TriggerLayersActions

using System.Collections;
using System.Collections.Generic;

using UnityEngine;
using UnityEngine.Events;

namespace GameCore
{
    [RequireComponent (typeof (Collider))]
    public class TriggerLayersActions : MonoBehaviour
    {
        private Collider _collider = null;
        public new Collider collider { get { if (_collider == null) _collider = GetComponent<Collider> (); return _collider; } }
        private void Awake () { collider.isTrigger = true; }

        [SerializeField] List<LayersAction> OnEnterTrigger;
        [SerializeField] List<LayersAction> OnExitTrigger;
        public void AddOnEnterAction (LayerMask layermask, UnityEventGameObject action)
        {
            OnEnterTrigger.Add (new LayersAction () { layermask = layermask, action = action });
        }
        public void AddOnExitAction (LayerMask layermask, UnityAction<GameObject> action)
        {
            var LayersAction = OnExitTrigger.Find (ta => ta.layermask == layermask);
            if (LayersAction == null) return;
            LayersAction.action.AddListener (action);
        }

        private void OnTriggerEnter (Collider other)
        {
            foreach (var trigger in OnEnterTrigger)
                trigger.Invoke (other.gameObject);
        }

        private void OnTriggerExit (Collider other)
        {
            foreach (var trigger in OnExitTrigger)
                trigger.Invoke (other.gameObject);
        }
    }

    [System.Serializable]
    public class LayersAction
    {
        public LayerMask layermask;
        public UnityEventGameObject action;
        public void Invoke (GameObject go)
        {
            if (layermask == (layermask | (1 << go.layer)))
            {
                action.Invoke (go);
            }
        }
    }
}