using System.Collections.Generic;

public class MsgHandler
{

    public delegate void DelMsgHandler(ModelData msg);

    private static Dictionary<string, DelMsgHandler> mDicMsgs = new Dictionary<string, DelMsgHandler>();


    /// <summary>
    /// 添加监听者
    /// </summary>
    /// <param name="msgType"></param>
    /// <param name="handler"></param>
    public static void AddListener(string msgType, DelMsgHandler handler)
    {
        //判空
        if (mDicMsgs == null) mDicMsgs = new Dictionary<string, DelMsgHandler>();
        if (!mDicMsgs.ContainsKey(msgType)) mDicMsgs.Add(msgType, null);
        //增加监听
        mDicMsgs[msgType] += handler;

    }
    /// <summary>
    /// 去除对参数handler的监听
    /// </summary>
    /// <param name="msgType">消息类型</param>
    /// <param name="handler">被监听方法</param>
    public static void RemoveListener(string msgType, DelMsgHandler handler)
    {
        if (mDicMsgs != null && mDicMsgs.ContainsKey(msgType)) mDicMsgs[msgType] -= handler;
    }

    /// <summary>
    /// 清除所有的监听者
    /// </summary>
    public static void ClearAllListeners()
    {
        if (mDicMsgs != null) mDicMsgs.Clear();
    }

    /// <summary>
    /// 分发消息
    /// </summary>
    /// <param name="msgType">消息类型</param>
    /// <param name="msg">分发的内容</param>
    public static void SendMsg(string msgType, ModelData msg)
    {
        DelMsgHandler handler;

        if (mDicMsgs != null && mDicMsgs.TryGetValue(msgType, out handler))
        {

            if (handler != null)
                handler(msg);
        }
    }

    /// <summary>
    /// 群发消息
    /// </summary>
    /// <param name="msg">消息内容</param>
    public static void AllSendMsg(ModelData msg)
    {
        foreach (var item in mDicMsgs)
        {
            item.Value(msg);
        }
    }
}

public class Msg
{
    public string Key { get; private set; }
    public object Value { get; private set; }
    public Msg(string key, object value)
    {
        this.Key = key;
        this.Value = value;
    }
}