1package eu.siacs.conversations.parser;
2
3import android.util.Log;
4
5import net.java.otr4j.session.Session;
6import net.java.otr4j.session.SessionStatus;
7
8import eu.siacs.conversations.Config;
9import eu.siacs.conversations.entities.Account;
10import eu.siacs.conversations.entities.Contact;
11import eu.siacs.conversations.entities.Conversation;
12import eu.siacs.conversations.entities.Message;
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.InvalidJidException;
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 boolean properlyAddressed = (!packet.getTo().isBareJid())
64 || (account.countPresences() == 1);
65 final Jid from = packet.getFrom();
66 if (from == null) {
67 return null;
68 }
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 String receivedId = packet.getId();
128 if (receivedId != null) {
129 mXmppConnectionService.replyWithNotAcceptable(account, packet);
130 }
131 conversation.resetOtrSession();
132 return null;
133 }
134 }
135
136 private Message parseGroupchat(MessagePacket packet, Account account) {
137 int status;
138 final Jid from = packet.getFrom();
139 if (from == null) {
140 return null;
141 }
142 if (mXmppConnectionService.find(account.pendingConferenceLeaves,
143 account, from.toBareJid()) != null) {
144 return null;
145 }
146 Conversation conversation = mXmppConnectionService
147 .findOrCreateConversation(account, from.toBareJid(), true);
148 if (packet.hasChild("subject")) {
149 conversation.getMucOptions().setSubject(
150 packet.findChild("subject").getContent());
151 mXmppConnectionService.updateConversationUi();
152 return null;
153 }
154 if (from.isBareJid()) {
155 return null;
156 }
157 if (from.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
158 if (mXmppConnectionService.markMessage(conversation,
159 packet.getId(), Message.STATUS_SEND)) {
160 return null;
161 } else {
162 status = Message.STATUS_SEND;
163 }
164 } else {
165 status = Message.STATUS_RECEIVED;
166 }
167 String pgpBody = getPgpBody(packet);
168 Message finishedMessage;
169 if (pgpBody == null) {
170 finishedMessage = new Message(conversation,
171 packet.getBody(), Message.ENCRYPTION_NONE, status);
172 } else {
173 finishedMessage = new Message(conversation, pgpBody,
174 Message.ENCRYPTION_PGP, status);
175 }
176 finishedMessage.setRemoteMsgId(packet.getId());
177 finishedMessage.markable = isMarkable(packet);
178 finishedMessage.setCounterpart(from);
179 if (status == Message.STATUS_RECEIVED) {
180 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
181 .getTrueCounterpart(from.getResourcepart()));
182 }
183 if (packet.hasChild("delay")
184 && conversation.hasDuplicateMessage(finishedMessage)) {
185 return null;
186 }
187 finishedMessage.setTime(getTimestamp(packet));
188 return finishedMessage;
189 }
190
191 private Message parseCarbonMessage(final MessagePacket packet, final Account account) {
192 int status;
193 final Jid fullJid;
194 Element forwarded;
195 if (packet.hasChild("received", "urn:xmpp:carbons:2")) {
196 forwarded = packet.findChild("received", "urn:xmpp:carbons:2")
197 .findChild("forwarded", "urn:xmpp:forward:0");
198 status = Message.STATUS_RECEIVED;
199 } else if (packet.hasChild("sent", "urn:xmpp:carbons:2")) {
200 forwarded = packet.findChild("sent", "urn:xmpp:carbons:2")
201 .findChild("forwarded", "urn:xmpp:forward:0");
202 status = Message.STATUS_SEND;
203 } else {
204 return null;
205 }
206 if (forwarded == null) {
207 return null;
208 }
209 Element message = forwarded.findChild("message");
210 if (message == null) {
211 return null;
212 }
213 if (!message.hasChild("body")) {
214 if (status == Message.STATUS_RECEIVED
215 && message.getAttribute("from") != null) {
216 parseNonMessage(message, account);
217 } else if (status == Message.STATUS_SEND
218 && message.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
219 final Jid to = message.getAttributeAsJid("to");
220 if (to != null) {
221 final Conversation conversation = mXmppConnectionService.find(
222 mXmppConnectionService.getConversations(), account,
223 to.toBareJid());
224 if (conversation != null) {
225 mXmppConnectionService.markRead(conversation, false);
226 }
227 }
228 }
229 return null;
230 }
231 if (status == Message.STATUS_RECEIVED) {
232 fullJid = message.getAttributeAsJid("from");
233 if (fullJid == null) {
234 return null;
235 } else {
236 updateLastseen(message, account, true);
237 }
238 } else {
239 fullJid = message.getAttributeAsJid("to");
240 if (fullJid == null) {
241 return null;
242 }
243 }
244 Conversation conversation = mXmppConnectionService
245 .findOrCreateConversation(account, fullJid.toBareJid(), false);
246 String pgpBody = getPgpBody(message);
247 Message finishedMessage;
248 if (pgpBody != null) {
249 finishedMessage = new Message(conversation, pgpBody,
250 Message.ENCRYPTION_PGP, status);
251 } else {
252 String body = message.findChild("body").getContent();
253 finishedMessage = new Message(conversation, body,
254 Message.ENCRYPTION_NONE, status);
255 }
256 finishedMessage.setTime(getTimestamp(message));
257 finishedMessage.setRemoteMsgId(message.getAttribute("id"));
258 finishedMessage.markable = isMarkable(message);
259 finishedMessage.setCounterpart(fullJid);
260 if (conversation.getMode() == Conversation.MODE_MULTI
261 && !fullJid.isBareJid()) {
262 finishedMessage.setType(Message.TYPE_PRIVATE);
263 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
264 .getTrueCounterpart(fullJid.getResourcepart()));
265 if (conversation.hasDuplicateMessage(finishedMessage)) {
266 return null;
267 }
268 }
269 return finishedMessage;
270 }
271
272 private void parseError(final MessagePacket packet, final Account account) {
273 final Jid from = packet.getFrom();
274 mXmppConnectionService.markMessage(account, from.toBareJid(),
275 packet.getId(), Message.STATUS_SEND_FAILED);
276 }
277
278 private void parseNonMessage(Element packet, Account account) {
279 final Jid from = packet.getAttributeAsJid("from");
280 if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
281 Element event = packet.findChild("event",
282 "http://jabber.org/protocol/pubsub#event");
283 parseEvent(event, from, account);
284 } else if (from != null
285 && packet.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
286 String id = packet
287 .findChild("displayed", "urn:xmpp:chat-markers:0")
288 .getAttribute("id");
289 updateLastseen(packet, account, true);
290 mXmppConnectionService.markMessage(account, from.toBareJid(),
291 id, Message.STATUS_SEND_DISPLAYED);
292 } else if (from != null
293 && packet.hasChild("received", "urn:xmpp:chat-markers:0")) {
294 String id = packet.findChild("received", "urn:xmpp:chat-markers:0")
295 .getAttribute("id");
296 updateLastseen(packet, account, false);
297 mXmppConnectionService.markMessage(account, from.toBareJid(),
298 id, Message.STATUS_SEND_RECEIVED);
299 } else if (from != null
300 && packet.hasChild("received", "urn:xmpp:receipts")) {
301 String id = packet.findChild("received", "urn:xmpp:receipts")
302 .getAttribute("id");
303 updateLastseen(packet, account, false);
304 mXmppConnectionService.markMessage(account, from.toBareJid(),
305 id, Message.STATUS_SEND_RECEIVED);
306 } else if (packet.hasChild("x", "http://jabber.org/protocol/muc#user")) {
307 Element x = packet.findChild("x",
308 "http://jabber.org/protocol/muc#user");
309 if (x.hasChild("invite")) {
310 Conversation conversation = mXmppConnectionService
311 .findOrCreateConversation(account,
312 packet.getAttributeAsJid("from"), true);
313 if (!conversation.getMucOptions().online()) {
314 if (x.hasChild("password")) {
315 Element password = x.findChild("password");
316 conversation.getMucOptions().setPassword(
317 password.getContent());
318 mXmppConnectionService.databaseBackend
319 .updateConversation(conversation);
320 }
321 mXmppConnectionService.joinMuc(conversation);
322 mXmppConnectionService.updateConversationUi();
323 }
324 }
325 } else if (packet.hasChild("x", "jabber:x:conference")) {
326 Element x = packet.findChild("x", "jabber:x:conference");
327 Jid jid = x.getAttributeAsJid("jid");
328 String password = x.getAttribute("password");
329 if (jid != null) {
330 Conversation conversation = mXmppConnectionService
331 .findOrCreateConversation(account, jid, true);
332 if (!conversation.getMucOptions().online()) {
333 if (password != null) {
334 conversation.getMucOptions().setPassword(password);
335 mXmppConnectionService.databaseBackend
336 .updateConversation(conversation);
337 }
338 mXmppConnectionService.joinMuc(conversation);
339 mXmppConnectionService.updateConversationUi();
340 }
341 }
342 }
343 }
344
345 private void parseEvent(final Element event, final Jid from, final Account account) {
346 Element items = event.findChild("items");
347 if (items == null) {
348 return;
349 }
350 String node = items.getAttribute("node");
351 if (node == null) {
352 return;
353 }
354 if (node.equals("urn:xmpp:avatar:metadata")) {
355 Avatar avatar = Avatar.parseMetadata(items);
356 if (avatar != null) {
357 avatar.owner = from;
358 if (mXmppConnectionService.getFileBackend().isAvatarCached(
359 avatar)) {
360 if (account.getJid().toBareJid().equals(from)) {
361 if (account.setAvatar(avatar.getFilename())) {
362 mXmppConnectionService.databaseBackend
363 .updateAccount(account);
364 }
365 mXmppConnectionService.getAvatarService().clear(
366 account);
367 mXmppConnectionService.updateConversationUi();
368 mXmppConnectionService.updateAccountUi();
369 } else {
370 Contact contact = account.getRoster().getContact(
371 from);
372 contact.setAvatar(avatar.getFilename());
373 mXmppConnectionService.getAvatarService().clear(
374 contact);
375 mXmppConnectionService.updateConversationUi();
376 mXmppConnectionService.updateRosterUi();
377 }
378 } else {
379 mXmppConnectionService.fetchAvatar(account, avatar);
380 }
381 }
382 } else if (node.equals("http://jabber.org/protocol/nick")) {
383 Element item = items.findChild("item");
384 if (item != null) {
385 Element nick = item.findChild("nick",
386 "http://jabber.org/protocol/nick");
387 if (nick != null) {
388 if (from != null) {
389 Contact contact = account.getRoster().getContact(
390 from);
391 contact.setPresenceName(nick.getContent());
392 mXmppConnectionService.getAvatarService().clear(account);
393 mXmppConnectionService.updateConversationUi();
394 mXmppConnectionService.updateAccountUi();
395 }
396 }
397 }
398 }
399 }
400
401 private String getPgpBody(Element message) {
402 Element child = message.findChild("x", "jabber:x:encrypted");
403 if (child == null) {
404 return null;
405 } else {
406 return child.getContent();
407 }
408 }
409
410 private boolean isMarkable(Element message) {
411 return message.hasChild("markable", "urn:xmpp:chat-markers:0");
412 }
413
414 @Override
415 public void onMessagePacketReceived(Account account, MessagePacket packet) {
416 Message message = null;
417 this.parseNick(packet, account);
418
419 if ((packet.getType() == MessagePacket.TYPE_CHAT || packet.getType() == MessagePacket.TYPE_NORMAL)) {
420 if ((packet.getBody() != null)
421 && (packet.getBody().startsWith("?OTR"))) {
422 message = this.parseOtrChat(packet, account);
423 if (message != null) {
424 message.markUnread();
425 }
426 } else if (packet.hasChild("body")
427 && !(packet.hasChild("x",
428 "http://jabber.org/protocol/muc#user"))) {
429 message = this.parseChat(packet, account);
430 if (message != null) {
431 message.markUnread();
432 }
433 } else if (packet.hasChild("received", "urn:xmpp:carbons:2")
434 || (packet.hasChild("sent", "urn:xmpp:carbons:2"))) {
435 message = this.parseCarbonMessage(packet, account);
436 if (message != null) {
437 if (message.getStatus() == Message.STATUS_SEND) {
438 account.activateGracePeriod();
439 mXmppConnectionService.markRead(
440 message.getConversation(), false);
441 } else {
442 message.markUnread();
443 }
444 }
445 } else {
446 parseNonMessage(packet, account);
447 }
448 } else if (packet.getType() == MessagePacket.TYPE_GROUPCHAT) {
449 message = this.parseGroupchat(packet, account);
450 if (message != null) {
451 if (message.getStatus() == Message.STATUS_RECEIVED) {
452 message.markUnread();
453 } else {
454 mXmppConnectionService.markRead(message.getConversation(),
455 false);
456 account.activateGracePeriod();
457 }
458 }
459 } else if (packet.getType() == MessagePacket.TYPE_ERROR) {
460 this.parseError(packet, account);
461 return;
462 } else if (packet.getType() == MessagePacket.TYPE_HEADLINE) {
463 this.parseHeadline(packet, account);
464 return;
465 }
466 if ((message == null) || (message.getBody() == null)) {
467 return;
468 }
469 if ((mXmppConnectionService.confirmMessages())
470 && ((packet.getId() != null))) {
471 if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
472 MessagePacket receipt = mXmppConnectionService
473 .getMessageGenerator().received(account, packet,
474 "urn:xmpp:chat-markers:0");
475 mXmppConnectionService.sendMessagePacket(account, receipt);
476 }
477 if (packet.hasChild("request", "urn:xmpp:receipts")) {
478 MessagePacket receipt = mXmppConnectionService
479 .getMessageGenerator().received(account, packet,
480 "urn:xmpp:receipts");
481 mXmppConnectionService.sendMessagePacket(account, receipt);
482 }
483 }
484 Conversation conversation = message.getConversation();
485 conversation.add(message);
486
487 if (message.getStatus() == Message.STATUS_RECEIVED
488 && conversation.getOtrSession() != null
489 && !conversation.getOtrSession().getSessionID().getUserID()
490 .equals(message.getCounterpart().getResourcepart())) {
491 Log.d(Config.LOGTAG, "ending because of reasons");
492 conversation.endOtrIfNeeded();
493 }
494
495 if (packet.getType() != MessagePacket.TYPE_ERROR) {
496 if (message.getEncryption() == Message.ENCRYPTION_NONE
497 || mXmppConnectionService.saveEncryptedMessages()) {
498 mXmppConnectionService.databaseBackend.createMessage(message);
499 }
500 }
501 if (message.trusted() && message.bodyContainsDownloadable()) {
502 this.mXmppConnectionService.getHttpConnectionManager()
503 .createNewConnection(message);
504 } else {
505 mXmppConnectionService.getNotificationService().push(message);
506 }
507 mXmppConnectionService.updateConversationUi();
508 }
509
510 private void parseHeadline(MessagePacket packet, Account account) {
511 if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
512 Element event = packet.findChild("event",
513 "http://jabber.org/protocol/pubsub#event");
514 parseEvent(event, packet.getFrom(), account);
515 }
516 }
517
518 private void parseNick(MessagePacket packet, Account account) {
519 Element nick = packet.findChild("nick",
520 "http://jabber.org/protocol/nick");
521 if (nick != null) {
522 if (packet.getFrom() != null) {
523 Contact contact = account.getRoster().getContact(
524 packet.getFrom());
525 contact.setPresenceName(nick.getContent());
526 }
527 }
528 }
529}