1package eu.siacs.conversations.utils;
2
3import java.util.List;
4
5import net.java.otr4j.session.Session;
6import net.java.otr4j.session.SessionStatus;
7import android.util.Log;
8import eu.siacs.conversations.entities.Account;
9import eu.siacs.conversations.entities.Conversation;
10import eu.siacs.conversations.entities.Message;
11import eu.siacs.conversations.services.XmppConnectionService;
12import eu.siacs.conversations.xml.Element;
13import eu.siacs.conversations.xmpp.stanzas.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 parsePgpChat(String pgpBody, MessagePacket packet, Account account, XmppConnectionService service) {
27 String[] fromParts = packet.getFrom().split("/");
28 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
29 return new Message(conversation, packet.getFrom(), pgpBody, Message.ENCRYPTION_PGP, Message.STATUS_RECIEVED);
30 }
31
32 public static Message parseOtrChat(MessagePacket packet, Account account, XmppConnectionService service) {
33 boolean properlyAddressed = (packet.getTo().split("/").length == 2) || (account.countPresences() == 1);
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 if (properlyAddressed) {
39 Log.d("xmppService","starting new otr session with "+packet.getFrom()+" because no valid otr session has been found");
40 conversation.startOtrSession(service.getApplicationContext(), fromParts[1],false);
41 } else {
42 Log.d("xmppService",account.getJid()+": ignoring otr session with "+fromParts[0]);
43 return null;
44 }
45 } else {
46 String foreignPresence = conversation.getOtrSession().getSessionID().getUserID();
47 if (!foreignPresence.equals(fromParts[1])) {
48 conversation.resetOtrSession();
49 if (properlyAddressed) {
50 Log.d("xmppService","replacing otr session with "+packet.getFrom());
51 conversation.startOtrSession(service.getApplicationContext(), fromParts[1],false);
52 } else {
53 return null;
54 }
55 }
56 }
57 try {
58 Session otrSession = conversation.getOtrSession();
59 SessionStatus before = otrSession
60 .getSessionStatus();
61 body = otrSession.transformReceiving(body);
62 SessionStatus after = otrSession.getSessionStatus();
63 if ((before != after)
64 && (after == SessionStatus.ENCRYPTED)) {
65 Log.d(LOGTAG, "otr session etablished");
66 List<Message> messages = conversation
67 .getMessages();
68 for (int i = 0; i < messages.size(); ++i) {
69 Message msg = messages.get(i);
70 if ((msg.getStatus() == Message.STATUS_UNSEND)
71 && (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
72 MessagePacket outPacket = service.prepareMessagePacket(
73 account, msg, otrSession);
74 msg.setStatus(Message.STATUS_SEND);
75 service.databaseBackend.updateMessage(msg);
76 account.getXmppConnection()
77 .sendMessagePacket(outPacket);
78 }
79 }
80 if (service.convChangedListener!=null) {
81 service.convChangedListener.onConversationListChanged();
82 }
83 } else if ((before != after) && (after == SessionStatus.FINISHED)) {
84 conversation.resetOtrSession();
85 Log.d(LOGTAG,"otr session stoped");
86 }
87 //isEmpty is a work around for some weird clients which send emtpty strings over otr
88 if ((body == null)||(body.isEmpty())) {
89 return null;
90 }
91 return new Message(conversation, packet.getFrom(), body, Message.ENCRYPTION_OTR,Message.STATUS_RECIEVED);
92 } catch (Exception e) {
93 conversation.resetOtrSession();
94 return null;
95 }
96 }
97
98 public static Message parseGroupchat(MessagePacket packet, Account account, XmppConnectionService service) {
99 int status;
100 String[] fromParts = packet.getFrom().split("/");
101 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],true);
102 if (packet.hasChild("subject")) {
103 conversation.getMucOptions().setSubject(packet.findChild("subject").getContent());
104 service.updateConversationInGui();
105 return null;
106 }
107 if ((fromParts.length == 1)) {
108 return null;
109 }
110 String counterPart = fromParts[1];
111 if (counterPart.equals(conversation.getMucOptions().getNick())) {
112 status = Message.STATUS_SEND;
113 } else {
114 status = Message.STATUS_RECIEVED;
115 }
116 return new Message(conversation, counterPart, packet.getBody(), Message.ENCRYPTION_NONE, status);
117 }
118
119 public static Message parseCarbonMessage(MessagePacket packet,
120 Account account, XmppConnectionService service) {
121 // TODO Auto-generated method stub
122 int status;
123 String fullJid;
124 Element forwarded;
125 if (packet.hasChild("received")) {
126 forwarded = packet.findChild("received").findChild(
127 "forwarded");
128 status = Message.STATUS_RECIEVED;
129 } else if (packet.hasChild("sent")) {
130 forwarded = packet.findChild("sent").findChild(
131 "forwarded");
132 status = Message.STATUS_SEND;
133 } else {
134 return null;
135 }
136 if (forwarded==null) {
137 return null;
138 }
139 Element message = forwarded.findChild("message");
140 if ((message == null) || (!message.hasChild("body")))
141 return null; // either malformed or boring
142 if (status == Message.STATUS_RECIEVED) {
143 fullJid = message.getAttribute("from");
144 } else {
145 fullJid = message.getAttribute("to");
146 }
147 String[] parts = fullJid.split("/");
148 Conversation conversation = service.findOrCreateConversation(account, parts[0],false);
149 return new Message(conversation,fullJid, message.findChild("body").getContent(), Message.ENCRYPTION_NONE,status);
150 }
151
152 public static void parseError(MessagePacket packet, Account account, XmppConnectionService service) {
153 String[] fromParts = packet.getFrom().split("/");
154 service.markMessage(account, fromParts[0], packet.getId(), Message.STATUS_SEND_FAILED);
155 }
156
157 public static String getPgpBody(MessagePacket packet) {
158 for(Element child : packet.getChildren()) {
159 if (child.getName().equals("x")&&child.getAttribute("xmlns").equals("jabber:x:encrypted")) {
160 return child.getContent();
161 }
162 }
163 return null;
164 }
165}