1package de.gultsch.chat.utils;
2
3import java.util.List;
4
5import net.java.otr4j.session.Session;
6import net.java.otr4j.session.SessionStatus;
7import android.util.Log;
8import de.gultsch.chat.entities.Account;
9import de.gultsch.chat.entities.Conversation;
10import de.gultsch.chat.entities.Message;
11import de.gultsch.chat.services.XmppConnectionService;
12import de.gultsch.chat.xml.Element;
13import de.gultsch.chat.xmpp.MessagePacket;
14
15public class MessageParser {
16
17 protected static final String LOGTAG = "xmppService";
18
19 public static Message parsePlainTextChat(MessagePacket packet, Account account, XmppConnectionService service) {
20 String[] fromParts = packet.getFrom().split("/");
21 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
22 String body = packet.getBody();
23 return new Message(conversation, packet.getFrom(), body, Message.ENCRYPTION_NONE, Message.STATUS_RECIEVED);
24 }
25
26 public static Message parseOtrChat(MessagePacket packet, Account account, XmppConnectionService service) {
27 String[] fromParts = packet.getFrom().split("/");
28 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
29 String body = packet.getBody();
30 if (!conversation.hasValidOtrSession()) {
31 conversation.startOtrSession(service.getApplicationContext(), fromParts[1]);
32 }
33 try {
34 Session otrSession = conversation.getOtrSession();
35 SessionStatus before = otrSession
36 .getSessionStatus();
37 body = otrSession.transformReceiving(body);
38 SessionStatus after = otrSession.getSessionStatus();
39 if ((before != after)
40 && (after == SessionStatus.ENCRYPTED)) {
41 Log.d(LOGTAG, "otr session etablished");
42 List<Message> messages = conversation
43 .getMessages();
44 for (int i = 0; i < messages.size(); ++i) {
45 Message msg = messages.get(i);
46 if ((msg.getStatus() == Message.STATUS_UNSEND)
47 && (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
48 MessagePacket outPacket = service.prepareMessagePacket(
49 account, msg, otrSession);
50 msg.setStatus(Message.STATUS_SEND);
51 service.databaseBackend.updateMessage(msg);
52 account.getXmppConnection()
53 .sendMessagePacket(outPacket);
54 }
55 }
56 if (service.convChangedListener!=null) {
57 service.convChangedListener.onConversationListChanged();
58 }
59 } else if ((before != after) && (after == SessionStatus.FINISHED)) {
60 conversation.resetOtrSession();
61 Log.d(LOGTAG,"otr session stoped");
62 }
63 } catch (Exception e) {
64 Log.d(LOGTAG, "error receiving otr. resetting");
65 conversation.resetOtrSession();
66 return null;
67 }
68 if (body == null) {
69 return null;
70 }
71 return new Message(conversation, packet.getFrom(), body, Message.ENCRYPTION_OTR,Message.STATUS_RECIEVED);
72 }
73
74 public static Message parseGroupchat(MessagePacket packet, Account account, XmppConnectionService service) {
75 int status;
76 String[] fromParts = packet.getFrom().split("/");
77 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],true);
78 if ((fromParts.length == 1) || (packet.hasChild("subject"))) {
79 return null;
80 }
81 String counterPart = fromParts[1];
82 if (counterPart.equals(account.getUsername())) {
83 status = Message.STATUS_SEND;
84 } else {
85 status = Message.STATUS_RECIEVED;
86 }
87 return new Message(conversation, counterPart, packet.getBody(), Message.ENCRYPTION_NONE, status);
88 }
89
90 public static Message parseCarbonMessage(MessagePacket packet,
91 Account account, XmppConnectionService service) {
92 // TODO Auto-generated method stub
93 int status;
94 String fullJid;
95 Element forwarded;
96 if (packet.hasChild("received")) {
97 forwarded = packet.findChild("received").findChild(
98 "forwarded");
99 status = Message.STATUS_RECIEVED;
100 } else if (packet.hasChild("sent")) {
101 forwarded = packet.findChild("sent").findChild(
102 "forwarded");
103 status = Message.STATUS_SEND;
104 } else {
105 return null;
106 }
107 Element message = forwarded.findChild("message");
108 if ((message == null) || (!message.hasChild("body")))
109 return null; // either malformed or boring
110 if (status == Message.STATUS_RECIEVED) {
111 fullJid = message.getAttribute("from");
112 } else {
113 fullJid = message.getAttribute("to");
114 }
115 String[] parts = fullJid.split("/");
116 Conversation conversation = service.findOrCreateConversation(account, parts[0],false);
117 return new Message(conversation,fullJid, message.findChild("body").getContent(), Message.ENCRYPTION_NONE,status);
118 }
119
120 public static Message parseError(MessagePacket packet, Account account, XmppConnectionService service) {
121
122 String[] fromParts = packet.getFrom().split("/");
123 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
124 Element error = packet.findChild("error");
125 String errorName = error.getChildren().get(0).getName();
126 String displayError;
127 if (errorName.equals("service-unavailable")) {
128 displayError = "Contact is offline and does not have offline storage";
129 } else {
130 displayError = errorName.replace("-", " ");
131 }
132 return new Message(conversation, packet.getFrom(), displayError, Message.ENCRYPTION_NONE, Message.STATUS_ERROR);
133 }
134}