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

packages/server/src/services/Purchases/BillPayments/CommandBillPaymentDTOTransformer.ts

@@ -0,0 +1,37 @@
+import { Inject, Service } from 'typedi';
+import * as R from 'ramda';
+import { sumBy } from 'lodash';
+import { IBillPayment, IBillPaymentDTO, IVendor } from '@/interfaces';
+import { BranchTransactionDTOTransform } from '@/services/Branches/Integrations/BranchTransactionDTOTransform';
+import { formatDateFields } from '@/utils';
+
+@Service()
+export class CommandBillPaymentDTOTransformer {
+  @Inject()
+  private branchDTOTransform: BranchTransactionDTOTransform;
+
+  /**
+   * Transforms create/edit DTO to model.
+   * @param {number} tenantId
+   * @param {IBillPaymentDTO} billPaymentDTO - Bill payment.
+   * @param {IBillPayment} oldBillPayment - Old bill payment.
+   * @return {Promise<IBillPayment>}
+   */
+  public async transformDTOToModel(
+    tenantId: number,
+    billPaymentDTO: IBillPaymentDTO,
+    vendor: IVendor,
+    oldBillPayment?: IBillPayment
+  ): Promise<IBillPayment> {
+    const initialDTO = {
+      ...formatDateFields(billPaymentDTO, ['paymentDate']),
+      amount: sumBy(billPaymentDTO.entries, 'paymentAmount'),
+      currencyCode: vendor.currencyCode,
+      exchangeRate: billPaymentDTO.exchangeRate || 1,
+      entries: billPaymentDTO.entries,
+    };
+    return R.compose(
+      this.branchDTOTransform.transformDTO<IBillPayment>(tenantId)
+    )(initialDTO);
+  }
+}