PoolManager

/*
==========================
Copyright (c) Diliupg 2020
   www.soft.diliupg.com
==========================
*/

using UnityEngine;
using System.Collections.Generic;

public class PoolManager : MonoBehaviour
{
    //float scaleAmount = 1f;

    [System.Serializable]
    public class Pool
    {
        public int tag;
        public GameObject prefab;
        public int size;
    }

    public List<Pool> Pools;
    private Pool pool;
    public Dictionary<int, Queue<GameObject>> PoolDictionary;

    void Start ( )
    {
        Init ( );
    }

    void Init ( )
    {
        PoolDictionary = new Dictionary<int, Queue<GameObject>> ( );

        foreach ( Pool pool in Pools )
        {
            Queue<GameObject> objectPool = new Queue<GameObject> ( );

            for ( int i = 0 ; i < pool.size ; i++ )
            {
                GameObject obj = Instantiate ( pool.prefab );

                obj.SetActive ( false );
                objectPool.Enqueue ( obj ); // add to the queue
            }

            PoolDictionary.Add ( pool.tag, objectPool );
        }
    }

    public GameObject SpawnFromPool ( int tag, Vector2 position )
    {
        if ( !PoolDictionary.ContainsKey ( tag ) )
        {
            //Debug.LogWarning ( "Pool with tag " + tag + "doesn't exist" );
            return null;
        }

        GameObject objectToSpawn = PoolDictionary [ tag ].Dequeue ( ); // remove from the queue

        objectToSpawn.SetActive ( true );
        objectToSpawn.transform.position = position;

        PoolDictionary [ tag ].Enqueue ( objectToSpawn ); // put back in the queue

        return objectToSpawn;
    }
}