Scriptum/Assets/Scripts/Chest/ChestPanelController.cs

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

public class ChestPanelController : MonoBehaviour
{
    [Header("Inventory Information")]
    [SerializeField] private GameObject blankChestSlot;
    [SerializeField] private GameObject chestPanel;
    [SerializeField] private Button chestPanelCloseButton;

    [SerializeField] private GameObject chest;  // chest to which the panel belongs

    [SerializeField] public const int MAX_SLOT_CUNT = 6*8;

    public List<InventorySlot> content = new List<InventorySlot>();

    void Awake()
    {
        InitInventorySlots();
    }

    // Start is called before the first frame update
    void Start()
    {
        if(chestPanelCloseButton)
        {
            chestPanelCloseButton.onClick.AddListener(CloseOnClick);
        }
    }

    // Update is called once per frame
    void Update()
    {
    }

    void CloseOnClick()
    {
        Destroy(gameObject);  // destroy panel

        if(chest)
        {
            chest.GetComponent<Chest>().CloseChest();
        }
    }

    void InitInventorySlots()
    {
        if(chestPanel)
        {
            for(int i = 0; i < MAX_SLOT_CUNT; i++)
            {
                InventorySlot newSlot = Instantiate(blankChestSlot, chestPanel.transform.position, Quaternion.identity).GetComponent<InventorySlot>();
                newSlot.transform.SetParent(chestPanel.transform);
                newSlot.SetupInventorySlot(null, this);

                content.Add(newSlot);
            } 
        }
    }

    public void SetupChest(GameObject _chest, List<Item> _chestItems)
    {
        chest = _chest;

        SetPanelItems(_chestItems);
    }

    private void SetPanelItems(List<Item> _itemsList)
    {        
        for(int i=0; i < _itemsList.Count; i++)
        {
            content[i].SetItem(_itemsList[i]);
        }
    }
}