feat(nestjs): migrate to NestJS

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

@@ -0,0 +1,82 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { Knex } from 'knex';
+import { EventEmitter2 } from '@nestjs/event-emitter';
+import {
+  IWarehouseDeletedPayload,
+  IWarehouseDeletePayload,
+} from '../Warehouse.types';
+import { WarehouseValidator } from './WarehouseValidator.service';
+import { ERRORS } from '../contants';
+import { Warehouse } from '../models/Warehouse.model';
+import { UnitOfWork } from '@/modules/Tenancy/TenancyDB/UnitOfWork.service';
+import { events } from '@/common/events/events';
+import { TenantModelProxy } from '@/modules/System/models/TenantBaseModel';
+
+@Injectable()
+export class DeleteWarehouseService {
+  /**
+   * @param {UnitOfWork} uow - Unit of work.
+   * @param {EventEmitter2} eventPublisher - Event emitter.
+   * @param {WarehouseValidator} validator - Warehouse command validator.
+   * @param {typeof Warehouse} warehouseModel - Warehouse model.
+   */
+  constructor(
+    private readonly uow: UnitOfWork,
+    private readonly eventPublisher: EventEmitter2,
+    private readonly validator: WarehouseValidator,
+
+    @Inject(Warehouse.name)
+    private readonly warehouseModel: TenantModelProxy<typeof Warehouse>,
+  ) {}
+
+  /**
+   * Validates the given warehouse before deleting.
+   * @param   {number} warehouseId
+   * @returns {Promise<void>}
+   */
+  public authorize = async (warehouseId: number): Promise<void> => {
+    await this.validator.validateWarehouseNotOnlyWarehouse(warehouseId);
+  };
+
+  /**
+   * Deletes specific warehouse.
+   * @param   {number} warehouseId
+   * @returns {Promise<void>}
+   */
+  public deleteWarehouse = async (warehouseId: number): Promise<void> => {
+    // Retrieves the old warehouse or throw not found service error.
+    const oldWarehouse = await this.warehouseModel()
+      .query()
+      .findById(warehouseId)
+      .throwIfNotFound();
+    // .queryAndThrowIfHasRelations({
+    //   type: ERRORS.WAREHOUSE_HAS_ASSOCIATED_TRANSACTIONS,
+    // });
+
+    // Validates the given warehouse before deleting.
+    await this.authorize(warehouseId);
+
+    // Creates a new warehouse under unit-of-work.
+    return this.uow.withTransaction(async (trx: Knex.Transaction) => {
+      const eventPayload = {
+        warehouseId,
+        oldWarehouse,
+        trx,
+      } as IWarehouseDeletePayload | IWarehouseDeletedPayload;
+
+      // Triggers `onWarehouseCreate`.
+      await this.eventPublisher.emitAsync(
+        events.warehouse.onDelete,
+        eventPayload,
+      );
+      // Deletes the given warehouse from the storage.
+      await this.warehouseModel().query().findById(warehouseId).delete();
+
+      // Triggers `onWarehouseCreated`.
+      await this.eventPublisher.emitAsync(
+        events.warehouse.onDeleted,
+        eventPayload as IWarehouseDeletedPayload,
+      );
+    });
+  };
+}