DMDirc-Client/src/com/dmdirc/addons/dcc/DCCChat.java

/*
 * Copyright (c) 2006-2008 Chris Smith, Shane Mc Cormack, Gregory Holmes
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.dmdirc.addons.dcc;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;

/**
 * This class handles a DCC Chat
 *
 * @author Shane 'Dataforce' McCormack
 */
public class DCCChat extends DCC {
	/** The handler for this DCCChat. */
	private DCCChatInterface handler = null;
	/** Used to send data out the socket. */
	private PrintWriter out;
	/** Used to read data from the socket. */
	private BufferedReader in;
	
	
	/**
	 * Creates a new instance of DCCChat.
	 */
	public DCCChat() {
		super();
	}
	
	/**
	 * Change the handler for this DCC Chat.
	 *
	 * @param handler A class implementing DCCChatInterface
	 */
	public void setHandler(final DCCChatInterface handler) {
		this.handler = handler;
	}
	
	/**
	 * Called when the socket is first opened, before any data is handled.
	 */
	@Override
	protected void socketOpened() {
		try {
			out = new PrintWriter(socket.getOutputStream(), true);
			in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
			if (handler != null) {
				handler.socketOpened(this);
			}
		} catch (IOException ioe) { }
	}
	
	/**
	 * Called when the socket is closed, before the thread terminates.
	 */
	@Override
	protected void socketClosed() {
		out = null;
		in = null;
		if (handler != null) {
			handler.socketClosed(this);
		}
	}
	
	/**
	 * Handle the socket.
	 *
	 * @return false when socket is closed, true will cause the method to be
	 *         called again.
	 */
	@Override
	protected boolean handleSocket() {
		if (out == null || in == null) { return false; }
		final String inLine;
		try {
			inLine = in.readLine();
			if (inLine == null) {
				return false;
			} else {
				if (handler != null) {
					handler.handleChatMessage(this, inLine);
				}
				return true;
			}
		} catch (IOException e) {
			return false;
		}
	}
	
	/**
	 * Check if this socket can be written to.
	 */
	@Override
	public boolean isWriteable() {
		return out != null;
	}
	
	/**
	 * Send a line out the socket.
	 *
	 * @param line The line to be sent
	 */
	public void sendLine(final String line) {
		if (out != null) {
			out.printf("%s\r\n", line);
		}
	}
}