feat(nestjs): migrate to NestJS

packages/server/src/modules/Customers/queries/GetCustomer.service.ts

@@ -0,0 +1,30 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { CustomerTransfromer } from './CustomerTransformer';
+import { TransformerInjectable } from '@/modules/Transformer/TransformerInjectable.service';
+import { Customer } from '../models/Customer';
+import { TenantModelProxy } from '@/modules/System/models/TenantBaseModel';
+
+@Injectable()
+export class GetCustomerService {
+  constructor(
+    private transformer: TransformerInjectable,
+
+    @Inject(Customer.name)
+    private customerModel: TenantModelProxy<typeof Customer>,
+  ) {}
+
+  /**
+   * Retrieve the given customer details.
+   * @param {number} customerId
+   */
+  public async getCustomer(customerId: number) {
+    // Retrieve the customer model or throw not found error.
+    const customer = await this.customerModel()
+      .query()
+      .findById(customerId)
+      .throwIfNotFound();
+
+    // Retrieves the transformered customers.
+    return this.transformer.transform(customer, new CustomerTransfromer());
+  }
+}