feat(ADM-018): completed feature

project/src/modules/promotions/domain/ports.ts

@@ -0,0 +1,18 @@
+import type { NewPromotion, Promotion, PromotionDiscount } from './promotion.js';
+
+export interface PromotionService {
+  create(input: NewPromotion): Promise<Promotion>;
+  calculateDiscount(code: string, cartTotalCents: number, now?: Date): Promise<PromotionDiscount>;
+  validateCode(code: string, now?: Date): Promise<Promotion>;
+  list(): Promise<Promotion[]>;
+  update(code: string, patch: Partial<NewPromotion>): Promise<Promotion>;
+  delete(code: string): Promise<void>;
+}
+
+export interface PromotionRepository {
+  findByCode(code: string): Promise<Promotion | undefined>;
+  create(input: NewPromotion): Promise<Promotion>;
+  findAll(): Promise<Promotion[]>;
+  update(code: string, patch: Partial<NewPromotion>): Promise<Promotion>;
+  delete(code: string): Promise<void>;
+}