FM/Assets/Scripts/Runtime/UI/Logic/ShoppingCartUI.cs

using System.Collections.Generic;
using Runtime;
using UnityEngine.UI;
using TMPro;
using UnityEngine;
using ZGame;

namespace HK
{
    public class ShoppingCartUI : UIBase
    {
        [SerializeField] private UpMenuItem goUpMenu;
        [SerializeField] private TMP_Text txtQuantity;
        [SerializeField] private TMP_Text txtSubtotal;
        [SerializeField] private TMP_Text txtDiscount;
        [SerializeField] private TMP_Text txtAmount;
        [SerializeField] private Button btnConfirm;
        [SerializeField] ScrollRect scrollRect;
        [SerializeField] GameObject commodityItem;
        List<CommodityItem> items = new List<CommodityItem>();

        public override void OnInit()
        {
            base.OnInit();

            #region AutoGen_Init

            goUpMenu = GetValue<UpMenuItem>("goUpMenu");
            txtQuantity = GetValue<TMP_Text>("txtQuantity");
            txtSubtotal = GetValue<TMP_Text>("txtSubtotal");
            txtDiscount = GetValue<TMP_Text>("txtDiscount");
            txtAmount = GetValue<TMP_Text>("txtAmount");
            btnConfirm = GetValue<Button>("btnConfirm");
            scrollRect = GetValue<ScrollRect>("scrollRect");

            btnConfirm.onClick.AddListener(OnClickbtnConfirm);

            #endregion

            goUpMenu.OnClickReturn += ClickReturn;
            EventManager.Instance.Subscribe(AddCommodityToShoppingCartEventArgs.EventId,
                AddCommodityToShoppingCartEvent);
            EventManager.Instance.Subscribe(ClearShoppingCartEventArgs.EventId, ClearShoppingCartEvent);

            commodityItem = ResourcesManager.Instance.Load<GameObject>(AssetConst
                .Assets_Res_Prefab_UI_Item_CommodityItem_prefab);
        }

        private void ClearShoppingCartEvent(object sender, GameEventArgs e)
        {
            foreach (var item in items)
            {
                GameObject.Destroy(item.gameObject);
            }

            items.Clear();
        }

        private void AddCommodityToShoppingCartEvent(object sender, GameEventArgs e)
        {
            var args = e as AddCommodityToShoppingCartEventArgs;
        }

        private void ClickReturn()
        {
            UIManager.Instance.BackLast();
        }

        public override void OnOpen()
        {
            base.OnOpen();
            goUpMenu.OnShow();
            UpdateShoppingCart();
        }

        void UpdateShoppingCart()
        {
            foreach (var item in items)
            {
                GameObject.Destroy(item.gameObject);
            }

            items.Clear();

            var shoppingCart = ShoppingCartManager.Instance.ShoppingCart;

            foreach (var cartData in shoppingCart.datas)
            {
                Gen(cartData);
            }

            txtQuantity.text = $"{shoppingCart.totalQuantity}";
            txtSubtotal.text = $"{shoppingCart.itemsSubTotal}";
            txtDiscount.text = $"{shoppingCart.discount}";
            txtAmount.text = $"{shoppingCart.totalAmount}";
        }

        void OnlyUpdateMsg()
        {
            var shoppingCart = ShoppingCartManager.Instance.ShoppingCart;

            txtQuantity.text = $"{shoppingCart.totalQuantity}";
            txtSubtotal.text = $"{shoppingCart.itemsSubTotal}";
            txtDiscount.text = $"{shoppingCart.discount}";
            txtAmount.text = $"{shoppingCart.totalAmount}";
        }

        void Gen(ShoppingCartData shoppingCartData)
        {
            var go = GameObject.Instantiate(commodityItem, scrollRect.content);
            var item = go.GetComponent<CommodityItem>();
            item.SetData(shoppingCartData);
            item.OnUpdateCallback += OnlyUpdateMsg;
            go.SetActive(true);
            items.Add(item);
        }

        #region AutoGen_Method

        private void OnClickbtnConfirm()
        {
            UIManager.Instance.ShowUIOnly(nameof(SubmitMessageUI));
        }

        #endregion

        public override void OnDispose()
        {
            base.OnDispose();
            goUpMenu.OnClickReturn -= ClickReturn;

            EventManager.Instance.Unsubscribe(AddCommodityToShoppingCartEventArgs.EventId,
                AddCommodityToShoppingCartEvent);
            EventManager.Instance.Unsubscribe(ClearShoppingCartEventArgs.EventId, ClearShoppingCartEvent);

            #region AutoGen_Dispose

            btnConfirm.onClick.RemoveListener(OnClickbtnConfirm);

            goUpMenu = null;
            txtQuantity = null;
            txtSubtotal = null;
            txtDiscount = null;
            txtAmount = null;
            btnConfirm = null;

            #endregion
        }
    }
}