?/*
 * 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.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Net;
using Kingthy.UDPChatRoom.Service;
using Kingthy.UDPChatRoom.Service.Message;
namespace Kingthy.UDPChatRoom
{
    public partial class RoomForm : Form
    {
        public RoomForm()
        {
            //初始化聊天室數據
            this.Server = new ChatServer();
            this.Client = new ChatClient();

            this.Server.DataReceive += new EventHandler<ChatServerDataReceiveEventArgs>(Server_DataReceive);
            //啟動服務
            this.Server.Start();

            InitializeComponent();
            this.FormClosing += new FormClosingEventHandler(RoomForm_FormClosing);
            this.MessageText.KeyDown += new KeyEventHandler(MessageText_KeyDown);

            //登錄在線狀態
            this.Client.Online();
            //查詢用戶列表
            this.Client.Query();
        }

        #region 窗體事件
        /// <summary>
        /// 窗體關閉
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void RoomForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            //注銷
            this.Client.Offline();

            this.Server.Dispose();
            this.Client.Dispose();
        }
        /// <summary>
        /// 處理CTRL + Enter鍵
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void MessageText_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.Control && e.KeyCode == Keys.Enter)
            {
                BtnSend_Click(null, e);
                //不處理Enter鍵
                e.SuppressKeyPress = true;
            }
        }
        /// <summary>
        /// 發送聊天內容
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void BtnSend_Click(object sender, EventArgs e)
        {
            if (!string.IsNullOrEmpty(this.MessageText.Text))
                this.Client.SendMessage(this.MessageText.Text);
            this.MessageText.Text = string.Empty;
        }
        #endregion

        #region 屬性定義
        private ChatServer Server;
        /// <summary>
        /// 
        /// </summary>
        private ChatClient Client;
        #endregion

        #region 聊天服務
        /// <summary> 
        /// 聊天服務的數據接收
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Server_DataReceive(object sender, ChatServerDataReceiveEventArgs e)
        {
            switch (e.MessageType)
            {
                case MessageType.Query:
                    //查詢狀態,則發送自己的身份
                    this.Client.SendIdentity();
                    break;
                case MessageType.Identity:
                    //客戶端表明身份狀態,則加入到客戶端列表
                    AddClientIP(e.RemoteEP.Address.ToString());
                    break;
                case MessageType.Online:
                    //有某個客戶端上線,則加入到客戶端列表
                    AddClientIP(e.RemoteEP.Address.ToString());
                    AddMessage(string.Format("## 客戶機{0}已上線...", e.RemoteEP.Address.ToString()));
                    break;
                case MessageType.Offline:
                    //某個客戶端下線
                    RemoveClientIP(e.RemoteEP.Address.ToString());
                    AddMessage(string.Format("## 客戶機{0}已下線...", e.RemoteEP.Address.ToString()));
                    break;
                case MessageType.Chat:
                    //消息
                    ChatMessagePackage package = ChatMessagePackage.FromPackage(e.Data);
                    AddMessage(string.Format("--------------------------------------------------------------\r\n>> {0} 于 {1} 說:\r\n{2}\r\n", 
                        e.RemoteEP.Address.ToString(),
                        package.Time.ToString("yyyy-MM-dd HH:mm:ss"),
                        package.Message
                        ));
                    break;
            }
        }

        /// <summary>
        /// 單一參數的方法代理
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="e"></param>
        public delegate void DelegateDefinde<T>(T e);

        /// <summary>
        /// 添加IP到客戶列表
        /// </summary>
        /// <param name="e"></param>
        private void AddClientIP(string ip)
        {
            if (this.ClientList.InvokeRequired)
            {
                this.ClientList.Invoke(new DelegateDefinde<string>(AddClientIP), ip);
            }
            else
            {
                if (!this.ClientList.Items.Contains(ip))
                {
                    this.ClientList.Items.Add(ip);                    
                }
            }
        }
        /// <summary>
        /// 刪除某個客戶列表
        /// </summary>
        /// <param name="ip"></param>
        private void RemoveClientIP(string ip)
        {
            if (this.ClientList.InvokeRequired)
            {
                this.ClientList.Invoke(new DelegateDefinde<string>(RemoveClientIP), ip);
            }
            else
            {
                if (this.ClientList.Items.Contains(ip))
                {
                    this.ClientList.Items.Remove(ip);
                }
            }
        }
        /// <summary>
        /// 添加消息
        /// </summary>
        /// <param name="text"></param>
        private void AddMessage(string text)
        {
            if (this.MessageOutput.InvokeRequired)
            {
                this.MessageOutput.Invoke(new DelegateDefinde<string>(AddMessage), text);
            }
            else
            {
                if (this.MessageOutput.Text.Length > 0)
                {
                    this.MessageOutput.AppendText("\r\n");
                }
                this.MessageOutput.AppendText(text);
            }
        }
        #endregion
    }
}