/*
* 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.in;

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

import edu.tsinghua.lumaqq.qq.PacketParseException;
import edu.tsinghua.lumaqq.qq.beans.QQFriend;
import edu.tsinghua.lumaqq.qq.packets.InPacket;


/**
 * <pre>
 * 請求好友列表的應答包，格式為
 * 1. 頭部
 * 2. 好友列表開始位置，這個位置是你所有好友排序后的位置，如果為0xFFFF，那就是你的好友已經全部得到了
 *    每次都固定的返回50個好友，所以如果不足50個了，那么這個值一定是0xFFFF了
 * 3. 好友QQ號，4字節
 * 4. 1字節，如果好友就是自己，為0xFF，否則為0x00
 * 5. 頭像，1字節
 * 6. 年齡，1字節
 * 7. 性別，1字節
 * 8. 昵稱長度，1字節
 * 9. 昵稱，不定字節，由8指定
 * 10. 2個未知字節
 * 11. 1字節擴展標志，bit1表示是否有QQ Show，其他未知
 * 12. 1字節通用標志
 *     bit1 => 會員
 *     bit4 => TCP方式登陸
 *     bit5 => 開發移動QQ
 *     bit6 => 綁定到手機
 * 	   bit7 => 是否有攝像頭
 * 13. 重復3到12的結構
 * 14.尾部
 * </pre>
 *
 * @author 馬若劼
 */
public class GetFriendListReplyPacket extends InPacket {
    public char position;
    public List friends;
    
    /**
     * 構造函數
     * @param buf 緩沖區
     * @param length 包長度
     * @throws PacketParseException 解析錯誤
     */
    public GetFriendListReplyPacket(ByteBuffer buf, int length) throws PacketParseException {
        super(buf, length);
    }

    /* (non-Javadoc)
     * @see edu.tsinghua.lumaqq.qq.packets.InPacket#parseBody(java.nio.ByteBuffer)
     */
    protected void parseBody(ByteBuffer buf) throws PacketParseException {
	    // 當前好友列表位置
		position = buf.getChar();
        // 只要還有數據就繼續讀取下一個friend結構
        friends = new ArrayList();
        while(buf.hasRemaining()) {
            QQFriend friend = new QQFriend();
            friend.readBean(buf);
            
            // 添加到list
            friends.add(friend);
        }
    }
}