feat(server): wip tax rates service

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

@@ -0,0 +1,28 @@
+import { Inject, Service } from 'typedi';
+import HasTenancyService from '../Tenancy/TenancyService';
+import { CommandTaxRatesValidators } from './CommandTaxRatesValidators';
+
+@Service()
+export class GetTaxRateService {
+  @Inject()
+  private tenancy: HasTenancyService;
+
+  @Inject()
+  private validators: CommandTaxRatesValidators;
+
+  /**
+   *
+   * @param {number} tenantId
+   * @param {number} taxRateId
+   * @returns
+   */
+  public async getTaxRate(tenantId: number, taxRateId: number) {
+    const { TaxRate } = this.tenancy.models(tenantId);
+
+    const taxRate = await TaxRate.query().findById(taxRateId);
+
+    this.validators.validateTaxRateExistance(taxRate);
+
+    return taxRate;
+  }
+}