feat(server): wip tax rates service

packages/server/src/services/TaxRates/CreateTaxRate.ts

@@ -0,0 +1,53 @@
+import { Knex } from 'knex';
+import {
+  ICreateTaxRateDTO,
+  ITaxRateCreatedPayload,
+  ITaxRateCreatingPayload,
+} from '@/interfaces';
+import UnitOfWork from '../UnitOfWork';
+import { EventPublisher } from '@/lib/EventPublisher/EventPublisher';
+import HasTenancyService from '../Tenancy/TenancyService';
+import { Inject, Service } from 'typedi';
+import events from '@/subscribers/events';
+
+@Service()
+export class CreateTaxRate {
+  @Inject()
+  private tenancy: HasTenancyService;
+
+  @Inject()
+  private eventPublisher: EventPublisher;
+
+  @Inject()
+  private uow: UnitOfWork;
+
+  /**
+   * Creates a new tax rate.
+   * @param {number} tenantId
+   * @param {ICreateTaxRateDTO} createTaxRateDTO
+   */
+  public createTaxRate(tenantId: number, createTaxRateDTO: ICreateTaxRateDTO) {
+    const { TaxRate } = this.tenancy.models(tenantId);
+
+    return this.uow.withTransaction(tenantId, async (trx: Knex.Transaction) => {
+      // Triggers `onTaxRateCreating` event.
+      await this.eventPublisher.emitAsync(events.taxRates.onCreating, {
+        createTaxRateDTO,
+        tenantId,
+        trx,
+      } as ITaxRateCreatingPayload);
+
+      const taxRate = await TaxRate.query(trx).insert({ ...createTaxRateDTO });
+
+      // Triggers `onTaxRateCreated` event.
+      await this.eventPublisher.emitAsync(events.taxRates.onCreated, {
+        createTaxRateDTO,
+        taxRate,
+        tenantId,
+        trx,
+      } as ITaxRateCreatedPayload);
+
+      return taxRate;
+    });
+  }
+}