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/**
 * ============LICENSE_START========================================================================
 * ONAP : ccsdk feature sdnr wt odlux
 * =================================================================================================
 * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
 * =================================================================================================
 * 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.
 * ============LICENSE_END==========================================================================
 */
import { IActionHandler } from '../../../../framework/src/flux/action';

import { IAuthor } from '../models/author';
import { LoadAllAuthorsAction, AllAuthorsLoadedAction } from '../actions/authorActions';

export interface IListAuthors {
  authors: IAuthor[];
  busy: boolean;
}

const listAuthorsInit: IListAuthors = {
  authors: [],
  busy: false,
};

export const listAuthorsHandler: IActionHandler<IListAuthors> = (state = listAuthorsInit, action) => {
  if (action instanceof LoadAllAuthorsAction) {

    state = {
      ...state,
      busy: true,
    };
  
  } else if (action instanceof AllAuthorsLoadedAction) {
    if (!action.error && action.authors) {
      state = {
        ...state,
        authors: action.authors,
        busy: false,
      };
    } else {
      state = {
        ...state,
        busy: false,
      };
    }
  }

  return state;
};