优化更新
This commit is contained in:
734
src/utils/goods-utils.js
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734
src/utils/goods-utils.js
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@@ -0,0 +1,734 @@
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import { BigNumber } from "bignumber.js";
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import _ from "lodash";
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/**
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* 返回商品单价
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* @param goods 商品
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* @param user 用户信息
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* @param {Object} shopInfo 店铺信息
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* @param {boolean} limitTimeDiscount - 限时折扣
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*/
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export function returnGoodsPrice(goods, user, shopInfo, limitTimeDiscount) {
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if (!goods) {
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return 0;
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}
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//是否可以使用会员价
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const canUseVipPrice =
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user && user.isVip && user.isMemberPrice && goods.memberPrice * 1 > 0;
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// 商家改价
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if (goods.discount_sale_amount * 1 > 0) {
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return goods.salePrice;
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}
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// 限时折扣
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if (limitTimeDiscount && limitTimeDiscount.id) {
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const canUseFoods = limitTimeDiscount.foods.split(",");
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const canUseLimit =
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limitTimeDiscount.foodType == 1 ||
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canUseFoods.includes(`${goods.productId}`);
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if (canUseLimit && limitTimeDiscount.discountPriority == "limit-time") {
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return new BigNumber(goods.salePrice)
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.times(limitTimeDiscount.discountRate / 100)
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.decimalPlaces(2, BigNumber.ROUND_UP)
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.toNumber();
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}
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if (canUseLimit && limitTimeDiscount.discountPriority == "vip-price") {
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if (canUseVipPrice) {
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return goods.memberPrice;
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} else {
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return new BigNumber(goods.salePrice)
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.times(limitTimeDiscount.discountRate / 100)
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.decimalPlaces(2, BigNumber.ROUND_UP)
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.toNumber();
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}
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}
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}
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if (canUseVipPrice) {
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return goods.memberPrice;
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}
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return goods.salePrice;
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}
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/**
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* 返回商品分组
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* @param arr 商品列表
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*/
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export function returnGoodsGroupMap(arr) {
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let map = {};
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arr.forEach((v) => {
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const key = v.productId + "_" + v.skuId;
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if (!map[key]) {
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map[key] = [];
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}
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map[key].push(v);
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});
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return map;
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}
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/**
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* 优惠券类型：1-满减券，2-商品兑换券，3-折扣券，4-第二件半价券，5-消费送券，6-买一送一券，7-固定价格券，8-免配送费券
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* @param coupon
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*/
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export function returnCoupType(coupon) {
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const couponTypes = {
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1: "满减券",
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2: "商品券",
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3: "折扣券",
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4: "第二件半价券",
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5: "消费送券",
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6: "买一送一券",
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7: "固定价格券",
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8: "免配送费券",
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};
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return couponTypes[coupon.type] || "未知类型";
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}
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/**
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* 返回商品券抵扣后的商品列表
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* @param canDikouGoodsArr 可抵扣商品列表
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* @param selCoupon 已选择的优惠券列表
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* @param user 用户信息
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*/
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export function returnCanDikouGoodsArr(args) {
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const { canDikouGoodsArr, selCoupon, user, shopInfo, limitTimeDiscount } =
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args;
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const types = [2, 4, 6];
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// 收集已抵扣商品并关联对应的优惠券类型
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const goodsCouponGoods = selCoupon
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.filter((v) => types.includes(v.type))
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.reduce((prev, cur) => {
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// 给每个抵扣商品添加所属优惠券类型
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const goodsWithType = cur.discount.hasDiscountGoodsArr.map((goods) => ({
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...goods,
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couponType: cur.type, // 记录该商品是被哪种类型的优惠券抵扣的
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}));
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prev.push(...goodsWithType);
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return prev;
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}, []);
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const arr = _.cloneDeep(canDikouGoodsArr)
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.map((v) => {
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const findCart = goodsCouponGoods.find((carts) => carts.id == v.id);
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if (findCart) {
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// 根据优惠券类型判断扣减数量
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if ([4, 6].includes(findCart.couponType)) {
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// 类型4（第二件半价）或6（买一送一），数量减2
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v.num -= 2;
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} else {
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// 其他类型（如类型2商品券），按原逻辑扣减对应数量
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v.num -= findCart.num;
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}
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}
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return v;
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})
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.filter((v) => {
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const canUseNum = v.num - (v.returnNum || 0);
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if (canUseNum <= 0 || v.is_temporary == 1 || v.is_gift == 1) {
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return false;
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}
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return true;
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}); // 过滤掉数量<=0的商品,赠菜，临时菜
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return arr;
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}
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/**
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* 返回商品是否享用了会员价/会员折扣
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* @param {*} goods
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*/
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function returnGoodsIsUseVipPrice(shopInfo, user, goods) {
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if (goods.is_time_discount) {
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return false;
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}
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if (shopInfo.isMemberPrice != 1 || user.isVip != 1) {
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return false;
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}
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if (shopInfo.isMemberPrice == 1 && user.isVip == 1) {
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if (goods.memberPrice <= 0) {
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return false;
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}
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return true;
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}
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}
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/**
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* 返回可以计算抵扣金额的商品列表
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*/
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function returnCanCalcGoodsList(canCalcGoodsArr, coupon, shopInfo, user) {
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return canCalcGoodsArr.filter((goods) => {
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console.log("goods");
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console.log(goods);
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if (
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!coupon.discountShare &&
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(goods.is_time_discount || goods.isTimeDiscount)
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) {
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return false;
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}
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if (
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!coupon.vipPriceShare &&
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returnGoodsIsUseVipPrice(shopInfo, user, goods)
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) {
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return false;
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}
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return true;
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});
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}
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/**
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* 判断优惠券是否可使用，并返回不可用原因
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*
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* @param {Object} args - 函数参数集合
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* @param {Array} args.canDikouGoodsArr - 可参与抵扣的商品列表
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* @param {Object} args.coupon - 优惠券信息对象
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* @param {boolean} args.coupon.use - 优惠券是否启用
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* @param {Array} args.coupon.useFoods - 优惠券适用的商品ID列表
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* @param {number} args.coupon.fullAmount - 优惠券使用门槛金额
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* @param {number} args.coupon.type - 优惠券类型
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* @param {number} args.goodsOrderPrice - 订单中所有商品的总金额
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* @param {Object} args.user - 用户信息对象
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* @param {Object} args.selCoupon - 已经选择的优惠券信息对象
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* @param {Object} args.shopInfo
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* @param {boolean} args.limitTimeDiscount - 限时折扣
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* @returns {Object} - { canUse: boolean, reason: string } 可用状态及不可用原因
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*/
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export function returnCouponCanUse(args) {
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let {
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canDikouGoodsArr,
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coupon,
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goodsOrderPrice,
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user,
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selCoupon,
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shopInfo,
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isMemberPrice,
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limitTimeDiscount,
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} = args;
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// 优惠券未启用
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if (!coupon.use) {
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return {
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canUse: false,
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reason: coupon.noUseRestrictions || "不在可用时间段内",
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};
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}
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if (
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limitTimeDiscount &&
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limitTimeDiscount.id &&
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limitTimeDiscount.foodType == 1 &&
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!coupon.discountShare
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) {
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return {
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canUse: false,
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reason: coupon.noUseRestrictions || "不可与限时折扣同享",
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};
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}
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// 计算门槛金额
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let fullAmount = goodsOrderPrice;
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canDikouGoodsArr = returnCanDikouGoodsArr({
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canDikouGoodsArr,
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selCoupon,
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user,
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shopInfo,
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limitTimeDiscount,
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});
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//优惠券指定门槛商品列表
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let canCalcGoodsArr = [...canDikouGoodsArr];
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//部分商品参与门槛计算
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if (coupon.thresholdFoods.length) {
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canCalcGoodsArr = canDikouGoodsArr.filter((v) => {
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return coupon.thresholdFoods.find((food) => food.id == v.productId);
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});
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}
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canCalcGoodsArr = returnCanCalcGoodsList(
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canCalcGoodsArr,
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coupon,
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shopInfo,
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user
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);
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console.log("canCalcGoodsArr");
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console.log(canCalcGoodsArr);
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fullAmount = canCalcGoodsArr.reduce((pre, cur) => {
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return (
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pre + returnGoodsPrice(cur, user, shopInfo, limitTimeDiscount) * cur.num
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);
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}, 0);
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// 是否全部商品可用
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const isDikouAll = coupon.useFoods.length === 0;
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// 订单可用商品列表
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let canUseGoodsArr = [];
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if (!isDikouAll) {
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canUseGoodsArr = canDikouGoodsArr.filter((v) => {
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return coupon.useFoods.find((food) => food.id == v.productId);
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});
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}
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// if (user.isVip && !coupon.vipPriceShare) {
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// return {
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// canUse: false,
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// reason: "非会员可用",
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// };
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// }
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if (selCoupon.length > 0 && !selCoupon[0].otherCouponShare) {
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return {
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canUse: false,
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reason: "当前选中的券不可与其他券同享",
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};
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}
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if (selCoupon.length > 0 && !coupon.otherCouponShare) {
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return {
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canUse: false,
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reason: "当前选中的券不可与其他券同享",
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};
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}
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// 满减券和折扣券计算门槛金额是否满足
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if ([1, 3].includes(coupon.type)) {
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if (canCalcGoodsArr.length <= 0) {
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return {
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canUse: false,
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reason: "没有可参与计算门槛的商品",
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};
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}
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// 不满足门槛金额
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if (fullAmount < coupon.fullAmount) {
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return {
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canUse: false,
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reason: `满${coupon.fullAmount}元可用，当前可参与金额${fullAmount}元`,
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};
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}
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}
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// 商品兑换券，第二件半价和买一送一判断是否有可用商品
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if ([2, 4, 5].includes(coupon.type)) {
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// 没有符合条件的商品
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if (isDikouAll && canDikouGoodsArr.length === 0) {
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return {
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canUse: false,
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reason: "没有符合条件的商品",
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};
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}
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if (!isDikouAll && canUseGoodsArr.length === 0) {
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return {
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canUse: false,
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reason: "没有符合条件的商品",
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};
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}
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if (coupon.type == 2) {
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if (canCalcGoodsArr.length <= 0) {
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return {
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canUse: false,
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reason: "没有符合计算门槛条件的商品",
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};
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}
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if (fullAmount < coupon.fullAmount) {
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return {
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canUse: false,
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reason: `满${coupon.fullAmount}元可用，当前可参与金额${fullAmount}元`,
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};
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}
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}
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}
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//商品兑换券是否达到门槛金额
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if (coupon.type == 2 && goodsOrderPrice < coupon.fullAmount) {
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return {
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canUse: false,
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reason: `满${coupon.fullAmount}元可用，当前可参与金额${fullAmount}元`,
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};
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}
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// 买一送一券特殊验证
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if (coupon.type === 6) {
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let canUse = false;
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if (isDikouAll) {
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canUse = canDikouGoodsArr.some((v) => v.num >= 2);
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} else if (canUseGoodsArr.length > 0) {
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canUse = canUseGoodsArr.some((v) => v.num >= 2);
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}
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if (!canUse) {
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return {
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canUse: false,
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reason: "需要购买至少2件相同的商品才能使用",
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};
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}
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}
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// 第二件半价券特殊验证
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if (coupon.type === 4) {
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let canUse = false;
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if (isDikouAll) {
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canUse = canDikouGoodsArr.some((v) => v.num >= 2);
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} else if (canUseGoodsArr.length > 0) {
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canUse = canUseGoodsArr.some((v) => v.num >= 2);
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}
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if (!canUse) {
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return {
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canUse: false,
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reason: "需要购买至少2件相同的商品才能使用",
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};
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}
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}
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// 所有条件都满足
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return {
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canUse: true,
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reason: "",
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};
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}
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/**
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* 计算抵扣商品金额
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* @param discountGoodsArr 可抵扣商品列表
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* @param discountNum 抵扣数量
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* @param user 用户信息
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* @param {Object} shopInfo 店铺信息
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* @param limitTimeDiscount 限时折扣
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*/
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export function calcDiscountGoodsArrPrice(
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discountGoodsArr,
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discountNum,
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user,
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shopInfo,
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limitTimeDiscount
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) {
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let hasCountNum = 0;
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let discountPrice = 0;
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let hasDiscountGoodsArr = [];
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for (let i = 0; i < discountGoodsArr.length; i++) {
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if (hasCountNum >= discountNum) {
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break;
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}
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const goods = discountGoodsArr[i];
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const shengyuNum = discountNum - hasCountNum;
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const num = Math.min(goods.num, shengyuNum);
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const realPrice = returnGoodsPrice(
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goods,
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user,
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shopInfo,
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limitTimeDiscount
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);
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discountPrice += realPrice * num;
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hasCountNum += num;
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hasDiscountGoodsArr.push({
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...goods,
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num,
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});
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}
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return {
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discountPrice,
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hasDiscountGoodsArr,
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};
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}
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/**
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* 计算优惠券抵扣金额
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* @param arr 可抵扣商品列表
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* @param coupon 优惠券
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* @param user 用户信息
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* @param goodsOrderPrice 商品订单金额
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* @param selCoupon 已选择的优惠券列表
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* @param shopInfo 店铺信息
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* @param limitTimeDiscount 限时折扣
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*/
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export function returnCouponDiscount(
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arr,
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coupon,
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user,
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goodsOrderPrice,
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selCoupon,
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shopInfo,
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limitTimeDiscount
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) {
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arr = returnCanDikouGoods(arr, user, shopInfo,limitTimeDiscount);
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const canDikouGoodsArr = returnCanDikouGoodsArr({
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canDikouGoodsArr: arr,
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selCoupon,
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user,
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shopInfo,
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limitTimeDiscount,
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});
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if (coupon.type == 2) {
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return returnCouponProductDiscount(
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canDikouGoodsArr,
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coupon,
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user,
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shopInfo,
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limitTimeDiscount
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||||
);
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}
|
||||
if (coupon.type == 6) {
|
||||
const result = returnCouponBuyOneGiveOneDiscount(
|
||||
canDikouGoodsArr,
|
||||
coupon,
|
||||
user,
|
||||
shopInfo,
|
||||
limitTimeDiscount
|
||||
);
|
||||
return result;
|
||||
}
|
||||
if (coupon.type == 4) {
|
||||
return returnSecoendDiscount(
|
||||
canDikouGoodsArr,
|
||||
coupon,
|
||||
user,
|
||||
shopInfo,
|
||||
limitTimeDiscount
|
||||
);
|
||||
}
|
||||
if (coupon.type == 3) {
|
||||
return returnCouponZhekouDiscount(
|
||||
canDikouGoodsArr,
|
||||
coupon,
|
||||
user,
|
||||
goodsOrderPrice,
|
||||
selCoupon,
|
||||
limitTimeDiscount
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 折扣券抵扣金额
|
||||
* @param canDikouGoodsArr 可抵扣商品列表
|
||||
* @param coupon 优惠券
|
||||
* @param user 用户信息
|
||||
* @param goodsOrderPrice 商品订单金额
|
||||
* @param selCoupon 已选择的优惠券列表
|
||||
* @param limitTimeDiscount 限时折扣
|
||||
*
|
||||
*/
|
||||
export function returnCouponZhekouDiscount(
|
||||
canDikouGoodsArr,
|
||||
coupon,
|
||||
user,
|
||||
goodsOrderPrice,
|
||||
selCoupon,
|
||||
limitTimeDiscount
|
||||
) {
|
||||
const { discountRate, maxDiscountAmount } = coupon;
|
||||
|
||||
// 计算商品优惠券折扣总和，使用BigNumber避免精度问题
|
||||
const goodsCouponDiscount = selCoupon
|
||||
.filter((v) => v.type == 2)
|
||||
.reduce((prve, cur) => {
|
||||
return new BigNumber(prve).plus(
|
||||
new BigNumber(cur.discount.discountPrice)
|
||||
);
|
||||
}, new BigNumber(0));
|
||||
|
||||
// 将商品订单价格转换为BigNumber并减去优惠券折扣
|
||||
const adjustedGoodsOrderPrice = new BigNumber(goodsOrderPrice).minus(
|
||||
goodsCouponDiscount
|
||||
);
|
||||
|
||||
// 计算优惠比例：(100 - 折扣率) / 100
|
||||
const discountAmountRatio = new BigNumber(100)
|
||||
.minus(discountRate)
|
||||
.dividedBy(100);
|
||||
|
||||
// 计算折扣金额：调整后的商品订单金额 × 优惠比例
|
||||
let discountPrice = adjustedGoodsOrderPrice
|
||||
.times(discountAmountRatio)
|
||||
.decimalPlaces(2, BigNumber.ROUND_FLOOR)
|
||||
.toNumber();
|
||||
|
||||
// 应用最大折扣金额限制
|
||||
if (maxDiscountAmount !== 0) {
|
||||
discountPrice =
|
||||
discountPrice >= maxDiscountAmount ? maxDiscountAmount : discountPrice;
|
||||
}
|
||||
|
||||
return {
|
||||
discountPrice, // 折扣抵扣金额（即优惠的金额）
|
||||
hasDiscountGoodsArr: [],
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* 商品券抵扣金额
|
||||
* @param canDikouGoodsArr 可抵扣商品列表
|
||||
* @param coupon 优惠券
|
||||
* @param user 用户信息
|
||||
* @param shopInfo 店铺信息
|
||||
* @param limitTimeDiscount 限时折扣
|
||||
*/
|
||||
export function returnCouponProductDiscount(
|
||||
canDikouGoodsArr,
|
||||
coupon,
|
||||
user,
|
||||
shopInfo,
|
||||
limitTimeDiscount
|
||||
) {
|
||||
const { useFoods, discountNum, useRule } = coupon;
|
||||
|
||||
//抵扣商品数组
|
||||
let discountGoodsArr = [];
|
||||
|
||||
//抵扣全部商品
|
||||
if (useFoods.length === 0) {
|
||||
if (useRule == "price_asc") {
|
||||
discountGoodsArr = canDikouGoodsArr.slice(discountNum * -1).reverse();
|
||||
} else {
|
||||
discountGoodsArr = canDikouGoodsArr.slice(0, discountNum);
|
||||
}
|
||||
} else {
|
||||
//抵扣选中商品
|
||||
const discountSelGoodsArr = canDikouGoodsArr.filter((v) =>
|
||||
useFoods.find((food) => food.id == v.productId)
|
||||
);
|
||||
if (useRule == "price_asc") {
|
||||
discountGoodsArr = discountSelGoodsArr.slice(discountNum * -1).reverse();
|
||||
} else {
|
||||
discountGoodsArr = discountSelGoodsArr.slice(0, discountNum);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
const result = calcDiscountGoodsArrPrice(
|
||||
discountGoodsArr,
|
||||
discountNum,
|
||||
user,
|
||||
shopInfo,
|
||||
limitTimeDiscount
|
||||
);
|
||||
return result;
|
||||
}
|
||||
|
||||
// 返回买一送一券抵扣详情
|
||||
/**
|
||||
* @param canDikouGoodsArr 可抵扣商品列表
|
||||
* @param coupon 优惠券
|
||||
* @param user 用户信息
|
||||
* @param shopInfo 店铺信息
|
||||
* @param limitTimeDiscount 限时折扣
|
||||
*/
|
||||
function returnCouponBuyOneGiveOneDiscount(
|
||||
canDikouGoodsArr,
|
||||
coupon,
|
||||
user,
|
||||
shopInfo,
|
||||
limitTimeDiscount
|
||||
) {
|
||||
const { useFoods, useRule } = coupon;
|
||||
//抵扣商品
|
||||
let discountGoods = undefined;
|
||||
//符合买一送一条件的商品
|
||||
const canUseGoods = canDikouGoodsArr.filter((v) => v.num >= 2);
|
||||
//抵扣全部商品
|
||||
if (useFoods.length === 0) {
|
||||
if (useRule == "price_asc") {
|
||||
discountGoods = canUseGoods[canUseGoods.length - 1];
|
||||
} else {
|
||||
discountGoods = canUseGoods[0];
|
||||
}
|
||||
} else {
|
||||
//符合抵扣条件的商品
|
||||
const canUseGoods1 = canUseGoods.filter((v) =>
|
||||
useFoods.find((food) => food.id == v.productId)
|
||||
);
|
||||
if (useRule == "price_asc") {
|
||||
discountGoods = canUseGoods1[canUseGoods1.length - 1];
|
||||
} else {
|
||||
discountGoods = canUseGoods1[0];
|
||||
}
|
||||
}
|
||||
let discountPrice = 0;
|
||||
let hasDiscountGoodsArr = [];
|
||||
if (discountGoods) {
|
||||
discountPrice = returnGoodsPrice(
|
||||
discountGoods,
|
||||
user,
|
||||
shopInfo,
|
||||
limitTimeDiscount
|
||||
);
|
||||
hasDiscountGoodsArr = [discountGoods];
|
||||
}
|
||||
return {
|
||||
discountPrice: discountPrice <= 0 ? 0 : discountPrice,
|
||||
hasDiscountGoodsArr,
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* 返回第二件半价券抵扣详情
|
||||
* @param canDikouGoodsArr 可抵扣商品列表
|
||||
* @param coupon 优惠券
|
||||
* @param user 用户信息
|
||||
* @param shopInfo 店铺信息
|
||||
* @param limitTimeDiscount 限时折扣
|
||||
*/
|
||||
function returnSecoendDiscount(
|
||||
canDikouGoodsArr,
|
||||
coupon,
|
||||
user,
|
||||
shopInfo,
|
||||
limitTimeDiscount
|
||||
) {
|
||||
const { useFoods, useRule } = coupon;
|
||||
//抵扣商品
|
||||
let discountGoods = undefined;
|
||||
//符合条件的商品
|
||||
const canUseGoods = canDikouGoodsArr.filter((v) => v.num >= 2);
|
||||
//抵扣全部商品
|
||||
if (useFoods.length === 0) {
|
||||
if (useRule == "price_asc") {
|
||||
discountGoods = canUseGoods[canUseGoods.length - 1];
|
||||
} else {
|
||||
discountGoods = canUseGoods[0];
|
||||
}
|
||||
} else {
|
||||
//符合抵扣条件的商品
|
||||
const canUseGoods1 = canUseGoods.filter((v) =>
|
||||
useFoods.find((food) => food.id == v.productId)
|
||||
);
|
||||
if (useRule == "price_asc") {
|
||||
discountGoods = canUseGoods1[canUseGoods1.length - 1];
|
||||
} else {
|
||||
discountGoods = canUseGoods1[0];
|
||||
}
|
||||
}
|
||||
let discountPrice = 0;
|
||||
let hasDiscountGoodsArr = [];
|
||||
if (discountGoods) {
|
||||
discountPrice = returnGoodsPrice(
|
||||
discountGoods,
|
||||
user,
|
||||
shopInfo,
|
||||
limitTimeDiscount
|
||||
);
|
||||
hasDiscountGoodsArr = [discountGoods];
|
||||
}
|
||||
//返回半价价格
|
||||
return {
|
||||
discountPrice:
|
||||
discountPrice <= 0
|
||||
? 0
|
||||
: new BigNumber(discountPrice).dividedBy(2).toNumber(),
|
||||
hasDiscountGoodsArr,
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* 返回可以抵扣优惠券的商品列表,过滤掉赠品、临时商品,价格从高到低排序
|
||||
* @param arr 商品列表
|
||||
* @param user 用户信息
|
||||
* @param shopInfo 店铺信息
|
||||
* @param limitTimeDiscount 限时折扣
|
||||
*/
|
||||
export function returnCanDikouGoods(arr, user, shopInfo, limitTimeDiscount) {
|
||||
const result = arr
|
||||
.filter((v) => {
|
||||
return v.is_temporary != 1 && v.is_gift != 1;
|
||||
})
|
||||
.filter((v) => {
|
||||
return v.num > 0;
|
||||
})
|
||||
.sort((a, b) => {
|
||||
return (
|
||||
returnGoodsPrice(b, user, shopInfo, limitTimeDiscount) -
|
||||
returnGoodsPrice(a, user, shopInfo, limitTimeDiscount)
|
||||
);
|
||||
});
|
||||
return result;
|
||||
}
|
||||
Reference in New Issue
Block a user