1package eu.siacs.conversations.parser;
  2
  3import android.util.Log;
  4import android.util.Pair;
  5
  6import java.net.URL;
  7import java.text.SimpleDateFormat;
  8import java.util.ArrayList;
  9import java.util.Arrays;
 10import java.util.Collections;
 11import java.util.Date;
 12import java.util.List;
 13import java.util.Locale;
 14import java.util.Set;
 15import java.util.UUID;
 16
 17import eu.siacs.conversations.Config;
 18import eu.siacs.conversations.R;
 19import eu.siacs.conversations.crypto.axolotl.AxolotlService;
 20import eu.siacs.conversations.crypto.axolotl.NotEncryptedForThisDeviceException;
 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.ReadByMarker;
 29import eu.siacs.conversations.entities.ReceiptRequest;
 30import eu.siacs.conversations.http.HttpConnectionManager;
 31import eu.siacs.conversations.http.P1S3UrlStreamHandler;
 32import eu.siacs.conversations.services.MessageArchiveService;
 33import eu.siacs.conversations.services.XmppConnectionService;
 34import eu.siacs.conversations.utils.CryptoHelper;
 35import eu.siacs.conversations.xml.Namespace;
 36import eu.siacs.conversations.xml.Element;
 37import eu.siacs.conversations.xmpp.InvalidJid;
 38import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
 39import eu.siacs.conversations.xmpp.chatstate.ChatState;
 40import eu.siacs.conversations.xmpp.pep.Avatar;
 41import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
 42import rocks.xmpp.addr.Jid;
 43
 44public class MessageParser extends AbstractParser implements OnMessagePacketReceived {
 45
 46	private static final SimpleDateFormat TIME_FORMAT = new SimpleDateFormat("HH:mm:ss", Locale.ENGLISH);
 47
 48	public MessageParser(XmppConnectionService service) {
 49		super(service);
 50	}
 51
 52	private static String extractStanzaId(Element packet, boolean isTypeGroupChat, Conversation conversation) {
 53		final Jid by;
 54		final boolean safeToExtract;
 55		if (isTypeGroupChat) {
 56			by = conversation.getJid().asBareJid();
 57			safeToExtract = conversation.getMucOptions().hasFeature(Namespace.STANZA_IDS);
 58		} else {
 59			Account account = conversation.getAccount();
 60			by = account.getJid().asBareJid();
 61			safeToExtract = account.getXmppConnection().getFeatures().stanzaIds();
 62		}
 63		return safeToExtract ? extractStanzaId(packet, by) : null;
 64	}
 65
 66	private static String extractStanzaId(Element packet, Jid by) {
 67		for (Element child : packet.getChildren()) {
 68			if (child.getName().equals("stanza-id")
 69					&& Namespace.STANZA_IDS.equals(child.getNamespace())
 70					&& by.equals(InvalidJid.getNullForInvalid(child.getAttributeAsJid("by")))) {
 71				return child.getAttribute("id");
 72			}
 73		}
 74		return null;
 75	}
 76
 77	private static Jid getTrueCounterpart(Element mucUserElement, Jid fallback) {
 78		final Element item = mucUserElement == null ? null : mucUserElement.findChild("item");
 79		Jid result = item == null ? null : InvalidJid.getNullForInvalid(item.getAttributeAsJid("jid"));
 80		return result != null ? result : fallback;
 81	}
 82
 83	private boolean extractChatState(Conversation c, final boolean isTypeGroupChat, final MessagePacket packet) {
 84		ChatState state = ChatState.parse(packet);
 85		if (state != null && c != null) {
 86			final Account account = c.getAccount();
 87			Jid from = packet.getFrom();
 88			if (from.asBareJid().equals(account.getJid().asBareJid())) {
 89				c.setOutgoingChatState(state);
 90				if (state == ChatState.ACTIVE || state == ChatState.COMPOSING) {
 91					mXmppConnectionService.markRead(c);
 92					activateGracePeriod(account);
 93				}
 94				return false;
 95			} else {
 96				if (isTypeGroupChat) {
 97					MucOptions.User user = c.getMucOptions().findUserByFullJid(from);
 98					if (user != null) {
 99						return user.setChatState(state);
100					} else {
101						return false;
102					}
103				} else {
104					return c.setIncomingChatState(state);
105				}
106			}
107		}
108		return false;
109	}
110
111	private Message parseAxolotlChat(Element axolotlMessage, Jid from, Conversation conversation, int status, boolean postpone) {
112		final AxolotlService service = conversation.getAccount().getAxolotlService();
113		final XmppAxolotlMessage xmppAxolotlMessage;
114		try {
115			xmppAxolotlMessage = XmppAxolotlMessage.fromElement(axolotlMessage, from.asBareJid());
116		} catch (Exception e) {
117			Log.d(Config.LOGTAG, conversation.getAccount().getJid().asBareJid() + ": invalid omemo message received " + e.getMessage());
118			return null;
119		}
120		if (xmppAxolotlMessage.hasPayload()) {
121			final XmppAxolotlMessage.XmppAxolotlPlaintextMessage plaintextMessage;
122			try {
123				plaintextMessage = service.processReceivingPayloadMessage(xmppAxolotlMessage, postpone);
124			} catch (NotEncryptedForThisDeviceException e) {
125				return new Message(conversation, "", Message.ENCRYPTION_AXOLOTL_NOT_FOR_THIS_DEVICE, status);
126			}
127			if (plaintextMessage != null) {
128				Message finishedMessage = new Message(conversation, plaintextMessage.getPlaintext(), Message.ENCRYPTION_AXOLOTL, status);
129				finishedMessage.setFingerprint(plaintextMessage.getFingerprint());
130				Log.d(Config.LOGTAG, AxolotlService.getLogprefix(finishedMessage.getConversation().getAccount()) + " Received Message with session fingerprint: " + plaintextMessage.getFingerprint());
131				return finishedMessage;
132			}
133		} else {
134			Log.d(Config.LOGTAG, conversation.getAccount().getJid().asBareJid() + ": received OMEMO key transport message");
135			service.processReceivingKeyTransportMessage(xmppAxolotlMessage, postpone);
136		}
137		return null;
138	}
139
140	private Invite extractInvite(Account account, Element message) {
141		Element x = message.findChild("x", "http://jabber.org/protocol/muc#user");
142		if (x != null) {
143			Element invite = x.findChild("invite");
144			if (invite != null) {
145				String password = x.findChildContent("password");
146				Jid from = InvalidJid.getNullForInvalid(invite.getAttributeAsJid("from"));
147				Contact contact = from == null ? null : account.getRoster().getContact(from);
148				Jid room = InvalidJid.getNullForInvalid(message.getAttributeAsJid("from"));
149				if (room == null) {
150					return null;
151				}
152				return new Invite(room, password, contact);
153			}
154		} else {
155			x = message.findChild("x", "jabber:x:conference");
156			if (x != null) {
157				Jid from = InvalidJid.getNullForInvalid(message.getAttributeAsJid("from"));
158				Contact contact = from == null ? null : account.getRoster().getContact(from);
159				Jid room = InvalidJid.getNullForInvalid(x.getAttributeAsJid("jid"));
160				if (room == null) {
161					return null;
162				}
163				return new Invite(room, x.getAttribute("password"), contact);
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						if (contact.setAvatar(avatar)) {
187							mXmppConnectionService.syncRoster(account);
188							mXmppConnectionService.getAvatarService().clear(contact);
189							mXmppConnectionService.updateConversationUi();
190							mXmppConnectionService.updateRosterUi();
191						}
192					}
193				} else if (mXmppConnectionService.isDataSaverDisabled()) {
194					mXmppConnectionService.fetchAvatar(account, avatar);
195				}
196			}
197		} else if ("http://jabber.org/protocol/nick".equals(node)) {
198			final Element i = items.findChild("item");
199			final String nick = i == null ? null : i.findChildContent("nick", Namespace.NICK);
200			if (nick != null) {
201				Contact contact = account.getRoster().getContact(from);
202				if (contact.setPresenceName(nick)) {
203					mXmppConnectionService.getAvatarService().clear(contact);
204				}
205				mXmppConnectionService.updateConversationUi();
206				mXmppConnectionService.updateAccountUi();
207			}
208		} else if (AxolotlService.PEP_DEVICE_LIST.equals(node)) {
209			Element item = items.findChild("item");
210			Set<Integer> deviceIds = mXmppConnectionService.getIqParser().deviceIds(item);
211			Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Received PEP device list " + deviceIds + " update from " + from + ", processing... ");
212			AxolotlService axolotlService = account.getAxolotlService();
213			axolotlService.registerDevices(from, deviceIds);
214		} else if (Namespace.BOOKMARKS.equals(node)) {
215			Log.d(Config.LOGTAG,"received bookmarks from "+from);
216			if (account.getJid().asBareJid().equals(from)) {
217				final Element i = items.findChild("item");
218				final Element storage = i == null ? null : i.findChild("storage", Namespace.BOOKMARKS);
219				mXmppConnectionService.processBookmarks(account,storage);
220			}
221		}
222	}
223
224	private boolean handleErrorMessage(Account account, MessagePacket packet) {
225		if (packet.getType() == MessagePacket.TYPE_ERROR) {
226			Jid from = packet.getFrom();
227			if (from != null) {
228				mXmppConnectionService.markMessage(account,
229						from.asBareJid(),
230						packet.getId(),
231						Message.STATUS_SEND_FAILED,
232						extractErrorMessage(packet));
233			}
234			return true;
235		}
236		return false;
237	}
238
239	@Override
240	public void onMessagePacketReceived(Account account, MessagePacket original) {
241		if (handleErrorMessage(account, original)) {
242			return;
243		}
244		final MessagePacket packet;
245		Long timestamp = null;
246		boolean isCarbon = false;
247		String serverMsgId = null;
248		final Element fin = original.findChild("fin", MessageArchiveService.Version.MAM_0.namespace);
249		if (fin != null) {
250			mXmppConnectionService.getMessageArchiveService().processFinLegacy(fin, original.getFrom());
251			return;
252		}
253		final Element result = MessageArchiveService.Version.findResult(original);
254		final MessageArchiveService.Query query = result == null ? null : mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
255		if (query != null && query.validFrom(original.getFrom())) {
256			Pair<MessagePacket, Long> f = original.getForwardedMessagePacket("result", query.version.namespace);
257			if (f == null) {
258				return;
259			}
260			timestamp = f.second;
261			packet = f.first;
262			serverMsgId = result.getAttribute("id");
263			query.incrementMessageCount();
264		} else if (query != null) {
265			Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received mam result from invalid sender");
266			return;
267		} else if (original.fromServer(account)) {
268			Pair<MessagePacket, Long> f;
269			f = original.getForwardedMessagePacket("received", "urn:xmpp:carbons:2");
270			f = f == null ? original.getForwardedMessagePacket("sent", "urn:xmpp:carbons:2") : f;
271			packet = f != null ? f.first : original;
272			if (handleErrorMessage(account, packet)) {
273				return;
274			}
275			timestamp = f != null ? f.second : null;
276			isCarbon = f != null;
277		} else {
278			packet = original;
279		}
280
281		if (timestamp == null) {
282			timestamp = AbstractParser.parseTimestamp(original, AbstractParser.parseTimestamp(packet));
283		}
284		final String body = packet.getBody();
285		final Element mucUserElement = packet.findChild("x", "http://jabber.org/protocol/muc#user");
286		final String pgpEncrypted = packet.findChildContent("x", "jabber:x:encrypted");
287		final Element replaceElement = packet.findChild("replace", "urn:xmpp:message-correct:0");
288		final Element oob = packet.findChild("x", Namespace.OOB);
289		final Element xP1S3 = packet.findChild("x", Namespace.P1_S3_FILE_TRANSFER);
290		final URL xP1S3url = xP1S3 == null ? null : P1S3UrlStreamHandler.of(xP1S3);
291		final String oobUrl = oob != null ? oob.findChildContent("url") : null;
292		final String replacementId = replaceElement == null ? null : replaceElement.getAttribute("id");
293		final Element axolotlEncrypted = packet.findChild(XmppAxolotlMessage.CONTAINERTAG, AxolotlService.PEP_PREFIX);
294		int status;
295		final Jid counterpart;
296		final Jid to = packet.getTo();
297		final Jid from = packet.getFrom();
298		final Element originId = packet.findChild("origin-id", Namespace.STANZA_IDS);
299		final String remoteMsgId;
300		if (originId != null && originId.getAttribute("id") != null) {
301			remoteMsgId = originId.getAttribute("id");
302		} else {
303			remoteMsgId = packet.getId();
304		}
305		boolean notify = false;
306
307		if (from == null || !InvalidJid.isValid(from) || !InvalidJid.isValid(to)) {
308			Log.e(Config.LOGTAG, "encountered invalid message from='" + from + "' to='" + to + "'");
309			return;
310		}
311
312		boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
313		if (query != null && !query.muc() && isTypeGroupChat) {
314			Log.e(Config.LOGTAG, account.getJid().asBareJid() + ": received groupchat (" + from + ") message on regular MAM request. skipping");
315			return;
316		}
317		boolean isMucStatusMessage = InvalidJid.hasValidFrom(packet) && from.isBareJid() && mucUserElement != null && mucUserElement.hasChild("status");
318		boolean selfAddressed;
319		if (packet.fromAccount(account)) {
320			status = Message.STATUS_SEND;
321			selfAddressed = to == null || account.getJid().asBareJid().equals(to.asBareJid());
322			if (selfAddressed) {
323				counterpart = from;
324			} else {
325				counterpart = to != null ? to : account.getJid();
326			}
327		} else {
328			status = Message.STATUS_RECEIVED;
329			counterpart = from;
330			selfAddressed = false;
331		}
332
333		Invite invite = extractInvite(account, packet);
334		if (invite != null && invite.execute(account)) {
335			return;
336		}
337
338		if ((body != null || pgpEncrypted != null || (axolotlEncrypted != null && axolotlEncrypted.hasChild("payload")) || oobUrl != null || xP1S3 != null) && !isMucStatusMessage) {
339			final boolean conversationIsProbablyMuc = isTypeGroupChat || mucUserElement != null || account.getXmppConnection().getMucServersWithholdAccount().contains(counterpart.getDomain());
340			final Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.asBareJid(), conversationIsProbablyMuc, false, query, false);
341			final boolean conversationMultiMode = conversation.getMode() == Conversation.MODE_MULTI;
342
343			if (serverMsgId == null) {
344				serverMsgId = extractStanzaId(packet, isTypeGroupChat, conversation);
345			}
346
347
348			if (selfAddressed) {
349				if (mXmppConnectionService.markMessage(conversation, remoteMsgId, Message.STATUS_SEND_RECEIVED, serverMsgId)) {
350					return;
351				}
352				status = Message.STATUS_RECEIVED;
353				if (remoteMsgId != null && conversation.findMessageWithRemoteId(remoteMsgId, counterpart) != null) {
354					return;
355				}
356			}
357
358			if (isTypeGroupChat) {
359				if (conversation.getMucOptions().isSelf(counterpart)) {
360					status = Message.STATUS_SEND_RECEIVED;
361					isCarbon = true; //not really carbon but received from another resource
362					if (mXmppConnectionService.markMessage(conversation, remoteMsgId, status, serverMsgId)) {
363						return;
364					} else if (remoteMsgId == null || Config.IGNORE_ID_REWRITE_IN_MUC) {
365						Message message = conversation.findSentMessageWithBody(packet.getBody());
366						if (message != null) {
367							mXmppConnectionService.markMessage(message, status);
368							return;
369						}
370					}
371				} else {
372					status = Message.STATUS_RECEIVED;
373				}
374			}
375			final Message message;
376			if (xP1S3url != null) {
377				message = new Message(conversation, xP1S3url.toString(), Message.ENCRYPTION_NONE, status);
378				message.setOob(true);
379				if (CryptoHelper.isPgpEncryptedUrl(xP1S3url.toString())) {
380					message.setEncryption(Message.ENCRYPTION_DECRYPTED);
381				}
382			} else if (pgpEncrypted != null && Config.supportOpenPgp()) {
383				message = new Message(conversation, pgpEncrypted, Message.ENCRYPTION_PGP, status);
384			} else if (axolotlEncrypted != null && Config.supportOmemo()) {
385				Jid origin;
386				Set<Jid> fallbacksBySourceId = Collections.emptySet();
387				if (conversationMultiMode) {
388					final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
389					origin = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
390					if (origin == null) {
391						try {
392							fallbacksBySourceId = account.getAxolotlService().findCounterpartsBySourceId(XmppAxolotlMessage.parseSourceId(axolotlEncrypted));
393						} catch (IllegalArgumentException e) {
394							//ignoring
395						}
396					}
397					if (origin == null && fallbacksBySourceId.size() == 0) {
398						Log.d(Config.LOGTAG, "axolotl message in anonymous conference received and no possible fallbacks");
399						return;
400					}
401				} else {
402					fallbacksBySourceId = Collections.emptySet();
403					origin = from;
404				}
405				if (origin != null) {
406					message = parseAxolotlChat(axolotlEncrypted, origin, conversation, status, query != null);
407				} else {
408					Message trial = null;
409					for (Jid fallback : fallbacksBySourceId) {
410						trial = parseAxolotlChat(axolotlEncrypted, fallback, conversation, status, query != null);
411						if (trial != null) {
412							Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": decoded muc message using fallback");
413							origin = fallback;
414							break;
415						}
416					}
417					message = trial;
418				}
419				if (message == null) {
420					if (query == null && extractChatState(mXmppConnectionService.find(account, counterpart.asBareJid()), isTypeGroupChat, packet)) {
421						mXmppConnectionService.updateConversationUi();
422					}
423					if (query != null && status == Message.STATUS_SEND && remoteMsgId != null) {
424						Message previouslySent = conversation.findSentMessageWithUuid(remoteMsgId);
425						if (previouslySent != null && previouslySent.getServerMsgId() == null && serverMsgId != null) {
426							previouslySent.setServerMsgId(serverMsgId);
427							mXmppConnectionService.databaseBackend.updateMessage(previouslySent, false);
428							Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": encountered previously sent OMEMO message without serverId. updating...");
429						}
430					}
431					return;
432				}
433				if (conversationMultiMode) {
434					message.setTrueCounterpart(origin);
435				}
436			} else if (body == null && oobUrl != null) {
437				message = new Message(conversation, oobUrl, Message.ENCRYPTION_NONE, status);
438				message.setOob(true);
439				if (CryptoHelper.isPgpEncryptedUrl(oobUrl)) {
440					message.setEncryption(Message.ENCRYPTION_DECRYPTED);
441				}
442			} else {
443				message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
444			}
445
446			message.setCounterpart(counterpart);
447			message.setRemoteMsgId(remoteMsgId);
448			message.setServerMsgId(serverMsgId);
449			message.setCarbon(isCarbon);
450			message.setTime(timestamp);
451			if (body != null && body.equals(oobUrl)) {
452				message.setOob(true);
453				if (CryptoHelper.isPgpEncryptedUrl(oobUrl)) {
454					message.setEncryption(Message.ENCRYPTION_DECRYPTED);
455				}
456			}
457			message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
458			if (conversationMultiMode) {
459				message.setMucUser(conversation.getMucOptions().findUserByFullJid(counterpart));
460				final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
461				Jid trueCounterpart;
462				if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
463					trueCounterpart = message.getTrueCounterpart();
464				} else if (query != null && query.safeToExtractTrueCounterpart()) {
465					trueCounterpart = getTrueCounterpart(mucUserElement, fallback);
466				} else {
467					trueCounterpart = fallback;
468				}
469				if (trueCounterpart != null && trueCounterpart.asBareJid().equals(account.getJid().asBareJid())) {
470					status = isTypeGroupChat ? Message.STATUS_SEND_RECEIVED : Message.STATUS_SEND;
471				}
472				message.setStatus(status);
473				message.setTrueCounterpart(trueCounterpart);
474				if (!isTypeGroupChat) {
475					message.setType(Message.TYPE_PRIVATE);
476				}
477			} else {
478				updateLastseen(account, from);
479			}
480
481			if (replacementId != null && mXmppConnectionService.allowMessageCorrection()) {
482				final Message replacedMessage = conversation.findMessageWithRemoteIdAndCounterpart(replacementId,
483						counterpart,
484						message.getStatus() == Message.STATUS_RECEIVED,
485						message.isCarbon());
486				if (replacedMessage != null) {
487					final boolean fingerprintsMatch = replacedMessage.getFingerprint() == null
488							|| replacedMessage.getFingerprint().equals(message.getFingerprint());
489					final boolean trueCountersMatch = replacedMessage.getTrueCounterpart() != null
490							&& replacedMessage.getTrueCounterpart().equals(message.getTrueCounterpart());
491					final boolean mucUserMatches = query == null && replacedMessage.sameMucUser(message); //can not be checked when using mam
492					final boolean duplicate = conversation.hasDuplicateMessage(message);
493					if (fingerprintsMatch && (trueCountersMatch || !conversationMultiMode || mucUserMatches) && !duplicate) {
494						Log.d(Config.LOGTAG, "replaced message '" + replacedMessage.getBody() + "' with '" + message.getBody() + "'");
495						synchronized (replacedMessage) {
496							final String uuid = replacedMessage.getUuid();
497							replacedMessage.setUuid(UUID.randomUUID().toString());
498							replacedMessage.setBody(message.getBody());
499							replacedMessage.setEdited(replacedMessage.getRemoteMsgId());
500							replacedMessage.setRemoteMsgId(remoteMsgId);
501							if (replacedMessage.getServerMsgId() == null || message.getServerMsgId() != null) {
502								replacedMessage.setServerMsgId(message.getServerMsgId());
503							}
504							replacedMessage.setEncryption(message.getEncryption());
505							if (replacedMessage.getStatus() == Message.STATUS_RECEIVED) {
506								replacedMessage.markUnread();
507							}
508							extractChatState(mXmppConnectionService.find(account, counterpart.asBareJid()), isTypeGroupChat, packet);
509							mXmppConnectionService.updateMessage(replacedMessage, uuid);
510							mXmppConnectionService.getNotificationService().updateNotification(false);
511							if (mXmppConnectionService.confirmMessages()
512									&& replacedMessage.getStatus() == Message.STATUS_RECEIVED
513									&& (replacedMessage.trusted() || replacedMessage.getType() == Message.TYPE_PRIVATE)
514									&& remoteMsgId != null
515									&& !selfAddressed
516									&& !isTypeGroupChat) {
517								processMessageReceipts(account, packet, query);
518							}
519							if (replacedMessage.getEncryption() == Message.ENCRYPTION_PGP) {
520								conversation.getAccount().getPgpDecryptionService().discard(replacedMessage);
521								conversation.getAccount().getPgpDecryptionService().decrypt(replacedMessage, false);
522							}
523						}
524						return;
525					} else {
526						Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received message correction but verification didn't check out");
527					}
528				}
529			}
530
531			long deletionDate = mXmppConnectionService.getAutomaticMessageDeletionDate();
532			if (deletionDate != 0 && message.getTimeSent() < deletionDate) {
533				Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": skipping message from " + message.getCounterpart().toString() + " because it was sent prior to our deletion date");
534				return;
535			}
536
537			boolean checkForDuplicates = (isTypeGroupChat && packet.hasChild("delay", "urn:xmpp:delay"))
538					|| message.getType() == Message.TYPE_PRIVATE
539					|| message.getServerMsgId() != null
540					|| (query == null && mXmppConnectionService.getMessageArchiveService().isCatchupInProgress(conversation));
541			if (checkForDuplicates) {
542				final Message duplicate = conversation.findDuplicateMessage(message);
543				if (duplicate != null) {
544					final boolean serverMsgIdUpdated;
545					if (duplicate.getStatus() != Message.STATUS_RECEIVED
546							&& duplicate.getUuid().equals(message.getRemoteMsgId())
547							&& duplicate.getServerMsgId() == null
548							&& message.getServerMsgId() != null) {
549						duplicate.setServerMsgId(message.getServerMsgId());
550						if (mXmppConnectionService.databaseBackend.updateMessage(duplicate, false)) {
551							serverMsgIdUpdated = true;
552						} else {
553							serverMsgIdUpdated = false;
554							Log.e(Config.LOGTAG,"failed to update message");
555						}
556					} else {
557						serverMsgIdUpdated = false;
558					}
559					Log.d(Config.LOGTAG, "skipping duplicate message with " + message.getCounterpart() + ". serverMsgIdUpdated=" + Boolean.toString(serverMsgIdUpdated));
560					return;
561				}
562			}
563
564			if (query != null && query.getPagingOrder() == MessageArchiveService.PagingOrder.REVERSE) {
565				conversation.prepend(query.getActualInThisQuery(), message);
566			} else {
567				conversation.add(message);
568			}
569			if (query != null) {
570				query.incrementActualMessageCount();
571			}
572
573			if (query == null || query.isCatchup()) { //either no mam or catchup
574				if (status == Message.STATUS_SEND || status == Message.STATUS_SEND_RECEIVED) {
575					mXmppConnectionService.markRead(conversation);
576					if (query == null) {
577						activateGracePeriod(account);
578					}
579				} else {
580					message.markUnread();
581					notify = true;
582				}
583			}
584
585			if (message.getEncryption() == Message.ENCRYPTION_PGP) {
586				notify = conversation.getAccount().getPgpDecryptionService().decrypt(message, notify);
587			} else if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL_NOT_FOR_THIS_DEVICE) {
588				notify = false;
589			}
590
591			if (query == null) {
592				extractChatState(mXmppConnectionService.find(account, counterpart.asBareJid()), isTypeGroupChat, packet);
593				mXmppConnectionService.updateConversationUi();
594			}
595
596			if (mXmppConnectionService.confirmMessages()
597					&& message.getStatus() == Message.STATUS_RECEIVED
598					&& (message.trusted() || message.getType() == Message.TYPE_PRIVATE)
599					&& remoteMsgId != null
600					&& !selfAddressed
601					&& !isTypeGroupChat) {
602				processMessageReceipts(account, packet, query);
603			}
604
605			mXmppConnectionService.databaseBackend.createMessage(message);
606			final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
607			if (message.trusted() && message.treatAsDownloadable() && manager.getAutoAcceptFileSize() > 0) {
608				manager.createNewDownloadConnection(message);
609			} else if (notify) {
610				if (query != null && query.isCatchup()) {
611					mXmppConnectionService.getNotificationService().pushFromBacklog(message);
612				} else {
613					mXmppConnectionService.getNotificationService().push(message);
614				}
615			}
616		} else if (!packet.hasChild("body")) { //no body
617
618			final Conversation conversation = mXmppConnectionService.find(account, from.asBareJid());
619			if (axolotlEncrypted != null) {
620				Jid origin;
621				if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
622					final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
623					origin = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
624					if (origin == null) {
625						Log.d(Config.LOGTAG, "omemo key transport message in anonymous conference received");
626						return;
627					}
628				} else if (isTypeGroupChat) {
629					return;
630				} else {
631					origin = from;
632				}
633				try {
634					final XmppAxolotlMessage xmppAxolotlMessage = XmppAxolotlMessage.fromElement(axolotlEncrypted, origin.asBareJid());
635					account.getAxolotlService().processReceivingKeyTransportMessage(xmppAxolotlMessage, query != null);
636					Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": omemo key transport message received from " + origin);
637				} catch (Exception e) {
638					Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": invalid omemo key transport message received " + e.getMessage());
639					return;
640				}
641			}
642
643			if (query == null && extractChatState(mXmppConnectionService.find(account, counterpart.asBareJid()), isTypeGroupChat, packet)) {
644				mXmppConnectionService.updateConversationUi();
645			}
646
647			if (isTypeGroupChat) {
648				if (packet.hasChild("subject")) {
649					if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
650						conversation.setHasMessagesLeftOnServer(conversation.countMessages() > 0);
651						String subject = packet.findInternationalizedChildContent("subject");
652						if (conversation.getMucOptions().setSubject(subject)) {
653							mXmppConnectionService.updateConversation(conversation);
654						}
655						mXmppConnectionService.updateConversationUi();
656						return;
657					}
658				}
659			}
660			if (conversation != null && mucUserElement != null && InvalidJid.hasValidFrom(packet) && from.isBareJid()) {
661				for (Element child : mucUserElement.getChildren()) {
662					if ("status".equals(child.getName())) {
663						try {
664							int code = Integer.parseInt(child.getAttribute("code"));
665							if ((code >= 170 && code <= 174) || (code >= 102 && code <= 104)) {
666								mXmppConnectionService.fetchConferenceConfiguration(conversation);
667								break;
668							}
669						} catch (Exception e) {
670							//ignored
671						}
672					} else if ("item".equals(child.getName())) {
673						MucOptions.User user = AbstractParser.parseItem(conversation, child);
674						Log.d(Config.LOGTAG, account.getJid() + ": changing affiliation for "
675								+ user.getRealJid() + " to " + user.getAffiliation() + " in "
676								+ conversation.getJid().asBareJid());
677						if (!user.realJidMatchesAccount()) {
678							boolean isNew = conversation.getMucOptions().updateUser(user);
679							mXmppConnectionService.getAvatarService().clear(conversation);
680							mXmppConnectionService.updateMucRosterUi();
681							mXmppConnectionService.updateConversationUi();
682							Contact contact = user.getContact();
683							if (!user.getAffiliation().ranks(MucOptions.Affiliation.MEMBER)) {
684								Jid jid = user.getRealJid();
685								List<Jid> cryptoTargets = conversation.getAcceptedCryptoTargets();
686								if (cryptoTargets.remove(user.getRealJid())) {
687									Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": removed " + jid + " from crypto targets of " + conversation.getName());
688									conversation.setAcceptedCryptoTargets(cryptoTargets);
689									mXmppConnectionService.updateConversation(conversation);
690								}
691							} else if (isNew
692									&& user.getRealJid() != null
693									&& conversation.getMucOptions().isPrivateAndNonAnonymous()
694									&& (contact == null || !contact.mutualPresenceSubscription())
695									&& account.getAxolotlService().hasEmptyDeviceList(user.getRealJid())) {
696								account.getAxolotlService().fetchDeviceIds(user.getRealJid());
697							}
698						}
699					}
700				}
701			}
702		}
703
704		Element received = packet.findChild("received", "urn:xmpp:chat-markers:0");
705		if (received == null) {
706			received = packet.findChild("received", "urn:xmpp:receipts");
707		}
708		if (received != null) {
709			String id = received.getAttribute("id");
710			if (packet.fromAccount(account)) {
711				if (query != null && id != null && packet.getTo() != null) {
712					query.removePendingReceiptRequest(new ReceiptRequest(packet.getTo(), id));
713				}
714			} else {
715				mXmppConnectionService.markMessage(account, from.asBareJid(), received.getAttribute("id"), Message.STATUS_SEND_RECEIVED);
716			}
717		}
718		Element displayed = packet.findChild("displayed", "urn:xmpp:chat-markers:0");
719		if (displayed != null) {
720			final String id = displayed.getAttribute("id");
721			final Jid sender = InvalidJid.getNullForInvalid(displayed.getAttributeAsJid("sender"));
722			if (packet.fromAccount(account) && !selfAddressed) {
723				dismissNotification(account, counterpart, query);
724			} else if (isTypeGroupChat) {
725				Conversation conversation = mXmppConnectionService.find(account, counterpart.asBareJid());
726				if (conversation != null && id != null && sender != null) {
727					Message message = conversation.findMessageWithRemoteId(id, sender);
728					if (message != null) {
729						final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
730						final Jid trueJid = getTrueCounterpart((query != null && query.safeToExtractTrueCounterpart()) ? mucUserElement : null, fallback);
731						final boolean trueJidMatchesAccount = account.getJid().asBareJid().equals(trueJid == null ? null : trueJid.asBareJid());
732						if (trueJidMatchesAccount || conversation.getMucOptions().isSelf(counterpart)) {
733							if (!message.isRead() && (query == null || query.isCatchup())) { //checking if message is unread fixes race conditions with reflections
734								mXmppConnectionService.markRead(conversation);
735							}
736						} else if (!counterpart.isBareJid() && trueJid != null) {
737							ReadByMarker readByMarker = ReadByMarker.from(counterpart, trueJid);
738							if (message.addReadByMarker(readByMarker)) {
739								Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": added read by (" + readByMarker.getRealJid() + ") to message '" + message.getBody() + "'");
740								mXmppConnectionService.updateMessage(message, false);
741							}
742						}
743					}
744				}
745			} else {
746				final Message displayedMessage = mXmppConnectionService.markMessage(account, from.asBareJid(), id, Message.STATUS_SEND_DISPLAYED);
747				Message message = displayedMessage == null ? null : displayedMessage.prev();
748				while (message != null
749						&& message.getStatus() == Message.STATUS_SEND_RECEIVED
750						&& message.getTimeSent() < displayedMessage.getTimeSent()) {
751					mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
752					message = message.prev();
753				}
754				if (displayedMessage != null && selfAddressed) {
755					dismissNotification(account, counterpart, query);
756				}
757			}
758		}
759
760		Element event = original.findChild("event", "http://jabber.org/protocol/pubsub#event");
761		if (event != null && InvalidJid.hasValidFrom(original)) {
762			parseEvent(event, original.getFrom(), account);
763		}
764
765		final String nick = packet.findChildContent("nick", Namespace.NICK);
766		if (nick != null && InvalidJid.hasValidFrom(original)) {
767			Contact contact = account.getRoster().getContact(from);
768			if (contact.setPresenceName(nick)) {
769				mXmppConnectionService.getAvatarService().clear(contact);
770			}
771		}
772	}
773
774	private void dismissNotification(Account account, Jid counterpart, MessageArchiveService.Query query) {
775		Conversation conversation = mXmppConnectionService.find(account, counterpart.asBareJid());
776		if (conversation != null && (query == null || query.isCatchup())) {
777			mXmppConnectionService.markRead(conversation); //TODO only mark messages read that are older than timestamp
778		}
779	}
780
781	private void processMessageReceipts(Account account, MessagePacket packet, MessageArchiveService.Query query) {
782		final boolean markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
783		final boolean request = packet.hasChild("request", "urn:xmpp:receipts");
784		if (query == null) {
785			final ArrayList<String> receiptsNamespaces = new ArrayList<>();
786			if (markable) {
787				receiptsNamespaces.add("urn:xmpp:chat-markers:0");
788			}
789			if (request) {
790				receiptsNamespaces.add("urn:xmpp:receipts");
791			}
792			if (receiptsNamespaces.size() > 0) {
793				MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
794						packet,
795						receiptsNamespaces,
796						packet.getType());
797				mXmppConnectionService.sendMessagePacket(account, receipt);
798			}
799		} else if (query.isCatchup()) {
800			if (request) {
801				query.addPendingReceiptRequest(new ReceiptRequest(packet.getFrom(), packet.getId()));
802			}
803		}
804	}
805
806	private void activateGracePeriod(Account account) {
807		long duration = mXmppConnectionService.getLongPreference("grace_period_length", R.integer.grace_period) * 1000;
808		Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": activating grace period till " + TIME_FORMAT.format(new Date(System.currentTimeMillis() + duration)));
809		account.activateGracePeriod(duration);
810	}
811
812	private class Invite {
813		final Jid jid;
814		final String password;
815		final Contact inviter;
816
817		Invite(Jid jid, String password, Contact inviter) {
818			this.jid = jid;
819			this.password = password;
820			this.inviter = inviter;
821		}
822
823		public boolean execute(Account account) {
824			if (jid != null) {
825				Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, jid, true, false);
826				if (!conversation.getMucOptions().online()) {
827					conversation.getMucOptions().setPassword(password);
828					mXmppConnectionService.databaseBackend.updateConversation(conversation);
829					mXmppConnectionService.joinMuc(conversation, inviter != null && inviter.mutualPresenceSubscription());
830					mXmppConnectionService.updateConversationUi();
831				}
832				return true;
833			}
834			return false;
835		}
836	}
837}