refactor: branches and warehouses to nestjs

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

@@ -0,0 +1,55 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { Knex } from 'knex';
+import {
+  IBranchCreatedPayload,
+  IBranchCreatePayload,
+  ICreateBranchDTO,
+} from '../Branches.types';
+import { BranchCommandValidator } from './BranchCommandValidator.service';
+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';
+
+@Injectable()
+export class CreateBranchService {
+  constructor(
+    private readonly uow: UnitOfWork,
+    private readonly eventPublisher: EventEmitter2,
+    private readonly validator: BranchCommandValidator,
+
+    @Inject(Branch.name)
+    private readonly branchModel: typeof Branch,
+  ) {}
+
+  /**
+   * Creates a new branch.
+   * @param {ICreateBranchDTO} createBranchDTO
+   * @returns {Promise<IBranch>}
+   */
+  public createBranch = async (
+    createBranchDTO: ICreateBranchDTO,
+  ): 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;
+    });
+  };
+}