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 String[] fromParts = packet.getFrom().split("/");
35 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
36 String body = packet.getBody();
37 if (!conversation.hasValidOtrSession()) {
38 conversation.startOtrSession(service.getApplicationContext(), fromParts[1]);
39 } else {
40 String foreignPresence = conversation.getOtrSession().getSessionID().getUserID();
41 if (!foreignPresence.equals(fromParts[1])) {
42 Log.d(LOGTAG,"new otr during existing otr session requested. ending old one");
43 try {
44 conversation.getOtrSession().endSession();
45 } catch (OtrException e) {
46 Log.d("xmppService","couldnt end old session");
47 }
48 Log.d("xmppService","starting new one with "+fromParts[1]);
49 conversation.startOtrSession(service.getApplicationContext(), fromParts[1]);
50 }
51 }
52 try {
53 Session otrSession = conversation.getOtrSession();
54 SessionStatus before = otrSession
55 .getSessionStatus();
56 body = otrSession.transformReceiving(body);
57 SessionStatus after = otrSession.getSessionStatus();
58 if ((before != after)
59 && (after == SessionStatus.ENCRYPTED)) {
60 Log.d(LOGTAG, "otr session etablished");
61 List<Message> messages = conversation
62 .getMessages();
63 for (int i = 0; i < messages.size(); ++i) {
64 Message msg = messages.get(i);
65 if ((msg.getStatus() == Message.STATUS_UNSEND)
66 && (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
67 MessagePacket outPacket = service.prepareMessagePacket(
68 account, msg, otrSession);
69 msg.setStatus(Message.STATUS_SEND);
70 service.databaseBackend.updateMessage(msg);
71 account.getXmppConnection()
72 .sendMessagePacket(outPacket);
73 }
74 }
75 if (service.convChangedListener!=null) {
76 service.convChangedListener.onConversationListChanged();
77 }
78 } else if ((before != after) && (after == SessionStatus.FINISHED)) {
79 conversation.resetOtrSession();
80 Log.d(LOGTAG,"otr session stoped");
81 }
82 } catch (Exception e) {
83 Log.d(LOGTAG, "error receiving otr. resetting");
84 conversation.resetOtrSession();
85 return null;
86 }
87
88 //isEmpty is a work around for some weird clients which send emtpty strings over otr
89 if ((body == null)||(body.isEmpty())) {
90 return null;
91 }
92 return new Message(conversation, packet.getFrom(), body, Message.ENCRYPTION_OTR,Message.STATUS_RECIEVED);
93 }
94
95 public static Message parseGroupchat(MessagePacket packet, Account account, XmppConnectionService service) {
96 int status;
97 String[] fromParts = packet.getFrom().split("/");
98 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],true);
99 if (packet.hasChild("subject")) {
100 conversation.getMucOptions().setSubject(packet.findChild("subject").getContent());
101 service.updateConversationInGui();
102 return null;
103 }
104 if ((fromParts.length == 1)) {
105 return null;
106 }
107 String counterPart = fromParts[1];
108 if (counterPart.equals(conversation.getMucOptions().getNick())) {
109 status = Message.STATUS_SEND;
110 } else {
111 status = Message.STATUS_RECIEVED;
112 }
113 return new Message(conversation, counterPart, packet.getBody(), Message.ENCRYPTION_NONE, status);
114 }
115
116 public static Message parseCarbonMessage(MessagePacket packet,
117 Account account, XmppConnectionService service) {
118 // TODO Auto-generated method stub
119 int status;
120 String fullJid;
121 Element forwarded;
122 if (packet.hasChild("received")) {
123 forwarded = packet.findChild("received").findChild(
124 "forwarded");
125 status = Message.STATUS_RECIEVED;
126 } else if (packet.hasChild("sent")) {
127 forwarded = packet.findChild("sent").findChild(
128 "forwarded");
129 status = Message.STATUS_SEND;
130 } else {
131 return null;
132 }
133 Element message = forwarded.findChild("message");
134 if ((message == null) || (!message.hasChild("body")))
135 return null; // either malformed or boring
136 if (status == Message.STATUS_RECIEVED) {
137 fullJid = message.getAttribute("from");
138 } else {
139 fullJid = message.getAttribute("to");
140 }
141 String[] parts = fullJid.split("/");
142 Conversation conversation = service.findOrCreateConversation(account, parts[0],false);
143 return new Message(conversation,fullJid, message.findChild("body").getContent(), Message.ENCRYPTION_NONE,status);
144 }
145
146 public static Message parseError(MessagePacket packet, Account account, XmppConnectionService service) {
147
148 String[] fromParts = packet.getFrom().split("/");
149 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
150 Element error = packet.findChild("error");
151 String errorName = error.getChildren().get(0).getName();
152 String displayError;
153 if (errorName.equals("service-unavailable")) {
154 displayError = "Contact is offline and does not have offline storage";
155 } else {
156 displayError = errorName.replace("-", " ");
157 }
158 return new Message(conversation, packet.getFrom(), displayError, Message.ENCRYPTION_NONE, Message.STATUS_ERROR);
159 }
160
161 public static String getPgpBody(MessagePacket packet) {
162 for(Element child : packet.getChildren()) {
163 if (child.getName().equals("x")&&child.getAttribute("xmlns").equals("jabber:x:encrypted")) {
164 return child.getContent();
165 }
166 }
167 return null;
168 }
169}