feat(nestjs): migrate to NestJS

packages/server/src/modules/Vendors/commands/DeleteVendor.service.ts

@@ -0,0 +1,60 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { Knex } from 'knex';
+import { EventEmitter2 } from '@nestjs/event-emitter';
+import { UnitOfWork } from '@/modules/Tenancy/TenancyDB/UnitOfWork.service';
+import { Vendor } from '../models/Vendor';
+import { events } from '@/common/events/events';
+import {
+  IVendorEventDeletedPayload,
+  IVendorEventDeletingPayload,
+} from '../types/Vendors.types';
+import { TenantModelProxy } from '@/modules/System/models/TenantBaseModel';
+
+@Injectable()
+export class DeleteVendorService {
+  /**
+   * @param {EventEmitter2} eventPublisher - Event emitter service.
+   * @param {UnitOfWork} uow - Unit of work service.
+   * @param {typeof Vendor} contactModel - Vendor model.
+   */
+  constructor(
+    private eventPublisher: EventEmitter2,
+    private uow: UnitOfWork,
+    @Inject(Vendor.name) private vendorModel: TenantModelProxy<typeof Vendor>,
+  ) {}
+
+  /**
+   * Deletes the given vendor.
+   * @param  {number} vendorId
+   * @return {Promise<void>}
+   */
+  public async deleteVendor(vendorId: number) {
+    // Retrieves the old vendor or throw not found service error.
+    const oldVendor = await this.vendorModel()
+      .query()
+      .findById(vendorId)
+      .throwIfNotFound();
+    // .queryAndThrowIfHasRelations({
+    //   type: ERRORS.VENDOR_HAS_TRANSACTIONS,
+    // });
+
+    // Triggers `onVendorDeleting` event.
+    await this.eventPublisher.emitAsync(events.vendors.onDeleting, {
+      vendorId,
+      oldVendor,
+    } as IVendorEventDeletingPayload);
+
+    // Deletes vendor contact under unit-of-work.
+    return this.uow.withTransaction(async (trx: Knex.Transaction) => {
+      // Deletes the vendor contact from the storage.
+      await this.vendorModel().query(trx).findById(vendorId).delete();
+
+      // Triggers `onVendorDeleted` event.
+      await this.eventPublisher.emitAsync(events.vendors.onDeleted, {
+        vendorId,
+        oldVendor,
+        trx,
+      } as IVendorEventDeletedPayload);
+    });
+  }
+}