/**
 * @copyright Copyright (c) 2019 Georg Ehrke
 *
 * @author Georg Ehrke <oc.list@georgehrke.com>
 *
 * @license AGPL-3.0-or-later
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 */
import { getTimezoneManager } from '@nextcloud/calendar-js'

const timezoneManager = getTimezoneManager()
let initialized = false

/**
 * Gets the timezone-manager
 * initializes it if necessary
 *
 * @return {TimezoneManager}
 */
export default function() {
	if (!initialized) {
		timezoneManager.registerDefaultTimezones()

		initialized = true
	}

	return timezoneManager
}