feat(nestjs): migrate to NestJS

packages/server/src/modules/Warehouses/commands/CreateWarehouse.service.ts

@@ -0,0 +1,76 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { Knex } from 'knex';
+import {
+  IWarehouseCreatedPayload,
+  IWarehouseCreatePayload,
+} from '../Warehouse.types';
+import { WarehouseValidator } from './WarehouseValidator.service';
+import { Warehouse } from '../models/Warehouse.model';
+import { UnitOfWork } from '@/modules/Tenancy/TenancyDB/UnitOfWork.service';
+import { EventEmitter2 } from '@nestjs/event-emitter';
+import { events } from '@/common/events/events';
+import { TenantModelProxy } from '@/modules/System/models/TenantBaseModel';
+import { CreateWarehouseDto } from '../dtos/Warehouse.dto';
+
+@Injectable()
+export class CreateWarehouse {
+  /**
+   * @param {UnitOfWork} uow - Unit of work.
+   * @param {EventEmitter2} eventEmitter - Event emitter.
+   * @param {WarehouseValidator} validator - Warehouse command validator.
+   * @param {typeof Warehouse} warehouseModel - Warehouse model.
+   */
+  constructor(
+    private readonly uow: UnitOfWork,
+    private readonly eventEmitter: EventEmitter2,
+    private readonly validator: WarehouseValidator,
+
+    @Inject(Warehouse.name)
+    private readonly warehouseModel: TenantModelProxy<typeof Warehouse>,
+  ) {}
+
+  /**
+   * Authorize the warehouse before creating.
+   * @param {ICreateWarehouseDTO} warehouseDTO -
+   */
+  public authorize = async (warehouseDTO: CreateWarehouseDto) => {
+    if (warehouseDTO.code) {
+      await this.validator.validateWarehouseCodeUnique(warehouseDTO.code);
+    }
+  };
+
+  /**
+   * Creates a new warehouse on the system.
+   * @param {ICreateWarehouseDTO} warehouseDTO
+   */
+  public createWarehouse = async (
+    warehouseDTO: CreateWarehouseDto,
+  ): Promise<Warehouse> => {
+    // Authorize warehouse before creating.
+    await this.authorize(warehouseDTO);
+
+    return this.uow.withTransaction(async (trx: Knex.Transaction) => {
+      // Triggers `onWarehouseCreate` event.
+      await this.eventEmitter.emitAsync(events.warehouse.onEdit, {
+        warehouseDTO,
+        trx,
+      } as IWarehouseCreatePayload);
+
+      // Creates a new warehouse on the storage.
+      const warehouse = await this.warehouseModel()
+        .query(trx)
+        .insertAndFetch({
+          ...warehouseDTO,
+        });
+
+      // Triggers `onWarehouseCreated` event.
+      await this.eventEmitter.emitAsync(events.warehouse.onCreated, {
+        warehouseDTO,
+        warehouse,
+        trx,
+      } as IWarehouseCreatedPayload);
+
+      return warehouse;
+    });
+  };
+}