Untitled

import { CART_ADD_ITEM, CART_EMPTY, CART_REMOVE_ITEM, CART_SAVE_PAYMENT_METHOD, CART_SAVE_SHIPPING_ADDRESS } from "../constants/cartConstants";

export const cartReducer = (state = {cartItems: []}, action) => {
    switch (action.type){
        case CART_ADD_ITEM:
            const item = action.payload;
            const existItem = state.cartItems.find((x) => x.product === item.product);

            if(existItem){
                return{
                    ...state,
                    cartItems: state.cartItems.map((x)=>
                        x.product === existItem.product ? item : x
                    ),
                };
            }else{
                return {...state, cartItems: [...state.cartItems, item]};
            }
        case CART_REMOVE_ITEM:
            return{
                ...state,
                cartItems: state.cartItems.filter((x) => x.product !== action.payload),
            }
        case CART_SAVE_SHIPPING_ADDRESS:
            return { ...state, shippingAddress: action.payload };
        case CART_SAVE_PAYMENT_METHOD:
            return { ...state, paymentMethod: action.payload };
        case CART_EMPTY:
            return { ...state, cartItems: [] };
        default:
            return state;
    }
}