cleanMapStateToProps function for redux

redux.js

/* eslint-disable import/prefer-default-export */
import { initialStates } from '../reducers';

const defaultPropDef = {
  value: null,
  writable: false,
  configurable: true,
  enumerable: true
};

// Grabs all appropriate states to use in a container
const getters = Object
  .keys(initialStates)
  .reduce((gets, reducer) => (
    Object.keys(initialStates[reducer])
      .reduce((_, propName) => (
        Object.defineProperty(gets, propName, {
          ...defaultPropDef,
          value: state => state[reducer][propName]
        })
      ), gets)
  ), {});

/* eslint-disable key-spacing, no-multi-spaces */
export const cleanMapStateToProps = (incl = []) => (state, props) => ({
  ...props,
  ...incl.reduce((obj, key) => {
    if (getters[key]) return { ...obj, [key]: getters[key](state, props) };
    /* eslint-disable no-console */
    console.warn(`WARNING: "${key}" is not specified in any reducer's initialState`);
    /* eslint-enable */
    return obj;
  }, {})
});

const mapDispatchToProps = dispatch => ({
  signOut: () => { dispatch(signOut()); },
  onAuthStateChange: () => { dispatch(onAuthStateChange()); },
  toggleNotification: (notification, notificationMessage, type) => {
    dispatch(toggleNotification(notification, notificationMessage, type));
  }
});

export default connect(cleanMapStateToProps([
  'user',
  'notification',
  'notificationMessage',
  'notificationType'
]), mapDispatchToProps)(MainContainer);