refactor: split the services to multiple service classes (#202)

packages/server/src/services/Sales/Invoices/DeliverSaleInvoice.ts

@@ -0,0 +1,77 @@
+import { Knex } from 'knex';
+import moment from 'moment';
+import { ServiceError } from '@/exceptions';
+import {
+  ISaleInvoiceDeliveringPayload,
+  ISaleInvoiceEventDeliveredPayload,
+  ISystemUser,
+} from '@/interfaces';
+import { ERRORS } from './constants';
+import { Inject, Service } from 'typedi';
+import { EventPublisher } from '@/lib/EventPublisher/EventPublisher';
+import UnitOfWork from '@/services/UnitOfWork';
+import events from '@/subscribers/events';
+import HasTenancyService from '@/services/Tenancy/TenancyService';
+import { CommandSaleInvoiceValidators } from './CommandSaleInvoiceValidators';
+
+@Service()
+export class DeliverSaleInvoice {
+  @Inject()
+  private tenancy: HasTenancyService;
+
+  @Inject()
+  private eventPublisher: EventPublisher;
+
+  @Inject()
+  private uow: UnitOfWork;
+
+  @Inject()
+  private validators: CommandSaleInvoiceValidators;
+
+  /**
+   * Deliver the given sale invoice.
+   * @param  {number} tenantId - Tenant id.
+   * @param  {number} saleInvoiceId - Sale invoice id.
+   * @return {Promise<void>}
+   */
+  public async deliverSaleInvoice(
+    tenantId: number,
+    saleInvoiceId: number,
+    authorizedUser: ISystemUser
+  ): Promise<void> {
+    const { SaleInvoice } = this.tenancy.models(tenantId);
+
+    // Retrieve details of the given sale invoice id.
+    const oldSaleInvoice = await SaleInvoice.query().findById(saleInvoiceId);
+
+    // Validates the given invoice existance.
+    this.validators.validateInvoiceExistance(oldSaleInvoice);
+
+    // Throws error in case the sale invoice already published.
+    if (oldSaleInvoice.isDelivered) {
+      throw new ServiceError(ERRORS.SALE_INVOICE_ALREADY_DELIVERED);
+    }
+    // Update sale invoice transaction with assocaite transactions
+    // under unit-of-work envirement.
+    return this.uow.withTransaction(tenantId, async (trx: Knex.Transaction) => {
+      // Triggers `onSaleInvoiceDelivering` event.
+      await this.eventPublisher.emitAsync(events.saleInvoice.onDelivering, {
+        tenantId,
+        oldSaleInvoice,
+        trx,
+      } as ISaleInvoiceDeliveringPayload);
+
+      // Record the delivered at on the storage.
+      const saleInvoice = await SaleInvoice.query(trx)
+        .where({ id: saleInvoiceId })
+        .update({ deliveredAt: moment().toMySqlDateTime() });
+
+      // Triggers `onSaleInvoiceDelivered` event.
+      await this.eventPublisher.emitAsync(events.saleInvoice.onDelivered, {
+        tenantId,
+        saleInvoiceId,
+        saleInvoice,
+      } as ISaleInvoiceEventDeliveredPayload);
+    });
+  }
+}