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 Log.d(LOGTAG,"otr message received: "+packet.toString());
35 String[] fromParts = packet.getFrom().split("/");
36 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
37 String body = packet.getBody();
38 if (!conversation.hasValidOtrSession()) {
39 conversation.startOtrSession(service.getApplicationContext(), fromParts[1]);
40 } else {
41 String foreignPresence = conversation.getOtrSession().getSessionID().getUserID();
42 if (!foreignPresence.equals(fromParts[1])) {
43 Log.d(LOGTAG,"new otr during existing otr session requested. ending old one");
44 try {
45 conversation.getOtrSession().endSession();
46 } catch (OtrException e) {
47 Log.d("xmppService","couldnt end old session");
48 }
49 Log.d("xmppService","starting new one with "+fromParts[1]);
50 conversation.startOtrSession(service.getApplicationContext(), fromParts[1]);
51 }
52 }
53 try {
54 Session otrSession = conversation.getOtrSession();
55 SessionStatus before = otrSession
56 .getSessionStatus();
57 body = otrSession.transformReceiving(body);
58 SessionStatus after = otrSession.getSessionStatus();
59 if ((before != after)
60 && (after == SessionStatus.ENCRYPTED)) {
61 Log.d(LOGTAG, "otr session etablished");
62 List<Message> messages = conversation
63 .getMessages();
64 for (int i = 0; i < messages.size(); ++i) {
65 Message msg = messages.get(i);
66 if ((msg.getStatus() == Message.STATUS_UNSEND)
67 && (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
68 MessagePacket outPacket = service.prepareMessagePacket(
69 account, msg, otrSession);
70 msg.setStatus(Message.STATUS_SEND);
71 service.databaseBackend.updateMessage(msg);
72 account.getXmppConnection()
73 .sendMessagePacket(outPacket);
74 }
75 }
76 if (service.convChangedListener!=null) {
77 service.convChangedListener.onConversationListChanged();
78 }
79 } else if ((before != after) && (after == SessionStatus.FINISHED)) {
80 conversation.resetOtrSession();
81 Log.d(LOGTAG,"otr session stoped");
82 }
83 } catch (Exception e) {
84 Log.d(LOGTAG, "error receiving otr. resetting");
85 conversation.resetOtrSession();
86 return null;
87 }
88 if (body == null) {
89 return null;
90 }
91 return new Message(conversation, packet.getFrom(), body, Message.ENCRYPTION_OTR,Message.STATUS_RECIEVED);
92 }
93
94 public static Message parseGroupchat(MessagePacket packet, Account account, XmppConnectionService service) {
95 int status;
96 String[] fromParts = packet.getFrom().split("/");
97 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],true);
98 if ((fromParts.length == 1) || (packet.hasChild("subject"))) {
99 return null;
100 }
101 String counterPart = fromParts[1];
102 if (counterPart.equals(conversation.getMucOptions().getNick())) {
103 status = Message.STATUS_SEND;
104 } else {
105 status = Message.STATUS_RECIEVED;
106 }
107 return new Message(conversation, counterPart, packet.getBody(), Message.ENCRYPTION_NONE, status);
108 }
109
110 public static Message parseCarbonMessage(MessagePacket packet,
111 Account account, XmppConnectionService service) {
112 // TODO Auto-generated method stub
113 int status;
114 String fullJid;
115 Element forwarded;
116 if (packet.hasChild("received")) {
117 forwarded = packet.findChild("received").findChild(
118 "forwarded");
119 status = Message.STATUS_RECIEVED;
120 } else if (packet.hasChild("sent")) {
121 forwarded = packet.findChild("sent").findChild(
122 "forwarded");
123 status = Message.STATUS_SEND;
124 } else {
125 return null;
126 }
127 Element message = forwarded.findChild("message");
128 if ((message == null) || (!message.hasChild("body")))
129 return null; // either malformed or boring
130 if (status == Message.STATUS_RECIEVED) {
131 fullJid = message.getAttribute("from");
132 } else {
133 fullJid = message.getAttribute("to");
134 }
135 String[] parts = fullJid.split("/");
136 Conversation conversation = service.findOrCreateConversation(account, parts[0],false);
137 return new Message(conversation,fullJid, message.findChild("body").getContent(), Message.ENCRYPTION_NONE,status);
138 }
139
140 public static Message parseError(MessagePacket packet, Account account, XmppConnectionService service) {
141
142 String[] fromParts = packet.getFrom().split("/");
143 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
144 Element error = packet.findChild("error");
145 String errorName = error.getChildren().get(0).getName();
146 String displayError;
147 if (errorName.equals("service-unavailable")) {
148 displayError = "Contact is offline and does not have offline storage";
149 } else {
150 displayError = errorName.replace("-", " ");
151 }
152 return new Message(conversation, packet.getFrom(), displayError, Message.ENCRYPTION_NONE, Message.STATUS_ERROR);
153 }
154
155 public static String getPgpBody(MessagePacket packet) {
156 for(Element child : packet.getChildren()) {
157 if (child.getName().equals("x")&&child.getAttribute("xmlns").equals("jabber:x:encrypted")) {
158 return child.getContent();
159 }
160 }
161 return null;
162 }
163}