update: the danak services module and add new route to fetch the danak service

src/modules/discounts/repositories/discounts.repository.ts

@@ -0,0 +1,72 @@
+import { Injectable } from "@nestjs/common";
+import { InjectRepository } from "@nestjs/typeorm";
+import { Repository } from "typeorm";
+
+import { Discount } from "../entities/discount.entity";
+
+@Injectable()
+export class DiscountRepository extends Repository<Discount> {
+  constructor(@InjectRepository(Discount) repository: Repository<Discount>) {
+    super(repository.target, repository.manager, repository.queryRunner);
+  }
+
+  async findById(id: string): Promise<Discount | null> {
+    return this.findOne({
+      where: { id },
+      relations: ["productRelations"],
+    });
+  }
+
+  async findByCode(code: string): Promise<Discount | null> {
+    return this.findOne({
+      where: { code },
+      relations: ["productRelations"],
+    });
+  }
+
+  async findActiveByCode(code: string): Promise<Discount | null> {
+    return this.findOne({
+      where: {
+        code,
+        isActive: true,
+      },
+      relations: ["productRelations"],
+    });
+  }
+
+  async findAll(options?: any): Promise<[Discount[], number]> {
+    const query = this.createQueryBuilder("discount").leftJoinAndSelect("discount.productRelations", "productRelations");
+
+    if (options?.status) {
+      query.andWhere("discount.status = :status", { status: options.status });
+    }
+
+    if (options?.isActive !== undefined) {
+      query.andWhere("discount.isActive = :isActive", { isActive: options.isActive });
+    }
+
+    if (options?.search) {
+      query.andWhere("(discount.title ILIKE :search OR discount.code ILIKE :search)", {
+        search: `%${options.search}%`,
+      });
+    }
+
+    if (options?.productId) {
+      query.andWhere("EXISTS (SELECT 1 FROM discount_product dp WHERE dp.discountId = discount.id AND dp.productId = :productId)", {
+        productId: options.productId,
+      });
+    }
+
+    if (options?.sort) {
+      const [field, order] = options.sort.split(",");
+      query.orderBy(`discount.${field}`, order.toUpperCase());
+    } else {
+      query.orderBy("discount.createdAt", "DESC");
+    }
+
+    return query
+      .skip(options?.skip || 0)
+      .take(options?.take || 10)
+      .getManyAndCount();
+  }
+}