text: import {
    userFetchStartedType as USER_FETCH_STARTED,
    userReceivedType as USER_RECEIVED,
    userSettingsUpdatedType as USER_SETTINGS_UPDATED,
  } from '../actions/actionCreators/userActions';
  
  const initialState = {
    isLoading: false,
    data: {},
  };
  
  export default function user(state = initialState, action) {
    switch (action.type) {
      case USER_FETCH_STARTED:
        return {
          ...state,
          isLoading: true,
        };
      case USER_SETTINGS_UPDATED:
      case USER_RECEIVED:
        // TODO: When does this happen? Should this happen, or should
        // an error be thrown instead?
        if (!action.user) {
          return false;
        }
  
        return {
          isLoading: false,
          data: {
            ...action.user,
          },
        };
      default:
        return state;
    }
  }
  