?/*
 * 名稱: 基于UDP廣播的小型聊天室
 * 作者: kingthy
 * MSN : kingthy@gmail.com
 * 博客: http://kingthy.cnblogs.com
 * 說明: 你可以對代碼進行任意的修改.如果你對程序進行了功能擴充,希望您能發一份新代碼給我.謝謝:)
 * 
 * */

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Sockets;
using Kingthy.UDPChatRoom.Service.Message;
namespace Kingthy.UDPChatRoom.Service
{
    /// <summary>
    /// 聊天的客戶端,用于發送消息
    /// </summary>
    public class ChatClient
        : IDisposable
    {
        /// <summary>
        /// 
        /// </summary>
        public ChatClient()
        {
            this.Client = new UdpClient();
        }
        /// <summary>
        /// UdpClient
        /// </summary>
        private UdpClient Client;

        #region 消息發送
        /// <summary>
        /// 發送查詢用戶在線的消息
        /// </summary>
        public void Query()
        {
            this.SendMessage(new QueryMessagePackage());
        }

        /// <summary>
        /// 發送表明用戶身份的消息
        /// </summary>
        public void SendIdentity()
        {
            this.SendMessage(new IdentityMessagePackage());
        }
        /// <summary>
        /// 發送用戶上線的消息
        /// </summary>
        public void Online()
        {
            this.SendMessage(new OnlineMessagePackage());
        }
        /// <summary>
        /// 發送用戶下線的消息
        /// </summary>
        public void Offline()
        {
            this.SendMessage(new OfflineMessagePackage());
        }
        /// <summary>
        /// 發送消息廣播
        /// </summary>
        /// <param name="message"></param>
        public void SendMessage(string message)
        {
            this.SendMessage(new ChatMessagePackage(DateTime.Now, message));
        }
        /// <summary>
        /// 發送消息廣播
        /// </summary>
        /// <param name="message"></param>
        /// <returns></returns>
        private void SendMessage(MessagePackageBase message)
        {
            byte[] data = message.GetPackageData();
            this.Client.Send(data, data.Length, ChatClient.ServerAddress);
        }
        #endregion

        /// <summary>
        /// 服務器的地址
        /// </summary>
        private readonly static IPEndPoint ServerAddress = new IPEndPoint(ChatServer.BroadcastAddress, ChatServer.Port);

        #region IDisposable 成員
        /// <summary>
        /// 釋放內存
        /// </summary>
        public void Dispose()
        {
            this.Client.Close();
            this.Client = null;
        }

        #endregion
    }
}