feat(nestjs): migrate to NestJS

packages/server/src/modules/SaleEstimates/commands/DeleteSaleEstimate.service.ts

@@ -0,0 +1,75 @@
+import { Inject, Injectable } from '@nestjs/common';
+import {
+  ISaleEstimateDeletedPayload,
+  ISaleEstimateDeletingPayload,
+} from '../types/SaleEstimates.types';
+import { ERRORS } from '../constants';
+import { Knex } from 'knex';
+import { SaleEstimate } from '../models/SaleEstimate';
+import { UnitOfWork } from '@/modules/Tenancy/TenancyDB/UnitOfWork.service';
+import { EventEmitter2 } from '@nestjs/event-emitter';
+import { events } from '@/common/events/events';
+import { ServiceError } from '@/modules/Items/ServiceError';
+import { ItemEntry } from '@/modules/TransactionItemEntry/models/ItemEntry';
+import { TenantModelProxy } from '@/modules/System/models/TenantBaseModel';
+
+@Injectable()
+export class DeleteSaleEstimate {
+  constructor(
+    @Inject(SaleEstimate.name)
+    private readonly saleEstimateModel: TenantModelProxy<typeof SaleEstimate>,
+
+    @Inject(ItemEntry.name)
+    private readonly itemEntryModel: TenantModelProxy<typeof ItemEntry>,
+
+    private readonly eventPublisher: EventEmitter2,
+    private readonly uow: UnitOfWork,
+  ) {}
+
+  /**
+   * Deletes the given estimate id with associated entries.
+   * @async
+   * @param {number} estimateId
+   * @return {Promise<void>}
+   */
+  public async deleteEstimate(estimateId: number): Promise<void> {
+    // Retrieve sale estimate or throw not found service error.
+    const oldSaleEstimate = await this.saleEstimateModel()
+      .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);
+    }
+    // Updates the estimate with associated transactions under UOW enivrement.
+    return this.uow.withTransaction(async (trx: Knex.Transaction) => {
+      // Triggers `onSaleEstimatedDeleting` event.
+      await this.eventPublisher.emitAsync(events.saleEstimate.onDeleting, {
+        trx,
+        oldSaleEstimate,
+      } as ISaleEstimateDeletingPayload);
+
+      // Delete sale estimate entries.
+      await this.itemEntryModel()
+        .query(trx)
+        .where('reference_id', estimateId)
+        .where('reference_type', 'SaleEstimate')
+        .delete();
+
+      // Delete sale estimate transaction.
+      await this.saleEstimateModel()
+        .query(trx)
+        .where('id', estimateId)
+        .delete();
+
+      // Triggers `onSaleEstimatedDeleted` event.
+      await this.eventPublisher.emitAsync(events.saleEstimate.onDeleted, {
+        saleEstimateId: estimateId,
+        oldSaleEstimate,
+        trx,
+      } as ISaleEstimateDeletedPayload);
+    });
+  }
+}