/*
* LumaQQ - Java QQ Client
*
* Copyright (C) 2004 luma <stubma@163.com>
*
* 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
*/
package edu.tsinghua.lumaqq.qq.packets.out;

import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import edu.tsinghua.lumaqq.qq.PacketParseException;
import edu.tsinghua.lumaqq.qq.QQ;

/**
 * <pre>
 * 得到群中成員信息的請求包，格式為：
 * 1. 頭部
 * 2. 命令類型，得到成員信息是0x0C
 * 3. 群內部ID，4字節
 * 4. 需要得到信息的成員QQ號，4字節
 * 5. 如果要得到多個成員的信息，重復4部分
 * 6. 尾部
 * 
 * 注意：一次最多只能得到61個成員信息，而實際操作中我們按照30個一組來得到
 * </pre>
 * 
 * @author 馬若劼
 */
public class ClusterGetMemberInfoPacket extends ClusterCommandPacket {
	private List members;
	
	/**
	 * 構造函數
	 */
	public ClusterGetMemberInfoPacket() {
		super();
		subCommand = QQ.QQ_CLUSTER_CMD_GET_MEMBER_INFO;
		members = new ArrayList();		
	}

    /**
     * @param buf
     * @param length
     * @throws PacketParseException
     */
    public ClusterGetMemberInfoPacket(ByteBuffer buf, int length)
            throws PacketParseException {
        super(buf, length);
    }
    
    /* (non-Javadoc)
     * @see edu.tsinghua.lumaqq.qq.packets.OutPacket#putBody(java.nio.ByteBuffer)
     */
    protected void putBody(ByteBuffer buf) {
		// 命令類型
		buf.put(subCommand);
		// 內部ID
		buf.putInt(clusterId);
		// 需要得到信息的成員QQ號列表
		Iterator iter = members.iterator();
		while(iter.hasNext())
			buf.putInt(((Integer)iter.next()).intValue());
    }
    
    /* (non-Javadoc)
     * @see edu.tsinghua.lumaqq.qq.packets.OutPacket#parseBody(java.nio.ByteBuffer)
     */
    protected void parseBody(ByteBuffer buf) throws PacketParseException {
        subCommand = buf.get();
        clusterId = buf.getInt();
        while(buf.hasRemaining())
            members.add(new Integer(buf.getInt()));
    }
	
	/**
	 * 添加一個需要得到信息的成員QQ號
	 * @param qqNum
	 */
	public void addMember(int qqNum) {
		members.add(new Integer(qqNum));
	}
	
	/**
	 * 添加一個需要得到信息的成員QQ號
	 * @param qqNum
	 */
	public void addMember(Integer qqNum) {
		members.add(qqNum);
	}
	
	/**
	 * 一次添加多個成員
	 * @param m
	 */
	public void addMembers(int[] m) {
		for(int i = 0; i < m.length; i++)
			members.add(new Integer(m[i]));
	}
	
	/**
	 * 設置需要得到信息的成員列表
	 * @param members
	 */
	public void setMembers(List members) {
		this.members = members;
	}
	
	/**
	 * 得到指定位置的成員QQ號
	 * 
	 * @param index
	 * 			成員索引
	 * @return 成員QQ號
	 */
	public int getMember(int index) {
	    return ((Integer)members.get(index)).intValue();
	}
}