Pong/Assets/Scripts/Game/Collectable.cs

using System.Collections;
using Unity.Netcode;
using UnityEngine;

namespace Game {
	public abstract class Collectable : NetworkBehaviour {

		private void OnTriggerEnter2D(Collider2D other) {
			var player = other.GetComponent<Ball>().LastContactPlayer;
			if (player != null) {
				Destroy(gameObject);
				OnCollect(player);
			}
		}

		private IEnumerator Start() {
			Setup();
			yield return new WaitForSeconds(Duration());
			Destroy(gameObject);
		}

		protected abstract void Setup();
		protected abstract float Duration();
		protected abstract void OnCollect(Player collector);
	}
}