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.Conversation;
7import eu.siacs.conversations.entities.Message;
8import eu.siacs.conversations.services.XmppConnectionService;
9import eu.siacs.conversations.utils.CryptoHelper;
10import eu.siacs.conversations.xml.Element;
11import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
12
13public class MessageParser extends AbstractParser {
14
15 public MessageParser(XmppConnectionService service) {
16 super(service);
17 }
18
19 public Message parseChat(MessagePacket packet, Account account) {
20 String[] fromParts = packet.getFrom().split("/");
21 Conversation conversation = mXmppConnectionService
22 .findOrCreateConversation(account, fromParts[0], false);
23 conversation.setLatestMarkableMessageId(getMarkableMessageId(packet));
24 updateLastseen(packet, account,true);
25 String pgpBody = getPgpBody(packet);
26 Message finishedMessage;
27 if (pgpBody != null) {
28 finishedMessage = new Message(conversation, packet.getFrom(), pgpBody,
29 Message.ENCRYPTION_PGP, Message.STATUS_RECIEVED);
30 } else {
31 finishedMessage = new Message(conversation, packet.getFrom(),
32 packet.getBody(), Message.ENCRYPTION_NONE,
33 Message.STATUS_RECIEVED);
34 }
35 finishedMessage.setTime(getTimestamp(packet));
36 return finishedMessage;
37 }
38
39 public Message parseOtrChat(MessagePacket packet, Account account) {
40 boolean properlyAddressed = (packet.getTo().split("/").length == 2)
41 || (account.countPresences() == 1);
42 String[] fromParts = packet.getFrom().split("/");
43 Conversation conversation = mXmppConnectionService
44 .findOrCreateConversation(account, fromParts[0], false);
45 updateLastseen(packet, account,true);
46 String body = packet.getBody();
47 if (!conversation.hasValidOtrSession()) {
48 if (properlyAddressed) {
49 conversation.startOtrSession(
50 mXmppConnectionService.getApplicationContext(),
51 fromParts[1], false);
52 } else {
53 return null;
54 }
55 } else {
56 String foreignPresence = conversation.getOtrSession()
57 .getSessionID().getUserID();
58 if (!foreignPresence.equals(fromParts[1])) {
59 conversation.resetOtrSession();
60 if (properlyAddressed) {
61 conversation.startOtrSession(
62 mXmppConnectionService.getApplicationContext(),
63 fromParts[1], false);
64 } else {
65 return null;
66 }
67 }
68 }
69 try {
70 Session otrSession = conversation.getOtrSession();
71 SessionStatus before = otrSession.getSessionStatus();
72 body = otrSession.transformReceiving(body);
73 SessionStatus after = otrSession.getSessionStatus();
74 if ((before != after) && (after == SessionStatus.ENCRYPTED)) {
75 mXmppConnectionService.onOtrSessionEstablished(conversation);
76 } else if ((before != after) && (after == SessionStatus.FINISHED)) {
77 conversation.resetOtrSession();
78 }
79 if ((body == null) || (body.isEmpty())) {
80 return null;
81 }
82 if (body.startsWith(CryptoHelper.FILETRANSFER)) {
83 String key = body.substring(CryptoHelper.FILETRANSFER.length());
84 conversation.setSymmetricKey(CryptoHelper.hexToBytes(key));
85 return null;
86 }
87 conversation.setLatestMarkableMessageId(getMarkableMessageId(packet));
88 Message finishedMessage = new Message(conversation, packet.getFrom(), body,
89 Message.ENCRYPTION_OTR, Message.STATUS_RECIEVED);
90 finishedMessage.setTime(getTimestamp(packet));
91 return finishedMessage;
92 } catch (Exception e) {
93 conversation.resetOtrSession();
94 return null;
95 }
96 }
97
98 public Message parseGroupchat(MessagePacket packet, Account account) {
99 int status;
100 String[] fromParts = packet.getFrom().split("/");
101 Conversation conversation = mXmppConnectionService
102 .findOrCreateConversation(account, fromParts[0], true);
103 if (packet.hasChild("subject")) {
104 conversation.getMucOptions().setSubject(
105 packet.findChild("subject").getContent());
106 mXmppConnectionService.updateUi(conversation, false);
107 return null;
108 }
109 if ((fromParts.length == 1)) {
110 return null;
111 }
112 String counterPart = fromParts[1];
113 if (counterPart.equals(conversation.getMucOptions().getNick())) {
114 if (mXmppConnectionService.markMessage(conversation,
115 packet.getId(), Message.STATUS_SEND)) {
116 return null;
117 } else {
118 status = Message.STATUS_SEND;
119 }
120 } else {
121 status = Message.STATUS_RECIEVED;
122 }
123 String pgpBody = getPgpBody(packet);
124 conversation.setLatestMarkableMessageId(getMarkableMessageId(packet));
125 Message finishedMessage;
126 if (pgpBody == null) {
127 finishedMessage = new Message(conversation, counterPart, packet.getBody(),
128 Message.ENCRYPTION_NONE, status);
129 } else {
130 finishedMessage= new Message(conversation, counterPart, pgpBody,
131 Message.ENCRYPTION_PGP, status);
132 }
133 finishedMessage.setTime(getTimestamp(packet));
134 return finishedMessage;
135 }
136
137 public Message parseCarbonMessage(MessagePacket packet, Account account) {
138 int status;
139 String fullJid;
140 Element forwarded;
141 if (packet.hasChild("received")) {
142 forwarded = packet.findChild("received").findChild("forwarded");
143 status = Message.STATUS_RECIEVED;
144 } else if (packet.hasChild("sent")) {
145 forwarded = packet.findChild("sent").findChild("forwarded");
146 status = Message.STATUS_SEND;
147 } else {
148 return null;
149 }
150 if (forwarded == null) {
151 return null;
152 }
153 Element message = forwarded.findChild("message");
154 if ((message == null) || (!message.hasChild("body")))
155 return null; // either malformed or boring
156 if (status == Message.STATUS_RECIEVED) {
157 fullJid = message.getAttribute("from");
158 updateLastseen(message, account,true);
159 } else {
160 fullJid = message.getAttribute("to");
161 }
162 String[] parts = fullJid.split("/");
163 Conversation conversation = mXmppConnectionService
164 .findOrCreateConversation(account, parts[0], false);
165 conversation.setLatestMarkableMessageId(getMarkableMessageId(packet));
166 String pgpBody = getPgpBody(message);
167 Message finishedMessage;
168 if (pgpBody != null) {
169 finishedMessage = new Message(conversation, fullJid, pgpBody,Message.ENCRYPTION_PGP, status);
170 } else {
171 String body = message.findChild("body").getContent();
172 finishedMessage= new Message(conversation, fullJid, body,Message.ENCRYPTION_NONE, status);
173 }
174 finishedMessage.setTime(getTimestamp(message));
175 return finishedMessage;
176 }
177
178 public void parseError(MessagePacket packet, Account account) {
179 String[] fromParts = packet.getFrom().split("/");
180 mXmppConnectionService.markMessage(account, fromParts[0],
181 packet.getId(), Message.STATUS_SEND_FAILED);
182 }
183
184 public void parseNormal(MessagePacket packet, Account account) {
185 if (packet.hasChild("displayed","urn:xmpp:chat-markers:0")) {
186 String id = packet.findChild("displayed","urn:xmpp:chat-markers:0").getAttribute("id");
187 String[] fromParts = packet.getFrom().split("/");
188 updateLastseen(packet, account,true);
189 mXmppConnectionService.markMessage(account,fromParts[0], id, Message.STATUS_SEND_DISPLAYED);
190 } else if (packet.hasChild("received","urn:xmpp:chat-markers:0")) {
191 String id = packet.findChild("received","urn:xmpp:chat-markers:0").getAttribute("id");
192 String[] fromParts = packet.getFrom().split("/");
193 updateLastseen(packet, account,false);
194 mXmppConnectionService.markMessage(account,fromParts[0], id, Message.STATUS_SEND_RECEIVED);
195 } else if (packet.hasChild("x")) {
196 Element x = packet.findChild("x");
197 if (x.hasChild("invite")) {
198 Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, packet.getFrom(),
199 true);
200 mXmppConnectionService.updateUi(conversation, false);
201 }
202
203 }
204 }
205
206 private String getPgpBody(Element message) {
207 Element child = message.findChild("x", "jabber:x:encrypted");
208 if (child == null) {
209 return null;
210 } else {
211 return child.getContent();
212 }
213 }
214
215 private String getMarkableMessageId(Element message) {
216 if (message.hasChild("markable", "urn:xmpp:chat-markers:0")) {
217 return message.getAttribute("id");
218 } else {
219 return null;
220 }
221 }
222
223
224}