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