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<?php
declare(strict_types=1);
/*
* @copyright 2022 Christoph Wurst <christoph@winzerhof-wurst.at>
*
* @author 2021 Christoph Wurst <christoph@winzerhof-wurst.at>
*
* @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 OC\Talk;
use OC\AppFramework\Bootstrap\Coordinator;
use OCP\IServerContainer;
use OCP\Talk\Exceptions\NoBackendException;
use OCP\Talk\IBroker;
use OCP\Talk\IConversation;
use OCP\Talk\IConversationOptions;
use OCP\Talk\ITalkBackend;
use Psr\Log\LoggerInterface;
use RuntimeException;
use Throwable;
class Broker implements IBroker {
private Coordinator $coordinator;
private IServerContainer $container;
private LoggerInterface $logger;
private ?bool $hasBackend = null;
private ?ITalkBackend $backend = null;
public function __construct(Coordinator $coordinator,
IServerContainer $container,
LoggerInterface $logger) {
$this->coordinator = $coordinator;
$this->container = $container;
$this->logger = $logger;
}
public function hasBackend(): bool {
if ($this->hasBackend !== null) {
return $this->hasBackend;
}
$context = $this->coordinator->getRegistrationContext();
if ($context === null) {
// Backend requested too soon, e.g. from the bootstrap `register` method of an app
throw new RuntimeException("Not all apps have been registered yet");
}
$backendRegistration = $context->getTalkBackendRegistration();
if ($backendRegistration === null) {
// Nothing to do. Remember and exit.
return $this->hasBackend = false;
}
try {
$this->backend = $this->container->get(
$backendRegistration->getService()
);
// Remember and return
return $this->hasBackend = true;
} catch (Throwable $e) {
$this->logger->error("Talk backend {class} could not be loaded: " . $e->getMessage(), [
'class' => $backendRegistration->getService(),
'exception' => $e,
]);
// Temporary result. Maybe the next time the backend is requested it can be loaded.
return false;
}
}
public function newConversationOptions(): IConversationOptions {
return ConversationOptions::default();
}
public function createConversation(string $name,
array $moderators,
IConversationOptions $options = null): IConversation {
if (!$this->hasBackend()) {
throw new NoBackendException("The Talk broker has no registered backend");
}
return $this->backend->createConversation(
$name,
$moderators,
$options ?? ConversationOptions::default()
);
}
public function deleteConversation(string $id): void {
if (!$this->hasBackend()) {
throw new NoBackendException("The Talk broker has no registered backend");
}
$this->backend->deleteConversation($id);
}
}
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