1package eu.siacs.conversations.parser;
2
3import android.os.SystemClock;
4import net.java.otr4j.session.Session;
5import net.java.otr4j.session.SessionStatus;
6import eu.siacs.conversations.Config;
7import eu.siacs.conversations.entities.Account;
8import eu.siacs.conversations.entities.Contact;
9import eu.siacs.conversations.entities.Conversation;
10import eu.siacs.conversations.entities.Message;
11import eu.siacs.conversations.services.XmppConnectionService;
12import eu.siacs.conversations.utils.CryptoHelper;
13import eu.siacs.conversations.xml.Element;
14import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
15import eu.siacs.conversations.xmpp.pep.Avatar;
16import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
17
18public class MessageParser extends AbstractParser implements
19 OnMessagePacketReceived {
20
21 private long lastCarbonMessageReceived = -(Config.CARBON_GRACE_PERIOD * 1000);
22
23 public MessageParser(XmppConnectionService service) {
24 super(service);
25 }
26
27 private Message parseChat(MessagePacket packet, Account account) {
28 String[] fromParts = packet.getFrom().split("/", 2);
29 Conversation conversation = mXmppConnectionService
30 .findOrCreateConversation(account, fromParts[0], false);
31 conversation.setLatestMarkableMessageId(getMarkableMessageId(packet));
32 updateLastseen(packet, account, true);
33 String pgpBody = getPgpBody(packet);
34 Message finishedMessage;
35 if (pgpBody != null) {
36 finishedMessage = new Message(conversation, packet.getFrom(),
37 pgpBody, Message.ENCRYPTION_PGP, Message.STATUS_RECEIVED);
38 } else {
39 finishedMessage = new Message(conversation, packet.getFrom(),
40 packet.getBody(), Message.ENCRYPTION_NONE,
41 Message.STATUS_RECEIVED);
42 }
43 finishedMessage.setRemoteMsgId(packet.getId());
44 if (conversation.getMode() == Conversation.MODE_MULTI
45 && fromParts.length >= 2) {
46 finishedMessage.setType(Message.TYPE_PRIVATE);
47 finishedMessage.setPresence(fromParts[1]);
48 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
49 .getTrueCounterpart(fromParts[1]));
50 if (conversation.hasDuplicateMessage(finishedMessage)) {
51 return null;
52 }
53
54 }
55 finishedMessage.setTime(getTimestamp(packet));
56 return finishedMessage;
57 }
58
59 private Message parseOtrChat(MessagePacket packet, Account account) {
60 boolean properlyAddressed = (packet.getTo().split("/", 2).length == 2)
61 || (account.countPresences() == 1);
62 String[] fromParts = packet.getFrom().split("/", 2);
63 Conversation conversation = mXmppConnectionService
64 .findOrCreateConversation(account, fromParts[0], false);
65 String presence;
66 if (fromParts.length >= 2) {
67 presence = fromParts[1];
68 } else {
69 presence = "";
70 }
71 updateLastseen(packet, account, true);
72 String body = packet.getBody();
73 if (body.matches("^\\?OTRv\\d*\\?")) {
74 conversation.resetOtrSession();
75 }
76 if (!conversation.hasValidOtrSession()) {
77 if (properlyAddressed) {
78 conversation.startOtrSession(mXmppConnectionService, presence,
79 false);
80 } else {
81 return null;
82 }
83 } else {
84 String foreignPresence = conversation.getOtrSession()
85 .getSessionID().getUserID();
86 if (!foreignPresence.equals(presence)) {
87 conversation.endOtrIfNeeded();
88 if (properlyAddressed) {
89 conversation.startOtrSession(mXmppConnectionService,
90 presence, false);
91 } else {
92 return null;
93 }
94 }
95 }
96 try {
97 Session otrSession = conversation.getOtrSession();
98 SessionStatus before = otrSession.getSessionStatus();
99 body = otrSession.transformReceiving(body);
100 SessionStatus after = otrSession.getSessionStatus();
101 if ((before != after) && (after == SessionStatus.ENCRYPTED)) {
102 mXmppConnectionService.onOtrSessionEstablished(conversation);
103 } else if ((before != after) && (after == SessionStatus.FINISHED)) {
104 conversation.resetOtrSession();
105 mXmppConnectionService.updateConversationUi();
106 }
107 if ((body == null) || (body.isEmpty())) {
108 return null;
109 }
110 if (body.startsWith(CryptoHelper.FILETRANSFER)) {
111 String key = body.substring(CryptoHelper.FILETRANSFER.length());
112 conversation.setSymmetricKey(CryptoHelper.hexToBytes(key));
113 return null;
114 }
115 conversation
116 .setLatestMarkableMessageId(getMarkableMessageId(packet));
117 Message finishedMessage = new Message(conversation,
118 packet.getFrom(), body, Message.ENCRYPTION_OTR,
119 Message.STATUS_RECEIVED);
120 finishedMessage.setTime(getTimestamp(packet));
121 finishedMessage.setRemoteMsgId(packet.getId());
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 String[] fromParts = packet.getFrom().split("/", 2);
136 if (mXmppConnectionService.find(account.pendingConferenceLeaves,
137 account, fromParts[0]) != null) {
138 return null;
139 }
140 Conversation conversation = mXmppConnectionService
141 .findOrCreateConversation(account, fromParts[0], true);
142 if (packet.hasChild("subject")) {
143 conversation.getMucOptions().setSubject(
144 packet.findChild("subject").getContent());
145 mXmppConnectionService.updateConversationUi();
146 return null;
147 }
148 if ((fromParts.length == 1)) {
149 return null;
150 }
151 String counterPart = fromParts[1];
152 if (counterPart.equals(conversation.getMucOptions().getActualNick())) {
153 if (mXmppConnectionService.markMessage(conversation,
154 packet.getId(), Message.STATUS_SEND)) {
155 return null;
156 } else {
157 status = Message.STATUS_SEND;
158 }
159 } else {
160 status = Message.STATUS_RECEIVED;
161 }
162 String pgpBody = getPgpBody(packet);
163 conversation.setLatestMarkableMessageId(getMarkableMessageId(packet));
164 Message finishedMessage;
165 if (pgpBody == null) {
166 finishedMessage = new Message(conversation, counterPart,
167 packet.getBody(), Message.ENCRYPTION_NONE, status);
168 } else {
169 finishedMessage = new Message(conversation, counterPart, pgpBody,
170 Message.ENCRYPTION_PGP, status);
171 }
172 finishedMessage.setRemoteMsgId(packet.getId());
173 if (status == Message.STATUS_RECEIVED) {
174 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
175 .getTrueCounterpart(counterPart));
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(MessagePacket packet, Account account) {
186 int status;
187 String 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) || (!message.hasChild("body"))) {
205 if (status == Message.STATUS_RECEIVED
206 && message.getAttribute("from") != null) {
207 parseNonMessage(message, account);
208 }
209 return null;
210 }
211 if (status == Message.STATUS_RECEIVED) {
212 fullJid = message.getAttribute("from");
213 if (fullJid == null) {
214 return null;
215 } else {
216 updateLastseen(message, account, true);
217 }
218 } else {
219 fullJid = message.getAttribute("to");
220 if (fullJid == null) {
221 return null;
222 }
223 }
224 String[] parts = fullJid.split("/", 2);
225 Conversation conversation = mXmppConnectionService
226 .findOrCreateConversation(account, parts[0], false);
227 conversation.setLatestMarkableMessageId(getMarkableMessageId(packet));
228
229 String pgpBody = getPgpBody(message);
230 Message finishedMessage;
231 if (pgpBody != null) {
232 finishedMessage = new Message(conversation, fullJid, pgpBody,
233 Message.ENCRYPTION_PGP, status);
234 } else {
235 String body = message.findChild("body").getContent();
236 finishedMessage = new Message(conversation, fullJid, body,
237 Message.ENCRYPTION_NONE, status);
238 }
239 finishedMessage.setTime(getTimestamp(message));
240 finishedMessage.setRemoteMsgId(message.getAttribute("id"));
241 if (conversation.getMode() == Conversation.MODE_MULTI
242 && parts.length >= 2) {
243 finishedMessage.setType(Message.TYPE_PRIVATE);
244 finishedMessage.setPresence(parts[1]);
245 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
246 .getTrueCounterpart(parts[1]));
247 if (conversation.hasDuplicateMessage(finishedMessage)) {
248 return null;
249 }
250 }
251
252 return finishedMessage;
253 }
254
255 private void parseError(MessagePacket packet, Account account) {
256 String[] fromParts = packet.getFrom().split("/", 2);
257 mXmppConnectionService.markMessage(account, fromParts[0],
258 packet.getId(), Message.STATUS_SEND_FAILED);
259 }
260
261 private void parseNonMessage(Element packet, Account account) {
262 String from = packet.getAttribute("from");
263 if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
264 Element event = packet.findChild("event",
265 "http://jabber.org/protocol/pubsub#event");
266 parseEvent(event, packet.getAttribute("from"), account);
267 } else if (from != null
268 && packet.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
269 String id = packet
270 .findChild("displayed", "urn:xmpp:chat-markers:0")
271 .getAttribute("id");
272 updateLastseen(packet, account, true);
273 mXmppConnectionService.markMessage(account, from.split("/", 2)[0],
274 id, Message.STATUS_SEND_DISPLAYED);
275 } else if (from != null
276 && packet.hasChild("received", "urn:xmpp:chat-markers:0")) {
277 String id = packet.findChild("received", "urn:xmpp:chat-markers:0")
278 .getAttribute("id");
279 updateLastseen(packet, account, false);
280 mXmppConnectionService.markMessage(account, from.split("/", 2)[0],
281 id, Message.STATUS_SEND_RECEIVED);
282 } else if (from != null
283 && packet.hasChild("received", "urn:xmpp:receipts")) {
284 String id = packet.findChild("received", "urn:xmpp:receipts")
285 .getAttribute("id");
286 updateLastseen(packet, account, false);
287 mXmppConnectionService.markMessage(account, from.split("/", 2)[0],
288 id, Message.STATUS_SEND_RECEIVED);
289 } else if (packet.hasChild("x", "http://jabber.org/protocol/muc#user")) {
290 Element x = packet.findChild("x",
291 "http://jabber.org/protocol/muc#user");
292 if (x.hasChild("invite")) {
293 Conversation conversation = mXmppConnectionService
294 .findOrCreateConversation(account,
295 packet.getAttribute("from"), true);
296 if (!conversation.getMucOptions().online()) {
297 if (x.hasChild("password")) {
298 Element password = x.findChild("password");
299 conversation.getMucOptions().setPassword(
300 password.getContent());
301 mXmppConnectionService.databaseBackend.updateConversation(conversation);
302 }
303 mXmppConnectionService.joinMuc(conversation);
304 mXmppConnectionService.updateConversationUi();
305 }
306 }
307 } else if (packet.hasChild("x", "jabber:x:conference")) {
308 Element x = packet.findChild("x", "jabber:x:conference");
309 String jid = x.getAttribute("jid");
310 String password = x.getAttribute("password");
311 if (jid != null) {
312 Conversation conversation = mXmppConnectionService
313 .findOrCreateConversation(account, jid, true);
314 if (!conversation.getMucOptions().online()) {
315 if (password != null) {
316 conversation.getMucOptions().setPassword(password);
317 mXmppConnectionService.databaseBackend.updateConversation(conversation);
318 }
319 mXmppConnectionService.joinMuc(conversation);
320 mXmppConnectionService.updateConversationUi();
321 }
322 }
323 }
324 }
325
326 private void parseEvent(Element event, String from, Account account) {
327 Element items = event.findChild("items");
328 String node = items.getAttribute("node");
329 if (node != null) {
330 if (node.equals("urn:xmpp:avatar:metadata")) {
331 Avatar avatar = Avatar.parseMetadata(items);
332 if (avatar != null) {
333 avatar.owner = from;
334 if (mXmppConnectionService.getFileBackend().isAvatarCached(
335 avatar)) {
336 if (account.getJid().equals(from)) {
337 if (account.setAvatar(avatar.getFilename())) {
338 mXmppConnectionService.databaseBackend
339 .updateAccount(account);
340 }
341 } else {
342 Contact contact = account.getRoster().getContact(
343 from);
344 contact.setAvatar(avatar.getFilename());
345 }
346 } else {
347 mXmppConnectionService.fetchAvatar(account, avatar);
348 }
349 }
350 } else if (node.equals("http://jabber.org/protocol/nick")) {
351 Element item = items.findChild("item");
352 if (item != null) {
353 Element nick = item.findChild("nick",
354 "http://jabber.org/protocol/nick");
355 if (nick != null) {
356 if (from != null) {
357 Contact contact = account.getRoster().getContact(
358 from);
359 contact.setPresenceName(nick.getContent());
360 }
361 }
362 }
363 }
364 }
365 }
366
367 private String getPgpBody(Element message) {
368 Element child = message.findChild("x", "jabber:x:encrypted");
369 if (child == null) {
370 return null;
371 } else {
372 return child.getContent();
373 }
374 }
375
376 private String getMarkableMessageId(Element message) {
377 if (message.hasChild("markable", "urn:xmpp:chat-markers:0")) {
378 return message.getAttribute("id");
379 } else {
380 return null;
381 }
382 }
383
384 @Override
385 public void onMessagePacketReceived(Account account, MessagePacket packet) {
386 Message message = null;
387 boolean notify = true;
388 if (mXmppConnectionService.getPreferences().getBoolean(
389 "notification_grace_period_after_carbon_received", true)) {
390 notify = (SystemClock.elapsedRealtime() - lastCarbonMessageReceived) > (Config.CARBON_GRACE_PERIOD * 1000);
391 }
392
393 this.parseNick(packet, account);
394
395 if ((packet.getType() == MessagePacket.TYPE_CHAT || packet.getType() == MessagePacket.TYPE_NORMAL)) {
396 if ((packet.getBody() != null)
397 && (packet.getBody().startsWith("?OTR"))) {
398 message = this.parseOtrChat(packet, account);
399 if (message != null) {
400 message.markUnread();
401 }
402 } else if (packet.hasChild("body")
403 && !(packet.hasChild("x",
404 "http://jabber.org/protocol/muc#user"))) {
405 message = this.parseChat(packet, account);
406 if (message != null) {
407 message.markUnread();
408 }
409 } else if (packet.hasChild("received", "urn:xmpp:carbons:2")
410 || (packet.hasChild("sent", "urn:xmpp:carbons:2"))) {
411 message = this.parseCarbonMessage(packet, account);
412 if (message != null) {
413 if (message.getStatus() == Message.STATUS_SEND) {
414 lastCarbonMessageReceived = SystemClock
415 .elapsedRealtime();
416 notify = false;
417 message.getConversation().markRead();
418 } else {
419 message.markUnread();
420 }
421 }
422 } else {
423 parseNonMessage(packet, account);
424 }
425 } else if (packet.getType() == MessagePacket.TYPE_GROUPCHAT) {
426 message = this.parseGroupchat(packet, account);
427 if (message != null) {
428 if (message.getStatus() == Message.STATUS_RECEIVED) {
429 message.markUnread();
430 } else {
431 message.getConversation().markRead();
432 lastCarbonMessageReceived = SystemClock.elapsedRealtime();
433 notify = false;
434 }
435 }
436 } else if (packet.getType() == MessagePacket.TYPE_ERROR) {
437 this.parseError(packet, account);
438 return;
439 } else if (packet.getType() == MessagePacket.TYPE_HEADLINE) {
440 this.parseHeadline(packet, account);
441 return;
442 }
443 if ((message == null) || (message.getBody() == null)) {
444 return;
445 }
446 if ((mXmppConnectionService.confirmMessages())
447 && ((packet.getId() != null))) {
448 if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
449 MessagePacket receipt = mXmppConnectionService
450 .getMessageGenerator().received(account, packet,
451 "urn:xmpp:chat-markers:0");
452 mXmppConnectionService.sendMessagePacket(account, receipt);
453 }
454 if (packet.hasChild("request", "urn:xmpp:receipts")) {
455 MessagePacket receipt = mXmppConnectionService
456 .getMessageGenerator().received(account, packet,
457 "urn:xmpp:receipts");
458 mXmppConnectionService.sendMessagePacket(account, receipt);
459 }
460 }
461 Conversation conversation = message.getConversation();
462 conversation.getMessages().add(message);
463 if (packet.getType() != MessagePacket.TYPE_ERROR) {
464 if (message.getEncryption() == Message.ENCRYPTION_NONE
465 || mXmppConnectionService.saveEncryptedMessages()) {
466 mXmppConnectionService.databaseBackend.createMessage(message);
467 }
468 }
469 notify = notify && !conversation.isMuted();
470 mXmppConnectionService.notifyUi(conversation, notify);
471 }
472
473 private void parseHeadline(MessagePacket packet, Account account) {
474 if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
475 Element event = packet.findChild("event",
476 "http://jabber.org/protocol/pubsub#event");
477 parseEvent(event, packet.getFrom(), account);
478 }
479 }
480
481 private void parseNick(MessagePacket packet, Account account) {
482 Element nick = packet.findChild("nick",
483 "http://jabber.org/protocol/nick");
484 if (nick != null) {
485 if (packet.getFrom() != null) {
486 Contact contact = account.getRoster().getContact(
487 packet.getFrom());
488 contact.setPresenceName(nick.getContent());
489 }
490 }
491 }
492}