1package eu.siacs.conversations.utils;
2
3import java.util.List;
4
5import net.java.otr4j.OtrException;
6import net.java.otr4j.session.Session;
7import net.java.otr4j.session.SessionStatus;
8import android.util.Log;
9import eu.siacs.conversations.entities.Account;
10import eu.siacs.conversations.entities.Conversation;
11import eu.siacs.conversations.entities.Message;
12import eu.siacs.conversations.services.XmppConnectionService;
13import eu.siacs.conversations.xml.Element;
14import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
15
16public class MessageParser {
17
18 protected static final String LOGTAG = "xmppService";
19
20 public static Message parsePlainTextChat(MessagePacket packet, Account account, XmppConnectionService service) {
21 String[] fromParts = packet.getFrom().split("/");
22 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
23 String body = packet.getBody();
24 return new Message(conversation, packet.getFrom(), body, Message.ENCRYPTION_NONE, Message.STATUS_RECIEVED);
25 }
26
27 public static Message parsePgpChat(String pgpBody, MessagePacket packet, Account account, XmppConnectionService service) {
28 String[] fromParts = packet.getFrom().split("/");
29 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
30 return new Message(conversation, packet.getFrom(), pgpBody, Message.ENCRYPTION_PGP, Message.STATUS_RECIEVED);
31 }
32
33 public static Message parseOtrChat(MessagePacket packet, Account account, XmppConnectionService service) {
34 boolean justStarted = false;
35 boolean properlyAddressed = (packet.getTo().split("/").length == 2) || (account.countPresences() == 1);
36 String[] fromParts = packet.getFrom().split("/");
37 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
38 String body = packet.getBody();
39 if (!conversation.hasValidOtrSession()) {
40 if (properlyAddressed) {
41 Log.d("xmppService","starting new otr session with "+packet.getFrom()+" because no valid otr session has been found");
42 conversation.startOtrSession(service.getApplicationContext(), fromParts[1]);
43 justStarted = true;
44 } else {
45 Log.d("xmppService",account.getJid()+": ignoring otr session with "+fromParts[0]);
46 return null;
47 }
48 } else {
49 String foreignPresence = conversation.getOtrSession().getSessionID().getUserID();
50 if (!foreignPresence.equals(fromParts[1])) {
51 conversation.resetOtrSession();
52 if (properlyAddressed) {
53 Log.d("xmppService","replacing otr session with "+packet.getFrom());
54 conversation.startOtrSession(service.getApplicationContext(), fromParts[1]);
55 justStarted = true;
56 } else {
57 return null;
58 }
59 }
60 }
61 try {
62 Session otrSession = conversation.getOtrSession();
63 SessionStatus before = otrSession
64 .getSessionStatus();
65 body = otrSession.transformReceiving(body);
66 SessionStatus after = otrSession.getSessionStatus();
67 if ((before != after)
68 && (after == SessionStatus.ENCRYPTED)) {
69 Log.d(LOGTAG, "otr session etablished");
70 List<Message> messages = conversation
71 .getMessages();
72 for (int i = 0; i < messages.size(); ++i) {
73 Message msg = messages.get(i);
74 if ((msg.getStatus() == Message.STATUS_UNSEND)
75 && (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
76 MessagePacket outPacket = service.prepareMessagePacket(
77 account, msg, otrSession);
78 msg.setStatus(Message.STATUS_SEND);
79 service.databaseBackend.updateMessage(msg);
80 account.getXmppConnection()
81 .sendMessagePacket(outPacket);
82 }
83 }
84 if (service.convChangedListener!=null) {
85 service.convChangedListener.onConversationListChanged();
86 }
87 } else if ((before != after) && (after == SessionStatus.FINISHED)) {
88 conversation.resetOtrSession();
89 Log.d(LOGTAG,"otr session stoped");
90 }
91 } catch (Exception e) {
92 Log.d(LOGTAG,"otr execption");
93 if (justStarted) {
94 Log.d(LOGTAG,"ran into safeguard");
95 } else {
96 Log.d(LOGTAG,"resett otr session");
97 conversation.resetOtrSession();
98 }
99 return null;
100 }
101
102 //isEmpty is a work around for some weird clients which send emtpty strings over otr
103 if ((body == null)||(body.isEmpty())) {
104 return null;
105 }
106 return new Message(conversation, packet.getFrom(), body, Message.ENCRYPTION_OTR,Message.STATUS_RECIEVED);
107 }
108
109 public static Message parseGroupchat(MessagePacket packet, Account account, XmppConnectionService service) {
110 int status;
111 String[] fromParts = packet.getFrom().split("/");
112 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],true);
113 if (packet.hasChild("subject")) {
114 conversation.getMucOptions().setSubject(packet.findChild("subject").getContent());
115 service.updateConversationInGui();
116 return null;
117 }
118 if ((fromParts.length == 1)) {
119 return null;
120 }
121 String counterPart = fromParts[1];
122 if (counterPart.equals(conversation.getMucOptions().getNick())) {
123 status = Message.STATUS_SEND;
124 } else {
125 status = Message.STATUS_RECIEVED;
126 }
127 return new Message(conversation, counterPart, packet.getBody(), Message.ENCRYPTION_NONE, status);
128 }
129
130 public static Message parseCarbonMessage(MessagePacket packet,
131 Account account, XmppConnectionService service) {
132 // TODO Auto-generated method stub
133 int status;
134 String fullJid;
135 Element forwarded;
136 if (packet.hasChild("received")) {
137 forwarded = packet.findChild("received").findChild(
138 "forwarded");
139 status = Message.STATUS_RECIEVED;
140 } else if (packet.hasChild("sent")) {
141 forwarded = packet.findChild("sent").findChild(
142 "forwarded");
143 status = Message.STATUS_SEND;
144 } else {
145 return null;
146 }
147 Element message = forwarded.findChild("message");
148 if ((message == null) || (!message.hasChild("body")))
149 return null; // either malformed or boring
150 if (status == Message.STATUS_RECIEVED) {
151 fullJid = message.getAttribute("from");
152 } else {
153 fullJid = message.getAttribute("to");
154 }
155 String[] parts = fullJid.split("/");
156 Conversation conversation = service.findOrCreateConversation(account, parts[0],false);
157 return new Message(conversation,fullJid, message.findChild("body").getContent(), Message.ENCRYPTION_NONE,status);
158 }
159
160 public static Message parseError(MessagePacket packet, Account account, XmppConnectionService service) {
161
162 String[] fromParts = packet.getFrom().split("/");
163 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
164 Element error = packet.findChild("error");
165 String errorName = error.getChildren().get(0).getName();
166 String displayError;
167 if (errorName.equals("service-unavailable")) {
168 displayError = "Contact is offline and does not have offline storage";
169 } else {
170 displayError = errorName.replace("-", " ");
171 }
172 return new Message(conversation, packet.getFrom(), displayError, Message.ENCRYPTION_NONE, Message.STATUS_ERROR);
173 }
174
175 public static String getPgpBody(MessagePacket packet) {
176 for(Element child : packet.getChildren()) {
177 if (child.getName().equals("x")&&child.getAttribute("xmlns").equals("jabber:x:encrypted")) {
178 return child.getContent();
179 }
180 }
181 return null;
182 }
183}