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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2023 Marcel Klehr <mklehr@gmx.net>
*
* @author Marcel Klehr <mklehr@gmx.net>
*
* @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\TextProcessing;
use OC\AppFramework\Bootstrap\Coordinator;
use OC\TextProcessing\Db\Task as DbTask;
use \OCP\TextProcessing\Task as OCPTask;
use OC\TextProcessing\Db\TaskMapper;
use OCP\AppFramework\Db\DoesNotExistException;
use OCP\AppFramework\Db\MultipleObjectsReturnedException;
use OCP\BackgroundJob\IJobList;
use OCP\Common\Exception\NotFoundException;
use OCP\DB\Exception;
use OCP\IServerContainer;
use OCP\TextProcessing\IManager;
use OCP\TextProcessing\IProvider;
use OCP\PreConditionNotMetException;
use Psr\Log\LoggerInterface;
use RuntimeException;
use Throwable;
class Manager implements IManager {
/** @var ?IProvider[] */
private ?array $providers = null;
public function __construct(
private IServerContainer $serverContainer,
private Coordinator $coordinator,
private LoggerInterface $logger,
private IJobList $jobList,
private TaskMapper $taskMapper,
) {
}
public function getProviders(): array {
$context = $this->coordinator->getRegistrationContext();
if ($context === null) {
return [];
}
if ($this->providers !== null) {
return $this->providers;
}
$this->providers = [];
foreach ($context->getTextProcessingProviders() as $providerServiceRegistration) {
$class = $providerServiceRegistration->getService();
try {
$this->providers[$class] = $this->serverContainer->get($class);
} catch (Throwable $e) {
$this->logger->error('Failed to load Text processing provider ' . $class, [
'exception' => $e,
]);
}
}
return $this->providers;
}
public function hasProviders(): bool {
$context = $this->coordinator->getRegistrationContext();
if ($context === null) {
return false;
}
return count($context->getTextProcessingProviders()) > 0;
}
/**
* @inheritDoc
*/
public function getAvailableTaskTypes(): array {
$tasks = [];
foreach ($this->getProviders() as $provider) {
$tasks[$provider->getTaskType()] = true;
}
return array_keys($tasks);
}
public function canHandleTask(OCPTask $task): bool {
return in_array($task->getType(), $this->getAvailableTaskTypes());
}
/**
* @inheritDoc
*/
public function runTask(OCPTask $task): string {
if (!$this->canHandleTask($task)) {
throw new PreConditionNotMetException('No text processing provider is installed that can handle this task');
}
foreach ($this->getProviders() as $provider) {
if (!$task->canUseProvider($provider)) {
continue;
}
try {
$task->setStatus(OCPTask::STATUS_RUNNING);
if ($task->getId() === null) {
$taskEntity = $this->taskMapper->insert(DbTask::fromPublicTask($task));
$task->setId($taskEntity->getId());
} else {
$this->taskMapper->update(DbTask::fromPublicTask($task));
}
$output = $task->visitProvider($provider);
$task->setOutput($output);
$task->setStatus(OCPTask::STATUS_SUCCESSFUL);
$this->taskMapper->update(DbTask::fromPublicTask($task));
return $output;
} catch (\RuntimeException $e) {
$this->logger->info('LanguageModel call using provider ' . $provider->getName() . ' failed', ['exception' => $e]);
$task->setStatus(OCPTask::STATUS_FAILED);
$this->taskMapper->update(DbTask::fromPublicTask($task));
throw $e;
} catch (\Throwable $e) {
$this->logger->info('LanguageModel call using provider ' . $provider->getName() . ' failed', ['exception' => $e]);
$task->setStatus(OCPTask::STATUS_FAILED);
$this->taskMapper->update(DbTask::fromPublicTask($task));
throw new RuntimeException('LanguageModel call using provider ' . $provider->getName() . ' failed: ' . $e->getMessage(), 0, $e);
}
}
throw new RuntimeException('Could not run task');
}
/**
* @inheritDoc
* @throws Exception
*/
public function scheduleTask(OCPTask $task): void {
if (!$this->canHandleTask($task)) {
throw new PreConditionNotMetException('No LanguageModel provider is installed that can handle this task');
}
$task->setStatus(OCPTask::STATUS_SCHEDULED);
$taskEntity = DbTask::fromPublicTask($task);
$this->taskMapper->insert($taskEntity);
$task->setId($taskEntity->getId());
$this->jobList->add(TaskBackgroundJob::class, [
'taskId' => $task->getId()
]);
}
/**
* @param int $id The id of the task
* @return OCPTask
* @throws RuntimeException If the query failed
* @throws NotFoundException If the task could not be found
*/
public function getTask(int $id): OCPTask {
try {
$taskEntity = $this->taskMapper->find($id);
return $taskEntity->toPublicTask();
} catch (DoesNotExistException $e) {
throw new NotFoundException('Could not find task with the provided id');
} catch (MultipleObjectsReturnedException $e) {
throw new RuntimeException('Could not uniquely identify task with given id', 0, $e);
} catch (Exception $e) {
throw new RuntimeException('Failure while trying to find task by id: '.$e->getMessage(), 0, $e);
}
}
}
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