252 lines
7.0 KiB
JavaScript
252 lines
7.0 KiB
JavaScript
export function isTui(item) {
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console.log("isTui",item.status);
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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&&goods.isMember
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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 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 goods_list = []
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Object.values(arr).forEach(item=>{
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goods_list = [...goods_list,...item]
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})
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return goods_list.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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return prve + cur.num * 1
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}, 0)
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const selCoupNumber = selCoupArr.filter(v => v.proId == coup.proId).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 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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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 memberPrice = goods.memberPrice ? goods.memberPrice : goods.price;
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const price = isUseVipPrice(vipUser,goods) ? memberPrice : goods.price;
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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,isMember=true){
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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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curPrice=isMember?cur.memberPrice*1:cur.price
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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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let goods_arr = []
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Object.values(goodsArr).forEach(item=>{
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goods_arr = [...goods_arr,...Object.values(item)]
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})
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return goods_arr.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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let arr = new Array(Math.ceil(cur.num)).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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}
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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.filter(v=>v.productId==coup.proId).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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}).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.number).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.number)
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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.filter(v => v.type == 1).reduce((a, b) => {
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const price = b.discountAmount
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return a + price;
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}, 0).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.map(v => {
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if (v.id == selCoup.id) {
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return v
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}
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const isfullAmount = payPrice >= 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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}
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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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} |