6import java.text.SimpleDateFormat;
  7import java.util.ArrayList;
  8import java.util.Arrays;
  9import java.util.Date;
 10import java.util.List;
 11import java.util.Locale;
 12import java.util.Set;
 13import java.util.UUID;
 14
 15import eu.siacs.conversations.Config;
 16import eu.siacs.conversations.R;
 17import eu.siacs.conversations.crypto.axolotl.AxolotlService;
 18import eu.siacs.conversations.crypto.axolotl.XmppAxolotlMessage;
 19import eu.siacs.conversations.entities.Account;
 20import eu.siacs.conversations.entities.Bookmark;
 21import eu.siacs.conversations.entities.Contact;
 22import eu.siacs.conversations.entities.Conversation;
 23import eu.siacs.conversations.entities.Message;
 24import eu.siacs.conversations.entities.MucOptions;
 25import eu.siacs.conversations.entities.ReadByMarker;
 26import eu.siacs.conversations.entities.ReceiptRequest;
 27import eu.siacs.conversations.http.HttpConnectionManager;
 28import eu.siacs.conversations.services.MessageArchiveService;
 29import eu.siacs.conversations.services.XmppConnectionService;
 30import eu.siacs.conversations.utils.CryptoHelper;
 31import eu.siacs.conversations.xml.Namespace;
 32import eu.siacs.conversations.xml.Element;
 33import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
 34import eu.siacs.conversations.xmpp.chatstate.ChatState;
 35import eu.siacs.conversations.xmpp.pep.Avatar;
 36import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
 37import rocks.xmpp.addr.Jid;
 38
 39public class MessageParser extends AbstractParser implements OnMessagePacketReceived {
 40
 41	public MessageParser(XmppConnectionService service) {
 42		super(service);
 43	}
 44
 45	private boolean extractChatState(Conversation c, final boolean isTypeGroupChat, final MessagePacket packet) {
 46		ChatState state = ChatState.parse(packet);
 47		if (state != null && c != null) {
 48			final Account account = c.getAccount();
 49			Jid from = packet.getFrom();
 50			if (from.asBareJid().equals(account.getJid().asBareJid())) {
 51				c.setOutgoingChatState(state);
 52				if (state == ChatState.ACTIVE || state == ChatState.COMPOSING) {
 53					mXmppConnectionService.markRead(c);
 54					activateGracePeriod(account);
 55				}
 56				return false;
 57			} else {
 58				if (isTypeGroupChat) {
 59					MucOptions.User user = c.getMucOptions().findUserByFullJid(from);
 60					if (user != null) {
 61						return user.setChatState(state);
 62					} else {
 63						return false;
 64					}
 65				} else {
 66					return c.setIncomingChatState(state);
 67				}
 68			}
 69		}
 70		return false;
 71	}
 72
 73	private Message parseAxolotlChat(Element axolotlMessage, Jid from, Conversation conversation, int status, boolean postpone) {
 74		final AxolotlService service = conversation.getAccount().getAxolotlService();
 75		final XmppAxolotlMessage xmppAxolotlMessage;
 76		try {
 77			xmppAxolotlMessage = XmppAxolotlMessage.fromElement(axolotlMessage, from.asBareJid());
 78		} catch (Exception e) {
 79			Log.d(Config.LOGTAG, conversation.getAccount().getJid().asBareJid() + ": invalid omemo message received " + e.getMessage());
 80			return null;
 81		}
 82		if (xmppAxolotlMessage.hasPayload()) {
 83			final XmppAxolotlMessage.XmppAxolotlPlaintextMessage plaintextMessage = service.processReceivingPayloadMessage(xmppAxolotlMessage, postpone);
 84			if (plaintextMessage != null) {
 85				Message finishedMessage = new Message(conversation, plaintextMessage.getPlaintext(), Message.ENCRYPTION_AXOLOTL, status);
 86				finishedMessage.setFingerprint(plaintextMessage.getFingerprint());
 87				Log.d(Config.LOGTAG, AxolotlService.getLogprefix(finishedMessage.getConversation().getAccount()) + " Received Message with session fingerprint: " + plaintextMessage.getFingerprint());
 88				return finishedMessage;
 89			}
 90		} else {
 91			Log.d(Config.LOGTAG,conversation.getAccount().getJid().asBareJid()+": received OMEMO key transport message");
 92			service.processReceivingKeyTransportMessage(xmppAxolotlMessage, postpone);
 93		}
 94		return null;
 95	}
 96
 97	private class Invite {
 98		final Jid jid;
 99		final String password;
100		final Contact inviter;
101
102		Invite(Jid jid, String password, Contact inviter) {
103			this.jid = jid;
104			this.password = password;
105			this.inviter = inviter;
106		}
107
108		public boolean execute(Account account) {
109			if (jid != null) {
110				Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, jid, true, false);
111				if (!conversation.getMucOptions().online()) {
112					conversation.getMucOptions().setPassword(password);
113					mXmppConnectionService.databaseBackend.updateConversation(conversation);
114					mXmppConnectionService.joinMuc(conversation, inviter != null && inviter.mutualPresenceSubscription());
115					mXmppConnectionService.updateConversationUi();
116				}
117				return true;
118			}
119			return false;
120		}
121	}
122
123	private Invite extractInvite(Account account, Element message) {
124		Element x = message.findChild("x", "http://jabber.org/protocol/muc#user");
125		if (x != null) {
126			Element invite = x.findChild("invite");
127			if (invite != null) {
128				Element pw = x.findChild("password");
129				Jid from = invite.getAttributeAsJid("from");
130				Contact contact = from == null ? null : account.getRoster().getContact(from);
131				return new Invite(message.getAttributeAsJid("from"), pw != null ? pw.getContent() : null, contact);
132			}
133		} else {
134			x = message.findChild("x", "jabber:x:conference");
135			if (x != null) {
136				Jid from = message.getAttributeAsJid("from");
137				Contact contact = from == null ? null : account.getRoster().getContact(from);
138				return new Invite(x.getAttributeAsJid("jid"), x.getAttribute("password"), contact);
139			}
140		}
141		return null;
142	}
143
144	private static String extractStanzaId(Element packet, boolean isTypeGroupChat, Conversation conversation) {
145		final Jid by;
146		final boolean safeToExtract;
147		if (isTypeGroupChat) {
148			by = conversation.getJid().asBareJid();
149			safeToExtract = conversation.getMucOptions().hasFeature(Namespace.STANZA_IDS);
150		} else {
151			Account account = conversation.getAccount();
152			by = account.getJid().asBareJid();
153			safeToExtract = account.getXmppConnection().getFeatures().stanzaIds();
154		}
155		return safeToExtract ? extractStanzaId(packet, by) : null;
156	}
157
158	private static String extractStanzaId(Element packet, Jid by) {
159		for (Element child : packet.getChildren()) {
160			if (child.getName().equals("stanza-id")
161					&& Namespace.STANZA_IDS.equals(child.getNamespace())
162					&& by.equals(child.getAttributeAsJid("by"))) {
163				return child.getAttribute("id");
164			}
165		}
166		return null;
167	}
168
169	private void parseEvent(final Element event, final Jid from, final Account account) {
170		Element items = event.findChild("items");
171		String node = items == null ? null : items.getAttribute("node");
172		if ("urn:xmpp:avatar:metadata".equals(node)) {
173			Avatar avatar = Avatar.parseMetadata(items);
174			if (avatar != null) {
175				avatar.owner = from.asBareJid();
176				if (mXmppConnectionService.getFileBackend().isAvatarCached(avatar)) {
177					if (account.getJid().asBareJid().equals(from)) {
178						if (account.setAvatar(avatar.getFilename())) {
179							mXmppConnectionService.databaseBackend.updateAccount(account);
180						}
181						mXmppConnectionService.getAvatarService().clear(account);
182						mXmppConnectionService.updateConversationUi();
183						mXmppConnectionService.updateAccountUi();
184					} else {
185						Contact contact = account.getRoster().getContact(from);
186						contact.setAvatar(avatar);
187						mXmppConnectionService.getAvatarService().clear(contact);
188						mXmppConnectionService.updateConversationUi();
189						mXmppConnectionService.updateRosterUi();
190					}
191				} else if (mXmppConnectionService.isDataSaverDisabled()) {
192					mXmppConnectionService.fetchAvatar(account, avatar);
193				}
194			}
195		} else if ("http://jabber.org/protocol/nick".equals(node)) {
196			final Element i = items.findChild("item");
197			final String nick = i == null ? null : i.findChildContent("nick", Namespace.NICK);
198			if (nick != null) {
199				Contact contact = account.getRoster().getContact(from);
200				if (contact.setPresenceName(nick)) {
201					mXmppConnectionService.getAvatarService().clear(contact);
202				}
203				mXmppConnectionService.updateConversationUi();
204				mXmppConnectionService.updateAccountUi();
205			}
206		} else if (AxolotlService.PEP_DEVICE_LIST.equals(node)) {
207			Element item = items.findChild("item");
208			Set<Integer> deviceIds = mXmppConnectionService.getIqParser().deviceIds(item);
209			Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Received PEP device list " + deviceIds + " update from " + from + ", processing... ");
210			AxolotlService axolotlService = account.getAxolotlService();
211			axolotlService.registerDevices(from, deviceIds);
212			mXmppConnectionService.updateAccountUi();
213		}
214	}
215
216	private boolean handleErrorMessage(Account account, MessagePacket packet) {
217		if (packet.getType() == MessagePacket.TYPE_ERROR) {
218			Jid from = packet.getFrom();
219			if (from != null) {
220				Message message = mXmppConnectionService.markMessage(account,
221						from.asBareJid(),
222						packet.getId(),
223						Message.STATUS_SEND_FAILED,
224						extractErrorMessage(packet));
225			}
226			return true;
227		}
228		return false;
229	}
230
231	@Override
232	public void onMessagePacketReceived(Account account, MessagePacket original) {
233		if (handleErrorMessage(account, original)) {
234			return;
235		}
236		final MessagePacket packet;
237		Long timestamp = null;
238		boolean isCarbon = false;
239		String serverMsgId = null;
240		final Element fin = original.findChild("fin", Namespace.MAM_LEGACY);
241		if (fin != null) {
242			mXmppConnectionService.getMessageArchiveService().processFinLegacy(fin, original.getFrom());
243			return;
244		}
245		final boolean mamLegacy = original.hasChild("result", Namespace.MAM_LEGACY);
246		final Element result = original.findChild("result", mamLegacy ? Namespace.MAM_LEGACY : Namespace.MAM);
247		final MessageArchiveService.Query query = result == null ? null : mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
248		if (query != null && query.validFrom(original.getFrom())) {
249			Pair<MessagePacket, Long> f = original.getForwardedMessagePacket("result", mamLegacy ? Namespace.MAM_LEGACY : Namespace.MAM);
250			if (f == null) {
251				return;
252			}
253			timestamp = f.second;
254			packet = f.first;
255			serverMsgId = result.getAttribute("id");
256			query.incrementMessageCount();
257		} else if (query != null) {
258			Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received mam result from invalid sender");
259			return;
260		} else if (original.fromServer(account)) {
261			Pair<MessagePacket, Long> f;
262			f = original.getForwardedMessagePacket("received", "urn:xmpp:carbons:2");
263			f = f == null ? original.getForwardedMessagePacket("sent", "urn:xmpp:carbons:2") : f;
264			packet = f != null ? f.first : original;
265			if (handleErrorMessage(account, packet)) {
266				return;
267			}
268			timestamp = f != null ? f.second : null;
269			isCarbon = f != null;
270		} else {
271			packet = original;
272		}
273
274		if (timestamp == null) {
275			timestamp = AbstractParser.parseTimestamp(original, AbstractParser.parseTimestamp(packet));
276		}
277		final String body = packet.getBody();
278		final Element mucUserElement = packet.findChild("x", "http://jabber.org/protocol/muc#user");
279		final String pgpEncrypted = packet.findChildContent("x", "jabber:x:encrypted");
280		final Element replaceElement = packet.findChild("replace", "urn:xmpp:message-correct:0");
281		final Element oob = packet.findChild("x", Namespace.OOB);
282		final String oobUrl = oob != null ? oob.findChildContent("url") : null;
283		final String replacementId = replaceElement == null ? null : replaceElement.getAttribute("id");
284		final Element axolotlEncrypted = packet.findChild(XmppAxolotlMessage.CONTAINERTAG, AxolotlService.PEP_PREFIX);
285		int status;
286		final Jid counterpart;
287		final Jid to = packet.getTo();
288		final Jid from = packet.getFrom();
289		final Element originId = packet.findChild("origin-id", Namespace.STANZA_IDS);
290		final String remoteMsgId;
291		if (originId != null && originId.getAttribute("id") != null) {
292			remoteMsgId = originId.getAttribute("id");
293		} else {
294			remoteMsgId = packet.getId();
295		}
296		boolean notify = false;
297
298		if (from == null) {
299			Log.d(Config.LOGTAG, "no from in: " + packet.toString());
300			return;
301		}
302
303		boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
304		if (query != null && !query.muc() && isTypeGroupChat) {
305			Log.e(Config.LOGTAG,account.getJid().asBareJid()+": received groupchat ("+from+") message on regular MAM request. skipping");
306			return;
307		}
308		boolean isMucStatusMessage = from.isBareJid() && mucUserElement != null && mucUserElement.hasChild("status");
309		boolean selfAddressed;
310		if (packet.fromAccount(account)) {
311			status = Message.STATUS_SEND;
312			selfAddressed = to == null || account.getJid().asBareJid().equals(to.asBareJid());
313			if (selfAddressed) {
314				counterpart = from;
315			} else {
316				counterpart = to != null ? to : account.getJid();
317			}
318		} else {
319			status = Message.STATUS_RECEIVED;
320			counterpart = from;
321			selfAddressed = false;
322		}
323
324		Invite invite = extractInvite(account, packet);
325		if (invite != null && invite.execute(account)) {
326			return;
327		}
328
329		if ((body != null || pgpEncrypted != null || (axolotlEncrypted != null && axolotlEncrypted.hasChild("payload")) || oobUrl != null) && !isMucStatusMessage) {
330			final boolean conversationIsProbablyMuc = isTypeGroupChat || mucUserElement != null || account.getXmppConnection().getMucServers().contains(counterpart.getDomain());
331			final Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.asBareJid(), conversationIsProbablyMuc, false, query, false);
332			final boolean conversationMultiMode = conversation.getMode() == Conversation.MODE_MULTI;
333
334			if (serverMsgId == null) {
335				serverMsgId = extractStanzaId(packet, isTypeGroupChat, conversation);
336			}
337
338
339			if (selfAddressed) {
340				if (mXmppConnectionService.markMessage(conversation, remoteMsgId, Message.STATUS_SEND_RECEIVED, serverMsgId)) {
341					return;
342				}
343				status = Message.STATUS_RECEIVED;
344				if (remoteMsgId != null && conversation.findMessageWithRemoteId(remoteMsgId,counterpart) != null) {
345					return;
346				}
347			}
348
349			if (isTypeGroupChat) {
350				if (conversation.getMucOptions().isSelf(counterpart)) {
351					status = Message.STATUS_SEND_RECEIVED;
352					isCarbon = true; //not really carbon but received from another resource
353					if (mXmppConnectionService.markMessage(conversation, remoteMsgId, status, serverMsgId)) {
354						return;
355					} else if (remoteMsgId == null || Config.IGNORE_ID_REWRITE_IN_MUC) {
356						Message message = conversation.findSentMessageWithBody(packet.getBody());
357						if (message != null) {
358							mXmppConnectionService.markMessage(message, status);
359							return;
360						}
361					}
362				} else {
363					status = Message.STATUS_RECEIVED;
364				}
365			}
366			final Message message;
367			if (pgpEncrypted != null && Config.supportOpenPgp()) {
368				message = new Message(conversation, pgpEncrypted, Message.ENCRYPTION_PGP, status);
369			} else if (axolotlEncrypted != null && Config.supportOmemo()) {
370				Jid origin;
371				if (conversationMultiMode) {
372					final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
373					origin = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
374					if (origin == null) {
375						Log.d(Config.LOGTAG, "axolotl message in non anonymous conference received");
376						return;
377					}
378				} else {
379					origin = from;
380				}
381				message = parseAxolotlChat(axolotlEncrypted, origin, conversation, status, query != null);
382				if (message == null) {
383					if (query == null &&  extractChatState(mXmppConnectionService.find(account, counterpart.asBareJid()), isTypeGroupChat, packet)) {
384						mXmppConnectionService.updateConversationUi();
385					}
386					if (query != null && status == Message.STATUS_SEND && remoteMsgId != null) {
387						Message previouslySent = conversation.findSentMessageWithUuid(remoteMsgId);
388						if (previouslySent != null && previouslySent.getServerMsgId() == null && serverMsgId != null) {
389							previouslySent.setServerMsgId(serverMsgId);
390							mXmppConnectionService.databaseBackend.updateMessage(previouslySent);
391							Log.d(Config.LOGTAG,account.getJid().asBareJid()+": encountered previously sent OMEMO message without serverId. updating...");
392						}
393					}
394					return;
395				}
396				if (conversationMultiMode) {
397					message.setTrueCounterpart(origin);
398				}
399			} else if (body == null && oobUrl != null) {
400				message = new Message(conversation, oobUrl, Message.ENCRYPTION_NONE, status);
401				message.setOob(true);
402				if (CryptoHelper.isPgpEncryptedUrl(oobUrl)) {
403					message.setEncryption(Message.ENCRYPTION_DECRYPTED);
404				}
405			} else {
406				message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
407			}
408
409			message.setCounterpart(counterpart);
410			message.setRemoteMsgId(remoteMsgId);
411			message.setServerMsgId(serverMsgId);
412			message.setCarbon(isCarbon);
413			message.setTime(timestamp);
414			if (body != null && body.equals(oobUrl)) {
415				message.setOob(true);
416				if (CryptoHelper.isPgpEncryptedUrl(oobUrl)) {
417					message.setEncryption(Message.ENCRYPTION_DECRYPTED);
418				}
419			}
420			message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
421			if (conversationMultiMode) {
422				final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
423				Jid trueCounterpart;
424				if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
425					trueCounterpart = message.getTrueCounterpart();
426				} else if (query != null && query.safeToExtractTrueCounterpart()) {
427					trueCounterpart = getTrueCounterpart(mucUserElement, fallback);
428				} else {
429					trueCounterpart = fallback;
430				}
431				if (trueCounterpart != null && trueCounterpart.asBareJid().equals(account.getJid().asBareJid())) {
432					status = isTypeGroupChat ? Message.STATUS_SEND_RECEIVED : Message.STATUS_SEND;
433				}
434				message.setStatus(status);
435				message.setTrueCounterpart(trueCounterpart);
436				if (!isTypeGroupChat) {
437					message.setType(Message.TYPE_PRIVATE);
438				}
439			} else {
440				updateLastseen(account, from);
441			}
442
443			if (replacementId != null && mXmppConnectionService.allowMessageCorrection()) {
444				final Message replacedMessage = conversation.findMessageWithRemoteIdAndCounterpart(replacementId,
445						counterpart,
446						message.getStatus() == Message.STATUS_RECEIVED,
447						message.isCarbon());
448				if (replacedMessage != null) {
449					final boolean fingerprintsMatch = replacedMessage.getFingerprint() == null
450							|| replacedMessage.getFingerprint().equals(message.getFingerprint());
451					final boolean trueCountersMatch = replacedMessage.getTrueCounterpart() != null
452							&& replacedMessage.getTrueCounterpart().equals(message.getTrueCounterpart());
453					final boolean duplicate = conversation.hasDuplicateMessage(message);
454					if (fingerprintsMatch && (trueCountersMatch || !conversationMultiMode) && !duplicate) {
455						Log.d(Config.LOGTAG, "replaced message '" + replacedMessage.getBody() + "' with '" + message.getBody() + "'");
456						synchronized (replacedMessage) {
457							final String uuid = replacedMessage.getUuid();
458							replacedMessage.setUuid(UUID.randomUUID().toString());
459							replacedMessage.setBody(message.getBody());
460							replacedMessage.setEdited(replacedMessage.getRemoteMsgId());
461							replacedMessage.setRemoteMsgId(remoteMsgId);
462							if (replacedMessage.getServerMsgId() == null || message.getServerMsgId() != null) {
463								replacedMessage.setServerMsgId(message.getServerMsgId());
464							}
465							replacedMessage.setEncryption(message.getEncryption());
466							if (replacedMessage.getStatus() == Message.STATUS_RECEIVED) {
467								replacedMessage.markUnread();
468							}
469							extractChatState(mXmppConnectionService.find(account, counterpart.asBareJid()), isTypeGroupChat, packet);
470							mXmppConnectionService.updateMessage(replacedMessage, uuid);
471							mXmppConnectionService.getNotificationService().updateNotification(false);
472							if (mXmppConnectionService.confirmMessages()
473									&& replacedMessage.getStatus() == Message.STATUS_RECEIVED
474									&& (replacedMessage.trusted() || replacedMessage.getType() == Message.TYPE_PRIVATE)
475									&& remoteMsgId != null
476									&& !selfAddressed
477									&& !isTypeGroupChat) {
478								processMessageReceipts(account, packet, query);
479							}
480							if (replacedMessage.getEncryption() == Message.ENCRYPTION_PGP) {
481								conversation.getAccount().getPgpDecryptionService().discard(replacedMessage);
482								conversation.getAccount().getPgpDecryptionService().decrypt(replacedMessage, false);
483							}
484						}
485						return;
486					} else {
487						Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received message correction but verification didn't check out");
488					}
489				}
490			}
491
492			long deletionDate = mXmppConnectionService.getAutomaticMessageDeletionDate();
493			if (deletionDate != 0 && message.getTimeSent() < deletionDate) {
494				Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": skipping message from " + message.getCounterpart().toString() + " because it was sent prior to our deletion date");
495				return;
496			}
497
498			boolean checkForDuplicates = (isTypeGroupChat && packet.hasChild("delay", "urn:xmpp:delay"))
499					|| message.getType() == Message.TYPE_PRIVATE
500					|| message.getServerMsgId() != null;
501			if (checkForDuplicates ) {
502				final Message duplicate = conversation.findDuplicateMessage(message);
503				if (duplicate != null) {
504					final boolean serverMsgIdUpdated;
505					if (duplicate.getStatus() != Message.STATUS_RECEIVED
506							&& duplicate.getUuid().equals(message.getRemoteMsgId())
507							&& duplicate.getServerMsgId() == null
508							&& message.getServerMsgId() != null) {
509						duplicate.setServerMsgId(message.getServerMsgId());
510						mXmppConnectionService.databaseBackend.updateMessage(message);
511						serverMsgIdUpdated = true;
512					} else {
513						serverMsgIdUpdated = false;
514					}
515					Log.d(Config.LOGTAG, "skipping duplicate message with " + message.getCounterpart()+". serverMsgIdUpdated="+Boolean.toString(serverMsgIdUpdated));
516					return;
517				}
518			}
519
520			if (query != null && query.getPagingOrder() == MessageArchiveService.PagingOrder.REVERSE) {
521				conversation.prepend(query.getActualInThisQuery(),message);
522			} else {
523				conversation.add(message);
524			}
525			if (query != null) {
526				query.incrementActualMessageCount();
527			}
528
529			if (query == null || query.isCatchup()) { //either no mam or catchup
530				if (status == Message.STATUS_SEND || status == Message.STATUS_SEND_RECEIVED) {
531					mXmppConnectionService.markRead(conversation);
532					if (query == null) {
533						activateGracePeriod(account);
534					}
535				} else {
536					message.markUnread();
537					notify = true;
538				}
539			}
540
541			if (message.getEncryption() == Message.ENCRYPTION_PGP) {
542				notify = conversation.getAccount().getPgpDecryptionService().decrypt(message, notify);
543			}
544
545			if (query == null) {
546				extractChatState(mXmppConnectionService.find(account, counterpart.asBareJid()), isTypeGroupChat, packet);
547				mXmppConnectionService.updateConversationUi();
548			}
549
550			if (mXmppConnectionService.confirmMessages()
551					&& message.getStatus() == Message.STATUS_RECEIVED
552					&& (message.trusted() || message.getType() == Message.TYPE_PRIVATE)
553					&& remoteMsgId != null
554					&& !selfAddressed
555					&& !isTypeGroupChat) {
556				processMessageReceipts(account, packet, query);
557			}
558
559			mXmppConnectionService.databaseBackend.createMessage(message);
560			final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
561			if (message.trusted() && message.treatAsDownloadable() && manager.getAutoAcceptFileSize() > 0) {
562				manager.createNewDownloadConnection(message);
563			} else if (notify) {
564				if (query != null && query.isCatchup()) {
565					mXmppConnectionService.getNotificationService().pushFromBacklog(message);
566				} else {
567					mXmppConnectionService.getNotificationService().push(message);
568				}
569			}
570		} else if (!packet.hasChild("body")) { //no body
571
572			final Conversation conversation = mXmppConnectionService.find(account, from.asBareJid());
573			if (axolotlEncrypted != null) {
574				Jid origin;
575				if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
576					final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
577					origin = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
578					if (origin == null) {
579						Log.d(Config.LOGTAG, "omemo key transport message in non anonymous conference received");
580						return;
581					}
582				} else if (isTypeGroupChat) {
583					return;
584				} else {
585					origin = from;
586				}
587				try {
588					final XmppAxolotlMessage xmppAxolotlMessage = XmppAxolotlMessage.fromElement(axolotlEncrypted, origin.asBareJid());
589					account.getAxolotlService().processReceivingKeyTransportMessage(xmppAxolotlMessage, query != null);
590					Log.d(Config.LOGTAG,account.getJid().asBareJid()+": omemo key transport message received from "+origin);
591				} catch (Exception e) {
592					Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": invalid omemo key transport message received " + e.getMessage());
593					return;
594				}
595			}
596
597			if (query == null && extractChatState(mXmppConnectionService.find(account, counterpart.asBareJid()), isTypeGroupChat, packet)) {
598				mXmppConnectionService.updateConversationUi();
599			}
600
601			if (isTypeGroupChat) {
602				if (packet.hasChild("subject")) {
603					if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
604						conversation.setHasMessagesLeftOnServer(conversation.countMessages() > 0);
605						String subject = packet.findInternationalizedChildContent("subject");
606						if (conversation.getMucOptions().setSubject(subject)) {
607							mXmppConnectionService.updateConversation(conversation);
608						}
609						final Bookmark bookmark = conversation.getBookmark();
610						if (bookmark != null && bookmark.getBookmarkName() == null) {
611							if (bookmark.setBookmarkName(subject)) {
612								mXmppConnectionService.pushBookmarks(account);
613							}
614						}
615						mXmppConnectionService.updateConversationUi();
616						return;
617					}
618				}
619			}
620			if (conversation != null && mucUserElement != null && from.isBareJid()) {
621				for (Element child : mucUserElement.getChildren()) {
622					if ("status".equals(child.getName())) {
623						try {
624							int code = Integer.parseInt(child.getAttribute("code"));
625							if ((code >= 170 && code <= 174) || (code >= 102 && code <= 104)) {
626								mXmppConnectionService.fetchConferenceConfiguration(conversation);
627								break;
628							}
629						} catch (Exception e) {
630							//ignored
631						}
632					} else if ("item".equals(child.getName())) {
633						MucOptions.User user = AbstractParser.parseItem(conversation, child);
634						Log.d(Config.LOGTAG, account.getJid() + ": changing affiliation for "
635								+ user.getRealJid() + " to " + user.getAffiliation() + " in "
636								+ conversation.getJid().asBareJid());
637						if (!user.realJidMatchesAccount()) {
638							boolean isNew = conversation.getMucOptions().updateUser(user);
639							mXmppConnectionService.getAvatarService().clear(conversation);
640							mXmppConnectionService.updateMucRosterUi();
641							mXmppConnectionService.updateConversationUi();
642							Contact contact = user.getContact();
643							if (!user.getAffiliation().ranks(MucOptions.Affiliation.MEMBER)) {
644								Jid jid = user.getRealJid();
645								List<Jid> cryptoTargets = conversation.getAcceptedCryptoTargets();
646								if (cryptoTargets.remove(user.getRealJid())) {
647									Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": removed " + jid + " from crypto targets of " + conversation.getName());
648									conversation.setAcceptedCryptoTargets(cryptoTargets);
649									mXmppConnectionService.updateConversation(conversation);
650								}
651							} else if (isNew
652									&& user.getRealJid() != null
653									&& conversation.getMucOptions().isPrivateAndNonAnonymous()
654									&& (contact == null || !contact.mutualPresenceSubscription())
655									&& account.getAxolotlService().hasEmptyDeviceList(user.getRealJid())) {
656								account.getAxolotlService().fetchDeviceIds(user.getRealJid());
657							}
658						}
659					}
660				}
661			}
662		}
663
664		Element received = packet.findChild("received", "urn:xmpp:chat-markers:0");
665		if (received == null) {
666			received = packet.findChild("received", "urn:xmpp:receipts");
667		}
668		if (received != null) {
669			String id = received.getAttribute("id");
670			if (packet.fromAccount(account)) {
671				if (query != null && id != null && packet.getTo() != null) {
672					query.pendingReceiptRequests.remove(new ReceiptRequest(packet.getTo(),id));
673				}
674			} else {
675				mXmppConnectionService.markMessage(account, from.asBareJid(), received.getAttribute("id"), Message.STATUS_SEND_RECEIVED);
676			}
677		}
678		Element displayed = packet.findChild("displayed", "urn:xmpp:chat-markers:0");
679		if (displayed != null) {
680			final String id = displayed.getAttribute("id");
681			final Jid sender = displayed.getAttributeAsJid("sender");
682			if (packet.fromAccount(account) && !selfAddressed) {
683				dismissNotification(account, counterpart, query);
684			} else if (isTypeGroupChat) {
685				Conversation conversation = mXmppConnectionService.find(account, counterpart.asBareJid());
686				if (conversation != null && id != null && sender != null) {
687					Message message = conversation.findMessageWithRemoteId(id, sender);
688					if (message != null) {
689						final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
690						final Jid trueJid = getTrueCounterpart((query != null && query.safeToExtractTrueCounterpart()) ? mucUserElement : null, fallback);
691						final boolean trueJidMatchesAccount = account.getJid().asBareJid().equals(trueJid == null ? null : trueJid.asBareJid());
692						if (trueJidMatchesAccount || conversation.getMucOptions().isSelf(counterpart)) {
693							if (!message.isRead() && (query == null || query.isCatchup())) { //checking if message is unread fixes race conditions with reflections
694								mXmppConnectionService.markRead(conversation);
695							}
696						} else  if (!counterpart.isBareJid() && trueJid != null){
697							ReadByMarker readByMarker = ReadByMarker.from(counterpart, trueJid);
698							if (message.addReadByMarker(readByMarker)) {
699								Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": added read by (" + readByMarker.getRealJid() + ") to message '" + message.getBody() + "'");
700								mXmppConnectionService.updateMessage(message);
701							}
702						}
703					}
704				}
705			} else {
706				final Message displayedMessage = mXmppConnectionService.markMessage(account, from.asBareJid(), id, Message.STATUS_SEND_DISPLAYED);
707				Message message = displayedMessage == null ? null : displayedMessage.prev();
708				while (message != null
709						&& message.getStatus() == Message.STATUS_SEND_RECEIVED
710						&& message.getTimeSent() < displayedMessage.getTimeSent()) {
711					mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
712					message = message.prev();
713				}
714				if (displayedMessage != null && selfAddressed) {
715					dismissNotification(account, counterpart, query);
716				}
717			}
718		}
719
720		Element event = original.findChild("event", "http://jabber.org/protocol/pubsub#event");
721		if (event != null) {
722			parseEvent(event, original.getFrom(), account);
723		}
724
725		final String nick = packet.findChildContent("nick", Namespace.NICK);
726		if (nick != null) {
727			Contact contact = account.getRoster().getContact(from);
728			if (contact.setPresenceName(nick)) {
729				mXmppConnectionService.getAvatarService().clear(contact);
730			}
731		}
732	}
733
734	private void dismissNotification(Account account, Jid counterpart, MessageArchiveService.Query query) {
735		Conversation conversation = mXmppConnectionService.find(account, counterpart.asBareJid());
736		if (conversation != null && (query == null || query.isCatchup())) {
737			mXmppConnectionService.markRead(conversation); //TODO only mark messages read that are older than timestamp
738		}
739	}
740
741	private static Jid getTrueCounterpart(Element mucUserElement, Jid fallback) {
742		final Element item = mucUserElement == null ? null : mucUserElement.findChild("item");
743		Jid result = item == null ? null : item.getAttributeAsJid("jid");
744		return result != null ? result : fallback;
745	}
746
747	private void processMessageReceipts(Account account, MessagePacket packet, MessageArchiveService.Query query) {
748		final boolean markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
749		final boolean request = packet.hasChild("request", "urn:xmpp:receipts");
750		if (query == null) {
751			final ArrayList<String> receiptsNamespaces = new ArrayList<>();
752			if (markable) {
753				receiptsNamespaces.add("urn:xmpp:chat-markers:0");
754			}
755			if (request) {
756				receiptsNamespaces.add("urn:xmpp:receipts");
757			}
758			if (receiptsNamespaces.size() > 0) {
759				MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
760						packet,
761						receiptsNamespaces,
762						packet.getType());
763				mXmppConnectionService.sendMessagePacket(account, receipt);
764			}
765		} else {
766			if (request) {
767				query.pendingReceiptRequests.add(new ReceiptRequest(packet.getFrom(),packet.getId()));
768			}
769		}
770	}
771
772	private static final SimpleDateFormat TIME_FORMAT = new SimpleDateFormat("HH:mm:ss", Locale.ENGLISH);
773
774	private void activateGracePeriod(Account account) {
775		long duration = mXmppConnectionService.getLongPreference("grace_period_length", R.integer.grace_period) * 1000;
776		Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": activating grace period till " + TIME_FORMAT.format(new Date(System.currentTimeMillis() + duration)));
777		account.activateGracePeriod(duration);
778	}
779}