ambari-logsearch-web/src/app/modules/shipper/directives/validator.directive.ts

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { AbstractControl, ValidatorFn } from '@angular/forms';
import { ShipperClusterService } from '@modules/shipper/models/shipper-cluster-service.type';
import { ValidationErrors } from '@angular/forms/src/directives/validators';
import { BehaviorSubject } from 'rxjs/BehaviorSubject';

export function configurationValidator(): ValidatorFn {
  return (control: AbstractControl): ValidationErrors | null => {
    try {
      const json: { [key: string]: any } = JSON.parse(control.value);
      return null;
    } catch (error) {
      return {
        invalidJSON: { value: control.value }
      };
    }
  };
}

export function uniqueServiceNameValidator(serviceNames: BehaviorSubject<ShipperClusterService[]>): ValidatorFn {
  return (control: AbstractControl): ValidationErrors | null => {
    const services: ShipperClusterService[] = serviceNames.getValue();
    return services && services.indexOf(control.value) > -1
      ? {
          serviceNameExists: { value: control.value }
        }
      : null;
  };
}

export function getConfigurationServiceValidator(configControl: AbstractControl, valueMapper?: Function): ValidatorFn {
  return (control: AbstractControl): ValidationErrors | null => {
    let components: string[];
    try {
      const inputs: { [key: string]: any }[] = (configControl.value ? JSON.parse(configControl.value) : {}).input;
      components = inputs && inputs.length ? inputs.map(input => input.type) : [];
    } catch (error) {
      components = [];
    }
    const value = valueMapper ? valueMapper(control.value) : control.value;
    return components.length && components.indexOf(value) === -1
      ? {
          serviceNameDoesNotExistInConfiguration: { value: value }
        }
      : null;
  };
}