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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Tango.Core.DI
{
/// <summary>
/// Represents the Tango messenger service.
/// </summary>
public class TangoMessenger
{
private class MessageHandler
{
public Type Type { get; set; }
public Action<object> Handler { get; set; }
public MessageHandler(Type type, Action<object> handler)
{
Type = type;
Handler = handler;
}
}
private List<MessageHandler> _messageHandlers;
private static TangoMessenger _default;
/// <summary>
/// Gets the default messenger instance.
/// </summary>
public static TangoMessenger Default
{
get
{
if (_default == null)
{
_default = new TangoMessenger();
}
return _default;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="TangoMessenger"/> class.
/// </summary>
public TangoMessenger()
{
_messageHandlers = new List<MessageHandler>();
}
/// <summary>
/// Registers the specified message handler.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="handler">The handler.</param>
public void Register<T>(Action<T> handler)
{
_messageHandlers.Add(new MessageHandler(typeof(T), (x) => handler((T)x)));
}
/// <summary>
/// Sends the specified message.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="message">The message.</param>
public void Send<T>(T message)
{
foreach (var handler in _messageHandlers.Where(x => x.Type == typeof(T)))
{
handler.Handler(message);
}
}
}
}
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