Unity_CoroutineExtensions.css

using System.Collections;
using UnityEngine;
using UnityEngine.Events;

namespace _MyScripts.Utils
{
    public static class CoroutineExtensions
    {
        public static IEnumerator PostCoroutine(this MonoBehaviour mono, IEnumerator coroutine)
        {
            mono.StartCoroutine(coroutine);
            return coroutine;
        }

        public static IEnumerator PostDelayed(this MonoBehaviour mono, UnityAction action, float delay)
        {
            var x = ExecuteAction(delay, null, action);
            mono.StartCoroutine(x);
            return x;
        }

        public static IEnumerator PostDelayed(this MonoBehaviour mono, UnityAction actionPre, UnityAction actionPost,
            float delay)
        {
            var x = ExecuteAction(delay, actionPre, actionPost);
            mono.StartCoroutine(x);
            return x;
        }

        private static IEnumerator ExecuteAction(float delay, UnityAction actionPre, UnityAction actionPost)
        {
            actionPre?.Invoke();
            yield return new WaitForSecondsRealtime(delay);
            actionPost.Invoke();
        }

        private static IEnumerator ExecuteAction(UnityAction action)
        {
            action?.Invoke();
            yield return null;
        }

        public static void StopPostDelayed(this MonoBehaviour mono, IEnumerator x)
        {
            mono.StopCoroutine(x);
        }
    }
}