1 files changed, 166 insertions, 0 deletions
diff --git a/src/eu/siacs/conversations/parser/MessageParser.java b/src/eu/siacs/conversations/parser/MessageParser.java
new file mode 100644
index 00000000..26078073
--- /dev/null
+++ b/src/eu/siacs/conversations/parser/MessageParser.java
@@ -0,0 +1,166 @@
+package eu.siacs.conversations.parser;
+
+import java.util.List;
+
+import net.java.otr4j.session.Session;
+import net.java.otr4j.session.SessionStatus;
+import android.util.Log;
+import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.entities.Conversation;
+import eu.siacs.conversations.entities.Message;
+import eu.siacs.conversations.services.XmppConnectionService;
+import eu.siacs.conversations.xml.Element;
+import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
+
+public class MessageParser {
+	
+	protected static final String LOGTAG = "xmppService";
+	private XmppConnectionService mXmppConnectionService;
+	
+	public MessageParser(XmppConnectionService service) {
+		this.mXmppConnectionService = service;
+	}
+	
+	public Message parsePlainTextChat(MessagePacket packet, Account account) {
+		String[] fromParts = packet.getFrom().split("/");
+		Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, fromParts[0],false);
+		String body = packet.getBody();
+		return new Message(conversation, packet.getFrom(), body, Message.ENCRYPTION_NONE, Message.STATUS_RECIEVED);
+	}
+	
+	public Message parsePgpChat(String pgpBody, MessagePacket packet, Account account) {
+		String[] fromParts = packet.getFrom().split("/");
+		Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, fromParts[0],false);
+		return new Message(conversation, packet.getFrom(), pgpBody, Message.ENCRYPTION_PGP, Message.STATUS_RECIEVED);
+	}
+	
+	public Message parseOtrChat(MessagePacket packet, Account account) {
+		boolean properlyAddressed = (packet.getTo().split("/").length == 2) || (account.countPresences() == 1);
+		String[] fromParts = packet.getFrom().split("/");
+		Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, fromParts[0],false);
+		String body = packet.getBody();
+		if (!conversation.hasValidOtrSession()) {
+			if (properlyAddressed) {
+				Log.d("xmppService","starting new otr session with "+packet.getFrom()+" because no valid otr session has been found");
+				conversation.startOtrSession(mXmppConnectionService.getApplicationContext(), fromParts[1],false);
+			} else {
+				Log.d("xmppService",account.getJid()+": ignoring otr session with "+fromParts[0]);
+				return null;
+			}
+		} else {
+			String foreignPresence = conversation.getOtrSession().getSessionID().getUserID();
+			if (!foreignPresence.equals(fromParts[1])) {
+				conversation.resetOtrSession();
+				if (properlyAddressed) {
+					Log.d("xmppService","replacing otr session with "+packet.getFrom());
+					conversation.startOtrSession(mXmppConnectionService.getApplicationContext(), fromParts[1],false);
+				} else {
+					return null;
+				}
+			}
+		}
+		try {
+			Session otrSession = conversation.getOtrSession();
+			SessionStatus before = otrSession
+					.getSessionStatus();
+			body = otrSession.transformReceiving(body);
+			SessionStatus after = otrSession.getSessionStatus();
+			if ((before != after)
+					&& (after == SessionStatus.ENCRYPTED)) {
+				Log.d(LOGTAG, "otr session etablished");
+				List<Message> messages = conversation
+						.getMessages();
+				for (int i = 0; i < messages.size(); ++i) {
+					Message msg = messages.get(i);
+					if ((msg.getStatus() == Message.STATUS_UNSEND)
+							&& (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
+						MessagePacket outPacket = mXmppConnectionService.prepareMessagePacket(
+								account, msg, otrSession);
+						msg.setStatus(Message.STATUS_SEND);
+						mXmppConnectionService.databaseBackend.updateMessage(msg);
+						account.getXmppConnection()
+								.sendMessagePacket(outPacket);
+					}
+				}
+				mXmppConnectionService.updateUi(conversation, false);
+			} else if ((before != after) && (after == SessionStatus.FINISHED)) {
+				conversation.resetOtrSession();
+				Log.d(LOGTAG,"otr session stoped");
+			}
+			//isEmpty is a work around for some weird clients which send emtpty strings over otr
+			if ((body == null)||(body.isEmpty())) {
+				return null;
+			}
+			return new Message(conversation, packet.getFrom(), body, Message.ENCRYPTION_OTR,Message.STATUS_RECIEVED);
+		} catch (Exception e) {
+			conversation.resetOtrSession();
+			return null;
+		}
+	}
+	
+	public Message parseGroupchat(MessagePacket packet, Account account) {
+		int status;
+		String[] fromParts = packet.getFrom().split("/");
+		Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, fromParts[0],true);
+		if (packet.hasChild("subject")) {
+			conversation.getMucOptions().setSubject(packet.findChild("subject").getContent());
+			mXmppConnectionService.updateUi(conversation, false);
+			return null;
+		}
+		if ((fromParts.length == 1)) {
+			return null;
+		}
+		String counterPart = fromParts[1];
+		if (counterPart.equals(conversation.getMucOptions().getNick())) {
+			status = Message.STATUS_SEND;
+		} else {
+			status = Message.STATUS_RECIEVED;
+		}
+		return new Message(conversation, counterPart, packet.getBody(), Message.ENCRYPTION_NONE, status);
+	}
+
+	public Message parseCarbonMessage(MessagePacket packet,Account account) {
+		int status;
+		String fullJid;
+		Element forwarded;
+		if (packet.hasChild("received")) {
+			forwarded = packet.findChild("received").findChild(
+					"forwarded");
+			status = Message.STATUS_RECIEVED;
+		} else if (packet.hasChild("sent")) {
+			forwarded = packet.findChild("sent").findChild(
+					"forwarded");
+			status = Message.STATUS_SEND;
+		} else {
+			return null;
+		}
+		if (forwarded==null) {
+			return null;
+		}
+		Element message = forwarded.findChild("message");
+		if ((message == null) || (!message.hasChild("body")))
+			return null; // either malformed or boring
+		if (status == Message.STATUS_RECIEVED) {
+			fullJid = message.getAttribute("from");
+		} else {
+			fullJid = message.getAttribute("to");
+		}
+		String[] parts = fullJid.split("/");
+		Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, parts[0],false);
+		return new Message(conversation,fullJid, message.findChild("body").getContent(), Message.ENCRYPTION_NONE,status);
+	}
+
+	public void parseError(MessagePacket packet, Account account) {
+		String[] fromParts = packet.getFrom().split("/");
+		mXmppConnectionService.markMessage(account, fromParts[0], packet.getId(), Message.STATUS_SEND_FAILED);
+	}
+
+	public String getPgpBody(MessagePacket packet) {
+		for(Element child : packet.getChildren()) {
+			if (child.getName().equals("x")&&child.getAttribute("xmlns").equals("jabber:x:encrypted")) {
+				return child.getContent();
+			}
+		}
+		return null;
+	}
+}