系统判断配送限制

packages/domain/src/index.test.ts

@@ -3,6 +3,8 @@ import {
   calcBenefitAmount,
   calcRedeemSettleAmount,
   calcLogisticsFeeByBottles,
+  calcOrderBoxCount,
+  shouldHoldAutoCourierDispatch,
   validateMinPurchase,
   validateRedeemAmount,
   allocateBenefitCoupons,
@@ -99,6 +101,15 @@ describe('calcLogisticsFeeByBottles', () => {
   });
 });
 
+describe('shouldHoldAutoCourierDispatch', () => {
+  it('holds at 10 full boxes (60 bottles)', () => {
+    expect(shouldHoldAutoCourierDispatch(59)).toBe(false);
+    expect(shouldHoldAutoCourierDispatch(60)).toBe(true);
+    expect(shouldHoldAutoCourierDispatch(66)).toBe(true);
+    expect(calcOrderBoxCount(60)).toBe(10);
+  });
+});
+
 describe('allocateBenefitCoupons', () => {
   const coupons = [
     { id: '1', balance: 300, createdAt: 1 },

packages/domain/src/index.ts

@@ -95,6 +95,30 @@ export function calcRedeemSettleAmount(amount: number, settlementRate: number):
   return Math.round(amount * settlementRate * 100) / 100;
 }
 
+/** 箱规默认瓶数（跨城起购 / 物流计价 / 大单拦截） */
+export const BOTTLES_PER_BOX = 6;
+
+/** 小飞侠自动推单上限箱数：达到该箱数起拦截，需总部确认后推单或自配送 */
+export const XFX_AUTO_DISPATCH_MAX_BOXES = 10;
+
+/** 按箱规向上取整得到箱数 */
+export function calcOrderBoxCount(quantity: number, bottlesPerBox = BOTTLES_PER_BOX): number {
+  const qty = Math.floor(Number(quantity) || 0);
+  if (qty <= 0 || !(bottlesPerBox > 0)) return 0;
+  return Math.ceil(qty / bottlesPerBox);
+}
+
+/** 是否因大单拦截自动推承运商（默认 ≥10 箱 = 60 瓶） */
+export function shouldHoldAutoCourierDispatch(
+  quantity: number,
+  options?: { bottlesPerBox?: number; maxBoxes?: number },
+): boolean {
+  const bottlesPerBox = options?.bottlesPerBox ?? BOTTLES_PER_BOX;
+  const maxBoxes = options?.maxBoxes ?? XFX_AUTO_DISPATCH_MAX_BOXES;
+  const qty = Math.floor(Number(quantity) || 0);
+  return qty >= bottlesPerBox * maxBoxes;
+}
+
 /** 物流（快递）按瓶计价规则，如小飞侠：2瓶6元、加一瓶+2元、6瓶一箱14元 */
 export type LogisticsPricingRule = {
   baseBottles: number;