1package eu.siacs.conversations.parser;
2
3import android.os.SystemClock;
4import android.util.Log;
5import net.java.otr4j.session.Session;
6import net.java.otr4j.session.SessionStatus;
7import eu.siacs.conversations.Config;
8import eu.siacs.conversations.entities.Account;
9import eu.siacs.conversations.entities.Contact;
10import eu.siacs.conversations.entities.Conversation;
11import eu.siacs.conversations.entities.Message;
12import eu.siacs.conversations.services.XmppConnectionService;
13import eu.siacs.conversations.utils.CryptoHelper;
14import eu.siacs.conversations.xml.Element;
15import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
16import eu.siacs.conversations.xmpp.pep.Avatar;
17import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
18
19public class MessageParser extends AbstractParser implements
20 OnMessagePacketReceived {
21
22 private long lastCarbonMessageReceived = -(Config.CARBON_GRACE_PERIOD * 1000);
23
24 public MessageParser(XmppConnectionService service) {
25 super(service);
26 }
27
28 private Message parseChat(MessagePacket packet, Account account) {
29 String[] fromParts = packet.getFrom().split("/");
30 Conversation conversation = mXmppConnectionService
31 .findOrCreateConversation(account, fromParts[0], false);
32 conversation.setLatestMarkableMessageId(getMarkableMessageId(packet));
33 updateLastseen(packet, account, true);
34 String pgpBody = getPgpBody(packet);
35 Message finishedMessage;
36 if (pgpBody != null) {
37 finishedMessage = new Message(conversation, packet.getFrom(),
38 pgpBody, Message.ENCRYPTION_PGP, Message.STATUS_RECEIVED);
39 } else {
40 finishedMessage = new Message(conversation, packet.getFrom(),
41 packet.getBody(), Message.ENCRYPTION_NONE,
42 Message.STATUS_RECEIVED);
43 }
44 finishedMessage.setRemoteMsgId(packet.getId());
45 if (conversation.getMode() == Conversation.MODE_MULTI
46 && fromParts.length >= 2) {
47 finishedMessage.setType(Message.TYPE_PRIVATE);
48 finishedMessage.setPresence(fromParts[1]);
49 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
50 .getTrueCounterpart(fromParts[1]));
51 if (conversation.hasDuplicateMessage(finishedMessage)) {
52 return null;
53 }
54
55 }
56 finishedMessage.setTime(getTimestamp(packet));
57 return finishedMessage;
58 }
59
60 private Message parseOtrChat(MessagePacket packet, Account account) {
61 boolean properlyAddressed = (packet.getTo().split("/").length == 2)
62 || (account.countPresences() == 1);
63 String[] fromParts = packet.getFrom().split("/");
64 Conversation conversation = mXmppConnectionService
65 .findOrCreateConversation(account, fromParts[0], false);
66 String presence;
67 if (fromParts.length >= 2) {
68 presence = fromParts[1];
69 } else {
70 presence = "";
71 }
72 updateLastseen(packet, account, true);
73 String body = packet.getBody();
74 if (!conversation.hasValidOtrSession()) {
75 if (properlyAddressed) {
76 conversation.startOtrSession(
77 mXmppConnectionService.getApplicationContext(),
78 presence, false);
79 } else {
80 return null;
81 }
82 } else {
83 String foreignPresence = conversation.getOtrSession()
84 .getSessionID().getUserID();
85 if (!foreignPresence.equals(presence)) {
86 conversation.endOtrIfNeeded();
87 if (properlyAddressed) {
88 conversation.startOtrSession(
89 mXmppConnectionService.getApplicationContext(),
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.endOtrIfNeeded();
129 return null;
130 }
131 }
132
133 private Message parseGroupchat(MessagePacket packet, Account account) {
134 int status;
135 String[] fromParts = packet.getFrom().split("/");
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")) {
190 forwarded = packet.findChild("received").findChild("forwarded");
191 status = Message.STATUS_RECEIVED;
192 } else if (packet.hasChild("sent")) {
193 forwarded = packet.findChild("sent").findChild("forwarded");
194 status = Message.STATUS_SEND;
195 } else {
196 return null;
197 }
198 if (forwarded == null) {
199 return null;
200 }
201 Element message = forwarded.findChild("message");
202 if ((message == null) || (!message.hasChild("body"))) {
203 if (status == Message.STATUS_RECEIVED
204 && message.getAttribute("from") != null) {
205 parseNormal(message, account);
206 }
207 return null;
208 }
209 if (status == Message.STATUS_RECEIVED) {
210 fullJid = message.getAttribute("from");
211 if (fullJid == null) {
212 return null;
213 } else {
214 updateLastseen(message, account, true);
215 }
216 } else {
217 fullJid = message.getAttribute("to");
218 if (fullJid == null) {
219 return null;
220 }
221 }
222 String[] parts = fullJid.split("/");
223 Conversation conversation = mXmppConnectionService
224 .findOrCreateConversation(account, parts[0], false);
225 conversation.setLatestMarkableMessageId(getMarkableMessageId(packet));
226
227 String pgpBody = getPgpBody(message);
228 Message finishedMessage;
229 if (pgpBody != null) {
230 finishedMessage = new Message(conversation, fullJid, pgpBody,
231 Message.ENCRYPTION_PGP, status);
232 } else {
233 String body = message.findChild("body").getContent();
234 finishedMessage = new Message(conversation, fullJid, body,
235 Message.ENCRYPTION_NONE, status);
236 }
237 finishedMessage.setTime(getTimestamp(message));
238 finishedMessage.setRemoteMsgId(message.getAttribute("id"));
239 if (conversation.getMode() == Conversation.MODE_MULTI
240 && parts.length >= 2) {
241 finishedMessage.setType(Message.TYPE_PRIVATE);
242 finishedMessage.setPresence(parts[1]);
243 finishedMessage.setTrueCounterpart(conversation.getMucOptions()
244 .getTrueCounterpart(parts[1]));
245 if (conversation.hasDuplicateMessage(finishedMessage)) {
246 return null;
247 }
248 }
249
250 return finishedMessage;
251 }
252
253 private void parseError(MessagePacket packet, Account account) {
254 String[] fromParts = packet.getFrom().split("/");
255 mXmppConnectionService.markMessage(account, fromParts[0],
256 packet.getId(), Message.STATUS_SEND_FAILED);
257 }
258
259 private void parseNormal(Element packet, Account account) {
260 if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
261 Element event = packet.findChild("event",
262 "http://jabber.org/protocol/pubsub#event");
263 parseEvent(event, packet.getAttribute("from"), account);
264 }
265 if (packet.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
266 String id = packet
267 .findChild("displayed", "urn:xmpp:chat-markers:0")
268 .getAttribute("id");
269 String[] fromParts = packet.getAttribute("from").split("/");
270 updateLastseen(packet, account, true);
271 mXmppConnectionService.markMessage(account, fromParts[0], id,
272 Message.STATUS_SEND_DISPLAYED);
273 } else if (packet.hasChild("received", "urn:xmpp:chat-markers:0")) {
274 String id = packet.findChild("received", "urn:xmpp:chat-markers:0")
275 .getAttribute("id");
276 String[] fromParts = packet.getAttribute("from").split("/");
277 updateLastseen(packet, account, false);
278 mXmppConnectionService.markMessage(account, fromParts[0], id,
279 Message.STATUS_SEND_RECEIVED);
280 } else if (packet.hasChild("x", "http://jabber.org/protocol/muc#user")) {
281 Element x = packet.findChild("x",
282 "http://jabber.org/protocol/muc#user");
283 if (x.hasChild("invite")) {
284 Conversation conversation = mXmppConnectionService
285 .findOrCreateConversation(account,
286 packet.getAttribute("from"), true);
287 if (!conversation.getMucOptions().online()) {
288 mXmppConnectionService.joinMuc(conversation);
289 mXmppConnectionService.updateConversationUi();
290 }
291 }
292
293 } else if (packet.hasChild("x", "jabber:x:conference")) {
294 Element x = packet.findChild("x", "jabber:x:conference");
295 String jid = x.getAttribute("jid");
296 if (jid != null) {
297 Conversation conversation = mXmppConnectionService
298 .findOrCreateConversation(account, jid, true);
299 if (!conversation.getMucOptions().online()) {
300 mXmppConnectionService.joinMuc(conversation);
301 mXmppConnectionService.updateConversationUi();
302 }
303 }
304 }
305 }
306
307 private void parseEvent(Element event, String from, Account account) {
308 Element items = event.findChild("items");
309 String node = items.getAttribute("node");
310 if (node != null) {
311 if (node.equals("urn:xmpp:avatar:metadata")) {
312 Avatar avatar = Avatar.parseMetadata(items);
313 if (avatar != null) {
314 avatar.owner = from;
315 if (mXmppConnectionService.getFileBackend().isAvatarCached(
316 avatar)) {
317 if (account.getJid().equals(from)) {
318 if (account.setAvatar(avatar.getFilename())) {
319 mXmppConnectionService.databaseBackend
320 .updateAccount(account);
321 }
322 } else {
323 Contact contact = account.getRoster().getContact(
324 from);
325 contact.setAvatar(avatar.getFilename());
326 }
327 } else {
328 mXmppConnectionService.fetchAvatar(account, avatar);
329 }
330 }
331 } else if (node.equals("http://jabber.org/protocol/nick")) {
332 Element item = items.findChild("item");
333 if (item != null) {
334 Element nick = item.findChild("nick",
335 "http://jabber.org/protocol/nick");
336 if (nick != null) {
337 if (from != null) {
338 Contact contact = account.getRoster().getContact(
339 from);
340 contact.setPresenceName(nick.getContent());
341 }
342 }
343 }
344 }
345 }
346 }
347
348 private String getPgpBody(Element message) {
349 Element child = message.findChild("x", "jabber:x:encrypted");
350 if (child == null) {
351 return null;
352 } else {
353 return child.getContent();
354 }
355 }
356
357 private String getMarkableMessageId(Element message) {
358 if (message.hasChild("markable", "urn:xmpp:chat-markers:0")) {
359 return message.getAttribute("id");
360 } else {
361 return null;
362 }
363 }
364
365 @Override
366 public void onMessagePacketReceived(Account account, MessagePacket packet) {
367 Message message = null;
368 boolean notify = true;
369 if (mXmppConnectionService.getPreferences().getBoolean(
370 "notification_grace_period_after_carbon_received", true)) {
371 notify = (SystemClock.elapsedRealtime() - lastCarbonMessageReceived) > (Config.CARBON_GRACE_PERIOD * 1000);
372 }
373
374 this.parseNick(packet, account);
375
376 if ((packet.getType() == MessagePacket.TYPE_CHAT)) {
377 if ((packet.getBody() != null)
378 && (packet.getBody().startsWith("?OTR"))) {
379 message = this.parseOtrChat(packet, account);
380 if (message != null) {
381 message.markUnread();
382 }
383 } else if (packet.hasChild("body")) {
384 message = this.parseChat(packet, account);
385 if (message != null) {
386 message.markUnread();
387 }
388 } else if (packet.hasChild("received") || (packet.hasChild("sent"))) {
389 message = this.parseCarbonMessage(packet, account);
390 if (message != null) {
391 if (message.getStatus() == Message.STATUS_SEND) {
392 lastCarbonMessageReceived = SystemClock
393 .elapsedRealtime();
394 notify = false;
395 message.getConversation().markRead();
396 } else {
397 message.markUnread();
398 }
399 }
400 } else {
401 parseNormal(packet, account);
402 }
403
404 } else if (packet.getType() == MessagePacket.TYPE_GROUPCHAT) {
405 message = this.parseGroupchat(packet, account);
406 if (message != null) {
407 if (message.getStatus() == Message.STATUS_RECEIVED) {
408 message.markUnread();
409 } else {
410 message.getConversation().markRead();
411 lastCarbonMessageReceived = SystemClock.elapsedRealtime();
412 notify = false;
413 }
414 }
415 } else if (packet.getType() == MessagePacket.TYPE_ERROR) {
416 this.parseError(packet, account);
417 return;
418 } else if (packet.getType() == MessagePacket.TYPE_NORMAL) {
419 this.parseNormal(packet, account);
420 return;
421 } else if (packet.getType() == MessagePacket.TYPE_HEADLINE) {
422 this.parseHeadline(packet, account);
423 return;
424 }
425 if ((message == null) || (message.getBody() == null)) {
426 return;
427 }
428 if ((mXmppConnectionService.confirmMessages())
429 && ((packet.getId() != null))) {
430 if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
431 MessagePacket receipt = mXmppConnectionService
432 .getMessageGenerator().received(account, packet,
433 "urn:xmpp:chat-markers:0");
434 mXmppConnectionService.sendMessagePacket(account, receipt);
435 }
436 if (packet.hasChild("request", "urn:xmpp:receipts")) {
437 MessagePacket receipt = mXmppConnectionService
438 .getMessageGenerator().received(account, packet,
439 "urn:xmpp:receipts");
440 mXmppConnectionService.sendMessagePacket(account, receipt);
441 }
442 }
443 Conversation conversation = message.getConversation();
444 conversation.getMessages().add(message);
445 if (packet.getType() != MessagePacket.TYPE_ERROR) {
446 mXmppConnectionService.databaseBackend.createMessage(message);
447 }
448 notify = notify && !conversation.isMuted();
449 mXmppConnectionService.notifyUi(conversation, notify);
450 }
451
452 private void parseHeadline(MessagePacket packet, Account account) {
453 if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
454 Element event = packet.findChild("event",
455 "http://jabber.org/protocol/pubsub#event");
456 parseEvent(event, packet.getFrom(), account);
457 }
458 }
459
460 private void parseNick(MessagePacket packet, Account account) {
461 Element nick = packet.findChild("nick",
462 "http://jabber.org/protocol/nick");
463 if (nick != null) {
464 if (packet.getFrom() != null) {
465 Contact contact = account.getRoster().getContact(
466 packet.getFrom());
467 contact.setPresenceName(nick.getContent());
468 }
469 }
470 }
471}