1package eu.siacs.conversations.parser;
2
3import net.java.otr4j.session.Session;
4import net.java.otr4j.session.SessionStatus;
5import eu.siacs.conversations.entities.Account;
6import eu.siacs.conversations.entities.Contact;
7import eu.siacs.conversations.entities.Conversation;
8import eu.siacs.conversations.entities.Message;
9import eu.siacs.conversations.services.NotificationService;
10import eu.siacs.conversations.services.XmppConnectionService;
11import eu.siacs.conversations.utils.CryptoHelper;
12import eu.siacs.conversations.xml.Element;
13import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
14import eu.siacs.conversations.xmpp.pep.Avatar;
15import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
16
17public class MessageParser extends AbstractParser implements
18 OnMessagePacketReceived {
19 public MessageParser(XmppConnectionService service) {
20 super(service);
21 }
22
23 private Message parseChat(MessagePacket packet, Account account) {
24 String[] fromParts = packet.getFrom().split("/", 2);
25 Conversation conversation = mXmppConnectionService
26 .findOrCreateConversation(account, fromParts[0], false);
27 updateLastseen(packet, account, true);
28 String pgpBody = getPgpBody(packet);
29 Message finishedMessage;
30 if (pgpBody != null) {
31 finishedMessage = new Message(conversation, packet.getFrom(),
32 pgpBody, Message.ENCRYPTION_PGP, Message.STATUS_RECEIVED);
33 } else {
34 finishedMessage = new Message(conversation, packet.getFrom(),
35 packet.getBody(), Message.ENCRYPTION_NONE,
36 Message.STATUS_RECEIVED);
37 }
38 finishedMessage.setRemoteMsgId(packet.getId());
39 finishedMessage.markable = isMarkable(packet);
40 if (conversation.getMode() == Conversation.MODE_MULTI
41 && fromParts.length >= 2) {
42 finishedMessage.setType(Message.TYPE_PRIVATE);
43 finishedMessage.setPresence(fromParts[1]);
44 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
45 .getTrueCounterpart(fromParts[1]));
46 if (conversation.hasDuplicateMessage(finishedMessage)) {
47 return null;
48 }
49
50 }
51 finishedMessage.setTime(getTimestamp(packet));
52 return finishedMessage;
53 }
54
55 private Message parseOtrChat(MessagePacket packet, Account account) {
56 boolean properlyAddressed = (packet.getTo().split("/", 2).length == 2)
57 || (account.countPresences() == 1);
58 String[] fromParts = packet.getFrom().split("/", 2);
59 Conversation conversation = mXmppConnectionService
60 .findOrCreateConversation(account, fromParts[0], false);
61 String presence;
62 if (fromParts.length >= 2) {
63 presence = fromParts[1];
64 } else {
65 presence = "";
66 }
67 updateLastseen(packet, account, true);
68 String body = packet.getBody();
69 if (body.matches("^\\?OTRv\\d*\\?")) {
70 conversation.endOtrIfNeeded();
71 }
72 if (!conversation.hasValidOtrSession()) {
73 if (properlyAddressed) {
74 conversation.startOtrSession(mXmppConnectionService, presence,
75 false);
76 } else {
77 return null;
78 }
79 } else {
80 String foreignPresence = conversation.getOtrSession()
81 .getSessionID().getUserID();
82 if (!foreignPresence.equals(presence)) {
83 conversation.endOtrIfNeeded();
84 if (properlyAddressed) {
85 conversation.startOtrSession(mXmppConnectionService,
86 presence, false);
87 } else {
88 return null;
89 }
90 }
91 }
92 try {
93 Session otrSession = conversation.getOtrSession();
94 SessionStatus before = otrSession.getSessionStatus();
95 body = otrSession.transformReceiving(body);
96 SessionStatus after = otrSession.getSessionStatus();
97 if ((before != after) && (after == SessionStatus.ENCRYPTED)) {
98 mXmppConnectionService.onOtrSessionEstablished(conversation);
99 } else if ((before != after) && (after == SessionStatus.FINISHED)) {
100 conversation.resetOtrSession();
101 mXmppConnectionService.updateConversationUi();
102 }
103 if ((body == null) || (body.isEmpty())) {
104 return null;
105 }
106 if (body.startsWith(CryptoHelper.FILETRANSFER)) {
107 String key = body.substring(CryptoHelper.FILETRANSFER.length());
108 conversation.setSymmetricKey(CryptoHelper.hexToBytes(key));
109 return null;
110 }
111 Message finishedMessage = new Message(conversation,
112 packet.getFrom(), body, Message.ENCRYPTION_OTR,
113 Message.STATUS_RECEIVED);
114 finishedMessage.setTime(getTimestamp(packet));
115 finishedMessage.setRemoteMsgId(packet.getId());
116 finishedMessage.markable = isMarkable(packet);
117 return finishedMessage;
118 } catch (Exception e) {
119 String receivedId = packet.getId();
120 if (receivedId != null) {
121 mXmppConnectionService.replyWithNotAcceptable(account, packet);
122 }
123 conversation.resetOtrSession();
124 return null;
125 }
126 }
127
128 private Message parseGroupchat(MessagePacket packet, Account account) {
129 int status;
130 String[] fromParts = packet.getFrom().split("/", 2);
131 if (mXmppConnectionService.find(account.pendingConferenceLeaves,
132 account, fromParts[0]) != null) {
133 return null;
134 }
135 Conversation conversation = mXmppConnectionService
136 .findOrCreateConversation(account, fromParts[0], true);
137 if (packet.hasChild("subject")) {
138 conversation.getMucOptions().setSubject(
139 packet.findChild("subject").getContent());
140 mXmppConnectionService.updateConversationUi();
141 return null;
142 }
143 if ((fromParts.length == 1)) {
144 return null;
145 }
146 String counterPart = fromParts[1];
147 if (counterPart.equals(conversation.getMucOptions().getActualNick())) {
148 if (mXmppConnectionService.markMessage(conversation,
149 packet.getId(), Message.STATUS_SEND)) {
150 return null;
151 } else {
152 status = Message.STATUS_SEND;
153 }
154 } else {
155 status = Message.STATUS_RECEIVED;
156 }
157 String pgpBody = getPgpBody(packet);
158 Message finishedMessage;
159 if (pgpBody == null) {
160 finishedMessage = new Message(conversation, counterPart,
161 packet.getBody(), Message.ENCRYPTION_NONE, status);
162 } else {
163 finishedMessage = new Message(conversation, counterPart, pgpBody,
164 Message.ENCRYPTION_PGP, status);
165 }
166 finishedMessage.setRemoteMsgId(packet.getId());
167 finishedMessage.markable = isMarkable(packet);
168 if (status == Message.STATUS_RECEIVED) {
169 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
170 .getTrueCounterpart(counterPart));
171 }
172 if (packet.hasChild("delay")
173 && conversation.hasDuplicateMessage(finishedMessage)) {
174 return null;
175 }
176 finishedMessage.setTime(getTimestamp(packet));
177 return finishedMessage;
178 }
179
180 private Message parseCarbonMessage(MessagePacket packet, Account account) {
181 int status;
182 String fullJid;
183 Element forwarded;
184 if (packet.hasChild("received", "urn:xmpp:carbons:2")) {
185 forwarded = packet.findChild("received", "urn:xmpp:carbons:2")
186 .findChild("forwarded", "urn:xmpp:forward:0");
187 status = Message.STATUS_RECEIVED;
188 } else if (packet.hasChild("sent", "urn:xmpp:carbons:2")) {
189 forwarded = packet.findChild("sent", "urn:xmpp:carbons:2")
190 .findChild("forwarded", "urn:xmpp:forward:0");
191 status = Message.STATUS_SEND;
192 } else {
193 return null;
194 }
195 if (forwarded == null) {
196 return null;
197 }
198 Element message = forwarded.findChild("message");
199 if (message == null) {
200 return null;
201 }
202 if (!message.hasChild("body")) {
203 if (status == Message.STATUS_RECEIVED
204 && message.getAttribute("from") != null) {
205 parseNonMessage(message, account);
206 } else if (status == Message.STATUS_SEND
207 && message.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
208 String to = message.getAttribute("to");
209 if (to != null) {
210 Conversation conversation = mXmppConnectionService.find(
211 mXmppConnectionService.getConversations(), account,
212 to.split("/")[0]);
213 if (conversation != null) {
214 mXmppConnectionService.markRead(conversation, false);
215 }
216 }
217 }
218 return null;
219 }
220 if (status == Message.STATUS_RECEIVED) {
221 fullJid = message.getAttribute("from");
222 if (fullJid == null) {
223 return null;
224 } else {
225 updateLastseen(message, account, true);
226 }
227 } else {
228 fullJid = message.getAttribute("to");
229 if (fullJid == null) {
230 return null;
231 }
232 }
233 String[] parts = fullJid.split("/", 2);
234 Conversation conversation = mXmppConnectionService
235 .findOrCreateConversation(account, parts[0], false);
236 String pgpBody = getPgpBody(message);
237 Message finishedMessage;
238 if (pgpBody != null) {
239 finishedMessage = new Message(conversation, fullJid, pgpBody,
240 Message.ENCRYPTION_PGP, status);
241 } else {
242 String body = message.findChild("body").getContent();
243 finishedMessage = new Message(conversation, fullJid, body,
244 Message.ENCRYPTION_NONE, status);
245 }
246 finishedMessage.setTime(getTimestamp(message));
247 finishedMessage.setRemoteMsgId(message.getAttribute("id"));
248 finishedMessage.markable = isMarkable(message);
249 if (conversation.getMode() == Conversation.MODE_MULTI
250 && parts.length >= 2) {
251 finishedMessage.setType(Message.TYPE_PRIVATE);
252 finishedMessage.setPresence(parts[1]);
253 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
254 .getTrueCounterpart(parts[1]));
255 if (conversation.hasDuplicateMessage(finishedMessage)) {
256 return null;
257 }
258 }
259
260 return finishedMessage;
261 }
262
263 private void parseError(MessagePacket packet, Account account) {
264 String[] fromParts = packet.getFrom().split("/", 2);
265 mXmppConnectionService.markMessage(account, fromParts[0],
266 packet.getId(), Message.STATUS_SEND_FAILED);
267 }
268
269 private void parseNonMessage(Element packet, Account account) {
270 String from = packet.getAttribute("from");
271 if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
272 Element event = packet.findChild("event",
273 "http://jabber.org/protocol/pubsub#event");
274 parseEvent(event, packet.getAttribute("from"), account);
275 } else if (from != null
276 && packet.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
277 String id = packet
278 .findChild("displayed", "urn:xmpp:chat-markers:0")
279 .getAttribute("id");
280 updateLastseen(packet, account, true);
281 mXmppConnectionService.markMessage(account, from.split("/", 2)[0],
282 id, Message.STATUS_SEND_DISPLAYED);
283 } else if (from != null
284 && packet.hasChild("received", "urn:xmpp:chat-markers:0")) {
285 String id = packet.findChild("received", "urn:xmpp:chat-markers:0")
286 .getAttribute("id");
287 updateLastseen(packet, account, false);
288 mXmppConnectionService.markMessage(account, from.split("/", 2)[0],
289 id, Message.STATUS_SEND_RECEIVED);
290 } else if (from != null
291 && packet.hasChild("received", "urn:xmpp:receipts")) {
292 String id = packet.findChild("received", "urn:xmpp:receipts")
293 .getAttribute("id");
294 updateLastseen(packet, account, false);
295 mXmppConnectionService.markMessage(account, from.split("/", 2)[0],
296 id, Message.STATUS_SEND_RECEIVED);
297 } else if (packet.hasChild("x", "http://jabber.org/protocol/muc#user")) {
298 Element x = packet.findChild("x",
299 "http://jabber.org/protocol/muc#user");
300 if (x.hasChild("invite")) {
301 Conversation conversation = mXmppConnectionService
302 .findOrCreateConversation(account,
303 packet.getAttribute("from"), true);
304 if (!conversation.getMucOptions().online()) {
305 if (x.hasChild("password")) {
306 Element password = x.findChild("password");
307 conversation.getMucOptions().setPassword(
308 password.getContent());
309 mXmppConnectionService.databaseBackend
310 .updateConversation(conversation);
311 }
312 mXmppConnectionService.joinMuc(conversation);
313 mXmppConnectionService.updateConversationUi();
314 }
315 }
316 } else if (packet.hasChild("x", "jabber:x:conference")) {
317 Element x = packet.findChild("x", "jabber:x:conference");
318 String jid = x.getAttribute("jid");
319 String password = x.getAttribute("password");
320 if (jid != null) {
321 Conversation conversation = mXmppConnectionService
322 .findOrCreateConversation(account, jid, true);
323 if (!conversation.getMucOptions().online()) {
324 if (password != null) {
325 conversation.getMucOptions().setPassword(password);
326 mXmppConnectionService.databaseBackend
327 .updateConversation(conversation);
328 }
329 mXmppConnectionService.joinMuc(conversation);
330 mXmppConnectionService.updateConversationUi();
331 }
332 }
333 }
334 }
335
336 private void parseEvent(Element event, String from, Account account) {
337 Element items = event.findChild("items");
338 String node = items.getAttribute("node");
339 if (node != null) {
340 if (node.equals("urn:xmpp:avatar:metadata")) {
341 Avatar avatar = Avatar.parseMetadata(items);
342 if (avatar != null) {
343 avatar.owner = from;
344 if (mXmppConnectionService.getFileBackend().isAvatarCached(
345 avatar)) {
346 if (account.getJid().equals(from)) {
347 if (account.setAvatar(avatar.getFilename())) {
348 mXmppConnectionService.databaseBackend
349 .updateAccount(account);
350 }
351 mXmppConnectionService.getAvatarService().clear(
352 account);
353 } else {
354 Contact contact = account.getRoster().getContact(
355 from);
356 contact.setAvatar(avatar.getFilename());
357 mXmppConnectionService.getAvatarService().clear(
358 contact);
359 }
360 } else {
361 mXmppConnectionService.fetchAvatar(account, avatar);
362 }
363 }
364 } else if (node.equals("http://jabber.org/protocol/nick")) {
365 Element item = items.findChild("item");
366 if (item != null) {
367 Element nick = item.findChild("nick",
368 "http://jabber.org/protocol/nick");
369 if (nick != null) {
370 if (from != null) {
371 Contact contact = account.getRoster().getContact(
372 from);
373 contact.setPresenceName(nick.getContent());
374 }
375 }
376 }
377 }
378 }
379 }
380
381 private String getPgpBody(Element message) {
382 Element child = message.findChild("x", "jabber:x:encrypted");
383 if (child == null) {
384 return null;
385 } else {
386 return child.getContent();
387 }
388 }
389
390 private boolean isMarkable(Element message) {
391 return message.hasChild("markable", "urn:xmpp:chat-markers:0");
392 }
393
394 @Override
395 public void onMessagePacketReceived(Account account, MessagePacket packet) {
396 Message message = null;
397 boolean notify = mXmppConnectionService.getPreferences().getBoolean(
398 "show_notification", true);
399 boolean alwaysNotifyInConference = notify
400 && mXmppConnectionService.getPreferences().getBoolean(
401 "always_notify_in_conference", false);
402
403 this.parseNick(packet, account);
404
405 if ((packet.getType() == MessagePacket.TYPE_CHAT || packet.getType() == MessagePacket.TYPE_NORMAL)) {
406 if ((packet.getBody() != null)
407 && (packet.getBody().startsWith("?OTR"))) {
408 message = this.parseOtrChat(packet, account);
409 if (message != null) {
410 message.markUnread();
411 }
412 } else if (packet.hasChild("body")
413 && !(packet.hasChild("x",
414 "http://jabber.org/protocol/muc#user"))) {
415 message = this.parseChat(packet, account);
416 if (message != null) {
417 message.markUnread();
418 }
419 } else if (packet.hasChild("received", "urn:xmpp:carbons:2")
420 || (packet.hasChild("sent", "urn:xmpp:carbons:2"))) {
421 message = this.parseCarbonMessage(packet, account);
422 if (message != null) {
423 if (message.getStatus() == Message.STATUS_SEND) {
424 account.activateGracePeriod();
425 notify = false;
426 mXmppConnectionService.markRead(
427 message.getConversation(), false);
428 } else {
429 message.markUnread();
430 }
431 }
432 } else {
433 parseNonMessage(packet, account);
434 }
435 } else if (packet.getType() == MessagePacket.TYPE_GROUPCHAT) {
436 message = this.parseGroupchat(packet, account);
437 if (message != null) {
438 if (message.getStatus() == Message.STATUS_RECEIVED) {
439 message.markUnread();
440 notify = alwaysNotifyInConference
441 || NotificationService
442 .wasHighlightedOrPrivate(message);
443 } else {
444 mXmppConnectionService.markRead(message.getConversation(),
445 false);
446 account.activateGracePeriod();
447 notify = false;
448 }
449 }
450 } else if (packet.getType() == MessagePacket.TYPE_ERROR) {
451 this.parseError(packet, account);
452 return;
453 } else if (packet.getType() == MessagePacket.TYPE_HEADLINE) {
454 this.parseHeadline(packet, account);
455 return;
456 }
457 if ((message == null) || (message.getBody() == null)) {
458 return;
459 }
460 if ((mXmppConnectionService.confirmMessages())
461 && ((packet.getId() != null))) {
462 if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
463 MessagePacket receipt = mXmppConnectionService
464 .getMessageGenerator().received(account, packet,
465 "urn:xmpp:chat-markers:0");
466 mXmppConnectionService.sendMessagePacket(account, receipt);
467 }
468 if (packet.hasChild("request", "urn:xmpp:receipts")) {
469 MessagePacket receipt = mXmppConnectionService
470 .getMessageGenerator().received(account, packet,
471 "urn:xmpp:receipts");
472 mXmppConnectionService.sendMessagePacket(account, receipt);
473 }
474 }
475 Conversation conversation = message.getConversation();
476 conversation.add(message);
477 if (packet.getType() != MessagePacket.TYPE_ERROR) {
478 if (message.getEncryption() == Message.ENCRYPTION_NONE
479 || mXmppConnectionService.saveEncryptedMessages()) {
480 mXmppConnectionService.databaseBackend.createMessage(message);
481 }
482 }
483 if (message.bodyContainsDownloadable()) {
484 this.mXmppConnectionService.getHttpConnectionManager()
485 .createNewConnection(message);
486 }
487 notify = notify && !conversation.isMuted();
488 if (notify) {
489 mXmppConnectionService.getNotificationService().push(message);
490 }
491 mXmppConnectionService.updateConversationUi();
492 }
493
494 private void parseHeadline(MessagePacket packet, Account account) {
495 if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
496 Element event = packet.findChild("event",
497 "http://jabber.org/protocol/pubsub#event");
498 parseEvent(event, packet.getFrom(), account);
499 }
500 }
501
502 private void parseNick(MessagePacket packet, Account account) {
503 Element nick = packet.findChild("nick",
504 "http://jabber.org/protocol/nick");
505 if (nick != null) {
506 if (packet.getFrom() != null) {
507 Contact contact = account.getRoster().getContact(
508 packet.getFrom());
509 contact.setPresenceName(nick.getContent());
510 }
511 }
512 }
513}