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

packages/server/src/services/Sales/Invoices/CommandSaleInvoiceValidators.ts

@@ -0,0 +1,86 @@
+import { Inject, Service } from 'typedi';
+import HasTenancyService from '@/services/Tenancy/TenancyService';
+import { ServiceError } from '@/exceptions';
+import { SaleInvoice } from '@/models';
+import { ERRORS } from './constants';
+
+@Service()
+export class CommandSaleInvoiceValidators {
+  @Inject()
+  private tenancy: HasTenancyService;
+
+  /**
+   * Validates the given invoice is existance.
+   * @param {SaleInvoice | undefined} invoice
+   */
+  public validateInvoiceExistance(invoice: SaleInvoice | undefined) {
+    if (!invoice) {
+      throw new ServiceError(ERRORS.SALE_INVOICE_NOT_FOUND);
+    }
+  }
+
+  /**
+   * Validate whether sale invoice number unqiue on the storage.
+   */
+  public async validateInvoiceNumberUnique(
+    tenantId: number,
+    invoiceNumber: string,
+    notInvoiceId?: number
+  ) {
+    const { SaleInvoice } = this.tenancy.models(tenantId);
+
+    const saleInvoice = await SaleInvoice.query()
+      .findOne('invoice_no', invoiceNumber)
+      .onBuild((builder) => {
+        if (notInvoiceId) {
+          builder.whereNot('id', notInvoiceId);
+        }
+      });
+
+    if (saleInvoice) {
+      throw new ServiceError(ERRORS.INVOICE_NUMBER_NOT_UNIQUE);
+    }
+  }
+
+  /**
+   * Validate the invoice amount is bigger than payment amount before edit the invoice.
+   * @param {number} saleInvoiceAmount
+   * @param {number} paymentAmount
+   */
+  public validateInvoiceAmountBiggerPaymentAmount(
+    saleInvoiceAmount: number,
+    paymentAmount: number
+  ) {
+    if (saleInvoiceAmount < paymentAmount) {
+      throw new ServiceError(ERRORS.INVOICE_AMOUNT_SMALLER_THAN_PAYMENT_AMOUNT);
+    }
+  }
+
+  /**
+   * Validate the invoice number require.
+   * @param {ISaleInvoice} saleInvoiceObj
+   */
+  public validateInvoiceNoRequire(invoiceNo: string) {
+    if (!invoiceNo) {
+      throw new ServiceError(ERRORS.SALE_INVOICE_NO_IS_REQUIRED);
+    }
+  }
+
+  /**
+   * Validate the given customer has no sales invoices.
+   * @param {number} tenantId
+   * @param {number} customerId - Customer id.
+   */
+  public async validateCustomerHasNoInvoices(
+    tenantId: number,
+    customerId: number
+  ) {
+    const { SaleInvoice } = this.tenancy.models(tenantId);
+
+    const invoices = await SaleInvoice.query().where('customer_id', customerId);
+
+    if (invoices.length > 0) {
+      throw new ServiceError(ERRORS.CUSTOMER_HAS_SALES_INVOICES);
+    }
+  }
+}