superset-frontend/src/dashboard/reducers/datasources.js

/**
 * 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 { SET_DATASOURCE } from '../actions/datasources';

export default function datasourceReducer(datasources = {}, action) {
  const actionHandlers = {
    [SET_DATASOURCE]() {
      return action.datasource;
    },
  };

  if (action.type in actionHandlers) {
    return {
      ...datasources,
      [action.key]: actionHandlers[action.type](
        datasources[action.key],
        action,
      ),
    };
  }
  return datasources;
}