代客下单逻辑修改

lib/limit.ts

@@ -0,0 +1,216 @@
+import BigNumber from "bignumber.js";
+
+import _ from "lodash";
+
+import {
+  BaseCartItem,
+  ShopUserInfo,
+  ShopInfo,
+  TimeLimitDiscountConfig,
+  CanReturnMemberPriceArgs,
+  returnPriceArgs,
+} from "./types";
+
+/**
+ * 判断商品是否可以使用限时折扣
+ * @param goods 商品对象
+ * @param limitTimeDiscountRes 限时折扣配置
+ * @param shopInfo  店铺信息
+ * @param shopUserInfo 店铺用户信息
+ * @param idKey 商品ID键名，默认"id"
+ * @returns
+ */
+export function canUseLimitTimeDiscount(
+  goods: BaseCartItem,
+  limitTimeDiscountRes: TimeLimitDiscountConfig | null | undefined,
+  shopInfo: ShopInfo,
+  shopUserInfo: ShopUserInfo,
+  idKey = "id" as keyof BaseCartItem
+) {
+  shopInfo = shopInfo || {};
+  shopUserInfo = shopUserInfo || {};
+  if (!limitTimeDiscountRes || !limitTimeDiscountRes.id) {
+    return false;
+  }
+
+  const canUseFoods = (limitTimeDiscountRes.foods || "").split(",");
+
+  const goodsCanUse =
+    limitTimeDiscountRes.foodType == 1 ||
+    canUseFoods.includes(`${goods[idKey]}`);
+  if (!goodsCanUse) {
+    return false;
+  }
+  if (limitTimeDiscountRes.discountPriority == "limit-time") {
+    return true;
+  }
+  if (limitTimeDiscountRes.discountPriority == "vip-price") {
+    if (shopUserInfo.isVip != 1 || shopUserInfo.isMemberPrice != 1) {
+      return true;
+    }
+
+    if (
+      shopUserInfo.isVip == 1 &&
+      shopUserInfo.isMemberPrice == 1 &&
+      goods.memberPrice * 1 <= 0
+    ) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+/**
+ * 返回商品显示价格
+ * @params {*} args 参数对象
+ * @params {*} args.goods 商品对象
+ * @params {*} args.shopInfo 店铺信息
+ * @params {*} args.limitTimeDiscountRes 限时折扣信息
+ * @params {*} args.shopUserInfo 店铺用户信息
+ * @returns
+ */
+export function returnPrice(args: returnPriceArgs) {
+  let {
+    goods,
+    shopInfo,
+    limitTimeDiscountRes,
+    shopUserInfo,
+    idKey = "product_id",
+  } = args;
+  limitTimeDiscountRes = limitTimeDiscountRes || {
+    foods: "",
+    foodType: 2,
+    discountPriority: "",
+    discountRate: 0,
+    id: 0,
+    shopId: 0,
+    useType: "",
+  };
+  const canUseFoods = (limitTimeDiscountRes.foods || "").split(",");
+  const includesGoods =
+    limitTimeDiscountRes.foodType == 1 ||
+    canUseFoods.includes("" + goods[idKey]);
+  shopInfo = shopInfo || {};
+  shopUserInfo = shopUserInfo || {};
+  if (
+    shopUserInfo.isMemberPrice == 1 &&
+    shopUserInfo.isVip == 1 &&
+    shopInfo.isMemberPrice == 1
+  ) {
+    const memberPrice = goods.memberPrice || goods.salePrice;
+
+    //是会员而且启用会员价
+    if (limitTimeDiscountRes) {
+      //使用限时折扣
+      //限时折扣优先
+      if (limitTimeDiscountRes.discountPriority == "limit-time") {
+        if (includesGoods) {
+          return returnLimitPrice({
+            price: goods.salePrice,
+            limitTimeDiscountRes,
+          });
+        } else {
+          return memberPrice;
+        }
+      }
+      if (
+        limitTimeDiscountRes.discountPriority == "vip-price" &&
+        includesGoods
+      ) {
+        if (goods.memberPrice * 1 > 0) {
+          //会员优先
+          return memberPrice;
+        } else {
+          const price = returnLimitPrice({
+            price: goods.salePrice,
+            limitTimeDiscountRes,
+            goods: goods,
+          });
+
+          return price;
+        }
+      } else {
+        return memberPrice;
+      }
+    } else {
+      //是会员没有限时折扣
+      return memberPrice;
+    }
+  } else {
+    // console.log('不是会员或者没有启用会员价',goods,limitTimeDiscountRes);
+    //不是会员或者没有启用会员价
+    if (limitTimeDiscountRes && limitTimeDiscountRes.id && includesGoods) {
+      const price = returnLimitPrice({
+        price: goods.salePrice,
+        limitTimeDiscountRes,
+        goods: goods,
+      });
+
+      return price;
+    } else {
+      return goods.salePrice;
+    }
+  }
+}
+
+interface returnLimitPriceArgs {
+  limitTimeDiscountRes: TimeLimitDiscountConfig | null | undefined;
+  price: number;
+  goods?: BaseCartItem;
+}
+/**
+ * 返回限时折扣价格
+ * @params {*} args 参数对象
+ * @params {*} args.limitTimeDiscountRes 限时折扣信息
+ * @params {*} args.price 商品价格
+ * @param  {*} args.goods 商品对象
+ * @returns
+ */
+export function returnLimitPrice(args: returnLimitPriceArgs) {
+  const { limitTimeDiscountRes, price, goods } = args;
+  const discountRate = new BigNumber(
+    limitTimeDiscountRes ? limitTimeDiscountRes.discountRate : 100
+  ).dividedBy(100);
+
+  const result = BigNumber(price)
+    .times(discountRate)
+    .decimalPlaces(2, BigNumber.ROUND_UP)
+    .toNumber();
+  return result;
+}
+
+/**
+ * 判断是否返回会员价
+ * @param {*} args 参数对象
+ * @param {*} args.shopInfo 店铺信息
+ * @param {*} args.shopUserInfo 店铺用户信息
+ * @returns
+ */
+export function canReturnMemberPrice(args: CanReturnMemberPriceArgs) {
+  const { shopInfo, shopUserInfo } = args;
+  if (shopUserInfo.isMemberPrice == 1 && shopUserInfo.isVip == 1) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+/**
+ * 返回会员价格
+ * @param {*} goods
+ * @returns
+ */
+export function returnMemberPrice(goods: BaseCartItem) {
+  return goods.memberPrice || goods.salePrice;
+}
+
+export const utils = {
+  returnPrice,
+  canUseLimitTimeDiscount,
+  returnLimitPrice,
+  canReturnMemberPrice,
+  returnMemberPrice,
+};
+
+export default utils;