<?php

declare(strict_types=1);
/**
 * @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 OCA\Talk\Listener;

use OCA\Talk\Config;
use OCP\AppFramework\Http\ContentSecurityPolicy;
use OCP\EventDispatcher\Event;
use OCP\EventDispatcher\IEventListener;
use OCP\Security\CSP\AddContentSecurityPolicyEvent;

/**
 * @template-implements IEventListener<Event>
 */
class CSPListener implements IEventListener {

	public function __construct(
		private Config $config,
	) {
	}

	public function handle(Event $event): void {
		if (!($event instanceof AddContentSecurityPolicyEvent)) {
			return;
		}

		$csp = new ContentSecurityPolicy();
		$csp->addAllowedImageDomain('https://*.tile.openstreetmap.org');
		$csp->addAllowedMediaDomain('blob:');
		$csp->addAllowedWorkerSrcDomain('blob:');
		$csp->addAllowedWorkerSrcDomain("'self'");
		$csp->addAllowedChildSrcDomain('blob:');
		$csp->addAllowedChildSrcDomain("'self'");
		$csp->addAllowedScriptDomain('blob:');
		$csp->addAllowedScriptDomain("'self'");
		$csp->addAllowedConnectDomain('blob:');
		$csp->addAllowedConnectDomain("'self'");
		foreach ($this->config->getAllServerUrlsForCSP() as $server) {
			$csp->addAllowedConnectDomain($server);
		}

		$event->addPolicy($csp);
	}
}
