acklen-keystone/admin/client/App/isomorphic/redux/themeSwitcher/reducer.js

Web Application Framework and Admin GUI / Content Management System built on Express.js and Mongoose

import { Map } from 'immutable';
import config, { getCurrentTheme } from '../../containers/ThemeSwitcher/config';
import actions from './actions';

const initState = new Map({
	isActivated: false,
	topbarTheme: getCurrentTheme(
		'topbarTheme',
		config.topbarTheme.defaultTheme || 'themedefault'
	),
	sidebarTheme: getCurrentTheme(
		'sidebarTheme',
		config.sidebarTheme.defaultTheme || 'themedefault'
	),
	layoutTheme: getCurrentTheme(
		'layoutTheme',
		config.layoutTheme.defaultTheme || 'themedefault'
	),
});

export default function (state = initState, action) {
	switch (action.type) {
		case actions.SWITCH_ACTIVATION:
			return state.set('isActivated', !state.get('isActivated'));
		case actions.CHANGE_THEME:
			return state.set(action.attribute, action.theme);
		default:
			return state;
	}
}