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