1276 lines
51 KiB
TypeScript
1276 lines
51 KiB
TypeScript
import { BigNumber } from "bignumber.js";
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// 配置BigNumber精度
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BigNumber.set({
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DECIMAL_PLACES: 2,
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ROUNDING_MODE: BigNumber.ROUND_DOWN, // 向下取整,符合业务需求
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});
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/**
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* 购物车订单价格计算公共库
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* 功能:覆盖订单全链路费用计算(商品价格、优惠券、积分、餐位费等),支持策略扩展
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* 小数处理:使用bignumber.js确保精度,统一舍去小数点后两位(如 10.129 → 10.12,15.998 → 15.99)
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* 扩展设计:优惠券/营销活动采用策略模式,新增类型仅需扩展策略,无需修改核心逻辑
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* 关键规则:
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* - 所有优惠券均支持指定门槛商品(后端foods字段:空字符串=全部商品,ID字符串=指定商品ID)
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* - 与限时折扣/会员价同享规则:开启则门槛计算含对应折扣,关闭则用原价/非会员价
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* 字段说明:
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* - BaseCartItem.id:购物车项ID(唯一标识购物车中的条目)
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* - BaseCartItem.product_id:商品ID(唯一标识商品,用于优惠券/活动匹配)
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* - BaseCartItem.skuData.id:SKU ID(唯一标识商品规格)
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*/
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// ============================ 1. 基础类型定义(核心修正:明确ID含义) ============================
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/** 商品类型枚举 */
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export enum GoodsType {
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NORMAL = "normal", // 普通商品
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WEIGHT = "weight", // 称重商品
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GIFT = "gift", // 赠菜(继承普通商品逻辑,标记用)
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EMPTY = "", // 空字符串类型(后端未返回时默认归类为普通商品)
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PACKAGE = "package", // 打包商品(如套餐/预打包商品,按普通商品逻辑处理,可扩展特殊规则)
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}
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/** 优惠券计算结果类型(新增细分字段) */
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interface CouponResult {
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deductionAmount: number; // 抵扣金额
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excludedProductIds: string[]; // 不适用商品ID列表(注意:是商品ID,非购物车ID)
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usedCoupon: Coupon | undefined; // 实际使用的优惠券
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productCouponDeduction: number; // 新增:商品优惠券抵扣(兑换券等)
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fullCouponDeduction: number; // 新增:满减优惠券抵扣
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}
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/** 兑换券计算结果类型(新增细分字段) */
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interface ExchangeCalculationResult {
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deductionAmount: number;
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excludedProductIds: string[]; // 不适用商品ID列表(商品ID)
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productCouponDeduction: number; // 新增:兑换券属于商品券,同步记录
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}
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/** 优惠券类型枚举 */
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export enum CouponType {
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FULL_REDUCTION = "full_reduction", // 满减券
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DISCOUNT = "discount", // 折扣券
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SECOND_HALF = "second_half", // 第二件半价券
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BUY_ONE_GET_ONE = "buy_one_get_one", // 买一送一券
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EXCHANGE = "exchange", // 商品兑换券
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}
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/** 后端返回的优惠券原始字段类型 */
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export interface BackendCoupon {
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id?: number; // 自增主键(int64)
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shopId?: number; // 店铺ID(int64)
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syncId?: number; // 同步Id(int64)
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type?: number; // 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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name?: string; // 券名称
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useShopType?: string; // 可用门店类型:only-仅本店;all-所有门店,custom-指定门店
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useShops?: string; // 可用门店(逗号分隔字符串,如"1,2,3")
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useType?: string; // 可使用类型:dine堂食/pickup自取/deliv配送/express快递
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validType?: string; // 有效期类型:fixed(固定时间),custom(自定义时间)
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validDays?: number; // 有效期(天)
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validStartTime?: string; // 有效期开始时间(如"2024-01-01 00:00:00")
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validEndTime?: string; // 有效期结束时间
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daysToTakeEffect?: number; // 隔天生效
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useDays?: string; // 可用周期(如"周一,周二")
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useTimeType?: string; // 可用时间段类型:all-全时段,custom-指定时段
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useStartTime?: string; // 可用开始时间(每日)
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useEndTime?: string; // 可用结束时间(每日)
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getType?: string; // 发放设置:不可自行领取/no,可领取/yes
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getMode?: string; // 用户领取方式
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giveNum?: number; // 总发放数量,-10086为不限量
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getUserType?: string; // 可领取用户:全部/all,新用户一次/new,仅会员/vip
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getLimit?: number; // 每人领取限量,-10086为不限量
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useLimit?: number; // 每人每日使用限量,-10086为不限量
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discountShare?: number; // 与限时折扣同享:0-否,1-是
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vipPriceShare?: number; // 与会员价同享:0-否,1-是
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ruleDetails?: string; // 附加规则说明
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status?: number; // 状态:0-禁用,1-启用
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useNum?: number; // 已使用数量
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leftNum?: number; // 剩余数量
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foods?: string; // 指定门槛商品(逗号分隔字符串,如"101,102",此处为商品ID)
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fullAmount?: number; // 使用门槛:满多少金额(元)
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discountAmount?: number; // 使用门槛:减多少金额(元)
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discountRate?: number; // 折扣%(如90=9折)
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maxDiscountAmount?: number; // 可抵扣最大金额(元)
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useRule?: string; // 使用规则:price_asc-价格低到高,price_desc-高到低
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discountNum?: number; // 抵扣数量
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otherCouponShare?: number; // 与其它优惠共享:0-否,1-是
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createTime?: string; // 创建时间
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updateTime?: string; // 更新时间
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}
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/** 营销活动类型枚举 */
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export enum ActivityType {
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TIME_LIMIT_DISCOUNT = "time_limit_discount", // 限时折扣
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}
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/** 基础购物车商品项(核心修正:新增product_id,明确各ID含义) */
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export interface BaseCartItem {
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id: string | number; // 购物车ID(唯一标识购物车中的条目,如购物车项主键)
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product_id: string | number; // 商品ID(唯一标识商品,用于优惠券/活动匹配,必选)
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salePrice: number; // 商品原价(元)
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number: number; // 商品数量
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product_type: GoodsType; // 商品类型
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is_temporary?: boolean; // 是否临时菜(默认false)
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is_gift?: boolean; // 是否赠菜(默认false)
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returnNum?: number; // 退货数量(历史订单用,默认0)
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memberPrice?: number; // 商品会员价(元,优先级:商品会员价 > 会员折扣)
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discountSaleAmount?: number; // 商家改价后单价(元,优先级最高)
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packFee?: number; // 单份打包费(元,默认0)
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packNumber?: number; // 堂食打包数量(默认0)
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activityInfo?: {
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// 商品参与的营销活动(如限时折扣)
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type: ActivityType;
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discountRate: number; // 折扣率(如0.8=8折)
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vipPriceShare: boolean; // 是否与会员优惠同享(默认false)
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};
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skuData?: {
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// SKU扩展数据(可选)
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id: string | number; // SKU ID(唯一标识商品规格,如颜色/尺寸)
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memberPrice?: number; // SKU会员价
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salePrice?: number; // SKU原价
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};
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}
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/** 基础优惠券接口(所有券类型继承,包含统一门槛商品字段) */
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export interface BaseCoupon {
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id: string | number; // 优惠券ID
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type: CouponType; // 工具库字符串枚举(由后端couponType转换)
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name: string; // 对应后端title
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available: boolean; // 基于BackendCoupon字段计算的可用性
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useShopType?: string; // only-仅本店;all-所有门店,custom-指定门店
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useShops: string[]; // 可用门店ID列表
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discountShare: boolean; // 与限时折扣同享:0-否,1-是(后端字段转换为布尔值)
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vipPriceShare: boolean; // 与会员价同享:0-否,1-是(后端字段转换为布尔值)
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useType?: string[]; // 可使用类型:dine堂食/pickup自取/deliv配送/express快递
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isValid: boolean; // 是否在有效期内
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discountAmount?: number; // 减免金额 (满减券有)
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fullAmount?: number; // 使用门槛:满多少金额
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maxDiscountAmount?: number; // 可抵扣最大金额 元
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applicableProductIds: string[]; // 门槛商品ID列表(空数组=全部商品,非空=指定商品ID)
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}
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/** 满减券(适配后端字段) */
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export interface FullReductionCoupon extends BaseCoupon {
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type: CouponType.FULL_REDUCTION;
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fullAmount: number; // 对应后端fullAmount(满减门槛)
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discountAmount: number; // 对应后端discountAmount(减免金额)
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maxDiscountAmount?: number; // 对应后端maxDiscountAmount(最大减免)
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}
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/** 折扣券(适配后端字段) */
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export interface DiscountCoupon extends BaseCoupon {
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type: CouponType.DISCOUNT;
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discountRate: number; // 后端discountRate(%)转小数(如90→0.9)
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maxDiscountAmount: number; // 对应后端maxDiscountAmount(最大减免)
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}
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/** 第二件半价券(适配后端字段) */
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export interface SecondHalfPriceCoupon extends BaseCoupon {
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type: CouponType.SECOND_HALF;
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maxUseCountPerOrder?: number; // 对应后端useLimit(-10086=不限)
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}
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/** 买一送一券(适配后端字段) */
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export interface BuyOneGetOneCoupon extends BaseCoupon {
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type: CouponType.BUY_ONE_GET_ONE;
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maxUseCountPerOrder?: number; // 对应后端useLimit(-10086=不限)
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}
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/** 商品兑换券(适配后端字段) */
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export interface ExchangeCoupon extends BaseCoupon {
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type: CouponType.EXCHANGE;
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deductCount: number; // 对应后端discountNum(抵扣数量)
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sortRule: "low_price_first" | "high_price_first"; // 后端useRule转换
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}
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/** 所有优惠券类型联合 */
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export type Coupon =
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| FullReductionCoupon
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| DiscountCoupon
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| SecondHalfPriceCoupon
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| BuyOneGetOneCoupon
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| ExchangeCoupon;
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/** 营销活动配置(如限时折扣,applicableProductIds为商品ID列表) */
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export interface ActivityConfig {
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type: ActivityType;
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applicableProductIds?: string[]; // 适用商品ID列表(与BaseCartItem.product_id匹配)
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discountRate: number; // 折扣率(如0.8=8折)
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vipPriceShare: boolean; // 是否与会员优惠同享
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}
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/** 积分抵扣规则 */
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export interface PointDeductionRule {
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pointsPerYuan: number; // X积分=1元(如100=100积分抵1元)
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maxDeductionAmount?: number; // 最大抵扣金额(元,默认不限)
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}
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/** 餐位费配置 */
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export interface SeatFeeConfig {
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pricePerPerson: number; // 每人餐位费(元)
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personCount: number; // 用餐人数(默认1)
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isEnabled: boolean; // 是否启用餐位费(默认false)
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}
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/** 商家减免类型枚举 */
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export enum MerchantReductionType {
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FIXED_AMOUNT = "fixed_amount", // 固定金额减免(如直接减 10 元)
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DISCOUNT_RATE = "discount_rate", // 比例折扣减免(如打 9 折,即减免 10%)
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}
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/** 商家减免配置(新增,替代原单一金额字段) */
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export interface MerchantReductionConfig {
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type: MerchantReductionType; // 减免类型(二选一)
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fixedAmount?: number; // 固定减免金额(元,仅 FIXED_AMOUNT 生效,≥0)
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discountRate?: number; // 折扣率(%,仅 DISCOUNT_RATE 生效,0-100,如 90 代表 9 折)
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}
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/** 订单额外费用配置 */
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export interface OrderExtraConfig {
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// merchantReduction: number; // 商家减免金额(元,默认0)
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// 替换原单一金额字段,支持两种减免形式
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merchantReduction: MerchantReductionConfig;
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additionalFee: number; // 附加费(元,如余额充值、券包,默认0)
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pointDeductionRule: PointDeductionRule; // 积分抵扣规则
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seatFeeConfig: SeatFeeConfig; // 餐位费配置
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currentStoreId: string; // 当前门店ID(用于验证优惠券适用门店)
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userPoints: number; // 用户当前积分(用于积分抵扣)
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isMember: boolean; // 用户是否会员(用于会员优惠)
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memberDiscountRate?: number; // 会员折扣率(如0.95=95折,无会员价时用)
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newUserDiscount?: number; // 新用户减免金额(元,默认0)
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}
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/** 订单费用汇总(修改:补充商家减免类型和明细) */
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export interface OrderCostSummary {
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// 商品总件数
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goodsTotal: number;
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totalDiscountAmount: number,
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goodsRealAmount: number; // 商品真实原价总和
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goodsOriginalAmount: number; // 商品原价总和
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goodsDiscountAmount: number; // 商品折扣金额
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couponDeductionAmount: number; // 优惠券总抵扣
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productCouponDeduction: number; // 商品优惠券抵扣
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fullCouponDeduction: number; // 满减优惠券抵扣
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pointDeductionAmount: number; // 积分抵扣金额
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seatFee: number; // 餐位费
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packFee: number; // 打包费
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// 新增:商家减免明细
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merchantReduction: {
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type: MerchantReductionType; // 实际使用的减免类型
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originalConfig: MerchantReductionConfig; // 原始配置(便于前端展示)
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actualAmount: number; // 实际减免金额(计算后的值,≥0)
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};
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additionalFee: number; // 附加费
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finalPayAmount: number; // 最终实付金额
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couponUsed?: Coupon; // 实际使用的优惠券
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pointUsed: number; // 实际使用的积分
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newUserDiscount: number; // 新用户减免金额(元,默认0)
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dinnerType?: "dine-in" | "take-out"; // 就餐类型(堂食/自取/配送/快递)
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config: OrderExtraConfig; // 订单额外费用配置
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//满减活动
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fullReduction: {
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usedActivity?: FullReductionActivity; // 实际使用的满减活动
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usedThreshold?: FullReductionThreshold; // 实际使用的满减阈值(多门槛中选最优)
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actualAmount: number; // 满减实际减免金额(元)
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};
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}
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/** 满减活动阈值(单条满减规则:满X减Y)- 对应 MkDiscountThresholdInsertGroupDefaultGroup */
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export interface FullReductionThreshold {
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activityId?: number; // 关联满减活动ID
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fullAmount?: number; // 满多少金额(元,必填)
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discountAmount?: number; // 减多少金额(元,必填)
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}
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/** 满减活动主表 - 对应 Request 接口(后端真实字段) */
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export interface FullReductionActivity {
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id?: number; // 自增主键(后端字段:id)
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shopId?: number; // 店铺ID(后端字段:shopId)
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status?: number; // 活动状态:1=未开始,2=进行中,3=已结束(后端字段:status)
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sort?: number; // 排序值(越大优先级越高,后端字段:sort)
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createTime?: string; // 创建时间(后端字段:createTime,格式如"2025-10-14 13:56:07")
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updateTime?: string; // 最新修改时间(后端字段:updateTime,用于优先级排序)
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validStartTime?: string; // 有效期开始时间(后端字段:validStartTime,格式如"2025-10-14")
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validEndTime?: string; // 有效期结束时间(后端字段:validEndTime,格式如"2025-12-14")
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useType?: string; // 可使用类型(后端字段:useType,如"dine,pickup,deliv,express")
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useDays?: string; // 可用周期(后端字段:useDays,如"周一,周二,周三,周四,周五,周六,周日")
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useTimeType?: string; // 可用时间段类型(后端字段:useTimeType,all=全时段,custom=指定时段)
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useStartTime?: string; // 每日可用开始时间(后端字段:useStartTime,如"09:00:00",仅custom时有效)
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useEndTime?: string; // 每日可用结束时间(后端字段:useEndTime,如"22:00:00",仅custom时有效)
|
||
couponShare?: number; // 与优惠券同享:0=否,1=是(后端字段:couponShare)
|
||
discountShare?: number; // 与限时折扣同享:0=否,1=是(后端字段:discountShare)
|
||
vipPriceShare?: number; // 与会员价同享:0=否,1=是(后端字段:vipPriceShare)
|
||
pointsShare?: number; // 与积分抵扣同享:0=否,1=是(后端字段:pointsShare)
|
||
thresholds?: FullReductionThreshold[]; // 满减阈值列表(多门槛,后端字段:thresholds)
|
||
isDel?: boolean; // 是否删除:0=否,1=是(后端字段:isDel,默认false)
|
||
}
|
||
|
||
// ============================ 扩展:订单配置与费用汇总(加入后端满减类型) ============================
|
||
/** 扩展订单额外配置:使用后端满减活动类型 */
|
||
export interface OrderExtraConfig {
|
||
// ... 原有字段不变 ...
|
||
fullReductionActivities: FullReductionActivity[]; // 当前店铺的满减活动列表(后端返回结构)
|
||
currentDinnerType: "dine" | "pickup" | "deliv" | "express"; // 当前就餐类型(匹配useType)
|
||
}
|
||
|
||
|
||
|
||
// 辅助枚举:星期映射(用于useDays校验)
|
||
const WEEKDAY_MAP = {
|
||
"周一": 1,
|
||
"周二": 2,
|
||
"周三": 3,
|
||
"周四": 4,
|
||
"周五": 5,
|
||
"周六": 6,
|
||
"周日": 0 // JS中getDay()返回0=周日
|
||
};
|
||
|
||
/**
|
||
* 辅助:校验当前时间是否在活动的「每日可用时段」内
|
||
* @param activity 满减活动
|
||
* @param currentTime 当前时间
|
||
* @returns 是否在时段内
|
||
*/
|
||
function isInDailyTimeRange(activity: FullReductionActivity, currentTime: Date): boolean {
|
||
// 全时段无需校验
|
||
if (activity.useTimeType === "all") return true;
|
||
// 无时段配置则不通过
|
||
if (!activity.useStartTime || !activity.useEndTime) return false;
|
||
|
||
const [startHour, startMinute] = activity.useStartTime.split(":").map(Number);
|
||
const [endHour, endMinute] = activity.useEndTime.split(":").map(Number);
|
||
const currentHour = currentTime.getHours();
|
||
const currentMinute = currentTime.getMinutes();
|
||
|
||
// 转换为分钟数比较
|
||
const startTotalMin = startHour * 60 + startMinute;
|
||
const endTotalMin = endHour * 60 + endMinute;
|
||
const currentTotalMin = currentHour * 60 + currentMinute;
|
||
|
||
// 处理跨天场景(如23:00-02:00)
|
||
if (startTotalMin <= endTotalMin) {
|
||
return currentTotalMin >= startTotalMin && currentTotalMin <= endTotalMin;
|
||
} else {
|
||
return currentTotalMin >= startTotalMin || currentTotalMin <= endTotalMin;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 辅助:校验当前时间是否在活动的「可用周期」内(如周一至周日)
|
||
* @param activity 满减活动
|
||
* @param currentTime 当前时间
|
||
* @returns 是否在周期内
|
||
*/
|
||
function isInWeeklyCycle(activity: FullReductionActivity, currentTime: Date): boolean {
|
||
// 无周期配置则不通过
|
||
if (!activity.useDays) return false;
|
||
const currentWeekday = currentTime.getDay(); // 0=周日,1=周一...6=周六
|
||
const allowedWeekdays = activity.useDays.split(",").map(day => WEEKDAY_MAP[day as keyof typeof WEEKDAY_MAP]);
|
||
return allowedWeekdays.includes(currentWeekday);
|
||
}
|
||
|
||
/**
|
||
* 辅助:校验当前就餐类型是否在活动的「可用类型」内(如堂食/自取)
|
||
* @param activity 满减活动
|
||
* @param currentDinnerType 当前就餐类型
|
||
* @returns 是否匹配
|
||
*/
|
||
function isDinnerTypeMatch(activity: FullReductionActivity, currentDinnerType: string): boolean {
|
||
if (!activity.useType) return false;
|
||
const allowedTypes = activity.useType.split(",");
|
||
return allowedTypes.includes(currentDinnerType);
|
||
}
|
||
/**
|
||
* 筛选最优满减活动(对齐后端逻辑:状态→时间→周期→时段→就餐类型→排序→修改时间)
|
||
* @param activities 后端返回的满减活动列表
|
||
* @param currentShopId 当前店铺ID
|
||
* @param currentDinnerType 当前就餐类型(dine/pickup等)
|
||
* @param currentTime 当前时间(默认当前时间)
|
||
* @returns 最优满减活动(无符合条件则返回undefined)
|
||
*/
|
||
export function filterOptimalFullReductionActivity(
|
||
activities: FullReductionActivity[],
|
||
currentShopId: number,
|
||
currentDinnerType: string,
|
||
currentTime: Date = new Date()
|
||
): FullReductionActivity | undefined {
|
||
if (!activities.length) return undefined;
|
||
|
||
// 第一步:基础筛选(未删除+当前店铺+活动进行中+就餐类型匹配)
|
||
const baseEligible = activities.filter(activity => {
|
||
return (
|
||
activity.isDel !== true && // 未删除
|
||
activity.shopId === currentShopId && // 当前店铺
|
||
activity.status === 2 && // 状态=2(进行中)
|
||
isDinnerTypeMatch(activity, currentDinnerType) && // 就餐类型匹配
|
||
activity.thresholds?.length // 至少有一个满减阈值
|
||
);
|
||
});
|
||
|
||
if (!baseEligible.length) return undefined;
|
||
|
||
// 第二步:时间筛选(有效期内+周期内+时段内)
|
||
const timeEligible = baseEligible.filter(activity => {
|
||
// 1. 校验有效期(validStartTime ~ validEndTime)
|
||
if (!activity.validStartTime || !activity.validEndTime) return false;
|
||
const startDate = new Date(activity.validStartTime);
|
||
const endDate = new Date(activity.validEndTime);
|
||
// 处理有效期结束日期的23:59:59
|
||
endDate.setHours(23, 59, 59, 999);
|
||
if (currentTime < startDate || currentTime > endDate) return false;
|
||
|
||
// 2. 校验可用周期(如周一至周日)
|
||
if (!isInWeeklyCycle(activity, currentTime)) return false;
|
||
|
||
// 3. 校验每日可用时段(如09:00-22:00)
|
||
if (!isInDailyTimeRange(activity, currentTime)) return false;
|
||
|
||
return true;
|
||
});
|
||
|
||
if (!timeEligible.length) return undefined;
|
||
|
||
// 第三步:按优先级排序(需求规则)
|
||
return timeEligible.sort((a, b) => {
|
||
// 1. 先比排序值:排序值大的优先
|
||
if ((a.sort || 0) !== (b.sort || 0)) {
|
||
return (b.sort || 0) - (a.sort || 0);
|
||
}
|
||
// 2. 再比修改时间:最新修改的优先(时间戳降序)
|
||
const aUpdateTime = a.updateTime ? new Date(a.updateTime).getTime() : 0;
|
||
const bUpdateTime = b.updateTime ? new Date(b.updateTime).getTime() : 0;
|
||
return bUpdateTime - aUpdateTime;
|
||
})[0]; // 取最优活动
|
||
}
|
||
/**
|
||
* 折扣率格式化:后端discountRate(%)→ 工具库小数(如90→0.9)
|
||
*/
|
||
export function formatDiscountRate(backendDiscountRate?: number): number {
|
||
if (!backendDiscountRate || backendDiscountRate <= 0) return 1; // 默认无折扣(1=100%)
|
||
// 后端若为百分比(如90=9折),除以100;若已为小数(如0.9)直接返回
|
||
return backendDiscountRate >= 1
|
||
? backendDiscountRate / 100
|
||
: backendDiscountRate;
|
||
}
|
||
|
||
/**
|
||
* 统一小数处理:舍去小数点后两位以后的数字(解决浮点数精度偏差)
|
||
* 如 10.129 → 10.12,1.01 → 1.01,1.0100000001 → 1.01
|
||
* @param num 待处理数字
|
||
* @returns 处理后保留两位小数的数字
|
||
*/
|
||
export function truncateToTwoDecimals(num: number | string): number {
|
||
return new BigNumber(num).decimalPlaces(2, BigNumber.ROUND_DOWN).toNumber();
|
||
}
|
||
|
||
/**
|
||
* 判断商品是否为临时菜(临时菜不参与优惠券门槛和折扣计算)
|
||
* @param goods 商品项
|
||
* @returns 是否临时菜
|
||
*/
|
||
export function isTemporaryGoods(goods: BaseCartItem): boolean {
|
||
return !!goods.is_temporary;
|
||
}
|
||
|
||
/**
|
||
* 判断商品是否为赠菜(赠菜不计入优惠券活动,但计打包费)
|
||
* @param goods 商品项
|
||
* @returns 是否赠菜
|
||
*/
|
||
export function isGiftGoods(goods: BaseCartItem): boolean {
|
||
return !!goods.is_gift;
|
||
}
|
||
|
||
/**
|
||
* 计算单个商品的会员价(优先级:SKU会员价 > 商品会员价 > 会员折扣率)
|
||
* @param goods 商品项
|
||
* @param isMember 是否会员
|
||
* @param memberDiscountRate 会员折扣率(如0.95=95折)
|
||
* @returns 会员价(元)
|
||
*/
|
||
export function calcMemberPrice(
|
||
goods: BaseCartItem,
|
||
isMember: boolean,
|
||
memberDiscountRate?: number
|
||
): number {
|
||
if (!isMember) return truncateToTwoDecimals(goods.salePrice);
|
||
|
||
// 优先级:SKU会员价 > 商品会员价 > 商品原价(无会员价时用会员折扣)
|
||
const basePrice =
|
||
goods.skuData?.memberPrice ?? goods.memberPrice ?? goods.salePrice;
|
||
|
||
// 仅当无SKU会员价、无商品会员价时,才应用会员折扣率
|
||
if (memberDiscountRate && !goods.skuData?.memberPrice && !goods.memberPrice) {
|
||
return truncateToTwoDecimals(
|
||
new BigNumber(basePrice).multipliedBy(memberDiscountRate).toNumber()
|
||
);
|
||
}
|
||
|
||
return truncateToTwoDecimals(basePrice);
|
||
}
|
||
|
||
/**
|
||
* 过滤可参与优惠券计算的商品(排除临时菜、赠菜、已用兑换券的商品)
|
||
* @param goodsList 商品列表
|
||
* @param excludedProductIds 需排除的商品ID列表(商品ID,非购物车ID)
|
||
* @returns 可参与优惠券计算的商品列表
|
||
*/
|
||
export function filterCouponEligibleGoods(
|
||
goodsList: BaseCartItem[],
|
||
excludedProductIds: string[] = []
|
||
): BaseCartItem[] {
|
||
return goodsList.filter(
|
||
(goods) =>
|
||
!isTemporaryGoods(goods) &&
|
||
!isGiftGoods(goods) &&
|
||
!excludedProductIds.includes(String(goods.product_id)) // 核心修正:用商品ID排除
|
||
);
|
||
}
|
||
|
||
/**
|
||
* 统一筛选门槛商品的工具函数(所有券类型复用,按商品ID匹配)
|
||
* @param baseEligibleGoods 基础合格商品(已排除临时菜/赠菜/已抵扣商品)
|
||
* @param applicableProductIds 优惠券指定的门槛商品ID数组
|
||
* @returns 最终参与优惠券计算的商品列表
|
||
*/
|
||
export function filterThresholdGoods(
|
||
baseEligibleGoods: BaseCartItem[],
|
||
applicableProductIds: string[]
|
||
): BaseCartItem[] {
|
||
// 空数组=全部基础合格商品;非空=仅商品ID匹配的商品(转字符串兼容类型)
|
||
return applicableProductIds.length === 0
|
||
? baseEligibleGoods
|
||
: baseEligibleGoods.filter((goods) =>
|
||
applicableProductIds.includes(String(goods.product_id))
|
||
); // 核心修正:用商品ID匹配
|
||
}
|
||
|
||
/**
|
||
* 商品排序(用于商品兑换券:按价格/数量/加入顺序排序,按商品ID分组去重)
|
||
* @param goodsList 商品列表
|
||
* @param sortRule 排序规则(low_price_first/high_price_first)
|
||
* @param cartOrder 商品加入购物车的顺序(key=购物车ID,value=加入时间戳)
|
||
* @returns 排序后的商品列表
|
||
*/
|
||
export function sortGoodsForCoupon(
|
||
goodsList: BaseCartItem[],
|
||
sortRule: "low_price_first" | "high_price_first",
|
||
cartOrder: Record<string, number> = {}
|
||
): BaseCartItem[] {
|
||
return [...goodsList].sort((a, b) => {
|
||
// 1. 按商品单价排序(优先级最高)
|
||
const priceA = a.skuData?.salePrice ?? a.salePrice;
|
||
const priceB = b.skuData?.salePrice ?? b.salePrice;
|
||
if (priceA !== priceB) {
|
||
return sortRule === "low_price_first" ? priceA - priceB : priceB - priceA;
|
||
}
|
||
|
||
// 2. 同价格按商品数量排序(降序,多的优先)
|
||
if (a.number !== b.number) {
|
||
return b.number - a.number;
|
||
}
|
||
|
||
// 3. 同价格同数量按加入购物车顺序(早的优先,用购物车ID匹配)
|
||
const orderA = cartOrder[String(a.id)] ?? Infinity;
|
||
const orderB = cartOrder[String(b.id)] ?? Infinity;
|
||
return orderA - orderB;
|
||
});
|
||
}
|
||
|
||
/**
|
||
* 计算优惠券门槛金额(根据同享规则,按商品ID匹配限时折扣)
|
||
* @param eligibleGoods 可参与优惠券的商品列表(已过滤临时菜/赠菜)
|
||
* @param coupon 优惠券(含discountShare/vipPriceShare配置)
|
||
* @param config 订单配置(会员信息)
|
||
* @param activities 全局营销活动(限时折扣,applicableProductIds为商品ID)
|
||
* @returns 满足优惠券门槛的金额基数
|
||
*/
|
||
export function calcCouponThresholdAmount(
|
||
eligibleGoods: BaseCartItem[],
|
||
coupon: BaseCoupon,
|
||
config: Pick<OrderExtraConfig, "isMember" | "memberDiscountRate">,
|
||
activities: ActivityConfig[] = []
|
||
): number {
|
||
let total = new BigNumber(0);
|
||
|
||
for (const goods of eligibleGoods) {
|
||
const availableNum = Math.max(0, goods.number - (goods.returnNum || 0));
|
||
if (availableNum <= 0) continue;
|
||
|
||
// 1. 基础金额:默认用商品原价(SKU原价优先)
|
||
const basePrice = new BigNumber(
|
||
goods.skuData?.salePrice ?? goods.salePrice
|
||
);
|
||
let itemAmount = basePrice.multipliedBy(availableNum);
|
||
|
||
// 2. 处理「与会员价/会员折扣同享」规则:若开启,用会员价计算
|
||
if (coupon.vipPriceShare) {
|
||
const memberPrice = new BigNumber(
|
||
calcMemberPrice(goods, config.isMember, config.memberDiscountRate)
|
||
);
|
||
itemAmount = memberPrice.multipliedBy(availableNum);
|
||
}
|
||
|
||
// 3. 处理「与限时折扣同享」规则:若开启,叠加限时折扣(按商品ID匹配活动)
|
||
if (coupon.discountShare) {
|
||
const activity =
|
||
goods.activityInfo ??
|
||
activities.find(
|
||
(act) =>
|
||
act.type === ActivityType.TIME_LIMIT_DISCOUNT &&
|
||
(act.applicableProductIds || []).includes(String(goods.product_id)) // 核心修正:用商品ID匹配活动
|
||
);
|
||
|
||
if (activity) {
|
||
itemAmount = itemAmount.multipliedBy(activity.discountRate); // 叠加限时折扣
|
||
}
|
||
}
|
||
|
||
total = total.plus(itemAmount);
|
||
}
|
||
|
||
return truncateToTwoDecimals(total.toNumber());
|
||
}
|
||
|
||
// ============================ 3. 商品核心价格计算(核心修正:按商品ID匹配营销活动) ============================
|
||
/**
|
||
* 计算单个商品的实际单价(整合商家改价、会员优惠、营销活动折扣,按商品ID匹配活动)
|
||
* @param goods 商品项
|
||
* @param config 订单额外配置(含会员、活动信息)
|
||
* @returns 单个商品实际单价(元)
|
||
*/
|
||
export function calcSingleGoodsRealPrice(
|
||
goods: BaseCartItem,
|
||
config: Pick<OrderExtraConfig, "isMember" | "memberDiscountRate"> & {
|
||
activity?: ActivityConfig; // 商品参与的营销活动(如限时折扣,按商品ID匹配)
|
||
}
|
||
): number {
|
||
const { isMember, memberDiscountRate, activity } = config;
|
||
|
||
//如果是增菜价格为0
|
||
if (goods.is_gift) {
|
||
return 0;
|
||
}
|
||
|
||
// 1. 优先级1:商家改价(改价后单价>0才生效)
|
||
if (goods.discountSaleAmount && goods.discountSaleAmount > 0) {
|
||
return truncateToTwoDecimals(goods.discountSaleAmount);
|
||
}
|
||
|
||
// 2. 优先级2:会员价(含会员折扣率,SKU会员价优先)
|
||
const memberPrice = new BigNumber(
|
||
calcMemberPrice(goods, isMember, memberDiscountRate)
|
||
);
|
||
|
||
// 3. 优先级3:营销活动折扣(如限时折扣,需按商品ID匹配活动)
|
||
const isActivityApplicable = activity
|
||
? (activity.applicableProductIds || []).includes(String(goods.product_id)) // 核心修正:用商品ID匹配活动
|
||
: false;
|
||
if (!activity || !isActivityApplicable) {
|
||
return memberPrice.toNumber();
|
||
}
|
||
|
||
// 处理活动与会员的同享/不同享逻辑
|
||
if (activity.vipPriceShare) {
|
||
// 同享:会员价基础上叠加工活动折扣
|
||
return truncateToTwoDecimals(
|
||
memberPrice.multipliedBy(activity.discountRate).toNumber()
|
||
);
|
||
} else {
|
||
// 不同享:取会员价和活动价的最小值(活动价用SKU原价计算)
|
||
const basePriceForActivity = new BigNumber(
|
||
goods.skuData?.salePrice ?? goods.salePrice
|
||
);
|
||
const activityPrice = basePriceForActivity.multipliedBy(
|
||
activity.discountRate
|
||
);
|
||
|
||
return truncateToTwoDecimals(
|
||
memberPrice.isLessThanOrEqualTo(activityPrice)
|
||
? memberPrice.toNumber()
|
||
: activityPrice.toNumber()
|
||
);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 计算商品原价总和(所有商品:原价*数量,含临时菜、赠菜,用SKU原价优先)
|
||
* @param goodsList 商品列表
|
||
* @returns 商品原价总和(元)
|
||
*/
|
||
export function calcGoodsOriginalAmount(goodsList: BaseCartItem[]): number {
|
||
let total = new BigNumber(0);
|
||
|
||
for (const goods of goodsList) {
|
||
const availableNum = Math.max(0, goods.number - (goods.returnNum || 0));
|
||
let basePrice = new BigNumber(0);
|
||
if (goods.is_temporary) {
|
||
basePrice = new BigNumber(goods?.discountSaleAmount ?? 0);
|
||
} else if (goods.is_gift) {
|
||
basePrice = new BigNumber(0);
|
||
}
|
||
else {
|
||
basePrice = new BigNumber(
|
||
goods.skuData?.salePrice ?? goods.salePrice
|
||
); // SKU原价优先
|
||
}
|
||
|
||
total = total.plus(basePrice.multipliedBy(availableNum));
|
||
}
|
||
|
||
return truncateToTwoDecimals(total.toNumber());
|
||
}
|
||
|
||
/**
|
||
* 计算商品实际总价(所有商品:实际单价*数量,含临时菜、赠菜,按商品ID匹配活动)
|
||
* @param goodsList 商品列表
|
||
* @param config 订单额外配置(含会员、活动信息)
|
||
* @param activities 全局营销活动列表(如限时折扣,applicableProductIds为商品ID)
|
||
* @returns 商品实际总价(元)
|
||
*/
|
||
export function calcGoodsRealAmount(
|
||
goodsList: BaseCartItem[],
|
||
config: Pick<OrderExtraConfig, "isMember" | "memberDiscountRate">,
|
||
activities: ActivityConfig[] = []
|
||
): number {
|
||
let total = new BigNumber(0);
|
||
|
||
for (const goods of goodsList) {
|
||
const availableNum = Math.max(0, goods.number - (goods.returnNum || 0));
|
||
if (availableNum <= 0) continue;
|
||
|
||
// 匹配商品参与的营销活动(按商品ID匹配,优先商品自身配置)
|
||
const activity =
|
||
goods.activityInfo ??
|
||
activities.find(
|
||
(act) =>
|
||
(act.applicableProductIds || []).includes(String(goods.product_id)) // 核心修正:用商品ID匹配活动
|
||
);
|
||
|
||
const realPrice = new BigNumber(
|
||
calcSingleGoodsRealPrice(goods, { ...config, activity })
|
||
);
|
||
total = total.plus(realPrice.multipliedBy(availableNum));
|
||
}
|
||
|
||
return truncateToTwoDecimals(total.toNumber());
|
||
}
|
||
|
||
/**
|
||
* 计算商品折扣总金额(商品原价总和 - 商品实际总价)
|
||
* @param goodsOriginalAmount 商品原价总和
|
||
* @param goodsRealAmount 商品实际总价
|
||
* @returns 商品折扣总金额(元,≥0)
|
||
*/
|
||
export function calcGoodsDiscountAmount(
|
||
goodsOriginalAmount: number,
|
||
goodsRealAmount: number
|
||
): number {
|
||
const original = new BigNumber(goodsOriginalAmount);
|
||
const real = new BigNumber(goodsRealAmount);
|
||
const discount = original.minus(real);
|
||
|
||
return truncateToTwoDecimals(Math.max(0, discount.toNumber()));
|
||
}
|
||
/**
|
||
* 从满减活动的多门槛中,选择最优阈值(满金额最小且减免金额最大)
|
||
* @param thresholds 满减阈值列表(多门槛)
|
||
* @param baseAmount 满减计算基数(新客立减后的金额)
|
||
* @param goodsOriginalAmount 商品原价总和(discountShare=0时用)
|
||
* @param goodsRealAmount 商品折扣后总和(discountShare=1时用)
|
||
* @param discountShare 与限时折扣同享:0=否,1=是
|
||
* @returns 最优阈值(无符合条件则返回undefined)
|
||
*/
|
||
export function selectOptimalThreshold(
|
||
thresholds: FullReductionThreshold[] = [],
|
||
baseAmount: number,
|
||
goodsOriginalAmount: number,
|
||
goodsRealAmount: number,
|
||
discountShare: number = 0
|
||
): FullReductionThreshold | undefined {
|
||
if (!thresholds.length) return undefined;
|
||
|
||
// 第一步:确定满减门槛基数(根据discountShare规则)
|
||
const thresholdBase = discountShare === 1
|
||
? new BigNumber(goodsRealAmount) // 与限时折扣同享→用折扣后金额
|
||
: new BigNumber(goodsOriginalAmount); // 不同享→用原价
|
||
|
||
// 第二步:筛选「满金额≤基数」且「减免金额>0」的有效阈值
|
||
const validThresholds = thresholds.filter(threshold => {
|
||
const fullAmount = new BigNumber(threshold.fullAmount || 0);
|
||
const discountAmount = new BigNumber(threshold.discountAmount || 0);
|
||
return fullAmount.isLessThanOrEqualTo(thresholdBase) && discountAmount.isGreaterThan(0);
|
||
});
|
||
|
||
if (!validThresholds.length) return undefined;
|
||
|
||
// 第三步:选择最优阈值(优先级:1.满金额最小 → 2.减免金额最大)
|
||
return validThresholds.sort((a, b) => {
|
||
const aFull = new BigNumber(a.fullAmount || 0);
|
||
const bFull = new BigNumber(b.fullAmount || 0);
|
||
const aDiscount = new BigNumber(a.discountAmount || 0);
|
||
const bDiscount = new BigNumber(b.discountAmount || 0);
|
||
|
||
// 先比满金额:越小越优先(满1减10 比 满100减20 更优)
|
||
if (!aFull.isEqualTo(bFull)) {
|
||
return aFull.comparedTo(bFull) || 0; // Ensure a number is always returned
|
||
}
|
||
// 再比减免金额:越大越优先
|
||
return bDiscount.comparedTo(aDiscount) || 0; // Ensure a number is always returned
|
||
})[0];
|
||
}
|
||
|
||
/**
|
||
* 计算满减实际减免金额(适配多门槛、同享规则)
|
||
* @param optimalActivity 最优满减活动
|
||
* @param optimalThreshold 最优满减阈值
|
||
* @param baseAmount 计算基数(新客立减后的金额)
|
||
* @returns 实际减免金额(元,未达门槛则0)
|
||
*/
|
||
export function calcFullReductionAmount(
|
||
baseAmount: number,
|
||
optimalActivity?: FullReductionActivity,
|
||
optimalThreshold?: FullReductionThreshold,
|
||
): number {
|
||
if (!optimalActivity || !optimalThreshold) return 0;
|
||
|
||
const baseAmountBn = new BigNumber(baseAmount);
|
||
const discountAmountBn = new BigNumber(optimalThreshold.discountAmount || 0);
|
||
|
||
// 1. 基数必须为正(避免减免后为负)
|
||
if (baseAmountBn.isLessThanOrEqualTo(0)) return 0;
|
||
|
||
// 2. 减免金额不能超过基数(避免减成负数)
|
||
const maxReducible = baseAmountBn;
|
||
const actualReduction = discountAmountBn.isLessThanOrEqualTo(maxReducible)
|
||
? discountAmountBn
|
||
: maxReducible;
|
||
|
||
return truncateToTwoDecimals(actualReduction.toNumber());
|
||
}
|
||
|
||
|
||
// ------------------------------ 策略辅助函数 ------------------------------
|
||
/**
|
||
* 根据优惠券useShops列表判断门店是否匹配(适配BaseCoupon的useShops字段)
|
||
*/
|
||
function isStoreMatchByList(
|
||
useShops: string[],
|
||
currentStoreId: string
|
||
): boolean {
|
||
// 适用门店为空数组 → 无限制(所有门店适用)
|
||
if (useShops.length === 0) return true;
|
||
// 匹配当前门店ID(字符串比较,避免类型问题)
|
||
return useShops.includes(currentStoreId);
|
||
}
|
||
|
||
|
||
|
||
/**
|
||
* 计算优惠券抵扣金额(处理互斥逻辑,选择最优优惠券,按商品ID排除,新增细分统计)
|
||
* @param backendCoupons 后端优惠券列表
|
||
* @param goodsList 商品列表
|
||
* @param config 订单配置(含就餐类型)
|
||
* @returns 最优优惠券的抵扣结果(含商品券/满减券细分)
|
||
*/
|
||
export function calcCouponDeduction(
|
||
backendCoupons: BackendCoupon[],
|
||
goodsList: BaseCartItem[],
|
||
config: Pick<
|
||
OrderExtraConfig,
|
||
"currentStoreId" | "isMember" | "memberDiscountRate"
|
||
> & {
|
||
activities: ActivityConfig[];
|
||
cartOrder: Record<string, number>;
|
||
dinnerType: "dine-in" | "take-out";
|
||
currentTime?: Date;
|
||
}
|
||
): {
|
||
deductionAmount: number;
|
||
productCouponDeduction: number; // 新增:商品优惠券抵扣(兑换券/折扣券/买一送一等)
|
||
fullCouponDeduction: number; // 新增:满减优惠券抵扣
|
||
usedCoupon?: Coupon;
|
||
excludedProductIds: string[]; // 排除的商品ID列表(商品ID)
|
||
} {
|
||
const goodsCoupon = backendCoupons.filter((v) => v.type == 2);
|
||
const discountCoupon = backendCoupons.filter((v) => v.type != 2);
|
||
|
||
// 3. 计算非兑换券最优抵扣(传递已抵扣商品ID,避免重复,统计细分字段)
|
||
let nonExchangeResult: CouponResult = {
|
||
deductionAmount: discountCoupon.reduce((prve, cur): number => {
|
||
return prve + (cur.discountAmount || 0);
|
||
}, 0),
|
||
excludedProductIds: [],
|
||
usedCoupon: undefined,
|
||
productCouponDeduction: 0,
|
||
fullCouponDeduction: 0,
|
||
};
|
||
|
||
// 4. 计算兑换券抵扣(排除非兑换券已抵扣的商品ID,统计商品券细分)
|
||
let exchangeResult: ExchangeCalculationResult = {
|
||
deductionAmount: goodsCoupon.reduce((prve, cur): number => {
|
||
return prve + (cur.discountAmount || 0);
|
||
}, 0),
|
||
excludedProductIds: [],
|
||
productCouponDeduction: 0,
|
||
};
|
||
|
||
// 5. 汇总结果:兑换券与非兑换券不可同时使用,取抵扣金额大的
|
||
const exchangeBn = new BigNumber(exchangeResult.deductionAmount);
|
||
const nonExchangeBn = new BigNumber(nonExchangeResult.deductionAmount);
|
||
const isExchangeBetter = exchangeBn.isGreaterThan(nonExchangeBn);
|
||
|
||
return {
|
||
deductionAmount: exchangeBn.plus(nonExchangeBn).toNumber(),
|
||
productCouponDeduction: exchangeResult.deductionAmount,
|
||
fullCouponDeduction: nonExchangeResult.deductionAmount, // 兑换券与满减券互斥,满减券抵扣置0
|
||
usedCoupon: isExchangeBetter ? undefined : nonExchangeResult.usedCoupon,
|
||
excludedProductIds: isExchangeBetter
|
||
? exchangeResult.excludedProductIds
|
||
: nonExchangeResult.excludedProductIds,
|
||
};
|
||
}
|
||
|
||
// ============================ 5. 其他费用计算(无ID依赖,逻辑不变) ============================
|
||
/**
|
||
* 计算总打包费(赠菜也计算,称重商品打包数量≤1)
|
||
* @param goodsList 商品列表
|
||
* @param dinnerType 就餐类型(堂食dine-in/外卖take-out)
|
||
* @returns 总打包费(元)
|
||
*/
|
||
export function calcTotalPackFee(
|
||
goodsList: BaseCartItem[],
|
||
dinnerType: "dine-in" | "take-out"
|
||
): number {
|
||
// if (dinnerType !== "take-out") return 0;
|
||
let total = new BigNumber(0);
|
||
|
||
for (const goods of goodsList) {
|
||
const packNumber = goods.packNumber ? goods.packNumber * 1 : 0;
|
||
let availableNum = Math.max(0, goods.number - (goods.returnNum || 0));
|
||
availableNum = Math.min(availableNum, packNumber);
|
||
|
||
if (availableNum === 0) continue;
|
||
|
||
// 计算单个商品打包数量(外卖全打包,堂食按配置,称重商品≤1)
|
||
let packNum = availableNum;
|
||
if (goods.product_type === GoodsType.WEIGHT) {
|
||
packNum = Math.min(packNum, 1);
|
||
}
|
||
|
||
total = total.plus(new BigNumber(goods.packFee || 0).multipliedBy(packNum));
|
||
}
|
||
|
||
return truncateToTwoDecimals(total.toNumber());
|
||
}
|
||
|
||
/**
|
||
* 计算餐位费(按人数,不参与营销活动)
|
||
* @param config 餐位费配置
|
||
* @returns 餐位费(元,未启用则0)
|
||
*/
|
||
export function calcSeatFee(config: SeatFeeConfig): number {
|
||
if (!config.isEnabled || config.personCount == 0) return 0;
|
||
const personCount = Math.max(1, config.personCount); // 至少1人
|
||
return truncateToTwoDecimals(
|
||
new BigNumber(config.pricePerPerson).multipliedBy(personCount).toNumber()
|
||
);
|
||
}
|
||
|
||
/**
|
||
* 计算积分抵扣金额(按X积分=1元,不超过最大抵扣和用户积分)
|
||
* @param userPoints 用户当前积分
|
||
* @param rule 积分抵扣规则
|
||
* @param maxDeductionLimit 最大抵扣上限(通常为订单金额,避免超扣)
|
||
* @returns 积分抵扣金额 + 实际使用积分
|
||
*/
|
||
export function calcPointDeduction(
|
||
userPoints: number,
|
||
rule: PointDeductionRule,
|
||
maxDeductionLimit: number
|
||
): {
|
||
deductionAmount: number;
|
||
usedPoints: number;
|
||
} {
|
||
if (rule.pointsPerYuan <= 0 || userPoints <= 0) {
|
||
return { deductionAmount: 0, usedPoints: 0 };
|
||
}
|
||
|
||
const userPointsBn = new BigNumber(userPoints);
|
||
const pointsPerYuanBn = new BigNumber(rule.pointsPerYuan);
|
||
const maxLimitBn = new BigNumber(maxDeductionLimit);
|
||
|
||
// 最大可抵扣金额(积分可抵金额 vs 规则最大 vs 订单上限)
|
||
const maxDeductByPoints = userPointsBn.dividedBy(pointsPerYuanBn);
|
||
const maxDeductAmount = maxDeductByPoints.isLessThan(
|
||
rule.maxDeductionAmount ?? Infinity
|
||
)
|
||
? maxDeductByPoints
|
||
: new BigNumber(rule.maxDeductionAmount || Infinity).isLessThan(maxLimitBn)
|
||
? maxDeductByPoints
|
||
: maxLimitBn;
|
||
|
||
// 实际使用积分 = 抵扣金额 * 积分兑换比例
|
||
const usedPoints = maxDeductAmount.multipliedBy(pointsPerYuanBn);
|
||
|
||
return {
|
||
deductionAmount: truncateToTwoDecimals(maxDeductAmount.toNumber()),
|
||
usedPoints: truncateToTwoDecimals(
|
||
Math.min(usedPoints.toNumber(), userPoints)
|
||
), // 避免积分超扣
|
||
};
|
||
}
|
||
|
||
// ============================ 6. 订单总费用汇总与实付金额计算(核心入口,补充细分字段) ============================
|
||
/**
|
||
* 计算订单所有费用子项并汇总(核心入口函数)
|
||
* @param goodsList 购物车商品列表
|
||
* @param dinnerType 就餐类型
|
||
* @param backendCoupons 后端优惠券列表
|
||
* @param activities 全局营销活动列表
|
||
* @param config 订单额外配置(会员、积分、餐位费等)
|
||
* @param cartOrder 商品加入购物车顺序(key=购物车ID,value=时间戳)
|
||
* @param currentTime 当前时间(用于优惠券有效期判断)
|
||
* @returns 订单费用汇总(含所有子项和实付金额,新增商品券/满减券细分)
|
||
*/
|
||
export function calculateOrderCostSummary(
|
||
goodsList: BaseCartItem[],
|
||
dinnerType: "dine-in" | "take-out", // 前端就餐类型
|
||
backendCoupons: BackendCoupon[] = [],
|
||
activities: ActivityConfig[] = [],
|
||
config: OrderExtraConfig, // 含后端满减活动、currentDinnerType
|
||
cartOrder: Record<string, number> = {},
|
||
currentTime: Date = new Date()
|
||
): OrderCostSummary {
|
||
// ------------------------------ 1. 基础费用计算 ------------------------------
|
||
const goodsOriginalAmount = calcGoodsOriginalAmount(goodsList); // 商品原价总和
|
||
const goodsRealAmount = calcGoodsRealAmount( // 商品折扣后总和
|
||
goodsList,
|
||
{ isMember: config.isMember, memberDiscountRate: config.memberDiscountRate },
|
||
activities
|
||
);
|
||
const goodsDiscountAmount = calcGoodsDiscountAmount(goodsOriginalAmount, goodsRealAmount); // 商品折扣金额
|
||
const newUserDiscount = config.newUserDiscount || 0; // 新客立减
|
||
|
||
// ------------------------------ 2. 满减活动计算(核心步骤) ------------------------------
|
||
let usedFullReductionActivity: FullReductionActivity | undefined;
|
||
let usedFullReductionThreshold: FullReductionThreshold | undefined;
|
||
let fullReductionAmount = 0;
|
||
|
||
// 2.1 筛选最优满减活动(后端活动列表、当前店铺、就餐类型、时间)
|
||
usedFullReductionActivity = filterOptimalFullReductionActivity(
|
||
config.fullReductionActivities,
|
||
Number(config.currentStoreId), // 转换为数字(后端shopId是number)
|
||
config.currentDinnerType, // 后端useType匹配的就餐类型(如"dine")
|
||
currentTime
|
||
);
|
||
|
||
// 2.2 计算满减基数(先扣新客立减)
|
||
const baseAfterNewUserDiscount = new BigNumber(goodsRealAmount)
|
||
.minus(newUserDiscount)
|
||
.isGreaterThan(0)
|
||
? new BigNumber(goodsRealAmount).minus(newUserDiscount).toNumber()
|
||
: 0;
|
||
|
||
// 2.3 选择最优满减阈值(多门槛场景)
|
||
if (usedFullReductionActivity) {
|
||
usedFullReductionThreshold = selectOptimalThreshold(
|
||
usedFullReductionActivity.thresholds,
|
||
baseAfterNewUserDiscount,
|
||
goodsOriginalAmount,
|
||
goodsRealAmount,
|
||
usedFullReductionActivity.discountShare || 0 // 与限时折扣同享规则
|
||
);
|
||
|
||
// 2.4 计算满减实际减免金额
|
||
fullReductionAmount = calcFullReductionAmount(
|
||
baseAfterNewUserDiscount,
|
||
usedFullReductionActivity,
|
||
usedFullReductionThreshold,
|
||
);
|
||
}
|
||
|
||
// ------------------------------ 3. 优惠券抵扣(适配满减同享规则) ------------------------------
|
||
let couponDeductionAmount = 0;
|
||
let productCouponDeduction = 0;
|
||
let fullCouponDeduction = 0;
|
||
let usedCoupon: Coupon | undefined;
|
||
let excludedProductIds: string[] = [];
|
||
|
||
// 若满减与优惠券同享(couponShare=1),才计算优惠券;否则优惠券抵扣为0
|
||
if (usedFullReductionActivity?.couponShare === 1) {
|
||
const couponResult = calcCouponDeduction( // 原有优惠券计算函数
|
||
backendCoupons,
|
||
goodsList,
|
||
{
|
||
currentStoreId: config.currentStoreId,
|
||
isMember: config.isMember,
|
||
memberDiscountRate: config.memberDiscountRate,
|
||
activities,
|
||
cartOrder,
|
||
dinnerType,
|
||
currentTime
|
||
}
|
||
);
|
||
couponDeductionAmount = couponResult.deductionAmount;
|
||
productCouponDeduction = couponResult.productCouponDeduction;
|
||
fullCouponDeduction = couponResult.fullCouponDeduction;
|
||
usedCoupon = couponResult.usedCoupon;
|
||
excludedProductIds = couponResult.excludedProductIds;
|
||
}
|
||
|
||
// ------------------------------ 4. 积分抵扣(适配满减同享规则) ------------------------------
|
||
let pointDeductionAmount = 0;
|
||
let usedPoints = 0;
|
||
|
||
// 计算积分抵扣基数(商品折扣后 - 新客立减 - 满减 - 优惠券)
|
||
const maxPointDeductionLimit = new BigNumber(goodsRealAmount)
|
||
.minus(newUserDiscount)
|
||
.minus(fullReductionAmount)
|
||
.minus(couponDeductionAmount)
|
||
.isGreaterThan(0)
|
||
? new BigNumber(goodsRealAmount).minus(newUserDiscount).minus(fullReductionAmount).minus(couponDeductionAmount).toNumber()
|
||
: 0;
|
||
|
||
// 若满减与积分同享(pointsShare=1),才计算积分;否则积分抵扣为0
|
||
if ((usedFullReductionActivity?.pointsShare === 1) && maxPointDeductionLimit > 0) {
|
||
const pointResult = calcPointDeduction(
|
||
config.userPoints,
|
||
config.pointDeductionRule,
|
||
maxPointDeductionLimit
|
||
);
|
||
pointDeductionAmount = pointResult.deductionAmount;
|
||
usedPoints = pointResult.usedPoints;
|
||
}
|
||
|
||
// ------------------------------ 5. 其他费用计算(原有逻辑不变) ------------------------------
|
||
const packFee = calcTotalPackFee(goodsList, dinnerType); // 打包费
|
||
let seatFee = calcSeatFee(config.seatFeeConfig); // 餐位费
|
||
seatFee = dinnerType === "dine-in" ? seatFee : 0; // 外卖不收餐位费
|
||
const additionalFee = Math.max(0, config.additionalFee); // 附加费
|
||
|
||
// 商家减免计算(原有逻辑不变)
|
||
const merchantReductionConfig = config.merchantReduction;
|
||
let merchantReductionActualAmount = 0;
|
||
const maxMerchantReductionLimit = new BigNumber(goodsRealAmount)
|
||
.minus(newUserDiscount)
|
||
.minus(fullReductionAmount)
|
||
.minus(couponDeductionAmount)
|
||
.minus(pointDeductionAmount)
|
||
.plus(seatFee)
|
||
.plus(packFee)
|
||
.isGreaterThan(0)
|
||
? new BigNumber(goodsRealAmount).minus(newUserDiscount).minus(fullReductionAmount).minus(couponDeductionAmount).minus(pointDeductionAmount).plus(seatFee).plus(packFee).toNumber()
|
||
: 0;
|
||
|
||
switch (merchantReductionConfig.type) {
|
||
case MerchantReductionType.FIXED_AMOUNT:
|
||
merchantReductionActualAmount = Math.min(
|
||
merchantReductionConfig.fixedAmount || 0,
|
||
maxMerchantReductionLimit
|
||
);
|
||
break;
|
||
case MerchantReductionType.DISCOUNT_RATE:
|
||
const validRate = Math.max(0, Math.min(100, merchantReductionConfig.discountRate || 0)) / 100;
|
||
merchantReductionActualAmount = maxMerchantReductionLimit * (1 - validRate);
|
||
break;
|
||
}
|
||
merchantReductionActualAmount = Math.max(0, truncateToTwoDecimals(merchantReductionActualAmount));
|
||
|
||
// ------------------------------ 6. 最终实付金额计算 ------------------------------
|
||
const finalPayAmountBn = new BigNumber(goodsRealAmount)
|
||
.minus(newUserDiscount)
|
||
.minus(fullReductionAmount)
|
||
.minus(couponDeductionAmount)
|
||
.minus(pointDeductionAmount)
|
||
.minus(merchantReductionActualAmount)
|
||
.plus(seatFee)
|
||
.plus(packFee)
|
||
.plus(additionalFee);
|
||
const finalPayAmount = Math.max(0, truncateToTwoDecimals(finalPayAmountBn.toNumber()));
|
||
|
||
// ------------------------------ 7. 总优惠金额计算 ------------------------------
|
||
const totalDiscountAmount = truncateToTwoDecimals(
|
||
new BigNumber(goodsDiscountAmount)
|
||
.plus(newUserDiscount)
|
||
.plus(fullReductionAmount)
|
||
.plus(couponDeductionAmount)
|
||
.plus(pointDeductionAmount)
|
||
.plus(merchantReductionActualAmount)
|
||
.toNumber()
|
||
);
|
||
// 积分可抵扣最大金额
|
||
|
||
// ------------------------------ 8. 返回完整结果 ------------------------------
|
||
return {
|
||
goodsTotal: goodsList.reduce((sum, g) => sum + Math.max(0, g.number - (g.returnNum || 0)), 0),
|
||
goodsRealAmount,
|
||
goodsOriginalAmount,
|
||
goodsDiscountAmount,
|
||
couponDeductionAmount,
|
||
productCouponDeduction,
|
||
fullCouponDeduction,
|
||
pointDeductionAmount,
|
||
seatFee,
|
||
packFee,
|
||
totalDiscountAmount,
|
||
// 满减活动明细(后端字段)
|
||
fullReduction: {
|
||
usedActivity: usedFullReductionActivity,
|
||
usedThreshold: usedFullReductionThreshold,
|
||
actualAmount: truncateToTwoDecimals(fullReductionAmount)
|
||
},
|
||
merchantReduction: {
|
||
type: merchantReductionConfig.type,
|
||
originalConfig: merchantReductionConfig,
|
||
actualAmount: merchantReductionActualAmount
|
||
},
|
||
additionalFee,
|
||
finalPayAmount,
|
||
couponUsed: usedCoupon,
|
||
pointUsed: usedPoints,
|
||
newUserDiscount,
|
||
dinnerType,
|
||
config
|
||
};
|
||
}
|
||
|
||
export function isWeightGoods(goods: BaseCartItem): boolean {
|
||
return goods.product_type === GoodsType.WEIGHT;
|
||
}
|
||
|
||
// ============================ 7. 对外暴露工具库 ============================
|
||
export const OrderPriceCalculator = {
|
||
// 基础工具
|
||
truncateToTwoDecimals,
|
||
isTemporaryGoods,
|
||
isGiftGoods,
|
||
formatDiscountRate,
|
||
filterThresholdGoods,
|
||
isWeightGoods,
|
||
// 商品价格计算
|
||
calcSingleGoodsRealPrice,
|
||
calcGoodsOriginalAmount,
|
||
calcGoodsRealAmount,
|
||
calcGoodsDiscountAmount,
|
||
//满减活动工具
|
||
filterOptimalFullReductionActivity,
|
||
// 优惠券计算
|
||
calcCouponDeduction,
|
||
// 其他费用计算
|
||
calcTotalPackFee,
|
||
calcSeatFee,
|
||
calcPointDeduction,
|
||
// 核心入口
|
||
calculateOrderCostSummary,
|
||
// 枚举导出
|
||
Enums: {
|
||
GoodsType,
|
||
CouponType,
|
||
ActivityType,
|
||
WEEKDAY_MAP,
|
||
},
|
||
};
|
||
|
||
export default OrderPriceCalculator;
|