refactor: wip to nestjs

packages/server-nest/src/modules/Vendors/commands/CreateVendor.service.ts

@@ -0,0 +1,62 @@
+import { Knex } from 'knex';
+import { Inject, Injectable } from '@nestjs/common';
+import { UnitOfWork } from '@/modules/Tenancy/TenancyDB/UnitOfWork.service';
+import { EventEmitter2 } from '@nestjs/event-emitter';
+import { Vendor } from '../models/Vendor';
+import { events } from '@/common/events/events';
+import {
+  IVendorEventCreatedPayload,
+  IVendorEventCreatingPayload,
+  IVendorNewDTO,
+} from '../types/Vendors.types';
+import { CreateEditVendorDTOService } from './CreateEditVendorDTO';
+
+@Injectable()
+export class CreateVendorService {
+  /**
+   * @param {UnitOfWork} uow - Unit of work service.
+   * @param {EventEmitter2} eventPublisher - Event emitter service.
+   * @param {CreateEditVendorDTOService} transformDTO - Create edit vendor DTO service.
+   * @param {typeof Vendor} vendorModel - Vendor model.
+   */
+  constructor(
+    private readonly uow: UnitOfWork,
+    private readonly eventPublisher: EventEmitter2,
+    private readonly transformDTO: CreateEditVendorDTOService,
+
+    @Inject(Vendor.name)
+    private readonly vendorModel: typeof Vendor,
+  ) {}
+
+  /**
+   * Creates a new vendor.
+   * @param  {IVendorNewDTO} vendorDTO
+   * @return {Promise<void>}
+   */
+  public async createVendor(vendorDTO: IVendorNewDTO, trx?: Knex.Transaction) {
+    // Transforms create DTO to customer object.
+    const vendorObject = await this.transformDTO.transformCreateDTO(vendorDTO);
+
+    // Creates vendor contact under unit-of-work environment.
+    return this.uow.withTransaction(async (trx: Knex.Transaction) => {
+      // Triggers `onVendorCreating` event.
+      await this.eventPublisher.emitAsync(events.vendors.onCreating, {
+        vendorDTO,
+        trx,
+      } as IVendorEventCreatingPayload);
+
+      // Creates a new contact as vendor.
+      const vendor = await this.vendorModel.query(trx).insertAndFetch({
+        ...vendorObject,
+      });
+      // Triggers `onVendorCreated` event.
+      await this.eventPublisher.emitAsync(events.vendors.onCreated, {
+        vendorId: vendor.id,
+        vendor,
+        trx,
+      } as IVendorEventCreatedPayload);
+
+      return vendor;
+    }, trx);
+  }
+}