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 return null;
165 }
166
167 if (from.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
168 if (mXmppConnectionService.markMessage(conversation,
169 packet.getId(), Message.STATUS_SEND_RECEIVED)) {
170 return null;
171 } else if (packet.getId() == null) {
172 Message message = conversation.findSentMessageWithBody(packet.getBody());
173 if (message != null) {
174 mXmppConnectionService.markMessage(message,Message.STATUS_SEND_RECEIVED);
175 return null;
176 } else {
177 status = Message.STATUS_SEND;
178 }
179 } else {
180 status = Message.STATUS_SEND;
181 }
182 } else {
183 status = Message.STATUS_RECEIVED;
184 }
185 String pgpBody = getPgpBody(packet);
186 Message finishedMessage;
187 if (pgpBody == null) {
188 finishedMessage = new Message(conversation,
189 packet.getBody(), Message.ENCRYPTION_NONE, status);
190 } else {
191 finishedMessage = new Message(conversation, pgpBody,
192 Message.ENCRYPTION_PGP, status);
193 }
194 finishedMessage.setRemoteMsgId(packet.getId());
195 finishedMessage.markable = isMarkable(packet);
196 finishedMessage.setCounterpart(from);
197 if (status == Message.STATUS_RECEIVED) {
198 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
199 .getTrueCounterpart(from.getResourcepart()));
200 }
201 if (packet.hasChild("delay")
202 && conversation.hasDuplicateMessage(finishedMessage)) {
203 return null;
204 }
205 finishedMessage.setTime(getTimestamp(packet));
206 return finishedMessage;
207 }
208
209 private Message parseCarbonMessage(final MessagePacket packet, final Account account) {
210 int status;
211 final Jid fullJid;
212 Element forwarded;
213 if (packet.hasChild("received", "urn:xmpp:carbons:2")) {
214 forwarded = packet.findChild("received", "urn:xmpp:carbons:2")
215 .findChild("forwarded", "urn:xmpp:forward:0");
216 status = Message.STATUS_RECEIVED;
217 } else if (packet.hasChild("sent", "urn:xmpp:carbons:2")) {
218 forwarded = packet.findChild("sent", "urn:xmpp:carbons:2")
219 .findChild("forwarded", "urn:xmpp:forward:0");
220 status = Message.STATUS_SEND;
221 } else {
222 return null;
223 }
224 if (forwarded == null) {
225 return null;
226 }
227 Element message = forwarded.findChild("message");
228 if (message == null) {
229 return null;
230 }
231 if (!message.hasChild("body")) {
232 if (status == Message.STATUS_RECEIVED
233 && message.getAttribute("from") != null) {
234 parseNonMessage(message, account);
235 } else if (status == Message.STATUS_SEND
236 && message.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
237 final Jid to = message.getAttributeAsJid("to");
238 if (to != null) {
239 final Conversation conversation = mXmppConnectionService.find(
240 mXmppConnectionService.getConversations(), account,
241 to.toBareJid());
242 if (conversation != null) {
243 mXmppConnectionService.markRead(conversation);
244 }
245 }
246 }
247 return null;
248 }
249 if (status == Message.STATUS_RECEIVED) {
250 fullJid = message.getAttributeAsJid("from");
251 if (fullJid == null) {
252 return null;
253 } else {
254 updateLastseen(message, account, true);
255 }
256 } else {
257 fullJid = message.getAttributeAsJid("to");
258 if (fullJid == null) {
259 return null;
260 }
261 }
262 if (message.hasChild("x","http://jabber.org/protocol/muc#user")
263 && "chat".equals(message.getAttribute("type"))) {
264 return null;
265 }
266 Conversation conversation = mXmppConnectionService
267 .findOrCreateConversation(account, fullJid.toBareJid(), false);
268 String pgpBody = getPgpBody(message);
269 Message finishedMessage;
270 if (pgpBody != null) {
271 finishedMessage = new Message(conversation, pgpBody,
272 Message.ENCRYPTION_PGP, status);
273 } else {
274 String body = message.findChild("body").getContent();
275 finishedMessage = new Message(conversation, body,
276 Message.ENCRYPTION_NONE, status);
277 }
278 finishedMessage.setTime(getTimestamp(message));
279 finishedMessage.setRemoteMsgId(message.getAttribute("id"));
280 finishedMessage.markable = isMarkable(message);
281 finishedMessage.setCounterpart(fullJid);
282 if (conversation.getMode() == Conversation.MODE_MULTI
283 && !fullJid.isBareJid()) {
284 finishedMessage.setType(Message.TYPE_PRIVATE);
285 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
286 .getTrueCounterpart(fullJid.getResourcepart()));
287 if (conversation.hasDuplicateMessage(finishedMessage)) {
288 return null;
289 }
290 }
291 return finishedMessage;
292 }
293
294 private Message parseMamMessage(MessagePacket packet, final Account account) {
295 final Element result = packet.findChild("result","urn:xmpp:mam:0");
296 if (result == null ) {
297 return null;
298 }
299 final MessageArchiveService.Query query = this.mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
300 if (query!=null) {
301 query.incrementTotalCount();
302 }
303 final Element forwarded = result.findChild("forwarded","urn:xmpp:forward:0");
304 if (forwarded == null) {
305 return null;
306 }
307 final Element message = forwarded.findChild("message");
308 if (message == null) {
309 return null;
310 }
311 final Element body = message.findChild("body");
312 if (body == null || message.hasChild("private","urn:xmpp:carbons:2") || message.hasChild("no-copy","urn:xmpp:hints")) {
313 return null;
314 }
315 int encryption;
316 String content = getPgpBody(message);
317 if (content != null) {
318 encryption = Message.ENCRYPTION_PGP;
319 } else {
320 encryption = Message.ENCRYPTION_NONE;
321 content = body.getContent();
322 }
323 if (content == null) {
324 return null;
325 }
326 final long timestamp = getTimestamp(forwarded);
327 final Jid to = message.getAttributeAsJid("to");
328 final Jid from = message.getAttributeAsJid("from");
329 Jid counterpart;
330 int status;
331 Conversation conversation;
332 if (from!=null && to != null && from.toBareJid().equals(account.getJid().toBareJid())) {
333 status = Message.STATUS_SEND;
334 conversation = this.mXmppConnectionService.findOrCreateConversation(account,to.toBareJid(),false,query);
335 counterpart = to;
336 } else if (from !=null && to != null) {
337 status = Message.STATUS_RECEIVED;
338 conversation = this.mXmppConnectionService.findOrCreateConversation(account,from.toBareJid(),false,query);
339 counterpart = from;
340 } else {
341 return null;
342 }
343 Message finishedMessage = new Message(conversation,content,encryption,status);
344 finishedMessage.setTime(timestamp);
345 finishedMessage.setCounterpart(counterpart);
346 finishedMessage.setRemoteMsgId(message.getAttribute("id"));
347 finishedMessage.setServerMsgId(result.getAttribute("id"));
348 if (conversation.hasDuplicateMessage(finishedMessage)) {
349 return null;
350 }
351 if (query!=null) {
352 query.incrementMessageCount();
353 }
354 return finishedMessage;
355 }
356
357 private void parseError(final MessagePacket packet, final Account account) {
358 final Jid from = packet.getFrom();
359 mXmppConnectionService.markMessage(account, from.toBareJid(),
360 packet.getId(), Message.STATUS_SEND_FAILED);
361 }
362
363 private void parseNonMessage(Element packet, Account account) {
364 final Jid from = packet.getAttributeAsJid("from");
365 Element invite = extractInvite(packet);
366 if (invite != null) {
367 Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, from, true);
368 if (!conversation.getMucOptions().online()) {
369 Element password = invite.findChild("password");
370 conversation.getMucOptions().setPassword(password == null ? null : password.getContent());
371 mXmppConnectionService.databaseBackend.updateConversation(conversation);
372 mXmppConnectionService.joinMuc(conversation);
373 mXmppConnectionService.updateConversationUi();
374 }
375 }
376 if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
377 Element event = packet.findChild("event",
378 "http://jabber.org/protocol/pubsub#event");
379 parseEvent(event, from, account);
380 } else if (from != null
381 && packet.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
382 String id = packet
383 .findChild("displayed", "urn:xmpp:chat-markers:0")
384 .getAttribute("id");
385 updateLastseen(packet, account, true);
386 mXmppConnectionService.markMessage(account, from.toBareJid(),
387 id, Message.STATUS_SEND_DISPLAYED);
388 } else if (from != null
389 && packet.hasChild("received", "urn:xmpp:chat-markers:0")) {
390 String id = packet.findChild("received", "urn:xmpp:chat-markers:0")
391 .getAttribute("id");
392 updateLastseen(packet, account, false);
393 mXmppConnectionService.markMessage(account, from.toBareJid(),
394 id, Message.STATUS_SEND_RECEIVED);
395 } else if (from != null
396 && packet.hasChild("received", "urn:xmpp:receipts")) {
397 String id = packet.findChild("received", "urn:xmpp:receipts")
398 .getAttribute("id");
399 updateLastseen(packet, account, false);
400 mXmppConnectionService.markMessage(account, from.toBareJid(),
401 id, Message.STATUS_SEND_RECEIVED);
402 }
403 }
404
405 private Element extractInvite(Element message) {
406 Element x = message.findChild("x","http://jabber.org/protocol/muc#user");
407 if (x == null) {
408 x = message.findChild("x","jabber:x:conference");
409 }
410 if (x != null && x.hasChild("invite")) {
411 return x;
412 } else {
413 return null;
414 }
415 }
416
417 private void parseEvent(final Element event, final Jid from, final Account account) {
418 Element items = event.findChild("items");
419 if (items == null) {
420 return;
421 }
422 String node = items.getAttribute("node");
423 if (node == null) {
424 return;
425 }
426 if (node.equals("urn:xmpp:avatar:metadata")) {
427 Avatar avatar = Avatar.parseMetadata(items);
428 if (avatar != null) {
429 avatar.owner = from;
430 if (mXmppConnectionService.getFileBackend().isAvatarCached(
431 avatar)) {
432 if (account.getJid().toBareJid().equals(from)) {
433 if (account.setAvatar(avatar.getFilename())) {
434 mXmppConnectionService.databaseBackend
435 .updateAccount(account);
436 }
437 mXmppConnectionService.getAvatarService().clear(
438 account);
439 mXmppConnectionService.updateConversationUi();
440 mXmppConnectionService.updateAccountUi();
441 } else {
442 Contact contact = account.getRoster().getContact(
443 from);
444 contact.setAvatar(avatar.getFilename());
445 mXmppConnectionService.getAvatarService().clear(
446 contact);
447 mXmppConnectionService.updateConversationUi();
448 mXmppConnectionService.updateRosterUi();
449 }
450 } else {
451 mXmppConnectionService.fetchAvatar(account, avatar);
452 }
453 }
454 } else if (node.equals("http://jabber.org/protocol/nick")) {
455 Element item = items.findChild("item");
456 if (item != null) {
457 Element nick = item.findChild("nick",
458 "http://jabber.org/protocol/nick");
459 if (nick != null) {
460 if (from != null) {
461 Contact contact = account.getRoster().getContact(
462 from);
463 contact.setPresenceName(nick.getContent());
464 mXmppConnectionService.getAvatarService().clear(account);
465 mXmppConnectionService.updateConversationUi();
466 mXmppConnectionService.updateAccountUi();
467 }
468 }
469 }
470 }
471 }
472
473 private String getPgpBody(Element message) {
474 Element child = message.findChild("x", "jabber:x:encrypted");
475 if (child == null) {
476 return null;
477 } else {
478 return child.getContent();
479 }
480 }
481
482 private boolean isMarkable(Element message) {
483 return message.hasChild("markable", "urn:xmpp:chat-markers:0");
484 }
485
486 @Override
487 public void onMessagePacketReceived(Account account, MessagePacket packet) {
488 Message message = null;
489 this.parseNick(packet, account);
490 if ((packet.getType() == MessagePacket.TYPE_CHAT || packet.getType() == MessagePacket.TYPE_NORMAL)) {
491 if ((packet.getBody() != null)
492 && (packet.getBody().startsWith("?OTR"))) {
493 message = this.parseOtrChat(packet, account);
494 if (message != null) {
495 message.markUnread();
496 }
497 } else if (packet.hasChild("body") && extractInvite(packet) == null) {
498 message = this.parseChat(packet, account);
499 if (message != null) {
500 message.markUnread();
501 }
502 } else if (packet.hasChild("received", "urn:xmpp:carbons:2")
503 || (packet.hasChild("sent", "urn:xmpp:carbons:2"))) {
504 message = this.parseCarbonMessage(packet, account);
505 if (message != null) {
506 if (message.getStatus() == Message.STATUS_SEND) {
507 account.activateGracePeriod();
508 mXmppConnectionService.markRead(message.getConversation());
509 } else {
510 message.markUnread();
511 }
512 }
513 } else if (packet.hasChild("result","urn:xmpp:mam:0")) {
514 message = parseMamMessage(packet, account);
515 if (message != null) {
516 Conversation conversation = message.getConversation();
517 conversation.add(message);
518 mXmppConnectionService.databaseBackend.createMessage(message);
519 }
520 return;
521 } else if (packet.hasChild("fin","urn:xmpp:mam:0")) {
522 Element fin = packet.findChild("fin","urn:xmpp:mam:0");
523 mXmppConnectionService.getMessageArchiveService().processFin(fin);
524 } else {
525 parseNonMessage(packet, account);
526 }
527 } else if (packet.getType() == MessagePacket.TYPE_GROUPCHAT) {
528 message = this.parseGroupchat(packet, account);
529 if (message != null) {
530 if (message.getStatus() == Message.STATUS_RECEIVED) {
531 message.markUnread();
532 } else {
533 mXmppConnectionService.markRead(message.getConversation());
534 account.activateGracePeriod();
535 }
536 }
537 } else if (packet.getType() == MessagePacket.TYPE_ERROR) {
538 this.parseError(packet, account);
539 return;
540 } else if (packet.getType() == MessagePacket.TYPE_HEADLINE) {
541 this.parseHeadline(packet, account);
542 return;
543 }
544 if ((message == null) || (message.getBody() == null)) {
545 return;
546 }
547 if ((mXmppConnectionService.confirmMessages())
548 && ((packet.getId() != null))) {
549 if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
550 MessagePacket receipt = mXmppConnectionService
551 .getMessageGenerator().received(account, packet,
552 "urn:xmpp:chat-markers:0");
553 mXmppConnectionService.sendMessagePacket(account, receipt);
554 }
555 if (packet.hasChild("request", "urn:xmpp:receipts")) {
556 MessagePacket receipt = mXmppConnectionService
557 .getMessageGenerator().received(account, packet,
558 "urn:xmpp:receipts");
559 mXmppConnectionService.sendMessagePacket(account, receipt);
560 }
561 }
562 Conversation conversation = message.getConversation();
563 conversation.add(message);
564 if (account.getXmppConnection() != null && account.getXmppConnection().getFeatures().advancedStreamFeaturesLoaded()) {
565 if (conversation.setLastMessageTransmitted(System.currentTimeMillis())) {
566 mXmppConnectionService.updateConversation(conversation);
567 }
568 }
569
570 if (message.getStatus() == Message.STATUS_RECEIVED
571 && conversation.getOtrSession() != null
572 && !conversation.getOtrSession().getSessionID().getUserID()
573 .equals(message.getCounterpart().getResourcepart())) {
574 conversation.endOtrIfNeeded();
575 }
576
577 if (packet.getType() != MessagePacket.TYPE_ERROR) {
578 if (message.getEncryption() == Message.ENCRYPTION_NONE
579 || mXmppConnectionService.saveEncryptedMessages()) {
580 mXmppConnectionService.databaseBackend.createMessage(message);
581 }
582 }
583 final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
584 if (message.trusted() && message.bodyContainsDownloadable() && manager.getAutoAcceptFileSize() > 0) {
585 manager.createNewConnection(message);
586 } else if (!message.isRead()) {
587 mXmppConnectionService.getNotificationService().push(message);
588 }
589 mXmppConnectionService.updateConversationUi();
590 }
591
592 private void parseHeadline(MessagePacket packet, Account account) {
593 if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
594 Element event = packet.findChild("event",
595 "http://jabber.org/protocol/pubsub#event");
596 parseEvent(event, packet.getFrom(), account);
597 }
598 }
599
600 private void parseNick(MessagePacket packet, Account account) {
601 Element nick = packet.findChild("nick",
602 "http://jabber.org/protocol/nick");
603 if (nick != null) {
604 if (packet.getFrom() != null) {
605 Contact contact = account.getRoster().getContact(
606 packet.getFrom());
607 contact.setPresenceName(nick.getContent());
608 }
609 }
610 }
611}