reducers.js

// Main reducer
import {combineReducers} from 'redux';
import {routerReducer} from 'react-router-redux';
import WhateverReducer, * as fromWhateverReducer from './reducer-Whatever';
import UIReducer, * as fromUIReducer from './reducer-UI';
import {storeSelector} from 'helpers/';

export const rootReducer = combineReducers({
  uiState: UIReducer,
  whatever: WhateverReducer,
  router: routerReducer,
});

const selectors = {
  whatever: state => state.whatever,
  trips: state => state.uiState.searching || state.uiState.filters.length ?
    storeSelector(state.trips, state.uiState.searching, state.uiState.filters) :
    state.trips,
  ui: state => state.uiState,
};

export const stateSelector = (selection, state) => {
  return selectors[selection](state);
};

export const isToggled = (state, toggle) =>
  fromUIReducer.isToggled(state.uiState, toggle);