feat(nestjs): migrate to NestJS

packages/server/src/modules/Branches/commands/CreateBranch.service.ts

@@ -0,0 +1,57 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { Knex } from 'knex';
+import { IBranchCreatedPayload, IBranchCreatePayload } from '../Branches.types';
+import { UnitOfWork } from '../../Tenancy/TenancyDB/UnitOfWork.service';
+import { EventEmitter2 } from '@nestjs/event-emitter';
+import { Branch } from '../models/Branch.model';
+import { events } from '@/common/events/events';
+import { TenantModelProxy } from '@/modules/System/models/TenantBaseModel';
+import { CreateBranchDto } from '../dtos/Branch.dto';
+
+@Injectable()
+export class CreateBranchService {
+  /**
+   * @param {UnitOfWork} uow - Unit of Work for tenant database transactions.
+   * @param {EventEmitter2} eventPublisher - Event emitter for publishing branch creation events.
+   * @param {typeof Branch} branchModel - The Branch model class for database operations.
+   */
+  constructor(
+    private readonly uow: UnitOfWork,
+    private readonly eventPublisher: EventEmitter2,
+
+    @Inject(Branch.name)
+    private readonly branchModel: TenantModelProxy<typeof Branch>,
+  ) {}
+
+  /**
+   * Creates a new branch.
+   * @param {CreateBranchDto} createBranchDTO
+   * @returns {Promise<Branch>}
+   */
+  public createBranch = async (
+    createBranchDTO: CreateBranchDto,
+  ): Promise<Branch> => {
+    // Creates a new branch under unit-of-work.
+    return this.uow.withTransaction(async (trx: Knex.Transaction) => {
+      // Triggers `onBranchCreate` event.
+      await this.eventPublisher.emitAsync(events.warehouse.onEdit, {
+        createBranchDTO,
+        trx,
+      } as IBranchCreatePayload);
+
+      const branch = await this.branchModel()
+        .query()
+        .insertAndFetch({
+          ...createBranchDTO,
+        });
+      // Triggers `onBranchCreated` event.
+      await this.eventPublisher.emitAsync(events.warehouse.onEdited, {
+        createBranchDTO,
+        branch,
+        trx,
+      } as IBranchCreatedPayload);
+
+      return branch;
+    });
+  };
+}