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 service.updateUi(conversation, false);
81 } else if ((before != after) && (after == SessionStatus.FINISHED)) {
82 conversation.resetOtrSession();
83 Log.d(LOGTAG,"otr session stoped");
84 }
85 //isEmpty is a work around for some weird clients which send emtpty strings over otr
86 if ((body == null)||(body.isEmpty())) {
87 return null;
88 }
89 return new Message(conversation, packet.getFrom(), body, Message.ENCRYPTION_OTR,Message.STATUS_RECIEVED);
90 } catch (Exception e) {
91 conversation.resetOtrSession();
92 return null;
93 }
94 }
95
96 public static Message parseGroupchat(MessagePacket packet, Account account, XmppConnectionService service) {
97 int status;
98 String[] fromParts = packet.getFrom().split("/");
99 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],true);
100 if (packet.hasChild("subject")) {
101 conversation.getMucOptions().setSubject(packet.findChild("subject").getContent());
102 service.updateUi(conversation, false);
103 return null;
104 }
105 if ((fromParts.length == 1)) {
106 return null;
107 }
108 String counterPart = fromParts[1];
109 if (counterPart.equals(conversation.getMucOptions().getNick())) {
110 status = Message.STATUS_SEND;
111 } else {
112 status = Message.STATUS_RECIEVED;
113 }
114 return new Message(conversation, counterPart, packet.getBody(), Message.ENCRYPTION_NONE, status);
115 }
116
117 public static Message parseCarbonMessage(MessagePacket packet,
118 Account account, XmppConnectionService service) {
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 if (forwarded==null) {
134 return null;
135 }
136 Element message = forwarded.findChild("message");
137 if ((message == null) || (!message.hasChild("body")))
138 return null; // either malformed or boring
139 if (status == Message.STATUS_RECIEVED) {
140 fullJid = message.getAttribute("from");
141 } else {
142 fullJid = message.getAttribute("to");
143 }
144 String[] parts = fullJid.split("/");
145 Conversation conversation = service.findOrCreateConversation(account, parts[0],false);
146 return new Message(conversation,fullJid, message.findChild("body").getContent(), Message.ENCRYPTION_NONE,status);
147 }
148
149 public static void parseError(MessagePacket packet, Account account, XmppConnectionService service) {
150 String[] fromParts = packet.getFrom().split("/");
151 service.markMessage(account, fromParts[0], packet.getId(), Message.STATUS_SEND_FAILED);
152 }
153
154 public static String getPgpBody(MessagePacket packet) {
155 for(Element child : packet.getChildren()) {
156 if (child.getName().equals("x")&&child.getAttribute("xmlns").equals("jabber:x:encrypted")) {
157 return child.getContent();
158 }
159 }
160 return null;
161 }
162}