feat: tax rates crud service

packages/server/src/services/TaxRates/CommandTaxRatesValidators.ts

@@ -1,16 +1,36 @@
 import { ServiceError } from '@/exceptions';
-import TaxRate from '@/models/TaxRate';
-import { Service } from 'typedi';
+import { Inject, Service } from 'typedi';
+import HasTenancyService from '../Tenancy/TenancyService';
+import { ITaxRate } from '@/interfaces';
+import { ERRORS } from './constants';
 
 @Service()
 export class CommandTaxRatesValidators {
+  @Inject()
+  private tenancy: HasTenancyService;
+
   /**
-   * 
-   * @param {} taxRate 
+   * Validates the tax rate existance.
+   * @param {TaxRate | undefined | null} taxRate
    */
-  public validateTaxRateExistance(taxRate: TaxRate | undefined | null) {
+  public validateTaxRateExistance(taxRate: ITaxRate | undefined | null) {
     if (!taxRate) {
       throw new ServiceError(ERRORS.TAX_RATE_NOT_FOUND);
     }
   }
+
+  /**
+   * Validates the tax code uniquiness.
+   * @param {number} tenantId
+   * @param {string} taxCode
+   */
+  public async validateTaxCodeUnique(tenantId: number, taxCode: string) {
+    const { TaxRate } = this.tenancy.models(tenantId);
+
+    const foundTaxCode = await TaxRate.query().findOne({ code: taxCode });
+
+    if (foundTaxCode) {
+      throw new ServiceError(ERRORS.TAX_CODE_NOT_UNIQUE);
+    }
+  }
 }