text: /*****************************************************************************
   * Open MCT, Copyright (c) 2014-2021, United States Government
   * as represented by the Administrator of the National Aeronautics and Space
   * Administration. All rights reserved.
   *
   * Open MCT is licensed 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.
   *
   * Open MCT includes source code licensed under additional open source
   * licenses. See the Open Source Licenses file (LICENSES.md) included with
   * this source code distribution or the Licensing information page available
   * at runtime from the About dialog for additional information.
   *****************************************************************************/
  
  import { BAR_GRAPH_KEY } from './BarGraphConstants';
  
  export default function BarGraphCompositionPolicy(openmct) {
      function hasAggregateDomainAndRange(metadata) {
          const rangeValues = metadata.valuesForHints(['range']);
  
          return rangeValues.length > 0;
      }
  
      function hasBarGraphTelemetry(domainObject) {
          if (!Object.prototype.hasOwnProperty.call(domainObject, 'telemetry')) {
              return false;
          }
  
          let metadata = openmct.telemetry.getMetadata(domainObject);
  
          return metadata.values().length > 0 && hasAggregateDomainAndRange(metadata);
      }
  
      function hasNoChildren(parentObject) {
          return parentObject.composition && parentObject.composition.length < 1;
      }
  
      return {
          allow: function (parent, child) {
              if ((parent.type === BAR_GRAPH_KEY)
                  && ((child.type !== 'telemetry.plot.overlay') && (hasBarGraphTelemetry(child) === false))
              ) {
                  return false;
              }
  
              return true;
          }
      };
  }
  