text: import {
      alertConstants
  } from '../_constants';
  
  export function alert(state = {}, action) {
      switch (action.type) {
          case alertConstants.SUCCESS:
              return {
                  type: 'alert-success',
                  message: action.message
              };
          case alertConstants.ERROR:
              return {
                  type: 'alert-danger',
                  message: action.message
              };
          case alertConstants.CLEAR:
              return {};
          default:
              return state
      }
  }