1package eu.siacs.conversations.parser;
2
3import net.java.otr4j.session.Session;
4import net.java.otr4j.session.SessionStatus;
5
6import eu.siacs.conversations.entities.Account;
7import eu.siacs.conversations.entities.Contact;
8import eu.siacs.conversations.entities.Conversation;
9import eu.siacs.conversations.entities.Message;
10import eu.siacs.conversations.entities.MucOptions;
11import eu.siacs.conversations.http.HttpConnectionManager;
12import eu.siacs.conversations.services.MessageArchiveService;
13import eu.siacs.conversations.services.XmppConnectionService;
14import eu.siacs.conversations.utils.CryptoHelper;
15import eu.siacs.conversations.xml.Element;
16import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
17import eu.siacs.conversations.xmpp.jid.Jid;
18import eu.siacs.conversations.xmpp.pep.Avatar;
19import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
20
21public class MessageParser extends AbstractParser implements
22 OnMessagePacketReceived {
23 public MessageParser(XmppConnectionService service) {
24 super(service);
25 }
26
27 private Message parseChat(MessagePacket packet, Account account) {
28 final Jid jid = packet.getFrom();
29 if (jid == null) {
30 return null;
31 }
32 Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, jid.toBareJid(), false);
33 updateLastseen(packet, account, true);
34 String pgpBody = getPgpBody(packet);
35 Message finishedMessage;
36 if (pgpBody != null) {
37 finishedMessage = new Message(conversation,
38 pgpBody, Message.ENCRYPTION_PGP, Message.STATUS_RECEIVED);
39 } else {
40 finishedMessage = new Message(conversation,
41 packet.getBody(), Message.ENCRYPTION_NONE,
42 Message.STATUS_RECEIVED);
43 }
44 finishedMessage.setRemoteMsgId(packet.getId());
45 finishedMessage.markable = isMarkable(packet);
46 if (conversation.getMode() == Conversation.MODE_MULTI
47 && !jid.isBareJid()) {
48 finishedMessage.setType(Message.TYPE_PRIVATE);
49 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
50 .getTrueCounterpart(jid.getResourcepart()));
51 if (conversation.hasDuplicateMessage(finishedMessage)) {
52 return null;
53 }
54
55 }
56 finishedMessage.setCounterpart(jid);
57 finishedMessage.setTime(getTimestamp(packet));
58 return finishedMessage;
59 }
60
61 private Message parseOtrChat(MessagePacket packet, Account account) {
62 final Jid to = packet.getTo();
63 final Jid from = packet.getFrom();
64 if (to == null || from == null) {
65 return null;
66 }
67 boolean properlyAddressed = !to.isBareJid() || account.countPresences() == 1;
68 Conversation conversation = mXmppConnectionService
69 .findOrCreateConversation(account, from.toBareJid(), false);
70 String presence;
71 if (from.isBareJid()) {
72 presence = "";
73 } else {
74 presence = from.getResourcepart();
75 }
76 updateLastseen(packet, account, true);
77 String body = packet.getBody();
78 if (body.matches("^\\?OTRv\\d{1,2}\\?.*")) {
79 conversation.endOtrIfNeeded();
80 }
81 if (!conversation.hasValidOtrSession()) {
82 if (properlyAddressed) {
83 conversation.startOtrSession(presence,false);
84 } else {
85 return null;
86 }
87 } else {
88 String foreignPresence = conversation.getOtrSession()
89 .getSessionID().getUserID();
90 if (!foreignPresence.equals(presence)) {
91 conversation.endOtrIfNeeded();
92 if (properlyAddressed) {
93 conversation.startOtrSession(presence, false);
94 } else {
95 return null;
96 }
97 }
98 }
99 try {
100 Session otrSession = conversation.getOtrSession();
101 SessionStatus before = otrSession.getSessionStatus();
102 body = otrSession.transformReceiving(body);
103 SessionStatus after = otrSession.getSessionStatus();
104 if ((before != after) && (after == SessionStatus.ENCRYPTED)) {
105 conversation.setNextEncryption(Message.ENCRYPTION_OTR);
106 mXmppConnectionService.onOtrSessionEstablished(conversation);
107 } else if ((before != after) && (after == SessionStatus.FINISHED)) {
108 conversation.setNextEncryption(Message.ENCRYPTION_NONE);
109 conversation.resetOtrSession();
110 mXmppConnectionService.updateConversationUi();
111 }
112 if ((body == null) || (body.isEmpty())) {
113 return null;
114 }
115 if (body.startsWith(CryptoHelper.FILETRANSFER)) {
116 String key = body.substring(CryptoHelper.FILETRANSFER.length());
117 conversation.setSymmetricKey(CryptoHelper.hexToBytes(key));
118 return null;
119 }
120 Message finishedMessage = new Message(conversation, body, Message.ENCRYPTION_OTR,
121 Message.STATUS_RECEIVED);
122 finishedMessage.setTime(getTimestamp(packet));
123 finishedMessage.setRemoteMsgId(packet.getId());
124 finishedMessage.markable = isMarkable(packet);
125 finishedMessage.setCounterpart(from);
126 return finishedMessage;
127 } catch (Exception e) {
128 conversation.resetOtrSession();
129 return null;
130 }
131 }
132
133 private Message parseGroupchat(MessagePacket packet, Account account) {
134 int status;
135 final Jid from = packet.getFrom();
136 if (from == null) {
137 return null;
138 }
139 if (mXmppConnectionService.find(account.pendingConferenceLeaves,
140 account, from.toBareJid()) != null) {
141 return null;
142 }
143 Conversation conversation = mXmppConnectionService
144 .findOrCreateConversation(account, from.toBareJid(), true);
145 if (packet.hasChild("subject")) {
146 conversation.setHasMessagesLeftOnServer(true);
147 conversation.getMucOptions().setSubject(packet.findChild("subject").getContent());
148 mXmppConnectionService.updateConversationUi();
149 return null;
150 }
151
152 final Element x = packet.findChild("x", "http://jabber.org/protocol/muc#user");
153 if (from.isBareJid() && (x == null || !x.hasChild("status"))) {
154 return null;
155 } else if (from.isBareJid() && x.hasChild("status")) {
156 for(Element child : x.getChildren()) {
157 if (child.getName().equals("status")) {
158 String code = child.getAttribute("code");
159 if (code.contains(MucOptions.STATUS_CODE_ROOM_CONFIG_CHANGED)) {
160 mXmppConnectionService.fetchConferenceConfiguration(conversation);
161 }
162 }
163 }
164 }
165
166 if (from.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
167 if (mXmppConnectionService.markMessage(conversation,
168 packet.getId(), Message.STATUS_SEND)) {
169 return null;
170 } else if (packet.getId() == null) {
171 Message message = conversation.findSentMessageWithBody(packet.getBody());
172 if (message != null) {
173 mXmppConnectionService.markMessage(message,Message.STATUS_SEND_RECEIVED);
174 return null;
175 } else {
176 status = Message.STATUS_SEND;
177 }
178 } else {
179 status = Message.STATUS_SEND;
180 }
181 } else {
182 status = Message.STATUS_RECEIVED;
183 }
184 String pgpBody = getPgpBody(packet);
185 Message finishedMessage;
186 if (pgpBody == null) {
187 finishedMessage = new Message(conversation,
188 packet.getBody(), Message.ENCRYPTION_NONE, status);
189 } else {
190 finishedMessage = new Message(conversation, pgpBody,
191 Message.ENCRYPTION_PGP, status);
192 }
193 finishedMessage.setRemoteMsgId(packet.getId());
194 finishedMessage.markable = isMarkable(packet);
195 finishedMessage.setCounterpart(from);
196 if (status == Message.STATUS_RECEIVED) {
197 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
198 .getTrueCounterpart(from.getResourcepart()));
199 }
200 if (packet.hasChild("delay")
201 && conversation.hasDuplicateMessage(finishedMessage)) {
202 return null;
203 }
204 finishedMessage.setTime(getTimestamp(packet));
205 return finishedMessage;
206 }
207
208 private Message parseCarbonMessage(final MessagePacket packet, final Account account) {
209 int status;
210 final Jid fullJid;
211 Element forwarded;
212 if (packet.hasChild("received", "urn:xmpp:carbons:2")) {
213 forwarded = packet.findChild("received", "urn:xmpp:carbons:2")
214 .findChild("forwarded", "urn:xmpp:forward:0");
215 status = Message.STATUS_RECEIVED;
216 } else if (packet.hasChild("sent", "urn:xmpp:carbons:2")) {
217 forwarded = packet.findChild("sent", "urn:xmpp:carbons:2")
218 .findChild("forwarded", "urn:xmpp:forward:0");
219 status = Message.STATUS_SEND;
220 } else {
221 return null;
222 }
223 if (forwarded == null) {
224 return null;
225 }
226 Element message = forwarded.findChild("message");
227 if (message == null) {
228 return null;
229 }
230 if (!message.hasChild("body")) {
231 if (status == Message.STATUS_RECEIVED
232 && message.getAttribute("from") != null) {
233 parseNonMessage(message, account);
234 } else if (status == Message.STATUS_SEND
235 && message.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
236 final Jid to = message.getAttributeAsJid("to");
237 if (to != null) {
238 final Conversation conversation = mXmppConnectionService.find(
239 mXmppConnectionService.getConversations(), account,
240 to.toBareJid());
241 if (conversation != null) {
242 mXmppConnectionService.markRead(conversation);
243 }
244 }
245 }
246 return null;
247 }
248 if (status == Message.STATUS_RECEIVED) {
249 fullJid = message.getAttributeAsJid("from");
250 if (fullJid == null) {
251 return null;
252 } else {
253 updateLastseen(message, account, true);
254 }
255 } else {
256 fullJid = message.getAttributeAsJid("to");
257 if (fullJid == null) {
258 return null;
259 }
260 }
261 if (message.hasChild("x","http://jabber.org/protocol/muc#user")
262 && "chat".equals(message.getAttribute("type"))) {
263 return null;
264 }
265 Conversation conversation = mXmppConnectionService
266 .findOrCreateConversation(account, fullJid.toBareJid(), false);
267 String pgpBody = getPgpBody(message);
268 Message finishedMessage;
269 if (pgpBody != null) {
270 finishedMessage = new Message(conversation, pgpBody,
271 Message.ENCRYPTION_PGP, status);
272 } else {
273 String body = message.findChild("body").getContent();
274 finishedMessage = new Message(conversation, body,
275 Message.ENCRYPTION_NONE, status);
276 }
277 finishedMessage.setTime(getTimestamp(message));
278 finishedMessage.setRemoteMsgId(message.getAttribute("id"));
279 finishedMessage.markable = isMarkable(message);
280 finishedMessage.setCounterpart(fullJid);
281 if (conversation.getMode() == Conversation.MODE_MULTI
282 && !fullJid.isBareJid()) {
283 finishedMessage.setType(Message.TYPE_PRIVATE);
284 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
285 .getTrueCounterpart(fullJid.getResourcepart()));
286 if (conversation.hasDuplicateMessage(finishedMessage)) {
287 return null;
288 }
289 }
290 return finishedMessage;
291 }
292
293 private Message parseMamMessage(MessagePacket packet, final Account account) {
294 final Element result = packet.findChild("result","urn:xmpp:mam:0");
295 if (result == null ) {
296 return null;
297 }
298 final MessageArchiveService.Query query = this.mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
299 if (query!=null) {
300 query.incrementTotalCount();
301 }
302 final Element forwarded = result.findChild("forwarded","urn:xmpp:forward:0");
303 if (forwarded == null) {
304 return null;
305 }
306 final Element message = forwarded.findChild("message");
307 if (message == null) {
308 return null;
309 }
310 final Element body = message.findChild("body");
311 if (body == null || message.hasChild("private","urn:xmpp:carbons:2") || message.hasChild("no-copy","urn:xmpp:hints")) {
312 return null;
313 }
314 int encryption;
315 String content = getPgpBody(message);
316 if (content != null) {
317 encryption = Message.ENCRYPTION_PGP;
318 } else {
319 encryption = Message.ENCRYPTION_NONE;
320 content = body.getContent();
321 }
322 if (content == null) {
323 return null;
324 }
325 final long timestamp = getTimestamp(forwarded);
326 final Jid to = message.getAttributeAsJid("to");
327 final Jid from = message.getAttributeAsJid("from");
328 Jid counterpart;
329 int status;
330 Conversation conversation;
331 if (from!=null && to != null && from.toBareJid().equals(account.getJid().toBareJid())) {
332 status = Message.STATUS_SEND;
333 conversation = this.mXmppConnectionService.findOrCreateConversation(account,to.toBareJid(),false,query);
334 counterpart = to;
335 } else if (from !=null && to != null) {
336 status = Message.STATUS_RECEIVED;
337 conversation = this.mXmppConnectionService.findOrCreateConversation(account,from.toBareJid(),false,query);
338 counterpart = from;
339 } else {
340 return null;
341 }
342 Message finishedMessage = new Message(conversation,content,encryption,status);
343 finishedMessage.setTime(timestamp);
344 finishedMessage.setCounterpart(counterpart);
345 finishedMessage.setRemoteMsgId(message.getAttribute("id"));
346 finishedMessage.setServerMsgId(result.getAttribute("id"));
347 if (conversation.hasDuplicateMessage(finishedMessage)) {
348 return null;
349 }
350 if (query!=null) {
351 query.incrementMessageCount();
352 }
353 return finishedMessage;
354 }
355
356 private void parseError(final MessagePacket packet, final Account account) {
357 final Jid from = packet.getFrom();
358 mXmppConnectionService.markMessage(account, from.toBareJid(),
359 packet.getId(), Message.STATUS_SEND_FAILED);
360 }
361
362 private void parseNonMessage(Element packet, Account account) {
363 final Jid from = packet.getAttributeAsJid("from");
364 Element invite = extractInvite(packet);
365 if (invite != null) {
366 Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, from, true);
367 if (!conversation.getMucOptions().online()) {
368 Element password = invite.findChild("password");
369 conversation.getMucOptions().setPassword(password == null ? null : password.getContent());
370 mXmppConnectionService.databaseBackend.updateConversation(conversation);
371 mXmppConnectionService.joinMuc(conversation);
372 mXmppConnectionService.updateConversationUi();
373 }
374 }
375 if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
376 Element event = packet.findChild("event",
377 "http://jabber.org/protocol/pubsub#event");
378 parseEvent(event, from, account);
379 } else if (from != null
380 && packet.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
381 String id = packet
382 .findChild("displayed", "urn:xmpp:chat-markers:0")
383 .getAttribute("id");
384 updateLastseen(packet, account, true);
385 mXmppConnectionService.markMessage(account, from.toBareJid(),
386 id, Message.STATUS_SEND_DISPLAYED);
387 } else if (from != null
388 && packet.hasChild("received", "urn:xmpp:chat-markers:0")) {
389 String id = packet.findChild("received", "urn:xmpp:chat-markers:0")
390 .getAttribute("id");
391 updateLastseen(packet, account, false);
392 mXmppConnectionService.markMessage(account, from.toBareJid(),
393 id, Message.STATUS_SEND_RECEIVED);
394 } else if (from != null
395 && packet.hasChild("received", "urn:xmpp:receipts")) {
396 String id = packet.findChild("received", "urn:xmpp:receipts")
397 .getAttribute("id");
398 updateLastseen(packet, account, false);
399 mXmppConnectionService.markMessage(account, from.toBareJid(),
400 id, Message.STATUS_SEND_RECEIVED);
401 }
402 }
403
404 private Element extractInvite(Element message) {
405 Element x = message.findChild("x","http://jabber.org/protocol/muc#user");
406 if (x == null) {
407 x = message.findChild("x","jabber:x:conference");
408 }
409 if (x != null && x.hasChild("invite")) {
410 return x;
411 } else {
412 return null;
413 }
414 }
415
416 private void parseEvent(final Element event, final Jid from, final Account account) {
417 Element items = event.findChild("items");
418 if (items == null) {
419 return;
420 }
421 String node = items.getAttribute("node");
422 if (node == null) {
423 return;
424 }
425 if (node.equals("urn:xmpp:avatar:metadata")) {
426 Avatar avatar = Avatar.parseMetadata(items);
427 if (avatar != null) {
428 avatar.owner = from;
429 if (mXmppConnectionService.getFileBackend().isAvatarCached(
430 avatar)) {
431 if (account.getJid().toBareJid().equals(from)) {
432 if (account.setAvatar(avatar.getFilename())) {
433 mXmppConnectionService.databaseBackend
434 .updateAccount(account);
435 }
436 mXmppConnectionService.getAvatarService().clear(
437 account);
438 mXmppConnectionService.updateConversationUi();
439 mXmppConnectionService.updateAccountUi();
440 } else {
441 Contact contact = account.getRoster().getContact(
442 from);
443 contact.setAvatar(avatar.getFilename());
444 mXmppConnectionService.getAvatarService().clear(
445 contact);
446 mXmppConnectionService.updateConversationUi();
447 mXmppConnectionService.updateRosterUi();
448 }
449 } else {
450 mXmppConnectionService.fetchAvatar(account, avatar);
451 }
452 }
453 } else if (node.equals("http://jabber.org/protocol/nick")) {
454 Element item = items.findChild("item");
455 if (item != null) {
456 Element nick = item.findChild("nick",
457 "http://jabber.org/protocol/nick");
458 if (nick != null) {
459 if (from != null) {
460 Contact contact = account.getRoster().getContact(
461 from);
462 contact.setPresenceName(nick.getContent());
463 mXmppConnectionService.getAvatarService().clear(account);
464 mXmppConnectionService.updateConversationUi();
465 mXmppConnectionService.updateAccountUi();
466 }
467 }
468 }
469 }
470 }
471
472 private String getPgpBody(Element message) {
473 Element child = message.findChild("x", "jabber:x:encrypted");
474 if (child == null) {
475 return null;
476 } else {
477 return child.getContent();
478 }
479 }
480
481 private boolean isMarkable(Element message) {
482 return message.hasChild("markable", "urn:xmpp:chat-markers:0");
483 }
484
485 @Override
486 public void onMessagePacketReceived(Account account, MessagePacket packet) {
487 Message message = null;
488 this.parseNick(packet, account);
489 if ((packet.getType() == MessagePacket.TYPE_CHAT || packet.getType() == MessagePacket.TYPE_NORMAL)) {
490 if ((packet.getBody() != null)
491 && (packet.getBody().startsWith("?OTR"))) {
492 message = this.parseOtrChat(packet, account);
493 if (message != null) {
494 message.markUnread();
495 }
496 } else if (packet.hasChild("body") && extractInvite(packet) == null) {
497 message = this.parseChat(packet, account);
498 if (message != null) {
499 message.markUnread();
500 }
501 } else if (packet.hasChild("received", "urn:xmpp:carbons:2")
502 || (packet.hasChild("sent", "urn:xmpp:carbons:2"))) {
503 message = this.parseCarbonMessage(packet, account);
504 if (message != null) {
505 if (message.getStatus() == Message.STATUS_SEND) {
506 account.activateGracePeriod();
507 mXmppConnectionService.markRead(message.getConversation());
508 } else {
509 message.markUnread();
510 }
511 }
512 } else if (packet.hasChild("result","urn:xmpp:mam:0")) {
513 message = parseMamMessage(packet, account);
514 if (message != null) {
515 Conversation conversation = message.getConversation();
516 conversation.add(message);
517 mXmppConnectionService.databaseBackend.createMessage(message);
518 }
519 return;
520 } else if (packet.hasChild("fin","urn:xmpp:mam:0")) {
521 Element fin = packet.findChild("fin","urn:xmpp:mam:0");
522 mXmppConnectionService.getMessageArchiveService().processFin(fin);
523 } else {
524 parseNonMessage(packet, account);
525 }
526 } else if (packet.getType() == MessagePacket.TYPE_GROUPCHAT) {
527 message = this.parseGroupchat(packet, account);
528 if (message != null) {
529 if (message.getStatus() == Message.STATUS_RECEIVED) {
530 message.markUnread();
531 } else {
532 mXmppConnectionService.markRead(message.getConversation());
533 account.activateGracePeriod();
534 }
535 }
536 } else if (packet.getType() == MessagePacket.TYPE_ERROR) {
537 this.parseError(packet, account);
538 return;
539 } else if (packet.getType() == MessagePacket.TYPE_HEADLINE) {
540 this.parseHeadline(packet, account);
541 return;
542 }
543 if ((message == null) || (message.getBody() == null)) {
544 return;
545 }
546 if ((mXmppConnectionService.confirmMessages())
547 && ((packet.getId() != null))) {
548 if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
549 MessagePacket receipt = mXmppConnectionService
550 .getMessageGenerator().received(account, packet,
551 "urn:xmpp:chat-markers:0");
552 mXmppConnectionService.sendMessagePacket(account, receipt);
553 }
554 if (packet.hasChild("request", "urn:xmpp:receipts")) {
555 MessagePacket receipt = mXmppConnectionService
556 .getMessageGenerator().received(account, packet,
557 "urn:xmpp:receipts");
558 mXmppConnectionService.sendMessagePacket(account, receipt);
559 }
560 }
561 Conversation conversation = message.getConversation();
562 conversation.add(message);
563 if (account.getXmppConnection() != null && account.getXmppConnection().getFeatures().advancedStreamFeaturesLoaded()) {
564 if (conversation.setLastMessageTransmitted(System.currentTimeMillis())) {
565 mXmppConnectionService.updateConversation(conversation);
566 }
567 }
568
569 if (message.getStatus() == Message.STATUS_RECEIVED
570 && conversation.getOtrSession() != null
571 && !conversation.getOtrSession().getSessionID().getUserID()
572 .equals(message.getCounterpart().getResourcepart())) {
573 conversation.endOtrIfNeeded();
574 }
575
576 if (packet.getType() != MessagePacket.TYPE_ERROR) {
577 if (message.getEncryption() == Message.ENCRYPTION_NONE
578 || mXmppConnectionService.saveEncryptedMessages()) {
579 mXmppConnectionService.databaseBackend.createMessage(message);
580 }
581 }
582 final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
583 if (message.trusted() && message.bodyContainsDownloadable() && manager.getAutoAcceptFileSize() > 0) {
584 manager.createNewConnection(message);
585 } else if (!message.isRead()) {
586 mXmppConnectionService.getNotificationService().push(message);
587 }
588 mXmppConnectionService.updateConversationUi();
589 }
590
591 private void parseHeadline(MessagePacket packet, Account account) {
592 if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
593 Element event = packet.findChild("event",
594 "http://jabber.org/protocol/pubsub#event");
595 parseEvent(event, packet.getFrom(), account);
596 }
597 }
598
599 private void parseNick(MessagePacket packet, Account account) {
600 Element nick = packet.findChild("nick",
601 "http://jabber.org/protocol/nick");
602 if (nick != null) {
603 if (packet.getFrom() != null) {
604 Contact contact = account.getRoster().getContact(
605 packet.getFrom());
606 contact.setPresenceName(nick.getContent());
607 }
608 }
609 }
610}