cmdlistonlinefriends.java

使用工具jublider开发的一个聊天室实现基本功能,

/**
 * Copyright (C) 2003  Manfred Andres
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 * 
 * Created on 28.09.2003
 */

package freecs.commands;
import java.util.Enumeration;
import java.util.Vector;

import freecs.interfaces.ICommand;
import freecs.core.User;
import freecs.core.UserManager;
import freecs.content.MessageState;

/**
 * @author Manfred Andres
 *
 * freecs.commands
 */
public class CmdListOnlineFriends extends AbstractCommand {
	public final String cmd= "/f";
	private static final ICommand selve=new CmdListOnlineFriends();

	private CmdListOnlineFriends () { }
	
	public static ICommand getInstance () {
		return selve;
	}
	
    public boolean execute (MessageState msgState, String param) {
        if (msgState.sender.numberOfFriends () < 1) {
            msgState.msgTemplate = "error.fl.nofriends";
            msgState.sender.sendMessage (msgState.mp);
            return false;
        }
        Vector onlineFriends = new Vector();
        for (Enumeration e = msgState.sender.friends (); e.hasMoreElements (); ) {
            String uname = (String) e.nextElement ();
            msgState.usercontext = UserManager.mgr.getUserByName (uname);
            if (msgState.usercontext==null)
                continue;
            onlineFriends.add(msgState.usercontext);
        }
        if (onlineFriends.size() < 1) {
            msgState.msgTemplate="error.f.noFriendOnline";
            msgState.sender.sendMessage (msgState.mp);
            return false;
        }
		msgState.msgTemplate = "message.f.headline";
        msgState.param = String.valueOf(onlineFriends.size());
		msgState.sender.sendMessage (msgState.mp);
        
        msgState.useRenderCache = false;
		msgState.msgTemplate = "message.f";
        for (Enumeration e = onlineFriends.elements(); e.hasMoreElements(); ) {
            msgState.usercontext = (User) e.nextElement();
            msgState.sender.sendMessage(msgState.mp);
        }
        msgState.msgTemplate = "message.f.count";
        msgState.sender.sendMessage(msgState.mp);
		return true;
	}
}