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<?php
/**
* SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OCA\DAV\CalDAV\ICSExportPlugin;
use OCP\IConfig;
use Psr\Log\LoggerInterface;
use Sabre\HTTP\ResponseInterface;
use Sabre\VObject\DateTimeParser;
use Sabre\VObject\InvalidDataException;
use Sabre\VObject\Property\ICalendar\Duration;
/**
* Class ICSExportPlugin
*
* @package OCA\DAV\CalDAV\ICSExportPlugin
*/
class ICSExportPlugin extends \Sabre\CalDAV\ICSExportPlugin {
/** @var string */
private const DEFAULT_REFRESH_INTERVAL = 'PT4H';
/**
* ICSExportPlugin constructor.
*/
public function __construct(
private IConfig $config,
private LoggerInterface $logger,
) {
}
/**
* @inheritDoc
*/
protected function generateResponse($path, $start, $end, $expand, $componentType, $format, $properties, ResponseInterface $response) {
if (!isset($properties['{http://nextcloud.com/ns}refresh-interval'])) {
$value = $this->config->getAppValue('dav', 'defaultRefreshIntervalExportedCalendars', self::DEFAULT_REFRESH_INTERVAL);
$properties['{http://nextcloud.com/ns}refresh-interval'] = $value;
}
return parent::generateResponse($path, $start, $end, $expand, $componentType, $format, $properties, $response);
}
/**
* @inheritDoc
*/
public function mergeObjects(array $properties, array $inputObjects) {
$vcalendar = parent::mergeObjects($properties, $inputObjects);
if (isset($properties['{http://nextcloud.com/ns}refresh-interval'])) {
$refreshIntervalValue = $properties['{http://nextcloud.com/ns}refresh-interval'];
try {
DateTimeParser::parseDuration($refreshIntervalValue);
} catch (InvalidDataException $ex) {
$this->logger->debug('Invalid refresh interval for exported calendar, falling back to default value ...');
$refreshIntervalValue = self::DEFAULT_REFRESH_INTERVAL;
}
// https://tools.ietf.org/html/rfc7986#section-5.7
$refreshInterval = new Duration($vcalendar, 'REFRESH-INTERVAL', $refreshIntervalValue);
$refreshInterval->add('VALUE', 'DURATION');
$vcalendar->add($refreshInterval);
// Legacy property for compatibility
$vcalendar->{'X-PUBLISHED-TTL'} = $refreshIntervalValue;
}
return $vcalendar;
}
}
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