GameEvent

using System.Collections.Generic;
using UnityEngine;

[CreateAssetMenu]
public class GameEvent : ScriptableObject
{
    [SerializeField]
    List<EventListener> eventListeners = new List<EventListener> ();

    public void Raise ()
    {
        for (int i = eventListeners.Count - 1; i >= 0; i--)
            eventListeners[i].OnEventRaised ();
    }

    public virtual void RegisterListener (EventListener listener)
    {
        if (!eventListeners.Contains (listener))
            eventListeners.Add (listener);
    }

    public virtual void UnRegisterListener (EventListener listener)
    {
        if (eventListeners.Contains (listener))
            eventListeners.Remove (listener);
    }
}