265 lines
8.2 KiB
JavaScript
265 lines
8.2 KiB
JavaScript
export function isTui(item) {
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return item.status == "return" || item.status == "refund" || item.status == "refunding";
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}
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//是否使用会员价
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export function isUseVipPrice(vipUser, goods) {
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return vipUser.id && vipUser.isVip;
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}
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//计算商品券优惠价格
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export function returnProductCouponPrice(coup, goodsArr, vipUser) {
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const item = goodsArr.find((v) => v.productId == coup.proId);
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if (!item) {
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return 0;
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}
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const discountSaleAmount = item.discountSaleAmount * 1;
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if (discountSaleAmount > 0) {
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return discountSaleAmount * coup.num;
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}
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const memberPrice = item.memberPrice ? item.memberPrice : item.price;
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const price = item ? (isUseVipPrice(vipUser, item) ? memberPrice : item.price) : 0;
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return price * coup.num;
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}
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//返回新的商品列表，过滤掉退菜的，退单的商品
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export function returnNewGoodsList(arr) {
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let goodsMap = {};
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return arr.filter((v) => !isTui(v));
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}
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//根据当前购物车商品以及数量,已选券对应商品数量，判断该商品券是否可用
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export function returnCoupCanUse(goodsArr = [], coup, selCoupArr = []) {
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// if(!coup.use){
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// return false
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// }
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const findGoods = goodsArr.filter((v) => v.productId == coup.proId);
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if (!findGoods.length) {
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return false;
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}
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const findGoodsTotalNumber = findGoods.reduce((prve, cur) => {
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const num = cur.num - cur.refundNum - cur.returnNum;
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return prve + (num <= 0 ? 0 : num);
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}, 0);
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const selCoupNumber = selCoupArr
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.filter((v) => v.proId == coup.proId)
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.reduce((prve, cur) => {
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return prve + cur.num * 1;
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}, 0);
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if (selCoupNumber >= findGoodsTotalNumber) {
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return false;
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}
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return findGoodsTotalNumber < selCoupNumber ? false : true;
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}
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//查找购物车商品根据购物车商品数据返回商品券信息（抵扣价格以及是否满足可用需求）
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export function returnProductCoupon(coup, goodsArr, vipUser, selCoupArr = []) {
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const newGoodsArr = returnNewGoodsList(goodsArr);
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const item = newGoodsArr.find((v) => v.productId == coup.proId);
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if (!item) {
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return {
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...coup,
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discountAmount: 0,
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use: false,
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};
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}
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const discountSaleAmount = item.discountSaleAmount * 1;
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const memberPrice = item.memberPrice ? item.memberPrice : item.price;
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let price = item ? (isUseVipPrice(vipUser, item) ? memberPrice : item.price) : 0;
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price = discountSaleAmount > 0 ? discountSaleAmount : price;
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const discountAmount = (price * coup.num).toFixed(2);
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// const canUse = !coup.use ? false : (discountAmount > 0 && returnCoupCanUse(goodsArr, coup, selCoupArr))
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// const canUse=discountAmount>0
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const canUse = coup.use;
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return {
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...coup,
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discountAmount: discountAmount,
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use: canUse,
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};
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}
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/**
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* 根据购物车商品计算商品券抵扣价格以及是否满足可用需求
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* 1.商品券对应商品数量大于购物车对应商品数量不可用
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* 2.未在购物车找到相关商品不可用
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* @param {*} coupArr
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* @param {*} goodsArr
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* @param {*} vipUser
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* @returns
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*/
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export function returnProductAllCoup(coupArr, goodsArr, vipUser) {
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return coupArr.map((v) => {
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return returnProductCoupon(v, goodsArr, vipUser);
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});
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}
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//返回商品实际支付价格
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export function returnProductPayPrice(goods, vipUser) {
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const discountSaleAmount = goods.discountSaleAmount * 1;
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const memberPrice = goods.memberPrice ? goods.memberPrice : goods.price;
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const price = isUseVipPrice(vipUser, goods) ? memberPrice : goods.price;
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if (discountSaleAmount) {
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return discountSaleAmount;
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}
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return price;
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}
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//返回商品券抵扣的商品价格
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export function returnProductCoupAllPrice(productPriceArr, startIndex, num = 1, isVip = true) {
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num = num || 1;
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return productPriceArr.slice(startIndex, startIndex + num).reduce((prve, cur) => {
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let curPrice = 0;
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if (typeof cur === "object") {
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if (cur.discountSaleAmount * 1 > 0) {
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curPrice = cur.discountSaleAmount * 1;
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} else {
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curPrice = isVip ? cur.memberPrice * 1 : cur.price;
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}
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} else {
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curPrice = cur * 1;
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}
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return prve + curPrice;
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}, 0);
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}
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//返回商品券可抵扣的商品数量
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export function returnProductCanUseNum(productPriceArr, startIndex, num) {
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let n = 0;
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for (let i = 0; i < num; i++) {
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if (productPriceArr[startIndex * 1 + i]) {
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n += 1;
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} else {
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break;
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}
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}
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return n;
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}
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//返回同类商品券在同类商品价格数组里的开始位置
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export function returnProCoupStartIndex(coupArr, index) {
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return coupArr.slice(0, index).reduce((prve, cur) => {
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return prve + cur.num * 1;
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}, 0);
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}
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//返回商品数量从0到n每一个对应的价格对照表
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export function returnGoodsPayPriceMap(goodsArr) {
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return goodsArr.reduce((prve, cur) => {
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if (!prve.hasOwnProperty(cur.productId)) {
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prve[cur.productId] = [];
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}
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const n = cur.num - cur.returnNum;
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const arr = new Array(n <= 0 ? 0 : n).fill(cur).map((v) => {
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return {
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memberPrice: v.memberPrice ? v.memberPrice : v.price,
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price: v.price,
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discountSaleAmount: v.discountSaleAmount * 1,
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};
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});
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prve[cur.productId].push(...arr);
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return prve;
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}, {});
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}
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//计算商品券总优惠价格
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export function returnProductCouponAllPrice(coupArr, goodsArr, vipUser) {
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if (coupArr.length == 0) {
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return 0;
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}
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//商品分组
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const goodsMap = {};
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//商品数量从0到n每一个对应的价格
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const goodsPayPriceMap = {};
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//商品券分组
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let coupMap = {};
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for (let i in coupArr) {
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const coup = coupArr[i];
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if (coupMap.hasOwnProperty(coup.proId)) {
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coupMap[coup.proId].push(coup);
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} else {
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coupMap[coup.proId] = [coup];
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}
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}
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let total = 0;
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for (let key in coupMap) {
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const arr = coupMap[key];
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for (let i in arr) {
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const coup = arr[i];
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if (!goodsMap.hasOwnProperty(coup.proId)) {
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goodsMap[coup.proId] = goodsArr
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.filter((v) => v.productId == coup.proId)
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.map((v) => {
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return {
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...v,
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payPrice: returnProductPayPrice(v, vipUser),
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};
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})
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.sort((a, b) => {
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const aPrice = a.payPrice;
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const bPrice = b.payPrice;
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return aPrice - bPrice;
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});
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goodsPayPriceMap[coup.proId] = goodsMap[coup.proId].reduce((prve, cur) => {
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const arr = new Array(cur.num).fill(cur.payPrice);
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prve.push(...arr);
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return prve;
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}, []);
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}
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const proCoupStartIndex = returnProCoupStartIndex(arr, i);
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const coupNum = Math.min(goodsPayPriceMap[coup.proId].length, coup.num);
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total += returnProductCoupAllPrice(goodsPayPriceMap[coup.proId], proCoupStartIndex, coupNum);
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}
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}
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return total.toFixed(2);
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}
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//计算满减券总优惠价格
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export function returnFullReductionCouponAllPrice(coupArr) {
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if (coupArr.length == 0) {
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return 0;
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}
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return coupArr
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.filter((v) => v.type == 1)
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.reduce((a, b) => {
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const price = b.discountAmount;
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return a + price;
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}, 0)
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.toFixed(2);
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}
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//计算优惠券总价格
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export function returnCouponAllPrice(coupArr, goodsArr, vipUser) {
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const poductAllprice = returnProductCouponAllPrice(coupArr, goodsArr, vipUser);
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const pointAllPrice = returnFullReductionCouponAllPrice(coupArr);
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return (poductAllprice * 1 + pointAllPrice * 1).toFixed(2);
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}
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//返回当前满减券列表可用状态
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export function returnCanUseFullReductionCoupon(coupArr, payPrice, selCoup) {
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return coupArr
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.map((v) => {
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if (v.id == selCoup.id) {
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return { ...v, use: true };
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}
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const isfullAmount = payPrice * 1 >= v.fullAmount * 1;
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if (payPrice <= 0) {
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return {
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...v,
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use: false,
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};
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}
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return {
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...v,
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use: v.use && isfullAmount,
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};
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})
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.filter((v) => v.use);
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}
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//根据商品数量还有商品券数量返回优惠券可以使用的数量数组
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export function returnCanUseNumProductCoup(coupArr) {
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let productCoup = coupArr.filter((v) => v.type == 2);
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//商品券分组
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let coupMap = {};
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for (let i in productCoup) {
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const coup = productCoup[i];
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if (coupMap.hasOwnProperty(coup.proId)) {
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coupMap[coup.proId].push(coup);
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} else {
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coupMap[coup.proId] = [coup];
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}
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}
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return arr;
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}
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