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