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 ((fromParts.length == 1) || (packet.hasChild("subject"))) {
100 return null;
101 }
102 String counterPart = fromParts[1];
103 if (counterPart.equals(conversation.getMucOptions().getNick())) {
104 status = Message.STATUS_SEND;
105 } else {
106 status = Message.STATUS_RECIEVED;
107 }
108 return new Message(conversation, counterPart, packet.getBody(), Message.ENCRYPTION_NONE, status);
109 }
110
111 public static Message parseCarbonMessage(MessagePacket packet,
112 Account account, XmppConnectionService service) {
113 // TODO Auto-generated method stub
114 int status;
115 String fullJid;
116 Element forwarded;
117 if (packet.hasChild("received")) {
118 forwarded = packet.findChild("received").findChild(
119 "forwarded");
120 status = Message.STATUS_RECIEVED;
121 } else if (packet.hasChild("sent")) {
122 forwarded = packet.findChild("sent").findChild(
123 "forwarded");
124 status = Message.STATUS_SEND;
125 } else {
126 return null;
127 }
128 Element message = forwarded.findChild("message");
129 if ((message == null) || (!message.hasChild("body")))
130 return null; // either malformed or boring
131 if (status == Message.STATUS_RECIEVED) {
132 fullJid = message.getAttribute("from");
133 } else {
134 fullJid = message.getAttribute("to");
135 }
136 String[] parts = fullJid.split("/");
137 Conversation conversation = service.findOrCreateConversation(account, parts[0],false);
138 return new Message(conversation,fullJid, message.findChild("body").getContent(), Message.ENCRYPTION_NONE,status);
139 }
140
141 public static Message parseError(MessagePacket packet, Account account, XmppConnectionService service) {
142
143 String[] fromParts = packet.getFrom().split("/");
144 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
145 Element error = packet.findChild("error");
146 String errorName = error.getChildren().get(0).getName();
147 String displayError;
148 if (errorName.equals("service-unavailable")) {
149 displayError = "Contact is offline and does not have offline storage";
150 } else {
151 displayError = errorName.replace("-", " ");
152 }
153 return new Message(conversation, packet.getFrom(), displayError, Message.ENCRYPTION_NONE, Message.STATUS_ERROR);
154 }
155
156 public static String getPgpBody(MessagePacket packet) {
157 for(Element child : packet.getChildren()) {
158 if (child.getName().equals("x")&&child.getAttribute("xmlns").equals("jabber:x:encrypted")) {
159 return child.getContent();
160 }
161 }
162 return null;
163 }
164}