feat(nestjs): migrate to NestJS

packages/server/src/modules/BankingTransactions/commands/DeleteCashflowTransaction.service.ts

@@ -0,0 +1,87 @@
+import { Knex } from 'knex';
+import { ERRORS } from '../constants';
+import { EventEmitter2 } from '@nestjs/event-emitter';
+import { Inject, Injectable } from '@nestjs/common';
+import { BankTransaction } from '../models/BankTransaction';
+import { BankTransactionLine } from '../models/BankTransactionLine';
+import { UnitOfWork } from '@/modules/Tenancy/TenancyDB/UnitOfWork.service';
+import { ServiceError } from '@/modules/Items/ServiceError';
+import { events } from '@/common/events/events';
+import {
+  ICommandCashflowDeletedPayload,
+  ICommandCashflowDeletingPayload,
+} from '../types/BankingTransactions.types';
+import { TenantModelProxy } from '@/modules/System/models/TenantBaseModel';
+
+@Injectable()
+export class DeleteCashflowTransaction {
+  constructor(
+    private readonly uow: UnitOfWork,
+    private readonly eventEmitter: EventEmitter2,
+
+    @Inject(BankTransaction.name)
+    private readonly bankTransaction: TenantModelProxy<typeof BankTransaction>,
+
+    @Inject(BankTransactionLine.name)
+    private readonly bankTransactionLine: TenantModelProxy<
+      typeof BankTransactionLine
+    >,
+  ) {}
+
+  /**
+   * Deletes the cashflow transaction with associated journal entries.
+   * @param {number} tenantId -
+   * @param {number} userId - User id.
+   */
+  public deleteCashflowTransaction = async (
+    cashflowTransactionId: number,
+    trx?: Knex.Transaction,
+  ): Promise<BankTransaction> => {
+    // Retrieve the cashflow transaction.
+    const oldCashflowTransaction = await this.bankTransaction()
+      .query()
+      .findById(cashflowTransactionId);
+    // Throw not found error if the given transaction id not found.
+    this.throwErrorIfTransactionNotFound(oldCashflowTransaction);
+
+    // Starting database transaction.
+    return this.uow.withTransaction(async (trx: Knex.Transaction) => {
+      // Triggers `onCashflowTransactionDelete` event.
+      await this.eventEmitter.emitAsync(events.cashflow.onTransactionDeleting, {
+        trx,
+        oldCashflowTransaction,
+      } as ICommandCashflowDeletingPayload);
+
+      // Delete cashflow transaction associated lines first.
+      await this.bankTransactionLine()
+        .query(trx)
+        .where('cashflow_transaction_id', cashflowTransactionId)
+        .delete();
+
+      // Delete cashflow transaction.
+      await this.bankTransaction()
+        .query(trx)
+        .findById(cashflowTransactionId)
+        .delete();
+
+      // Triggers `onCashflowTransactionDeleted` event.
+      await this.eventEmitter.emitAsync(events.cashflow.onTransactionDeleted, {
+        trx,
+        cashflowTransactionId,
+        oldCashflowTransaction,
+      } as ICommandCashflowDeletedPayload);
+
+      return oldCashflowTransaction;
+    }, trx);
+  };
+
+  /**
+   * Throw not found error if the given transaction id not found.
+   * @param transaction
+   */
+  private throwErrorIfTransactionNotFound(transaction) {
+    if (!transaction) {
+      throw new ServiceError(ERRORS.CASHFLOW_TRANSACTION_NOT_FOUND);
+    }
+  }
+}