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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\Signaling;
use OCA\Talk\Config;
use OCA\Talk\Room;
use OCP\ICache;
use OCP\ICacheFactory;
use OCP\IConfig;
class Manager {
/** @var IConfig */
protected $serverConfig;
/** @var Config */
protected $talkConfig;
/** @var ICache */
private $cache;
public function __construct(IConfig $serverConfig,
Config $talkConfig,
ICacheFactory $cacheFactory) {
$this->serverConfig = $serverConfig;
$this->talkConfig = $talkConfig;
$this->cache = $cacheFactory->createDistributed('hpb_servers');
}
public function getSignalingServerLinkForConversation(?Room $room): string {
if ($this->talkConfig->getSignalingMode() === Config::SIGNALING_INTERNAL) {
return '';
}
return $this->getSignalingServerForConversation($room)['server'];
}
public function getSignalingServerForConversation(?Room $room): array {
switch ($this->talkConfig->getSignalingMode()) {
case Config::SIGNALING_EXTERNAL:
return $this->getSignalingServerRandomly();
case Config::SIGNALING_CLUSTER_CONVERSATION:
if (!$room instanceof Room) {
throw new \RuntimeException('Can not get conversation cluster HPB without conversation');
}
return $this->getSignalingServerConversationCluster($room);
default:
throw new \RuntimeException('Unsupported signaling mode');
}
}
public function getSignalingServerRandomly(): array {
$servers = $this->talkConfig->getSignalingServers();
try {
$serverId = random_int(0, count($servers) - 1);
return $servers[$serverId];
} catch (\Exception $e) {
return $servers[0];
}
}
public function getSignalingServerConversationCluster(Room $room): array {
$serverId = $room->getAssignedSignalingServer();
$servers = $this->talkConfig->getSignalingServers();
if ($serverId !== null && isset($servers[$serverId])) {
return $servers[$serverId];
}
try {
$serverIdToAssign = random_int(0, count($servers) - 1);
} catch (\Exception $e) {
$serverIdToAssign = 0;
}
$hardcodedServers = $this->serverConfig->getSystemValue('talk_hardcoded_hpb', []);
if (isset($hardcodedServers[$room->getToken()])) {
$hardcodedServerId = $hardcodedServers[$room->getToken()];
if (isset($servers[$hardcodedServerId])) {
$serverIdToAssign = $hardcodedServerId;
}
}
$serverId = $this->cache->get($room->getToken());
if ($serverId === null) {
$this->cache->set($room->getToken(), $serverIdToAssign);
$serverId = $serverIdToAssign;
$room->setAssignedSignalingServer($serverId);
}
return $servers[$serverId];
}
}
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