text: /*
   * Copyright 2018 American Express Travel Related Services Company, Inc.
   *
   * 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.
   */
   
  function appReducer (store=[], action) {
    switch (action.type) {
      case 'CHAT_MESSAGE':
        return [...store, action.message];
      default:
        return store;
    }
  }
  
  export default appReducer;