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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2020 Joas Schilling <coding@schilljs.com>
*
* @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\Service;
use Doctrine\DBAL\Exception\UniqueConstraintViolationException;
use OCA\Talk\Model\Attendee;
use OCA\Talk\Model\Session;
use OCA\Talk\Model\SessionMapper;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\IDBConnection;
use OCP\Security\ISecureRandom;
class SessionService {
/** @var SessionMapper */
protected $sessionMapper;
/** @var IDBConnection */
protected $connection;
/** @var ISecureRandom */
protected $secureRandom;
public function __construct(SessionMapper $sessionMapper,
IDBConnection $connection,
ISecureRandom $secureRandom) {
$this->sessionMapper = $sessionMapper;
$this->connection = $connection;
$this->secureRandom = $secureRandom;
}
/**
* Update last ping for multiple sessions
*
* Since this function is called by the HPB with potentially hundreds of
* sessions, we do not use the SessionMapper to get the entities first, as
* that would just not scale good enough.
*
* @param string[] $sessionIds
* @param int $lastPing
*/
public function updateMultipleLastPings(array $sessionIds, int $lastPing): void {
$query = $this->connection->getQueryBuilder();
$query->update('talk_sessions')
->set('last_ping', $query->createNamedParameter($lastPing, IQueryBuilder::PARAM_INT))
->where($query->expr()->in('session_id', $query->createNamedParameter($sessionIds, IQueryBuilder::PARAM_STR_ARRAY)));
$query->execute();
}
public function updateLastPing(Session $session, int $lastPing): void {
$session->setLastPing($lastPing);
$this->sessionMapper->update($session);
}
/**
* @param int[] $ids
*/
public function deleteSessionsById(array $ids): void {
$this->sessionMapper->deleteByIds($ids);
}
/**
* @param Attendee $attendee
* @param string $forceSessionId
* @return Session
* @throws UniqueConstraintViolationException
*/
public function createSessionForAttendee(Attendee $attendee, string $forceSessionId = ''): Session {
// Currently a participant can only join once
$this->sessionMapper->deleteByAttendeeId($attendee->getId());
$session = new Session();
$session->setAttendeeId($attendee->getId());
if ($forceSessionId !== '') {
$session->setSessionId($forceSessionId);
try {
$this->sessionMapper->insert($session);
} catch (UniqueConstraintViolationException $e) {
// The HPB told us to use a session which exists already…
throw $e;
}
} else {
while (true) {
$sessionId = $this->secureRandom->generate(255);
$session->setSessionId($sessionId);
try {
$this->sessionMapper->insert($session);
break;
} catch (UniqueConstraintViolationException $e) {
// 255 chars are not unique? Try again...
}
}
}
return $session;
}
}
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