/***************************************************************************
* Copyright 2006-2016 by Christian Ihle *
* contact@kouchat.net *
* *
* This file is part of KouChat. *
* *
* KouChat is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation, either version 3 of *
* the License, or (at your option) any later version. *
* *
* KouChat is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with KouChat. *
* If not, see <http://www.gnu.org/licenses/>. *
***************************************************************************/
package net.usikkert.kouchat.net;
import static net.usikkert.kouchat.net.NetworkMessageType.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import net.usikkert.kouchat.event.ReceiverListener;
import net.usikkert.kouchat.misc.User;
import net.usikkert.kouchat.settings.Settings;
import net.usikkert.kouchat.util.Validate;
/**
* This class listens for multicast messages from the network,
* and parses them into a format the {@link MessageResponder} can use.
*
* <p>The supported message types:</p>
*
* <ul>
* <li>MSG</li>
* <li>LOGON</li>
* <li>EXPOSING</li>
* <li>LOGOFF</li>
* <li>AWAY</li>
* <li>BACK</li>
* <li>EXPOSE</li>
* <li>NICKCRASH</li>
* <li>WRITING</li>
* <li>STOPPEDWRITING</li>
* <li>GETTOPIC</li>
* <li>TOPIC</li>
* <li>NICK</li>
* <li>IDLE</li>
* <li>SENDFILEACCEPT</li>
* <li>SENDFILEABORT</li>
* <li>SENDFILE</li>
* <li>CLIENT</li>
* </ul>
*
* @author Christian Ihle
*/
public class MessageParser implements ReceiverListener {
/** The logger. */
private static final Logger LOG = Logger.getLogger(MessageParser.class.getName());
/** To handle the different kind of messages parsed here. */
private final MessageResponder responder;
/** The application settings. */
private final Settings settings;
/** If logged on to the chat or not. */
private boolean loggedOn;
/**
* Constructor.
*
* @param responder To handle the different kind of messages parsed here.
* @param settings The settings to use.
*/
public MessageParser(final MessageResponder responder, final Settings settings) {
Validate.notNull(responder, "MessageResponder can not be null");
Validate.notNull(settings, "Settings can not be null");
this.responder = responder;
this.settings = settings;
}
/**
* The parser. Checks what kind of message it is,
* and then gives the correct data to the responder for
* more processing.
*
* @param message The raw message to parse.
* @param ipAddress The IP address of the user who sent the message.
*/
@Override
public void messageArrived(final String message, final String ipAddress) {
try {
final int exclamation = message.indexOf("!");
final int hash = message.indexOf("#");
final int colon = message.indexOf(":");
final int msgCode = Integer.parseInt(message.substring(0, exclamation));
final String type = message.substring(exclamation + 1, hash);
final String msgNick = message.substring(hash + 1, colon);
final String msg = message.substring(colon + 1, message.length());
final User tempme = settings.getMe();
if (msgCode != tempme.getCode() && loggedOn) {
if (type.equals(MSG)) {
final int leftBracket = msg.indexOf("[");
final int rightBracket = msg.indexOf("]");
final int rgb = Integer.parseInt(msg.substring(leftBracket + 1, rightBracket));
responder.messageArrived(msgCode, msg.substring(rightBracket + 1, msg.length()), rgb);
}
else if (type.equals(LOGON)) {
final User newUser = new User(msgNick, msgCode);
newUser.setIpAddress(ipAddress);
newUser.setLastIdle(System.currentTimeMillis());
newUser.setLogonTime(System.currentTimeMillis());
responder.userLogOn(newUser);
}
else if (type.equals(EXPOSING)) {
final User user = new User(msgNick, msgCode);
user.setIpAddress(ipAddress);
user.setAwayMsg(msg);
if (msg.length() > 0) {
user.setAway(true);
}
user.setLastIdle(System.currentTimeMillis());
user.setLogonTime(System.currentTimeMillis());
responder.userExposing(user);
}
else if (type.equals(LOGOFF)) {
responder.userLogOff(msgCode);
}
else if (type.equals(AWAY)) {
responder.awayChanged(msgCode, true, msg);
}
else if (type.equals(BACK)) {
responder.awayChanged(msgCode, false, "");
}
else if (type.equals(EXPOSE)) {
responder.exposeRequested();
}
else if (type.equals(NICKCRASH)) {
if (tempme.getNick().equals(msg)) {
responder.nickCrash();
}
}
else if (type.equals(WRITING)) {
responder.writingChanged(msgCode, true);
}
else if (type.equals(STOPPEDWRITING)) {
responder.writingChanged(msgCode, false);
}
else if (type.equals(GETTOPIC)) {
responder.topicRequested();
}
else if (type.equals(TOPIC)) {
final int leftBracket = msg.indexOf("[");
final int rightBracket = msg.indexOf("]");
final int leftPara = msg.indexOf("(");
final int rightPara = msg.indexOf(")");
if (rightBracket != -1 && leftBracket != -1) {
final String theNick = msg.substring(leftPara + 1, rightPara);
final long theTime = Long.parseLong(msg.substring(leftBracket + 1, rightBracket));
String theTopic = null;
if (msg.length() > rightBracket + 1) {
theTopic = msg.substring(rightBracket + 1, msg.length());
}
responder.topicChanged(msgCode, theTopic, theNick, theTime);
}
}
else if (type.equals(NICK)) {
responder.nickChanged(msgCode, msgNick);
}
else if (type.equals(IDLE)) {
responder.userIdle(msgCode, ipAddress);
}
else if (type.equals(SENDFILEACCEPT)) {
final int leftPara = msg.indexOf("(");
final int rightPara = msg.indexOf(")");
final int fileCode = Integer.parseInt(msg.substring(leftPara + 1, rightPara));
if (fileCode == tempme.getCode()) {
final int leftCurly = msg.indexOf("{");
final int rightCurly = msg.indexOf("}");
final int leftBracket = msg.indexOf("[");
final int rightBracket = msg.indexOf("]");
final int port = Integer.parseInt(msg.substring(leftBracket + 1, rightBracket));
final int fileHash = Integer.parseInt(msg.substring(leftCurly + 1, rightCurly));
final String fileName = msg.substring(rightCurly + 1, msg.length());
responder.fileSendAccepted(msgCode, fileName, fileHash, port);
}
}
else if (type.equals(SENDFILEABORT)) {
final int leftPara = msg.indexOf("(");
final int rightPara = msg.indexOf(")");
final int fileCode = Integer.parseInt(msg.substring(leftPara + 1, rightPara));
if (fileCode == tempme.getCode()) {
final int leftCurly = msg.indexOf("{");
final int rightCurly = msg.indexOf("}");
final String fileName = msg.substring(rightCurly + 1, msg.length());
final int fileHash = Integer.parseInt(msg.substring(leftCurly + 1, rightCurly));
responder.fileSendAborted(msgCode, fileName, fileHash);
}
}
else if (type.equals(SENDFILE)) {
final int leftPara = msg.indexOf("(");
final int rightPara = msg.indexOf(")");
final int fileCode = Integer.parseInt(msg.substring(leftPara + 1, rightPara));
if (fileCode == tempme.getCode()) {
final int leftCurly = msg.indexOf("{");
final int rightCurly = msg.indexOf("}");
final int leftBracket = msg.indexOf("[");
final int rightBracket = msg.indexOf("]");
final long byteSize = Long.parseLong(msg.substring(leftBracket + 1, rightBracket));
final String fileName = msg.substring(rightCurly + 1, msg.length());
final int fileHash = Integer.parseInt(msg.substring(leftCurly + 1, rightCurly));
responder.fileSend(msgCode, byteSize, fileName, msgNick, fileHash);
}
}
else if (type.equals(CLIENT)) {
final int leftPara = msg.indexOf("(");
final int rightPara = msg.indexOf(")");
final int leftBracket = msg.indexOf("[");
final int rightBracket = msg.indexOf("]");
final int leftCurly = msg.indexOf("{");
final int rightCurly = msg.indexOf("}");
final int lessThan = msg.indexOf("<");
final int greaterThan = msg.indexOf(">");
final String client = msg.substring(leftPara + 1, rightPara);
final long timeSinceLogon = Long.parseLong(msg.substring(leftBracket + 1, rightBracket));
final String operatingSystem = msg.substring(leftCurly + 1, rightCurly);
int privateChatPort = 0;
try {
privateChatPort = Integer.parseInt(msg.substring(lessThan + 1, greaterThan));
}
catch (final NumberFormatException e) {
LOG.log(Level.WARNING, "Failed to parse private chat port. message=" + message + ", ipAddress=" + ipAddress, e);
}
responder.clientInfo(msgCode, client, timeSinceLogon, operatingSystem, privateChatPort);
}
}
else if (msgCode == tempme.getCode() && type.equals(LOGON)) {
responder.meLogOn(ipAddress);
loggedOn = true;
}
else if (msgCode == tempme.getCode() && type.equals(IDLE) && loggedOn) {
responder.meIdle(ipAddress);
}
}
// Just ignore, someone sent a badly formatted message
catch (final StringIndexOutOfBoundsException e) {
LOG.log(Level.SEVERE, "Failed to parse message. message=" + message + ", ipAddress=" + ipAddress, e);
}
// Just ignore, someone sent a badly formatted message
catch (final NumberFormatException e) {
LOG.log(Level.SEVERE, "Failed to parse message. message=" + message + ", ipAddress=" + ipAddress, e);
}
}
}