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 Conversation conversation = mXmppConnectionService
31 .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 boolean properlyAddressed = (!packet.getTo().isBareJid())
62 || (account.countPresences() == 1);
63 final Jid from = packet.getFrom();
64 Conversation conversation = mXmppConnectionService
65 .findOrCreateConversation(account, from.toBareJid(), false);
66 String presence;
67 if (from.isBareJid()) {
68 presence = "";
69 } else {
70 presence = from.getResourcepart();
71 }
72 updateLastseen(packet, account, true);
73 String body = packet.getBody();
74 if (body.matches("^\\?OTRv\\d*\\?")) {
75 conversation.endOtrIfNeeded();
76 }
77 if (!conversation.hasValidOtrSession()) {
78 if (properlyAddressed) {
79 conversation.startOtrSession(mXmppConnectionService, presence,
80 false);
81 } else {
82 return null;
83 }
84 } else {
85 String foreignPresence = conversation.getOtrSession()
86 .getSessionID().getUserID();
87 if (!foreignPresence.equals(presence)) {
88 conversation.endOtrIfNeeded();
89 if (properlyAddressed) {
90 conversation.startOtrSession(mXmppConnectionService,
91 presence, false);
92 } else {
93 return null;
94 }
95 }
96 }
97 try {
98 Session otrSession = conversation.getOtrSession();
99 SessionStatus before = otrSession.getSessionStatus();
100 body = otrSession.transformReceiving(body);
101 SessionStatus after = otrSession.getSessionStatus();
102 if ((before != after) && (after == SessionStatus.ENCRYPTED)) {
103 mXmppConnectionService.onOtrSessionEstablished(conversation);
104 } else if ((before != after) && (after == SessionStatus.FINISHED)) {
105 conversation.resetOtrSession();
106 mXmppConnectionService.updateConversationUi();
107 }
108 if ((body == null) || (body.isEmpty())) {
109 return null;
110 }
111 if (body.startsWith(CryptoHelper.FILETRANSFER)) {
112 String key = body.substring(CryptoHelper.FILETRANSFER.length());
113 conversation.setSymmetricKey(CryptoHelper.hexToBytes(key));
114 return null;
115 }
116 Message finishedMessage = new Message(conversation, body, Message.ENCRYPTION_OTR,
117 Message.STATUS_RECEIVED);
118 finishedMessage.setTime(getTimestamp(packet));
119 finishedMessage.setRemoteMsgId(packet.getId());
120 finishedMessage.markable = isMarkable(packet);
121 finishedMessage.setCounterpart(from);
122 return finishedMessage;
123 } catch (Exception e) {
124 String receivedId = packet.getId();
125 if (receivedId != null) {
126 mXmppConnectionService.replyWithNotAcceptable(account, packet);
127 }
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 (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(
144 packet.findChild("subject").getContent());
145 mXmppConnectionService.updateConversationUi();
146 return null;
147 }
148 if (from.isBareJid()) {
149 return null;
150 }
151 if (from.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
152 if (mXmppConnectionService.markMessage(conversation,
153 packet.getId(), Message.STATUS_SEND)) {
154 return null;
155 } else {
156 status = Message.STATUS_SEND;
157 }
158 } else {
159 status = Message.STATUS_RECEIVED;
160 }
161 String pgpBody = getPgpBody(packet);
162 Message finishedMessage;
163 if (pgpBody == null) {
164 finishedMessage = new Message(conversation,
165 packet.getBody(), Message.ENCRYPTION_NONE, status);
166 } else {
167 finishedMessage = new Message(conversation, pgpBody,
168 Message.ENCRYPTION_PGP, status);
169 }
170 finishedMessage.setRemoteMsgId(packet.getId());
171 finishedMessage.markable = isMarkable(packet);
172 finishedMessage.setCounterpart(from);
173 if (status == Message.STATUS_RECEIVED) {
174 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
175 .getTrueCounterpart(from.getResourcepart()));
176 }
177 if (packet.hasChild("delay")
178 && conversation.hasDuplicateMessage(finishedMessage)) {
179 return null;
180 }
181 finishedMessage.setTime(getTimestamp(packet));
182 return finishedMessage;
183 }
184
185 private Message parseCarbonMessage(final MessagePacket packet, final Account account) {
186 int status;
187 final Jid fullJid;
188 Element forwarded;
189 if (packet.hasChild("received", "urn:xmpp:carbons:2")) {
190 forwarded = packet.findChild("received", "urn:xmpp:carbons:2")
191 .findChild("forwarded", "urn:xmpp:forward:0");
192 status = Message.STATUS_RECEIVED;
193 } else if (packet.hasChild("sent", "urn:xmpp:carbons:2")) {
194 forwarded = packet.findChild("sent", "urn:xmpp:carbons:2")
195 .findChild("forwarded", "urn:xmpp:forward:0");
196 status = Message.STATUS_SEND;
197 } else {
198 return null;
199 }
200 if (forwarded == null) {
201 return null;
202 }
203 Element message = forwarded.findChild("message");
204 if (message == null) {
205 return null;
206 }
207 if (!message.hasChild("body")) {
208 if (status == Message.STATUS_RECEIVED
209 && message.getAttribute("from") != null) {
210 parseNonMessage(message, account);
211 } else if (status == Message.STATUS_SEND
212 && message.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
213 final Jid to = message.getAttributeAsJid("to");
214 if (to != null) {
215 final Conversation conversation = mXmppConnectionService.find(
216 mXmppConnectionService.getConversations(), account,
217 to.toBareJid());
218 if (conversation != null) {
219 mXmppConnectionService.markRead(conversation, false);
220 }
221 }
222 }
223 return null;
224 }
225 if (status == Message.STATUS_RECEIVED) {
226 fullJid = message.getAttributeAsJid("from");
227 if (fullJid == null) {
228 return null;
229 } else {
230 updateLastseen(message, account, true);
231 }
232 } else {
233 fullJid = message.getAttributeAsJid("to");
234 if (fullJid == null) {
235 return null;
236 }
237 }
238 Conversation conversation = mXmppConnectionService
239 .findOrCreateConversation(account, fullJid.toBareJid(), false);
240 String pgpBody = getPgpBody(message);
241 Message finishedMessage;
242 if (pgpBody != null) {
243 finishedMessage = new Message(conversation, pgpBody,
244 Message.ENCRYPTION_PGP, status);
245 } else {
246 String body = message.findChild("body").getContent();
247 finishedMessage = new Message(conversation, body,
248 Message.ENCRYPTION_NONE, status);
249 }
250 finishedMessage.setTime(getTimestamp(message));
251 finishedMessage.setRemoteMsgId(message.getAttribute("id"));
252 finishedMessage.markable = isMarkable(message);
253 finishedMessage.setCounterpart(fullJid);
254 if (conversation.getMode() == Conversation.MODE_MULTI
255 && !fullJid.isBareJid()) {
256 finishedMessage.setType(Message.TYPE_PRIVATE);
257 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
258 .getTrueCounterpart(fullJid.getResourcepart()));
259 if (conversation.hasDuplicateMessage(finishedMessage)) {
260 return null;
261 }
262 }
263 return finishedMessage;
264 }
265
266 private void parseError(final MessagePacket packet, final Account account) {
267 final Jid from = packet.getFrom();
268 mXmppConnectionService.markMessage(account, from.toBareJid(),
269 packet.getId(), Message.STATUS_SEND_FAILED);
270 }
271
272 private void parseNonMessage(Element packet, Account account) {
273 final Jid from = packet.getAttributeAsJid("from");
274 if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
275 Element event = packet.findChild("event",
276 "http://jabber.org/protocol/pubsub#event");
277 parseEvent(event, from, account);
278 } else if (from != null
279 && packet.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
280 String id = packet
281 .findChild("displayed", "urn:xmpp:chat-markers:0")
282 .getAttribute("id");
283 updateLastseen(packet, account, true);
284 mXmppConnectionService.markMessage(account, from.toBareJid(),
285 id, Message.STATUS_SEND_DISPLAYED);
286 } else if (from != null
287 && packet.hasChild("received", "urn:xmpp:chat-markers:0")) {
288 String id = packet.findChild("received", "urn:xmpp:chat-markers:0")
289 .getAttribute("id");
290 updateLastseen(packet, account, false);
291 mXmppConnectionService.markMessage(account, from.toBareJid(),
292 id, Message.STATUS_SEND_RECEIVED);
293 } else if (from != null
294 && packet.hasChild("received", "urn:xmpp:receipts")) {
295 String id = packet.findChild("received", "urn:xmpp:receipts")
296 .getAttribute("id");
297 updateLastseen(packet, account, false);
298 mXmppConnectionService.markMessage(account, from.toBareJid(),
299 id, Message.STATUS_SEND_RECEIVED);
300 } else if (packet.hasChild("x", "http://jabber.org/protocol/muc#user")) {
301 Element x = packet.findChild("x",
302 "http://jabber.org/protocol/muc#user");
303 if (x.hasChild("invite")) {
304 Conversation conversation = mXmppConnectionService
305 .findOrCreateConversation(account,
306 packet.getAttributeAsJid("from"), true);
307 if (!conversation.getMucOptions().online()) {
308 if (x.hasChild("password")) {
309 Element password = x.findChild("password");
310 conversation.getMucOptions().setPassword(
311 password.getContent());
312 mXmppConnectionService.databaseBackend
313 .updateConversation(conversation);
314 }
315 mXmppConnectionService.joinMuc(conversation);
316 mXmppConnectionService.updateConversationUi();
317 }
318 }
319 } else if (packet.hasChild("x", "jabber:x:conference")) {
320 Element x = packet.findChild("x", "jabber:x:conference");
321 Jid jid;
322 try {
323 jid = Jid.fromString(x.getAttribute("jid"));
324 } catch (InvalidJidException e) {
325 jid = null;
326 }
327 String password = x.getAttribute("password");
328 if (jid != null) {
329 Conversation conversation = mXmppConnectionService
330 .findOrCreateConversation(account, jid, true);
331 if (!conversation.getMucOptions().online()) {
332 if (password != null) {
333 conversation.getMucOptions().setPassword(password);
334 mXmppConnectionService.databaseBackend
335 .updateConversation(conversation);
336 }
337 mXmppConnectionService.joinMuc(conversation);
338 mXmppConnectionService.updateConversationUi();
339 }
340 }
341 }
342 }
343
344 private void parseEvent(final Element event, final Jid from, final Account account) {
345 Element items = event.findChild("items");
346 String node = items.getAttribute("node");
347 if (node != null) {
348 if (node.equals("urn:xmpp:avatar:metadata")) {
349 Avatar avatar = Avatar.parseMetadata(items);
350 if (avatar != null) {
351 avatar.owner = from;
352 if (mXmppConnectionService.getFileBackend().isAvatarCached(
353 avatar)) {
354 if (account.getJid().toBareJid().equals(from)) {
355 if (account.setAvatar(avatar.getFilename())) {
356 mXmppConnectionService.databaseBackend
357 .updateAccount(account);
358 }
359 mXmppConnectionService.getAvatarService().clear(
360 account);
361 mXmppConnectionService.updateConversationUi();
362 mXmppConnectionService.updateAccountUi();
363 } else {
364 Contact contact = account.getRoster().getContact(
365 from);
366 contact.setAvatar(avatar.getFilename());
367 mXmppConnectionService.getAvatarService().clear(
368 contact);
369 mXmppConnectionService.updateConversationUi();
370 mXmppConnectionService.updateRosterUi();
371 }
372 } else {
373 mXmppConnectionService.fetchAvatar(account, avatar);
374 }
375 }
376 } else if (node.equals("http://jabber.org/protocol/nick")) {
377 Element item = items.findChild("item");
378 if (item != null) {
379 Element nick = item.findChild("nick",
380 "http://jabber.org/protocol/nick");
381 if (nick != null) {
382 if (from != null) {
383 Contact contact = account.getRoster().getContact(
384 from);
385 contact.setPresenceName(nick.getContent());
386 mXmppConnectionService.getAvatarService().clear(account);
387 mXmppConnectionService.updateConversationUi();
388 mXmppConnectionService.updateAccountUi();
389 }
390 }
391 }
392 }
393 }
394 }
395
396 private String getPgpBody(Element message) {
397 Element child = message.findChild("x", "jabber:x:encrypted");
398 if (child == null) {
399 return null;
400 } else {
401 return child.getContent();
402 }
403 }
404
405 private boolean isMarkable(Element message) {
406 return message.hasChild("markable", "urn:xmpp:chat-markers:0");
407 }
408
409 @Override
410 public void onMessagePacketReceived(Account account, MessagePacket packet) {
411 Message message = null;
412 this.parseNick(packet, account);
413
414 if ((packet.getType() == MessagePacket.TYPE_CHAT || packet.getType() == MessagePacket.TYPE_NORMAL)) {
415 if ((packet.getBody() != null)
416 && (packet.getBody().startsWith("?OTR"))) {
417 message = this.parseOtrChat(packet, account);
418 if (message != null) {
419 message.markUnread();
420 }
421 } else if (packet.hasChild("body")
422 && !(packet.hasChild("x",
423 "http://jabber.org/protocol/muc#user"))) {
424 message = this.parseChat(packet, account);
425 if (message != null) {
426 message.markUnread();
427 }
428 } else if (packet.hasChild("received", "urn:xmpp:carbons:2")
429 || (packet.hasChild("sent", "urn:xmpp:carbons:2"))) {
430 message = this.parseCarbonMessage(packet, account);
431 if (message != null) {
432 if (message.getStatus() == Message.STATUS_SEND) {
433 account.activateGracePeriod();
434 mXmppConnectionService.markRead(
435 message.getConversation(), false);
436 } else {
437 message.markUnread();
438 }
439 }
440 } else {
441 parseNonMessage(packet, account);
442 }
443 } else if (packet.getType() == MessagePacket.TYPE_GROUPCHAT) {
444 message = this.parseGroupchat(packet, account);
445 if (message != null) {
446 if (message.getStatus() == Message.STATUS_RECEIVED) {
447 message.markUnread();
448 } else {
449 mXmppConnectionService.markRead(message.getConversation(),
450 false);
451 account.activateGracePeriod();
452 }
453 }
454 } else if (packet.getType() == MessagePacket.TYPE_ERROR) {
455 this.parseError(packet, account);
456 return;
457 } else if (packet.getType() == MessagePacket.TYPE_HEADLINE) {
458 this.parseHeadline(packet, account);
459 return;
460 }
461 if ((message == null) || (message.getBody() == null)) {
462 return;
463 }
464 if ((mXmppConnectionService.confirmMessages())
465 && ((packet.getId() != null))) {
466 if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
467 MessagePacket receipt = mXmppConnectionService
468 .getMessageGenerator().received(account, packet,
469 "urn:xmpp:chat-markers:0");
470 mXmppConnectionService.sendMessagePacket(account, receipt);
471 }
472 if (packet.hasChild("request", "urn:xmpp:receipts")) {
473 MessagePacket receipt = mXmppConnectionService
474 .getMessageGenerator().received(account, packet,
475 "urn:xmpp:receipts");
476 mXmppConnectionService.sendMessagePacket(account, receipt);
477 }
478 }
479 Conversation conversation = message.getConversation();
480 conversation.add(message);
481
482 if (message.getStatus() == Message.STATUS_RECEIVED
483 && conversation.getOtrSession() != null
484 && !conversation.getOtrSession().getSessionID().getUserID()
485 .equals(message.getCounterpart().getResourcepart())) {
486 Log.d(Config.LOGTAG, "ending because of reasons");
487 conversation.endOtrIfNeeded();
488 }
489
490 if (packet.getType() != MessagePacket.TYPE_ERROR) {
491 if (message.getEncryption() == Message.ENCRYPTION_NONE
492 || mXmppConnectionService.saveEncryptedMessages()) {
493 mXmppConnectionService.databaseBackend.createMessage(message);
494 }
495 }
496 if (message.trusted() && message.bodyContainsDownloadable()) {
497 this.mXmppConnectionService.getHttpConnectionManager()
498 .createNewConnection(message);
499 } else {
500 mXmppConnectionService.getNotificationService().push(message);
501 }
502 mXmppConnectionService.updateConversationUi();
503 }
504
505 private void parseHeadline(MessagePacket packet, Account account) {
506 if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
507 Element event = packet.findChild("event",
508 "http://jabber.org/protocol/pubsub#event");
509 parseEvent(event, packet.getFrom(), account);
510 }
511 }
512
513 private void parseNick(MessagePacket packet, Account account) {
514 Element nick = packet.findChild("nick",
515 "http://jabber.org/protocol/nick");
516 if (nick != null) {
517 if (packet.getFrom() != null) {
518 Contact contact = account.getRoster().getContact(
519 packet.getFrom());
520 contact.setPresenceName(nick.getContent());
521 }
522 }
523 }
524}