fix: 代客下单修改
This commit is contained in:
483
src/utils/coupon-utils.js
Normal file
483
src/utils/coupon-utils.js
Normal file
@@ -0,0 +1,483 @@
|
||||
import { BigNumber } from "bignumber.js";
|
||||
import _ from "lodash";
|
||||
|
||||
/**
|
||||
* 返回商品单价
|
||||
* @param goods 商品
|
||||
* @param user 用户信息
|
||||
* @param {Object} shopInfo
|
||||
*/
|
||||
export function returnGoodsPrice(goods, user, shopInfo) {
|
||||
if (!goods) {
|
||||
return 0;
|
||||
}
|
||||
if (goods.discount_sale_amount * 1 > 0) {
|
||||
return goods.discount_sale_amount;
|
||||
}
|
||||
if (shopInfo && !shopInfo.isMemberPrice) {
|
||||
return goods.salePrice;
|
||||
}
|
||||
if (user.isVip && goods.memberPrice * 1 <= goods.salePrice * 1 && goods.memberPrice * 1 > 0) {
|
||||
return goods.memberPrice;
|
||||
}
|
||||
return goods.salePrice;
|
||||
}
|
||||
|
||||
/**
|
||||
* 返回商品分组
|
||||
* @param arr 商品列表
|
||||
*/
|
||||
export function returnGoodsGroupMap(arr) {
|
||||
let map = {};
|
||||
arr.forEach((v) => {
|
||||
const key = v.productId + "_" + v.skuId;
|
||||
if (!map[key]) {
|
||||
map[key] = [];
|
||||
}
|
||||
map[key].push(v);
|
||||
});
|
||||
return map;
|
||||
}
|
||||
|
||||
/**
|
||||
* 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
|
||||
* @param coupon
|
||||
*/
|
||||
export function returnCoupType(coupon) {
|
||||
const couponTypes = {
|
||||
1: "满减券",
|
||||
2: "商品券",
|
||||
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",
|
||||
};
|
||||
return couponTypes[coupon.type] || "未知类型";
|
||||
}
|
||||
|
||||
/**
|
||||
* 返回商品券抵扣后的商品列表
|
||||
* @param canDikouGoodsArr 可抵扣商品列表
|
||||
* @param selCoupon 已选择的优惠券列表
|
||||
* @param user 用户信息
|
||||
*/
|
||||
export function returnCanDikouGoodsArr(canDikouGoodsArr, selCoupon, user) {
|
||||
const types = [2, 4, 6];
|
||||
// 收集已抵扣商品并关联对应的优惠券类型
|
||||
const goodsCouponGoods = selCoupon
|
||||
.filter((v) => types.includes(v.type))
|
||||
.reduce((prev, cur) => {
|
||||
// 给每个抵扣商品添加所属优惠券类型
|
||||
const goodsWithType = cur.discount.hasDiscountGoodsArr.map((goods) => ({
|
||||
...goods,
|
||||
couponType: cur.type, // 记录该商品是被哪种类型的优惠券抵扣的
|
||||
}));
|
||||
prev.push(...goodsWithType);
|
||||
return prev;
|
||||
}, []);
|
||||
|
||||
const arr = _.cloneDeep(canDikouGoodsArr)
|
||||
.map((v) => {
|
||||
const findCart = goodsCouponGoods.find((carts) => carts.id == v.id);
|
||||
if (findCart) {
|
||||
// 根据优惠券类型判断扣减数量
|
||||
if ([4, 6].includes(findCart.couponType)) {
|
||||
// 类型4（第二件半价）或6（买一送一），数量减2
|
||||
v.num -= 2;
|
||||
} else {
|
||||
// 其他类型（如类型2商品券），按原逻辑扣减对应数量
|
||||
v.num -= findCart.num;
|
||||
}
|
||||
}
|
||||
return v;
|
||||
})
|
||||
.filter((v) => v.num > 0); // 过滤掉数量<=0的商品
|
||||
|
||||
return arr;
|
||||
}
|
||||
|
||||
/**
|
||||
* 判断优惠券是否可使用，并返回不可用原因
|
||||
*
|
||||
* @param {Object} args - 函数参数集合
|
||||
* @param {Array} args.canDikouGoodsArr - 可参与抵扣的商品列表
|
||||
* @param {Object} args.coupon - 优惠券信息对象
|
||||
* @param {boolean} args.coupon.use - 优惠券是否启用
|
||||
* @param {Array} args.coupon.useFoods - 优惠券适用的商品ID列表
|
||||
* @param {number} args.coupon.fullAmount - 优惠券使用门槛金额
|
||||
* @param {number} args.coupon.type - 优惠券类型
|
||||
* @param {number} args.goodsOrderPrice - 订单中所有商品的总金额
|
||||
* @param {Object} args.user - 用户信息对象
|
||||
* @param {Object} args.selCoupon - 已经选择的优惠券信息对象
|
||||
* @param {Object} args.shopInfo
|
||||
* @returns {Object} - { canUse: boolean, reason: string } 可用状态及不可用原因
|
||||
*/
|
||||
export function returnCouponCanUse(args) {
|
||||
let { canDikouGoodsArr, coupon, goodsOrderPrice, user, selCoupon, shopInfo } = args;
|
||||
|
||||
// 优惠券未启用
|
||||
if (!coupon.use) {
|
||||
return {
|
||||
canUse: false,
|
||||
reason: "优惠券未启用",
|
||||
};
|
||||
}
|
||||
|
||||
// 计算门槛金额
|
||||
let fullAmount = goodsOrderPrice;
|
||||
canDikouGoodsArr = returnCanDikouGoodsArr(canDikouGoodsArr, selCoupon, user, shopInfo);
|
||||
|
||||
//优惠券指定门槛商品列表
|
||||
let canCalcGoodsArr = [...canDikouGoodsArr];
|
||||
//部分商品参与门槛计算
|
||||
if (coupon.thresholdFoods.length) {
|
||||
canCalcGoodsArr = canDikouGoodsArr.filter((v) => {
|
||||
return coupon.thresholdFoods.find((food) => food.id == v.productId);
|
||||
});
|
||||
fullAmount = canCalcGoodsArr.reduce((pre, cur) => {
|
||||
return pre + returnGoodsPrice(cur, user, shopInfo) * cur.num;
|
||||
}, 0);
|
||||
}
|
||||
|
||||
// 是否全部商品可用
|
||||
const isDikouAll = coupon.useFoods.length === 0;
|
||||
// 订单可用商品列表
|
||||
let canUseGoodsArr = [];
|
||||
if (!isDikouAll) {
|
||||
canUseGoodsArr = canDikouGoodsArr.filter((v) => {
|
||||
return coupon.useFoods.find((food) => food.id == v.productId);
|
||||
});
|
||||
}
|
||||
if (user.isVip && !coupon.vipPriceShare) {
|
||||
return {
|
||||
canUse: false,
|
||||
reason: "非会员可用",
|
||||
};
|
||||
}
|
||||
if (selCoupon.length > 0 && !selCoupon[0].otherCouponShare) {
|
||||
return {
|
||||
canUse: false,
|
||||
reason: "当前选中的券不可与其他券同享",
|
||||
};
|
||||
}
|
||||
if (selCoupon.length > 0 && !coupon.otherCouponShare) {
|
||||
return {
|
||||
canUse: false,
|
||||
reason: "当前选中的券不可与其他券同享",
|
||||
};
|
||||
}
|
||||
// 满减券和折扣券计算门槛金额是否满足
|
||||
if ([1, 3].includes(coupon.type)) {
|
||||
if (canCalcGoodsArr.length <= 0) {
|
||||
return {
|
||||
canUse: false,
|
||||
reason: "没有可参与计算门槛的商品",
|
||||
};
|
||||
}
|
||||
// 不满足门槛金额
|
||||
if (fullAmount < coupon.fullAmount) {
|
||||
return {
|
||||
canUse: false,
|
||||
reason: `满${coupon.fullAmount}元可用，当前可参与金额${fullAmount}元`,
|
||||
};
|
||||
}
|
||||
}
|
||||
// 商品兑换券，第二件半价和买一送一判断是否有可用商品
|
||||
if ([2, 4, 5].includes(coupon.type)) {
|
||||
// 没有符合条件的商品
|
||||
if (!isDikouAll && canCalcGoodsArr.length === 0) {
|
||||
return {
|
||||
canUse: false,
|
||||
reason: "没有符合条件的商品",
|
||||
};
|
||||
}
|
||||
}
|
||||
//商品兑换券是否达到门槛金额
|
||||
if (coupon.type == 2 && goodsOrderPrice < coupon.fullAmount) {
|
||||
return {
|
||||
canUse: false,
|
||||
reason: `满${coupon.fullAmount}元可用，当前可参与金额${fullAmount}元`,
|
||||
};
|
||||
}
|
||||
|
||||
// 买一送一券特殊验证
|
||||
if (coupon.type === 6) {
|
||||
let canUse = false;
|
||||
if (isDikouAll) {
|
||||
canUse = canDikouGoodsArr.some((v) => v.num >= 2);
|
||||
} else if (canCalcGoodsArr.length > 0) {
|
||||
canUse = canCalcGoodsArr.some((v) => v.num >= 2);
|
||||
}
|
||||
|
||||
if (!canUse) {
|
||||
return {
|
||||
canUse: false,
|
||||
reason: "需要购买至少2件相同的商品才能使用",
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
// 第二件半价券特殊验证
|
||||
if (coupon.type === 4) {
|
||||
let canUse = false;
|
||||
if (isDikouAll) {
|
||||
canUse = canDikouGoodsArr.some((v) => v.num >= 2);
|
||||
} else if (canCalcGoodsArr.length > 0) {
|
||||
canUse = canCalcGoodsArr.some((v) => v.num >= 2);
|
||||
}
|
||||
|
||||
if (!canUse) {
|
||||
return {
|
||||
canUse: false,
|
||||
reason: "需要购买至少2件相同的商品才能使用",
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
// 所有条件都满足
|
||||
return {
|
||||
canUse: true,
|
||||
reason: "",
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* 计算抵扣商品金额
|
||||
* @param discountGoodsArr 可抵扣商品列表
|
||||
* @param discountNum 抵扣数量
|
||||
* @param user 用户信息
|
||||
* @param {Object} shopInfo 店铺信息
|
||||
*/
|
||||
export function calcDiscountGoodsArrPrice(discountGoodsArr, discountNum, user, shopInfo) {
|
||||
let hasCountNum = 0;
|
||||
let discountPrice = 0;
|
||||
let hasDiscountGoodsArr = [];
|
||||
for (let i = 0; i < discountGoodsArr.length; i++) {
|
||||
if (hasCountNum >= discountNum) {
|
||||
break;
|
||||
}
|
||||
const goods = discountGoodsArr[i];
|
||||
const shengyuNum = discountNum - hasCountNum;
|
||||
const num = Math.min(goods.num, shengyuNum);
|
||||
discountPrice += returnGoodsPrice(goods, user, shopInfo) * num;
|
||||
hasCountNum += num;
|
||||
hasDiscountGoodsArr.push({
|
||||
...goods,
|
||||
num,
|
||||
});
|
||||
}
|
||||
return {
|
||||
discountPrice,
|
||||
hasDiscountGoodsArr,
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* 计算优惠券抵扣金额
|
||||
* @param arr 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 shopInfo 店铺信息
|
||||
*/
|
||||
export function returnCouponDiscount(arr, coupon, user, goodsOrderPrice, selCoupon, shopInfo) {
|
||||
const canDikouGoodsArr = returnCanDikouGoodsArr(arr, selCoupon, user);
|
||||
if (coupon.type == 2) {
|
||||
return returnCouponProductDiscount(canDikouGoodsArr, coupon, user, shopInfo);
|
||||
}
|
||||
if (coupon.type == 6) {
|
||||
return returnCouponBuyOneGiveOneDiscount(canDikouGoodsArr, coupon, user, shopInfo);
|
||||
}
|
||||
if (coupon.type == 4) {
|
||||
return returnSecoendDiscount(canDikouGoodsArr, coupon, user, shopInfo);
|
||||
}
|
||||
if (coupon.type == 3) {
|
||||
return returnCouponZhekouDiscount(canDikouGoodsArr, coupon, user, goodsOrderPrice, selCoupon);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 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
|
||||
*
|
||||
*/
|
||||
export function returnCouponZhekouDiscount(
|
||||
canDikouGoodsArr,
|
||||
coupon,
|
||||
user,
|
||||
goodsOrderPrice,
|
||||
selCoupon
|
||||
) {
|
||||
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);
|
||||
console.log("adjustedGoodsOrderPrice", adjustedGoodsOrderPrice.toNumber());
|
||||
|
||||
// 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
|
||||
*/
|
||||
export function returnCouponProductDiscount(canDikouGoodsArr, coupon, user, shopInfo) {
|
||||
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(canDikouGoodsArr.length - discountNum, canDikouGoodsArr.length)
|
||||
.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(discountSelGoodsArr.length - discountNum, discountSelGoodsArr.length)
|
||||
.reverse();
|
||||
} else {
|
||||
discountGoodsArr = discountSelGoodsArr.slice(0, discountNum);
|
||||
}
|
||||
}
|
||||
const result = calcDiscountGoodsArrPrice(discountGoodsArr, discountNum, user, shopInfo);
|
||||
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
|
||||
*/
|
||||
function returnCouponBuyOneGiveOneDiscount(canDikouGoodsArr, coupon, user, shopInfo) {
|
||||
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.slice(0, 1);
|
||||
}
|
||||
} 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.slice(0, 1);
|
||||
}
|
||||
}
|
||||
const discountPrice = returnGoodsPrice(discountGoods, user, shopInfo);
|
||||
const hasDiscountGoodsArr = [discountGoods];
|
||||
return {
|
||||
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
|
||||
*/
|
||||
function returnSecoendDiscount(canDikouGoodsArr, coupon, user, shopInfo) {
|
||||
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.slice(0, 1);
|
||||
}
|
||||
} 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.slice(0, 1);
|
||||
}
|
||||
}
|
||||
console.log("returnSecoendDiscount:discountGoods", discountGoods);
|
||||
const discountPrice = returnGoodsPrice(discountGoods[0], user, shopInfo);
|
||||
console.log("returnSecoendDiscount:discountPrice", discountPrice);
|
||||
const hasDiscountGoodsArr = [discountGoods];
|
||||
//返回半价价格
|
||||
return {
|
||||
discountPrice: 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
|
||||
*/
|
||||
export function returnCanDikouGoods(arr, user, shopInfo) {
|
||||
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) - returnGoodsPrice(a, user, shopInfo);
|
||||
});
|
||||
return result;
|
||||
}
|
||||
Reference in New Issue
Block a user