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 boolean properlyAddressed = (packet.getTo().split("/").length == 2) || (account.countPresences() == 1);
35 String[] fromParts = packet.getFrom().split("/");
36 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
37 String body = packet.getBody();
38 if (!conversation.hasValidOtrSession()) {
39 if (properlyAddressed) {
40 conversation.startOtrSession(service.getApplicationContext(), fromParts[1]);
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 conversation.startOtrSession(service.getApplicationContext(), fromParts[1]);
51 } else {
52 return null;
53 }
54 }
55 }
56 try {
57 Session otrSession = conversation.getOtrSession();
58 SessionStatus before = otrSession
59 .getSessionStatus();
60 body = otrSession.transformReceiving(body);
61 SessionStatus after = otrSession.getSessionStatus();
62 if ((before != after)
63 && (after == SessionStatus.ENCRYPTED)) {
64 Log.d(LOGTAG, "otr session etablished");
65 List<Message> messages = conversation
66 .getMessages();
67 for (int i = 0; i < messages.size(); ++i) {
68 Message msg = messages.get(i);
69 if ((msg.getStatus() == Message.STATUS_UNSEND)
70 && (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
71 MessagePacket outPacket = service.prepareMessagePacket(
72 account, msg, otrSession);
73 msg.setStatus(Message.STATUS_SEND);
74 service.databaseBackend.updateMessage(msg);
75 account.getXmppConnection()
76 .sendMessagePacket(outPacket);
77 }
78 }
79 if (service.convChangedListener!=null) {
80 service.convChangedListener.onConversationListChanged();
81 }
82 } else if ((before != after) && (after == SessionStatus.FINISHED)) {
83 conversation.resetOtrSession();
84 Log.d(LOGTAG,"otr session stoped");
85 }
86 } catch (Exception e) {
87 conversation.resetOtrSession();
88 return null;
89 }
90
91 //isEmpty is a work around for some weird clients which send emtpty strings over otr
92 if ((body == null)||(body.isEmpty())) {
93 return null;
94 }
95 return new Message(conversation, packet.getFrom(), body, Message.ENCRYPTION_OTR,Message.STATUS_RECIEVED);
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 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 Message parseError(MessagePacket packet, Account account, XmppConnectionService service) {
150
151 String[] fromParts = packet.getFrom().split("/");
152 Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
153 Element error = packet.findChild("error");
154 String errorName = error.getChildren().get(0).getName();
155 String displayError;
156 if (errorName.equals("service-unavailable")) {
157 displayError = "Contact is offline and does not have offline storage";
158 } else {
159 displayError = errorName.replace("-", " ");
160 }
161 return new Message(conversation, packet.getFrom(), displayError, Message.ENCRYPTION_NONE, Message.STATUS_ERROR);
162 }
163
164 public static String getPgpBody(MessagePacket packet) {
165 for(Element child : packet.getChildren()) {
166 if (child.getName().equals("x")&&child.getAttribute("xmlns").equals("jabber:x:encrypted")) {
167 return child.getContent();
168 }
169 }
170 return null;
171 }
172}