1package eu.siacs.conversations.parser;
  2
  3import android.util.Log;
  4import android.util.Pair;
  5
  6import net.java.otr4j.session.Session;
  7import net.java.otr4j.session.SessionStatus;
  8
  9import eu.siacs.conversations.Config;
 10import eu.siacs.conversations.entities.Account;
 11import eu.siacs.conversations.entities.Contact;
 12import eu.siacs.conversations.entities.Conversation;
 13import eu.siacs.conversations.entities.Message;
 14import eu.siacs.conversations.entities.MucOptions;
 15import eu.siacs.conversations.http.HttpConnectionManager;
 16import eu.siacs.conversations.services.MessageArchiveService;
 17import eu.siacs.conversations.services.XmppConnectionService;
 18import eu.siacs.conversations.utils.CryptoHelper;
 19import eu.siacs.conversations.xml.Element;
 20import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
 21import eu.siacs.conversations.xmpp.chatstate.ChatState;
 22import eu.siacs.conversations.xmpp.jid.Jid;
 23import eu.siacs.conversations.xmpp.pep.Avatar;
 24import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
 25
 26public class MessageParser extends AbstractParser implements
 27		OnMessagePacketReceived {
 28	public MessageParser(XmppConnectionService service) {
 29		super(service);
 30	}
 31
 32	private boolean extractChatState(Conversation conversation, final MessagePacket packet) {
 33		ChatState state = ChatState.parse(packet);
 34		if (state != null && conversation != null) {
 35			final Account account = conversation.getAccount();
 36			Jid from = packet.getFrom();
 37			if (from.toBareJid().equals(account.getJid().toBareJid())) {
 38				conversation.setOutgoingChatState(state);
 39				return false;
 40			} else {
 41				return conversation.setIncomingChatState(state);
 42			}
 43		}
 44		return false;
 45	}
 46
 47	private Message parseOtrChat(String body, Jid from, String id, Conversation conversation) {
 48		String presence;
 49		if (from.isBareJid()) {
 50			presence = "";
 51		} else {
 52			presence = from.getResourcepart();
 53		}
 54		if (body.matches("^\\?OTRv\\d{1,2}\\?.*")) {
 55			conversation.endOtrIfNeeded();
 56		}
 57		if (!conversation.hasValidOtrSession()) {
 58			conversation.startOtrSession(presence,false);
 59		} else {
 60			String foreignPresence = conversation.getOtrSession().getSessionID().getUserID();
 61			if (!foreignPresence.equals(presence)) {
 62				conversation.endOtrIfNeeded();
 63				conversation.startOtrSession(presence, false);
 64			}
 65		}
 66		try {
 67			conversation.setLastReceivedOtrMessageId(id);
 68			Session otrSession = conversation.getOtrSession();
 69			SessionStatus before = otrSession.getSessionStatus();
 70			body = otrSession.transformReceiving(body);
 71			SessionStatus after = otrSession.getSessionStatus();
 72			if ((before != after) && (after == SessionStatus.ENCRYPTED)) {
 73				conversation.setNextEncryption(Message.ENCRYPTION_OTR);
 74				mXmppConnectionService.onOtrSessionEstablished(conversation);
 75			} else if ((before != after) && (after == SessionStatus.FINISHED)) {
 76				conversation.setNextEncryption(Message.ENCRYPTION_NONE);
 77				conversation.resetOtrSession();
 78				mXmppConnectionService.updateConversationUi();
 79			}
 80			if ((body == null) || (body.isEmpty())) {
 81				return null;
 82			}
 83			if (body.startsWith(CryptoHelper.FILETRANSFER)) {
 84				String key = body.substring(CryptoHelper.FILETRANSFER.length());
 85				conversation.setSymmetricKey(CryptoHelper.hexToBytes(key));
 86				return null;
 87			}
 88			Message finishedMessage = new Message(conversation, body, Message.ENCRYPTION_OTR, Message.STATUS_RECEIVED);
 89			conversation.setLastReceivedOtrMessageId(null);
 90			return finishedMessage;
 91		} catch (Exception e) {
 92			conversation.resetOtrSession();
 93			return null;
 94		}
 95	}
 96
 97	private class Invite {
 98		Jid jid;
 99		String password;
100		Invite(Jid jid, String password) {
101			this.jid = jid;
102			this.password = password;
103		}
104	}
105
106	private Invite extractInvite(Element message) {
107		Element x = message.findChild("x", "http://jabber.org/protocol/muc#user");
108		if (x != null) {
109			Element invite = x.findChild("invite");
110			if (invite != null) {
111				Element pw = x.findChild("password");
112				return new Invite(message.getAttributeAsJid("from"), pw != null ? pw.getContent(): null);
113			}
114		} else {
115			x = message.findChild("x","jabber:x:conference");
116			if (x != null) {
117				return new Invite(x.getAttributeAsJid("jid"),x.getAttribute("password"));
118			}
119		}
120		return null;
121	}
122
123	private void parseEvent(final Element event, final Jid from, final Account account) {
124		Element items = event.findChild("items");
125		if (items == null) {
126			return;
127		}
128		String node = items.getAttribute("node");
129		if (node == null) {
130			return;
131		}
132		if (node.equals("urn:xmpp:avatar:metadata")) {
133			Avatar avatar = Avatar.parseMetadata(items);
134			if (avatar != null) {
135				avatar.owner = from;
136				if (mXmppConnectionService.getFileBackend().isAvatarCached(
137						avatar)) {
138					if (account.getJid().toBareJid().equals(from)) {
139						if (account.setAvatar(avatar.getFilename())) {
140							mXmppConnectionService.databaseBackend
141									.updateAccount(account);
142						}
143						mXmppConnectionService.getAvatarService().clear(
144								account);
145						mXmppConnectionService.updateConversationUi();
146						mXmppConnectionService.updateAccountUi();
147					} else {
148						Contact contact = account.getRoster().getContact(
149								from);
150						contact.setAvatar(avatar);
151						mXmppConnectionService.getAvatarService().clear(
152								contact);
153						mXmppConnectionService.updateConversationUi();
154						mXmppConnectionService.updateRosterUi();
155					}
156				} else {
157					mXmppConnectionService.fetchAvatar(account, avatar);
158				}
159			}
160		} else if (node.equals("http://jabber.org/protocol/nick")) {
161			Element item = items.findChild("item");
162			if (item != null) {
163				Element nick = item.findChild("nick",
164						"http://jabber.org/protocol/nick");
165				if (nick != null) {
166					if (from != null) {
167						Contact contact = account.getRoster().getContact(
168								from);
169						contact.setPresenceName(nick.getContent());
170						mXmppConnectionService.getAvatarService().clear(account);
171						mXmppConnectionService.updateConversationUi();
172						mXmppConnectionService.updateAccountUi();
173					}
174				}
175			}
176		}
177	}
178
179	@Override
180	public void onMessagePacketReceived(Account account, MessagePacket original) {
181		final MessagePacket packet;
182		Long timestamp = null;
183		final boolean isForwarded;
184		String serverMsgId = null;
185		final Element fin = original.findChild("fin", "urn:xmpp:mam:0");
186		if (fin != null) {
187			mXmppConnectionService.getMessageArchiveService().processFin(fin,original.getFrom());
188			return;
189		}
190		final Element result = original.findChild("result","urn:xmpp:mam:0");
191		final MessageArchiveService.Query query = result == null ? null : mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
192		if (query != null && query.validFrom(original.getFrom())) {
193			Pair<MessagePacket, Long> f = original.getForwardedMessagePacket("result", "urn:xmpp:mam:0");
194			if (f == null) {
195				return;
196			}
197			timestamp = f.second;
198			packet = f.first;
199			isForwarded = true;
200			serverMsgId = result.getAttribute("id");
201			query.incrementTotalCount();
202		} else if (query != null) {
203			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received mam result from invalid sender");
204			return;
205		} else if (original.fromServer(account)) {
206			Pair<MessagePacket, Long> f;
207			f = original.getForwardedMessagePacket("received", "urn:xmpp:carbons:2");
208			f = f == null ? original.getForwardedMessagePacket("sent", "urn:xmpp:carbons:2") : f;
209			packet = f != null ? f.first : original;
210			timestamp = f != null ? f.second : null;
211			isForwarded = f != null;
212		} else {
213			packet = original;
214			isForwarded = false;
215		}
216		if (timestamp == null) {
217			timestamp = AbstractParser.getTimestamp(packet, System.currentTimeMillis());
218		}
219		final String body = packet.getBody();
220		final String encrypted = packet.findChildContent("x", "jabber:x:encrypted");
221		int status;
222		final Jid counterpart;
223		final Jid to = packet.getTo();
224		final Jid from = packet.getFrom();
225		final String remoteMsgId = packet.getId();
226		boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
227		boolean properlyAddressed = !to.isBareJid() || account.countPresences() == 1;
228		if (packet.fromAccount(account)) {
229			status = Message.STATUS_SEND;
230			counterpart = to;
231		} else {
232			status = Message.STATUS_RECEIVED;
233			counterpart = from;
234		}
235
236		if (from == null || to == null) {
237			Log.d(Config.LOGTAG,"no to or from in: "+packet.toString());
238			return;
239		}
240
241		Invite invite = extractInvite(packet);
242		if (invite != null && invite.jid != null) {
243			Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, invite.jid, true,query);
244			if (!conversation.getMucOptions().online()) {
245				conversation.getMucOptions().setPassword(invite.password);
246				mXmppConnectionService.databaseBackend.updateConversation(conversation);
247				mXmppConnectionService.joinMuc(conversation);
248				mXmppConnectionService.updateConversationUi();
249			}
250			return;
251		}
252
253		if (extractChatState(mXmppConnectionService.find(account,from), packet)) {
254			mXmppConnectionService.updateConversationUi();
255		}
256
257		if (body != null || encrypted != null) {
258			Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.toBareJid(), isTypeGroupChat);
259			if (isTypeGroupChat) {
260				if (counterpart.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
261					status = Message.STATUS_SEND;
262					if (mXmppConnectionService.markMessage(conversation, remoteMsgId, Message.STATUS_SEND_RECEIVED)) {
263						return;
264					} else if (remoteMsgId == null) {
265						Message message = conversation.findSentMessageWithBody(packet.getBody());
266						if (message != null) {
267							mXmppConnectionService.markMessage(message, Message.STATUS_SEND_RECEIVED);
268							return;
269						}
270					}
271				} else {
272					status = Message.STATUS_RECEIVED;
273				}
274			}
275			Message message;
276			if (body != null && body.startsWith("?OTR")) {
277				if (!isForwarded && !isTypeGroupChat && properlyAddressed) {
278					message = parseOtrChat(body, from, remoteMsgId, conversation);
279					if (message == null) {
280						return;
281					}
282				} else {
283					message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
284				}
285			} else if (encrypted != null) {
286				message = new Message(conversation, encrypted, Message.ENCRYPTION_PGP, status);
287			} else {
288				message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
289			}
290			message.setCounterpart(counterpart);
291			message.setRemoteMsgId(remoteMsgId);
292			message.setServerMsgId(serverMsgId);
293			message.setTime(timestamp);
294			message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
295			if (conversation.getMode() == Conversation.MODE_MULTI) {
296				message.setTrueCounterpart(conversation.getMucOptions().getTrueCounterpart(counterpart.getResourcepart()));
297				if (!isTypeGroupChat) {
298					message.setType(Message.TYPE_PRIVATE);
299				}
300			}
301			updateLastseen(packet,account,true);
302			boolean checkForDuplicates = serverMsgId != null || (isTypeGroupChat && packet.hasChild("delay","urn:xmpp:delay"));
303			if (checkForDuplicates && conversation.hasDuplicateMessage(message)) {
304				Log.d(Config.LOGTAG,"skipping duplicate message from "+message.getCounterpart().toString()+" "+message.getBody());
305				return;
306			}
307			if (query != null) {
308				query.incrementMessageCount();
309			}
310			conversation.add(message);
311			if (serverMsgId == null) {
312				if (status == Message.STATUS_SEND) {
313					mXmppConnectionService.markRead(conversation);
314					account.activateGracePeriod();
315				} else {
316					message.markUnread();
317				}
318				mXmppConnectionService.updateConversationUi();
319			}
320
321			if (mXmppConnectionService.confirmMessages() && remoteMsgId != null && !isForwarded) {
322				if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
323					MessagePacket receipt = mXmppConnectionService
324							.getMessageGenerator().received(account, packet, "urn:xmpp:chat-markers:0");
325					mXmppConnectionService.sendMessagePacket(account, receipt);
326				}
327				if (packet.hasChild("request", "urn:xmpp:receipts")) {
328					MessagePacket receipt = mXmppConnectionService
329							.getMessageGenerator().received(account, packet, "urn:xmpp:receipts");
330					mXmppConnectionService.sendMessagePacket(account, receipt);
331				}
332			}
333			if (account.getXmppConnection() != null && account.getXmppConnection().getFeatures().advancedStreamFeaturesLoaded()) {
334				if (conversation.setLastMessageTransmitted(System.currentTimeMillis())) {
335					mXmppConnectionService.updateConversation(conversation);
336				}
337			}
338
339			if (message.getStatus() == Message.STATUS_RECEIVED
340					&& conversation.getOtrSession() != null
341					&& !conversation.getOtrSession().getSessionID().getUserID()
342					.equals(message.getCounterpart().getResourcepart())) {
343				conversation.endOtrIfNeeded();
344			}
345
346			if (message.getEncryption() == Message.ENCRYPTION_NONE || mXmppConnectionService.saveEncryptedMessages()) {
347				mXmppConnectionService.databaseBackend.createMessage(message);
348			}
349			final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
350			if (message.trusted() && message.bodyContainsDownloadable() && manager.getAutoAcceptFileSize() > 0) {
351				manager.createNewConnection(message);
352			} else if (!message.isRead()) {
353				mXmppConnectionService.getNotificationService().push(message);
354			}
355		} else { //no body
356			if (packet.hasChild("subject") && isTypeGroupChat) {
357				Conversation conversation = mXmppConnectionService.find(account, from.toBareJid());
358				if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
359					conversation.setHasMessagesLeftOnServer(true);
360					conversation.getMucOptions().setSubject(packet.findChildContent("subject"));
361					mXmppConnectionService.updateConversationUi();
362					return;
363				}
364			}
365		}
366
367		Element received = packet.findChild("received", "urn:xmpp:chat-markers:0");
368		if (received == null) {
369			received = packet.findChild("received", "urn:xmpp:receipts");
370		}
371		if (received != null && !packet.fromAccount(account)) {
372			mXmppConnectionService.markMessage(account, from.toBareJid(), received.getAttribute("id"), Message.STATUS_SEND_RECEIVED);
373		}
374		Element displayed = packet.findChild("displayed", "urn:xmpp:chat-markers:0");
375		if (displayed != null) {
376			if (packet.fromAccount(account)) {
377				Conversation conversation = mXmppConnectionService.find(account,counterpart.toBareJid());
378				if (conversation != null) {
379					mXmppConnectionService.markRead(conversation);
380				}
381			} else {
382				updateLastseen(packet, account, true);
383				final Message displayedMessage = mXmppConnectionService.markMessage(account, from.toBareJid(), displayed.getAttribute("id"), Message.STATUS_SEND_DISPLAYED);
384				Message message = displayedMessage == null ? null : displayedMessage.prev();
385				while (message != null
386						&& message.getStatus() == Message.STATUS_SEND_RECEIVED
387						&& message.getTimeSent() < displayedMessage.getTimeSent()) {
388					mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
389					message = message.prev();
390				}
391			}
392		}
393
394		Element event = packet.findChild("event", "http://jabber.org/protocol/pubsub#event");
395		if (event != null) {
396			parseEvent(event, from, account);
397		}
398
399		String nick = packet.findChildContent("nick", "http://jabber.org/protocol/nick");
400		if (nick != null) {
401			Contact contact = account.getRoster().getContact(from);
402			contact.setPresenceName(nick);
403		}
404	}
405}