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

packages/server/src/services/Sales/Estimates/DeleteSaleEstimate.ts

@@ -0,0 +1,74 @@
+import { Inject, Service } from 'typedi';
+import { ServiceError } from '@/exceptions';
+import {
+  ISaleEstimateDeletedPayload,
+  ISaleEstimateDeletingPayload,
+} from '@/interfaces';
+import events from '@/subscribers/events';
+import { ERRORS } from './constants';
+import HasTenancyService from '@/services/Tenancy/TenancyService';
+import { EventPublisher } from '@/lib/EventPublisher/EventPublisher';
+import UnitOfWork from '@/services/UnitOfWork';
+import { Knex } from 'knex';
+
+@Service()
+export class DeleteSaleEstimate {
+  @Inject()
+  private tenancy: HasTenancyService;
+
+  @Inject()
+  private eventPublisher: EventPublisher;
+
+  @Inject()
+  private uow: UnitOfWork;
+
+  /**
+   * Deletes the given estimate id with associated entries.
+   * @async
+   * @param {number} tenantId - The tenant id.
+   * @param {IEstimate} estimateId
+   * @return {void}
+   */
+  public async deleteEstimate(
+    tenantId: number,
+    estimateId: number
+  ): Promise<void> {
+    const { SaleEstimate, ItemEntry } = this.tenancy.models(tenantId);
+
+    // Retrieve sale estimate or throw not found service error.
+    const oldSaleEstimate = await SaleEstimate.query()
+      .findById(estimateId)
+      .throwIfNotFound();
+
+    // Throw error if the sale estimate converted to sale invoice.
+    if (oldSaleEstimate.convertedToInvoiceId) {
+      throw new ServiceError(ERRORS.SALE_ESTIMATE_CONVERTED_TO_INVOICE);
+    }
+    // Deletes the estimate with associated transactions under UOW enivrement.
+    return this.uow.withTransaction(tenantId, async (trx: Knex.Transaction) => {
+      // Triggers `onSaleEstimatedDeleting` event.
+      await this.eventPublisher.emitAsync(events.saleEstimate.onDeleting, {
+        trx,
+        tenantId,
+        oldSaleEstimate,
+      } as ISaleEstimateDeletingPayload);
+
+      // Delete sale estimate entries.
+      await ItemEntry.query(trx)
+        .where('reference_id', estimateId)
+        .where('reference_type', 'SaleEstimate')
+        .delete();
+
+      // Delete sale estimate transaction.
+      await SaleEstimate.query(trx).where('id', estimateId).delete();
+
+      // Triggers `onSaleEstimatedDeleted` event.
+      await this.eventPublisher.emitAsync(events.saleEstimate.onDeleted, {
+        tenantId,
+        saleEstimateId: estimateId,
+        oldSaleEstimate,
+        trx,
+      } as ISaleEstimateDeletedPayload);
+    });
+  }
+}