scoped-reducers-with-helpers.js

import globalNavigation from './components/GlobalNavigation/reducer';
import tabs from './components/ApplicationTabs/reducer';
import feed from './components/Feed/reducer';
import { combineReducers } from 'redux-immutable';

const scopeNavigationReducer = (reducer, scopeName) => {
  return (state, action) => {
    if (action.scope && action.scope !== scopeName) {
      return state;
    } else {
      return reducer(state, action);
    }
  };
};

const applicationReducers = {
  globalNavigation: scopeNavigationReducer(globalNavigation, 'global'),
  tabs: scopeNavigationReducer(tabs, 'tabs'),
  feed: scopeNavigationReducer(feed, 'feed')
};

export default function createReducer() {
  return combineReducers(applicationReducers);
}