using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Firebird2D.EventPipelines
{
    /// <summary>
    /// Interface for the Firebird event Pipeline
    /// </summary>
    public interface I_Pipeline
    {
        /// <summary>
        /// Class witch owns the Pipeline and has the right to send events or delete the pipeline
        /// </summary>
        object PipelineMaster { get; }
        /// <summary>
        /// Check if no one subscribed to the event
        /// </summary>
        bool IsEventEmpty { get; }
        /// <summary>
        /// Subscribe to this event Pipeline
        /// </summary>
        /// <param name="handler">Handler witch should be Invoked when the event is send</param>
        void Subscribe(Delegate handler);

        /// <summary>
        /// Unsubscribe from this event Pipeline
        /// </summary>
        /// <param name="handler">Handler witch should be removed from the Pipeline</param>
        void Unsubscribe(Delegate handler);

    }
}