text: /*
   * Licensed to Elasticsearch B.V. under one or more contributor
   * license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright
   * ownership. Elasticsearch B.V. 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 { typesRegistry } from '../common/lib/types_registry';
  import { functionsRegistry as serverFunctions } from '../common/lib/functions_registry';
  import { getPluginPaths } from './get_plugin_paths';
  
  const registries = {
    serverFunctions: serverFunctions,
    commonFunctions: serverFunctions,
    types: typesRegistry,
  };
  
  let resolve = null;
  let called = false;
  
  const populatePromise = new Promise(_resolve => {
    resolve = _resolve;
  });
  
  export const getServerRegistries = () => {
    return populatePromise;
  };
  
  export const populateServerRegistries = types => {
    if (called) {
      return populatePromise;
    }
    called = true;
    if (!types || !types.length) throw new Error('types is required');
  
    const remainingTypes = types;
    const populatedTypes = {};
  
    const globalKeys = Object.keys(global);
  
    const loadType = () => {
      const type = remainingTypes.pop();
      getPluginPaths(type).then(paths => {
        global.canvas = global.canvas || {};
        global.canvas.register = d => registries[type].register(d);
  
        paths.forEach(path => {
          require(path);
        });
  
        Object.keys(global).forEach(key => {
          if (!globalKeys.includes(key)) {
            delete global[key];
          }
        });
  
        populatedTypes[type] = registries[type];
        if (remainingTypes.length) loadType();
        else resolve(populatedTypes);
      });
    };
  
    if (remainingTypes.length) loadType();
    return populatePromise;
  };
  