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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2017 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\Signaling;
use OCA\Talk\Room;
use OCP\AppFramework\Utility\ITimeFactory;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\IDBConnection;
class Messages {
/** @var IDBConnection */
protected $db;
/** @var ITimeFactory */
protected $timeFactory;
public function __construct(IDBConnection $db,
ITimeFactory $timeFactory) {
$this->db = $db;
$this->timeFactory = $timeFactory;
}
/**
* @param string[] $sessionIds
*/
public function deleteMessages(array $sessionIds): void {
$query = $this->db->getQueryBuilder();
$query->delete('talk_signaling')
->where($query->expr()->in('recipient', $query->createNamedParameter($sessionIds, IQueryBuilder::PARAM_STR_ARRAY)))
->orWhere($query->expr()->in('sender', $query->createNamedParameter($sessionIds, IQueryBuilder::PARAM_STR_ARRAY)));
$query->execute();
}
/**
* @param string $senderSessionId
* @param string $recipientSessionId
* @param string $message
*/
public function addMessage(string $senderSessionId, string $recipientSessionId, string $message): void {
$query = $this->db->getQueryBuilder();
$query->insert('talk_signaling')
->values(
[
'sender' => $query->createNamedParameter($senderSessionId),
'recipient' => $query->createNamedParameter($recipientSessionId),
'timestamp' => $query->createNamedParameter($this->timeFactory->getTime()),
'message' => $query->createNamedParameter($message),
]
);
$query->execute();
}
/**
* @param Room $room
* @param string $message
*/
public function addMessageForAllParticipants(Room $room, string $message): void {
$query = $this->db->getQueryBuilder();
$query->insert('talk_signaling')
->values(
[
'sender' => $query->createParameter('sender'),
'recipient' => $query->createParameter('recipient'),
'timestamp' => $query->createNamedParameter($this->timeFactory->getTime()),
'message' => $query->createNamedParameter($message),
]
);
foreach ($room->getActiveSessions() as $sessionId) {
$query->setParameter('sender', $sessionId)
->setParameter('recipient', $sessionId)
->execute();
}
}
/**
* Get messages and delete them afterwards
*
* To make sure we don't delete messages which we didn't return
* we do it with 1 second difference. This means you don't receive messages
* immediately, but the next polling is only 1 second later and will get the
* "new" message.
*
* @param string $sessionId
* @return array
*/
public function getAndDeleteMessages(string $sessionId): array {
$messages = [];
$time = $this->timeFactory->getTime() - 1;
$query = $this->db->getQueryBuilder();
$query->select('*')
->from('talk_signaling')
->where($query->expr()->eq('recipient', $query->createNamedParameter($sessionId)))
->andWhere($query->expr()->lte('timestamp', $query->createNamedParameter($time)));
$result = $query->execute();
while ($row = $result->fetch()) {
$messages[] = ['type' => 'message', 'data' => $row['message']];
}
$result->closeCursor();
$query = $this->db->getQueryBuilder();
$query->delete('talk_signaling')
->where($query->expr()->eq('recipient', $query->createNamedParameter($sessionId)))
->andWhere($query->expr()->lte('timestamp', $query->createNamedParameter($time)));
$query->execute();
return $messages;
}
/**
* Expires all signaling messages that are too old or invalid
*
* @param int $olderThan
*/
public function expireOlderThan(int $olderThan): void {
$time = $this->timeFactory->getTime() - $olderThan;
$query = $this->db->getQueryBuilder();
$query->delete('talk_signaling')
->where($query->expr()->lt('timestamp', $query->createNamedParameter($time)));
$query->execute();
}
}
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