refactor: tax rates to nestjs

2026-02-20 06:40:31 +00:00 · 2024-12-20 12:24:50 +02:00
parent 1f32a7c59a
commit 330192c042
29 changed files with 1631 additions and 0 deletions
--- a/packages/server-nest/src/modules/TaxRates/commands/EditTaxRate.service.ts
+++ b/packages/server-nest/src/modules/TaxRates/commands/EditTaxRate.service.ts
@@ -0,0 +1,108 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { Knex } from 'knex';
+import { omit } from 'lodash';
+import {
+  IEditTaxRateDTO,
+  ITaxRateEditedPayload,
+  ITaxRateEditingPayload,
+} from '../TaxRates.types';
+import { CommandTaxRatesValidators } from './CommandTaxRatesValidator.service';
+import { TaxRateModel } from '../models/TaxRate.model';
+import { UnitOfWork } from '@/modules/Tenancy/TenancyDB/UnitOfWork.service';
+import { events } from '@/common/events/events';
+import { EventEmitter2 } from '@nestjs/event-emitter';
+
+@Injectable()
+export class EditTaxRateService {
+  constructor(
+    private readonly eventEmitter: EventEmitter2,
+    private readonly uow: UnitOfWork,
+    private readonly validators: CommandTaxRatesValidators,
+
+    @Inject(TaxRateModel.name)
+    private readonly taxRateModel: typeof TaxRateModel,
+  ) {}
+
+  /**
+   * Detarmines whether the tax rate, name or code have been changed.
+   * @param {ITaxRate} taxRate
+   * @param {IEditTaxRateDTO} editTaxRateDTO
+   * @returns {boolean}
+   */
+  private isTaxRateDTOChanged = (
+    taxRate: TaxRateModel,
+    editTaxRateDTO: IEditTaxRateDTO
+  ) => {
+    return (
+      taxRate.rate !== editTaxRateDTO.rate ||
+      taxRate.name !== editTaxRateDTO.name ||
+      taxRate.code !== editTaxRateDTO.code
+    );
+  };
+
+  /**
+   * Edits the given tax rate or creates a new if the rate or name have been changed.
+   * @param {number} tenantId
+   * @param {ITaxRate} oldTaxRate
+   * @param {IEditTaxRateDTO} editTaxRateDTO
+   * @param {Knex.Transaction} trx
+   * @returns {Promise<ITaxRate>}
+   */
+  private async editTaxRateOrCreate(
+    oldTaxRate: TaxRateModel,
+    editTaxRateDTO: IEditTaxRateDTO,
+    trx?: Knex.Transaction
+  ) {
+    const isTaxDTOChanged = this.isTaxRateDTOChanged(
+      oldTaxRate,
+      editTaxRateDTO
+    );
+    if (isTaxDTOChanged) {
+      // Soft deleting the old tax rate.
+      await this.taxRateModel.query(trx).findById(oldTaxRate.id).delete();
+
+      // Create a new tax rate with new edited data.
+      return this.taxRateModel.query(trx).insertAndFetch({
+        ...omit(oldTaxRate, ['id']),
+        ...editTaxRateDTO,
+      });
+    } else {
+      return this.taxRateModel.query(trx).patchAndFetchById(oldTaxRate.id, {
+        ...editTaxRateDTO,
+      });
+    }
+  }
+
+  public async editTaxRate(
+    taxRateId: number,
+    editTaxRateDTO: IEditTaxRateDTO
+  ) {
+    const oldTaxRate = await this.taxRateModel.query().findById(taxRateId);
+
+    // Validates the tax rate existance.
+    this.validators.validateTaxRateExistance(oldTaxRate);
+
+    return this.uow.withTransaction(async (trx: Knex.Transaction) => {
+      // Triggers `onTaxRateEditing` event.
+      await this.eventEmitter.emitAsync(events.taxRates.onEditing, {
+        editTaxRateDTO,
+        trx,
+      } as ITaxRateEditingPayload);
+
+      const taxRate = await this.editTaxRateOrCreate(
+        oldTaxRate,
+        editTaxRateDTO,
+        trx
+      );
+      // Triggers `onTaxRateEdited` event.
+      await this.eventEmitter.emitAsync(events.taxRates.onEdited, {
+        editTaxRateDTO,
+        oldTaxRate,
+        taxRate,
+        trx,
+      } as ITaxRateEditedPayload);
+
+      return taxRate;
+    });
+  }
+}