LJH_Shop/niucloud/addon/mall/web/stores/cart.ts

import { defineStore } from 'pinia'
import {  getToken } from '@/utils/common'
import { addCart, editCart, deleteCart, clearCart, getCartList, getCartSum } from '@/addon/mall/api/cart';

interface Cart {
	cartList : AnyObject
	totalNum : number
	totalMoney : any
	isRepeat : boolean
}

const useCartStore = defineStore('cart', {
	state: () : Cart => {
		return {
			cartList: {}, // 购物车列表
			totalNum: 0, // 购物车商品总数量
			totalMoney: 0, // 购物车商品总价格
			isRepeat: false
		}
	},
	actions: {
		// 查询购物车列表
		getList() {
			if (!getToken()) return;
			getCartList({}).then(res => {
				let data = res.data;

				// 每次查询清空
				for (let k in this.cartList) {
					delete this.cartList[k]
				}
				if (Object.values(data).length) {
					Object.values(data).forEach((item:any) => {
						item.goods_list.forEach((subItem:any)=>{
							if (subItem.goods.status == 1 && subItem.goods.delete_time == 0) {
								let cart = {
									id: subItem.id,
									goods_id: subItem.goods_id,
									sku_id: subItem.sku_id,
									stock: subItem.goodsSku.stock,
									num: subItem.num,
									sale_price: subItem.goodsSku.sale_price,
									site_id: subItem.site_id
								}
								if (subItem.goods.is_discount && subItem.goodsSku.sale_price != subItem.goodsSku.price) {
                                    cart.sale_price = subItem.goodsSku.sale_price ? subItem.goodsSku.sale_price : subItem.goodsSku.price // 折扣价
                                } else if (subItem.goods.member_discount && getToken() && subItem.goodsSku.member_price != subItem.goodsSku.price) {
                                    cart.sale_price = subItem.goodsSku.member_price ? subItem.goodsSku.member_price : subItem.goodsSku.price // 会员价
                                }
								
								if (!this.cartList['goods_' + cart.goods_id]) {
									this.cartList['goods_' + cart.goods_id] = {};
								}
								this.cartList['goods_' + cart.goods_id]['sku_' + cart.sku_id] = cart;
							}
						})
					})
				}
				this.calculateNum();
			})
		},
		/**
		 * 购物车数量增加
		 * data：数据源
		 * step：记步数量，默认为：1，每次加一个，设置为：0时，按照 num 修改
		 */
		increase(data, step = 1, callback:any = null) {
			if (!data || (data && Object.keys(data).length == 0) || !data.goods_id || !data.sku_id) return;
			if (!getToken()) return;

			let num = data.num || 0; // 当前数量
			let updateNum = num + step; // 变更数量

			let api = data.id ? editCart : addCart;

			if (updateNum > parseInt(data.stock)) {
                ElMessage.error('商品库存不足')
				return;
			}

			if (this.isRepeat) return;
			this.isRepeat = true;

			// 更新存储数据
			if (data.id) {
				this.cartList['goods_' + data.goods_id]['sku_' + data.sku_id].num = updateNum;
			} else {

				// 如果商品第一次添加，则初始化数据
				if (!this.cartList['goods_' + data.goods_id]) {
					this.cartList['goods_' + data.goods_id] = {};
				}
				this.cartList['goods_' + data.goods_id]['sku_' + data.sku_id] = {
					id: data.id,
					goods_id: data.goods_id,
					sku_id: data.sku_id,
					stock: data.stock,
					num: updateNum,
					sale_price: data.sale_price,
					site_id: data.site_id
				}
			}

			this.calculateNum();

			api({
				id: data.id,
				goods_id: data.goods_id,
				sku_id: data.sku_id,
				num: updateNum,
				site_id: data.site_id
			}).then(res => {
				if(typeof callback == 'function') callback();
				this.getList()
				this.isRepeat = false;
			}).catch(res => {
				this.isRepeat = false;
			})

		},
		/**
		 * 购物车数量减少
		 * data：数据源
		 * step：记步数量，默认为：1，每次减一个，设置为：0时，按照 num 修改
		 */
		reduce(data, step = 1) {
			if (!data || (data && Object.keys(data).length == 0) || !data.goods_id || !data.sku_id) return;
			if (!getToken()) return;

			let num = data.num || 0; // 当前数量
			let updateNum = num - step; // 变更数量

			let api = updateNum > 0 ? editCart : deleteCart;

			if (this.isRepeat) return;
			this.isRepeat = true;

			// 更新存储数据
			if (updateNum > 0) {
				this.cartList['goods_' + data.goods_id]['sku_' + data.sku_id].num = updateNum;
			} else {
				delete this.cartList['goods_' + data.goods_id]['sku_' + data.sku_id];
				if (Object.keys(this.cartList['goods_' + data.goods_id]).length == 0) delete this.cartList['goods_' + data.goods_id];
			}

			this.calculateNum();

			api({
				ids: data.id, // 删除接口用
				id: data.id,
				goods_id: data.goods_id,
				sku_id: data.sku_id,
				num: updateNum,
				site_id: data.site_id
			}).then(res => {
				this.getList();
				this.isRepeat = false;
			}).catch(res => {
				this.isRepeat = false;
			})
		},
		// 购物车删除
		delete(ids, callback:any = null) {
			if (!ids) return;

			deleteCart({
				ids
			}).then(res => {
				this.getList();
				this.isRepeat = false;
				if (callback) callback();
			}).catch(res => {
				this.isRepeat = false;
			})
		},

		// 计算购物车商品的总数量、总价格
		calculateNum() {
			this.totalNum = 0;
			this.totalMoney = 0;
			if (Object.keys(this.cartList).length) {
				for (let goods in this.cartList) {
					let totalNum = 0;
					let totalMoney = 0;
					for (let sku in this.cartList[goods]) {
						if (typeof this.cartList[goods][sku] == 'object') {
							totalNum += this.cartList[goods][sku].num;
							totalMoney += this.cartList[goods][sku].num * this.cartList[goods][sku].sale_price;
						}
					}
					this.cartList[goods].totalNum = totalNum;
					this.cartList[goods].totalMoney = totalMoney.toFixed(2);

					this.totalNum += totalNum;
					this.totalMoney += totalMoney;

				}
			}

			this.totalMoney = this.totalMoney.toFixed(2);
		}
	}
})

export default useCartStore