Unity Action Trigger

readme.md

Copy of: https://twitter.com/evil_arev/status/1503143398525571076

ActionTrigger.cs

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

public class ActionTrigger : MonoBehaviour
{
    public enum TriggerType
    {
        None,
        Start,
        KeyDown,
        KeyUp,
        ButtonDown,
        ButtonUp,
        TriggerEnter,
        TriggerExit,
        CollisionEnter,
        CollisionExit
    }

    public TriggerType Trigger;
    public float Delay;
    public KeyCode Key;
    public string Button;
    public string ColliderTag;

    public UnityEngine.Events.UnityEvent Action;

    void Start()
    {
        if (Trigger == TriggerType.Start)
        {
            ExecuteAction();
            enabled = false;
        }
        else if (!(Trigger == TriggerType.KeyDown || Trigger == TriggerType.KeyUp || Trigger == TriggerType.ButtonDown || Trigger == TriggerType.ButtonUp))
        {
            enabled = false;
        }
    }

    void Update()
    {
        if (Trigger == TriggerType.KeyDown && Input.GetKeyDown(Key))
        {
            ExecuteAction();
        }
        else if (Trigger == TriggerType.KeyUp && Input.GetKeyUp(Key))
        {
            ExecuteAction();
        }
        else if (Trigger == TriggerType.ButtonDown && Input.GetButtonDown(Button))
        {
            ExecuteAction();
        }
        else if (Trigger == TriggerType.ButtonUp && Input.GetButtonUp(Button))
        {
            ExecuteAction();
        }
    }

    public void ExecuteAction()
    {
        if (Delay > 0f)
        {
            StartCoroutine(DelayedAction());
        }
        else
        {
            Action.Invoke();
        }
    }

    IEnumerator DelayedAction()
    {
        yield return new WaitForSeconds(Delay);
        Action.Invoke();
    }

    private void OnTriggerEnter(Collider other)
    {
        if (Trigger == TriggerType.TriggerEnter)
        {
            if (string.IsNullOrEmpty(ColliderTag) || other.CompareTag(ColliderTag))
            {
                ExecuteAction();
            }
        }
    }

    private void OnTriggerExit(Collider other)
    {
        if (Trigger == TriggerType.TriggerExit)
        {
            if (string.IsNullOrEmpty(ColliderTag) || other.CompareTag(ColliderTag))
            {
                ExecuteAction();
            }
        }
    }

    private void OnCollisionEnter (Collision collision)
    {
        if (Trigger == TriggerType.CollisionEnter)
        {
            if (string.IsNullOrEmpty(ColliderTag) || collision.gameObject.CompareTag(ColliderTag))
            {
                ExecuteAction();
            }
        }
    }

    private void OnCollisionExit(Collision collision)
    {
        if (Trigger == TriggerType.CollisionExit)
        {
            if (string.IsNullOrEmpty(ColliderTag) || collision.gameObject.CompareTag(ColliderTag))
            {
                ExecuteAction();
            }
        }
    }
}