/**
 * @copyright Copyright (c) 2019 Roeland Jago Douma <roeland@famdouma.nl>
 *
 * @author Roeland Jago Douma <roeland@famdouma.nl>
 *
 * @license GNU AGPL version 3 or any later version
 *
 * 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/>.
 *
 */

/**
 * @namespace OCP.InitialState
 */

export function loadState(app, key) {
	const elem = document.querySelector(`#initial-state-${app}-${key}`)
	if (elem === null) {
		const msg = `Could not find initial state ${key} of ${app}`
		console.debug(msg)
		throw new Error(msg)
	}

	try {
		return JSON.parse(atob(elem.value))
	} catch (e) {
		const msg = `Could not parse initial state ${key} of ${app}`
		console.debug(msg)
		throw new Error(msg)
	}
}