LLM OCP API: Implement private backend code + add ILanguageModelTask

Signed-off-by: Marcel Klehr <mklehr@gmx.net>

12 files changed, 452 insertions, 46 deletions

diff --git a/lib/private/LanguageModel/Db/Task.php b/lib/private/LanguageModel/Db/Task.php
new file mode 100644
index 00000000000..cee6c2fd8b9
--- /dev/null
+++ b/lib/private/LanguageModel/Db/Task.php
@@ -0,0 +1,58 @@
+<?php
+
+namespace OC\LanguageModel\Db;
+
+use OCP\AppFramework\Db\Entity;
+use OCP\LanguageModel\ILanguageModelTask;
+
+/**
+ * @method setType(string $type)
+ * @method string getType()
+ * @method setInput(string $type)
+ * @method string getInput()
+ * @method setStatus(int $type)
+ * @method int getStatus()
+ * @method setUserId(string $type)
+ * @method string getuserId()
+ * @method setAppId(string $type)
+ * @method string getAppId()
+ */
+class Task extends Entity {
+
+	protected $type;
+	protected $input;
+	protected $status;
+	protected $userId;
+	protected $appId;
+
+	/**
+	 * @var string[]
+	 */
+	public static array $columns = ['id', 'type', 'input', 'status', 'user_id', 'app_id'];
+
+	/**
+	 * @var string[]
+	 */
+	public static array $fields = ['id', 'type', 'input', 'status', 'userId', 'appId'];
+
+
+	public function __construct() {
+		// add types in constructor
+		$this->addType('id', 'integer');
+		$this->addType('type', 'string');
+		$this->addType('input', 'string');
+		$this->addType('status', 'integer');
+		$this->addType('userId', 'string');
+		$this->addType('appId', 'string');
+	}
+
+	public static function fromLanguageModelTask(ILanguageModelTask $task): Task {
+		return Task::fromParams([
+			'type' => $task->getType(),
+			'status' => ILanguageModelTask::STATUS_UNKNOWN,
+			'input' => $task->getInput(),
+			'userId' => $task->getUserId(),
+			'appId' => $task->getAppId(),
+		]);
+	}
+}
diff --git a/lib/private/LanguageModel/Db/TaskMapper.php b/lib/private/LanguageModel/Db/TaskMapper.php
new file mode 100644
index 00000000000..0b9004c4d96
--- /dev/null
+++ b/lib/private/LanguageModel/Db/TaskMapper.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace OC\LanguageModel\Db;
+
+use OCP\AppFramework\Db\DoesNotExistException;
+use OCP\AppFramework\Db\MultipleObjectsReturnedException;
+use OCP\AppFramework\Db\QBMapper;
+use OCP\DB\Exception;
+use OCP\IDBConnection;
+
+/**
+ * @extends QBMapper<Task>
+ */
+class TaskMapper extends QBMapper {
+
+	public function __construct(IDBConnection $db) {
+		parent::__construct($db, 'oc_llm_tasks', Task::class);
+	}
+
+	/**
+	 * @param int $id
+	 * @return Task
+	 * @throws Exception
+	 * @throws DoesNotExistException
+	 * @throws MultipleObjectsReturnedException
+	 */
+	public function find(int $id): Task {
+		$qb = $this->db->getQueryBuilder();
+		$qb->select(Task::$columns)
+			->from($this->tableName)
+			->where($qb->expr()->eq('id', $qb->createPositionalParameter($id)));
+		return $this->findEntity($qb);
+	}
+}
diff --git a/lib/private/LanguageModel/LanguageModelManager.php b/lib/private/LanguageModel/LanguageModelManager.php
new file mode 100644
index 00000000000..f9f13b15d6e
--- /dev/null
+++ b/lib/private/LanguageModel/LanguageModelManager.php
@@ -0,0 +1,162 @@
+<?php
+
+namespace OC\LanguageModel;
+
+use OC\AppFramework\Bootstrap\Coordinator;
+use OC\LanguageModel\Db\Task;
+use OC\LanguageModel\Db\TaskMapper;
+use OCP\LanguageModel\AbstractLanguageModelTask;
+use OCP\LanguageModel\FreePromptTask;
+use OCP\LanguageModel\SummaryTask;
+use OCP\AppFramework\Db\DoesNotExistException;
+use OCP\AppFramework\Db\MultipleObjectsReturnedException;
+use OCP\BackgroundJob\IJobList;
+use OCP\DB\Exception;
+use OCP\IServerContainer;
+use OCP\LanguageModel\ILanguageModelManager;
+use OCP\LanguageModel\ILanguageModelProvider;
+use OCP\LanguageModel\ILanguageModelTask;
+use OCP\LanguageModel\ISummaryProvider;
+use OCP\PreConditionNotMetException;
+use Psr\Container\ContainerExceptionInterface;
+use Psr\Container\NotFoundExceptionInterface;
+use Psr\Log\LoggerInterface;
+use RuntimeException;
+use Throwable;
+
+class LanguageModelManager implements ILanguageModelManager {
+
+	/** @var ?ILanguageModelProvider[] */
+	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->getSpeechToTextProviders() as $providerServiceRegistration) {
+			$class = $providerServiceRegistration->getService();
+			try {
+				$this->providers[$class] = $this->serverContainer->get($class);
+			} catch (NotFoundExceptionInterface|ContainerExceptionInterface|Throwable $e) {
+				$this->logger->error('Failed to load LanguageModel provider ' . $class, [
+					'exception' => $e,
+				]);
+			}
+		}
+
+		return $this->providers;
+	}
+
+	public function hasProviders(): bool {
+		$context = $this->coordinator->getRegistrationContext();
+		if ($context === null) {
+			return false;
+		}
+		return !empty($context->getSpeechToTextProviders());
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getAvailableTasks(): array {
+		$tasks = [];
+		foreach ($this->getProviders() as $provider) {
+			$tasks[FreePromptTask::class] = true;
+			if ($provider instanceof ISummaryProvider) {
+				$tasks[SummaryTask::class] = true;
+			}
+		}
+		return array_keys($tasks);
+	}
+
+	public function canHandleTask(ILanguageModelTask $task): bool {
+		return !empty(array_filter($this->getAvailableTasks(), fn ($class) => $task instanceof $class));
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function runTask(ILanguageModelTask $task): string {
+		if (!$this->canHandleTask($task)) {
+			throw new PreConditionNotMetException('No LanguageModel provider is installed that can handle this task');
+		}
+		foreach ($this->getProviders() as $provider) {
+			if (!$task->canUseProvider($provider)) {
+				continue;
+			}
+			try {
+				$task->setStatus(ILanguageModelTask::STATUS_RUNNING);
+				$this->taskMapper->update(Task::fromLanguageModelTask($task));
+				$output = $task->visitProvider($provider);
+				$task->setStatus(ILanguageModelTask::STATUS_SUCCESSFUL);
+				$this->taskMapper->update(Task::fromLanguageModelTask($task));
+				return $output;
+			} catch (\RuntimeException $e) {
+				$this->logger->info('LanguageModel call using provider ' . $provider->getName() . ' failed', ['exception' => $e]);
+				$task->setStatus(ILanguageModelTask::STATUS_FAILED);
+				$this->taskMapper->update(Task::fromLanguageModelTask($task));
+				throw $e;
+			} catch (\Throwable $e) {
+				$this->logger->info('LanguageModel call using provider ' . $provider->getName() . ' failed', ['exception' => $e]);
+				$task->setStatus(ILanguageModelTask::STATUS_FAILED);
+				$this->taskMapper->update(Task::fromLanguageModelTask($task));
+				throw new RuntimeException('LanguageModel call using provider ' . $provider->getName() . ' failed: ' . $e->getMessage());
+			}
+		}
+
+		throw new RuntimeException('Could not transcribe file');
+	}
+
+	/**
+	 * @inheritDoc
+	 * @throws Exception
+	 */
+	public function scheduleTask(ILanguageModelTask $task): void {
+		if (!$this->canHandleTask($task)) {
+			throw new PreConditionNotMetException('No LanguageModel provider is installed that can handle this task');
+		}
+		$taskEntity = Task::fromLanguageModelTask($task);
+		$this->taskMapper->insert($taskEntity);
+		$task->setId($taskEntity->getId());
+		$task->setStatus(ILanguageModelTask::STATUS_SCHEDULED);
+		$this->jobList->add(TaskBackgroundJob::class, [
+			'taskId' => $task->getId()
+		]);
+	}
+
+	/**
+	 * @param int $id The id of the task
+	 * @return ILanguageModelTask
+	 * @throws RuntimeException If the query failed
+	 * @throws \ValueError If the task could not be found
+	 */
+	public function getTask(int $id): ILanguageModelTask {
+		try {
+			$taskEntity = $this->taskMapper->find($id);
+			return AbstractLanguageModelTask::fromTaskEntity($taskEntity);
+		} catch (DoesNotExistException $e) {
+			throw new \ValueError('Could not find task with the provided id');
+		} catch (MultipleObjectsReturnedException $e) {
+			throw new RuntimeException('Could not uniquely identify task with given id');
+		} catch (Exception $e) {
+			throw new RuntimeException('Failure while trying to find task by id: '.$e->getMessage());
+		}
+	}
+}
diff --git a/lib/private/LanguageModel/TaskBackgroundJob.php b/lib/private/LanguageModel/TaskBackgroundJob.php
new file mode 100644
index 00000000000..55413ba3714
--- /dev/null
+++ b/lib/private/LanguageModel/TaskBackgroundJob.php
@@ -0,0 +1,72 @@
+<?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\LanguageModel;
+
+use OC\User\NoUserException;
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\BackgroundJob\QueuedJob;
+use OCP\EventDispatcher\IEventDispatcher;
+use OCP\Files\File;
+use OCP\Files\IRootFolder;
+use OCP\Files\NotFoundException;
+use OCP\Files\NotPermittedException;
+use OCP\LanguageModel\Events\TaskFailedEvent;
+use OCP\LanguageModel\Events\TaskSuccessfulEvent;
+use OCP\LanguageModel\ILanguageModelManager;
+use OCP\PreConditionNotMetException;
+use OCP\SpeechToText\Events\TranscriptionFailedEvent;
+use OCP\SpeechToText\Events\TranscriptionSuccessfulEvent;
+use OCP\SpeechToText\ISpeechToTextManager;
+use Psr\Log\LoggerInterface;
+
+class TaskBackgroundJob extends QueuedJob {
+	public function __construct(
+		ITimeFactory $timeFactory,
+		private ILanguageModelManager $languageModelManager,
+		private IEventDispatcher $eventDispatcher,
+	) {
+		parent::__construct($timeFactory);
+		$this->setAllowParallelRuns(false);
+	}
+
+	/**
+	 * @param array{taskId: int} $argument
+	 * @inheritDoc
+	 */
+	protected function run($argument) {
+		$taskId = $argument['taskId'];
+		$task = $this->languageModelManager->getTask($taskId);
+		try {
+			$output = $this->languageModelManager->runTask($task);
+			$event = new TaskSuccessfulEvent($task, $output);
+
+		} catch (\RuntimeException|PreConditionNotMetException $e) {
+			$event = new TaskFailedEvent($task, $e->getMessage());
+		}
+		$this->eventDispatcher->dispatchTyped($event);
+	}
+}
diff --git a/lib/public/LanguageModel/AbstractLanguageModelTask.php b/lib/public/LanguageModel/AbstractLanguageModelTask.php
index 50ae2095235..12aedc95fe5 100644
--- a/lib/public/LanguageModel/AbstractLanguageModelTask.php
+++ b/lib/public/LanguageModel/AbstractLanguageModelTask.php
@@ -2,71 +2,91 @@
 
 namespace OCP\LanguageModel;
 
-abstract class AbstractLanguageModelTask {
 
-	public const STATUS_UNKNOWN = 0;
-	public const STATUS_RUNNING = 1;
-	public const STATUS_SUCCESSFUL = 2;
-	public const STATUS_FAILED = 4;
+use OC\LanguageModel\Db\Task;
 
+abstract class AbstractLanguageModelTask implements ILanguageModelTask {
 	protected ?int $id;
-	protected int $status = self::STATUS_UNKNOWN;
+	protected int $status = ILanguageModelTask::STATUS_UNKNOWN;
 
-	public function __construct(
+	public final function __construct(
 		protected string $input,
 		protected string $appId,
 		protected ?string $userId,
 	) {
 	}
 
+	/**
+	 * @param ILanguageModelProvider $provider
+	 * @return string
+	 * @throws \RuntimeException
+	 */
 	abstract public function visitProvider(ILanguageModelProvider $provider): string;
 
+	abstract public function canUseProvider(ILanguageModelProvider $provider): bool;
+
+	abstract public function getType(): string;
+
 	/**
 	 * @return int
 	 */
-	public function getStatus(): int {
+	public final function getStatus(): int {
 		return $this->status;
 	}
 
 	/**
 	 * @param int $status
 	 */
-	public function setStatus(int $status): void {
+	public final function setStatus(int $status): void {
 		$this->status = $status;
 	}
 
 	/**
 	 * @return int|null
 	 */
-	public function getId(): ?int {
+	public final function getId(): ?int {
 		return $this->id;
 	}
 
 	/**
 	 * @param int|null $id
 	 */
-	public function setId(?int $id): void {
+	public final function setId(?int $id): void {
 		$this->id = $id;
 	}
 
 	/**
 	 * @return string
 	 */
-	public function getInput(): string {
+	public final function getInput(): string {
 		return $this->input;
 	}
 
 	/**
 	 * @return string
 	 */
-	public function getAppId(): string {
+	public final function getAppId(): string {
 		return $this->appId;
 	}
 
 	/**
 	 * @return string|null
 	 */
-	public function getUserId(): ?string {
+	public final function getUserId(): ?string {
 		return $this->userId;
 	}
+
+	public final static function fromTaskEntity(Task $taskEntity): ILanguageModelTask  {
+		$task = self::factory($taskEntity->getType(), $taskEntity->getInput(), $taskEntity->getuserId(), $taskEntity->getAppId());
+		$task->setId($taskEntity->getId());
+		$task->setStatus($taskEntity->getStatus());
+		return $task;
+	}
+
+	public final static function factory(string $type, string $input, ?string $userId, string $appId): ILanguageModelTask {
+		if (!in_array($type, self::TYPES)) {
+			throw new \InvalidArgumentException('Unknown task type');
+		}
+		return new ILanguageModelTask::TYPES[$type]($input, $userId, $appId);
+	}
 }
diff --git a/lib/public/LanguageModel/Events/AbstractLanguageModelEvent.php b/lib/public/LanguageModel/Events/AbstractLanguageModelEvent.php
index 3d274330dc7..218a4480081 100644
--- a/lib/public/LanguageModel/Events/AbstractLanguageModelEvent.php
+++ b/lib/public/LanguageModel/Events/AbstractLanguageModelEvent.php
@@ -26,7 +26,7 @@ declare(strict_types=1);
 namespace OCP\LanguageModel\Events;
 
 use OCP\EventDispatcher\Event;
-use OCP\LanguageModel\AbstractLanguageModelTask;
+use OCP\LanguageModel\ILanguageModelTask;
 
 /**
  * @since 28.0.0
@@ -36,16 +36,16 @@ abstract class AbstractLanguageModelEvent extends Event {
 	 * @since 28.0.0
 	 */
 	public function __construct(
-		private AbstractLanguageModelTask $task
+		private ILanguageModelTask $task
 	) {
 		parent::__construct();
 	}
 
 	/**
-	 * @return AbstractLanguageModelTask
+	 * @return ILanguageModelTask
 	 * @since 28.0.0
 	 */
-	public function getTask(): AbstractLanguageModelTask {
+	public function getTask(): ILanguageModelTask {
 		return $this->task;
 	}
 }
diff --git a/lib/public/LanguageModel/Events/TaskFailedEvent.php b/lib/public/LanguageModel/Events/TaskFailedEvent.php
index 2b0dea9153f..5134c37476a 100644
--- a/lib/public/LanguageModel/Events/TaskFailedEvent.php
+++ b/lib/public/LanguageModel/Events/TaskFailedEvent.php
@@ -2,14 +2,14 @@
 
 namespace OCP\LanguageModel\Events;
 
-use OCP\LanguageModel\AbstractLanguageModelTask;
+use OCP\LanguageModel\ILanguageModelTask;
 
 /**
  * @since 28.0.0
  */
 class TaskFailedEvent extends AbstractLanguageModelEvent {
 
-	public function __construct(AbstractLanguageModelTask $task,
+	public function __construct(ILanguageModelTask $task,
 								private string $errorMessage) {
 		parent::__construct($task);
 	}
diff --git a/lib/public/LanguageModel/Events/TaskSuccessfulEvent.php b/lib/public/LanguageModel/Events/TaskSuccessfulEvent.php
index 6cdb57143f9..156c5679e0b 100644
--- a/lib/public/LanguageModel/Events/TaskSuccessfulEvent.php
+++ b/lib/public/LanguageModel/Events/TaskSuccessfulEvent.php
@@ -2,14 +2,14 @@
 
 namespace OCP\LanguageModel\Events;
 
-use OCP\LanguageModel\AbstractLanguageModelTask;
+use OCP\LanguageModel\ILanguageModelTask;
 
 /**
  * @since 28.0.0
  */
 class TaskSuccessfulEvent extends AbstractLanguageModelEvent {
 
-	public function __construct(AbstractLanguageModelTask $task,
+	public function __construct(ILanguageModelTask $task,
 								private string $output) {
 		parent::__construct($task);
 	}
diff --git a/lib/public/LanguageModel/FreePromptTask.php b/lib/public/LanguageModel/FreePromptTask.php
index ff7fa7fffed..a179048631c 100644
--- a/lib/public/LanguageModel/FreePromptTask.php
+++ b/lib/public/LanguageModel/FreePromptTask.php
@@ -4,7 +4,8 @@ namespace OCP\LanguageModel;
 
 use RuntimeException;
 
-class FreePromptTask extends AbstractLanguageModelTask {
+final class FreePromptTask extends AbstractLanguageModelTask {
+	public const TYPE = 'free_prompt';
 
 	/**
 	 * @param ILanguageModelProvider $provider
@@ -12,14 +13,14 @@ class FreePromptTask extends AbstractLanguageModelTask {
 	 * @return string
 	 */
 	public function visitProvider(ILanguageModelProvider $provider): string {
-		$this->setStatus(self::STATUS_RUNNING);
-		try {
-			$output = $provider->prompt($this->getInput());
-		} catch (RuntimeException $e) {
-			$this->setStatus(self::STATUS_FAILED);
-			throw $e;
-		}
-		$this->setStatus(self::STATUS_SUCCESSFUL);
-		return $output;
+		return $provider->prompt($this->getInput());
+	}
+
+	public function canUseProvider(ILanguageModelProvider $provider): bool {
+		return true;
+	}
+
+	public function getType(): string {
+		return self::TYPE;
 	}
 }
diff --git a/lib/public/LanguageModel/ILanguageModelManager.php b/lib/public/LanguageModel/ILanguageModelManager.php
index e0d33777052..a4d3079c180 100644
--- a/lib/public/LanguageModel/ILanguageModelManager.php
+++ b/lib/public/LanguageModel/ILanguageModelManager.php
@@ -27,6 +27,7 @@ declare(strict_types=1);
 namespace OCP\LanguageModel;
 
 use InvalidArgumentException;
+use OCP\LanguageModel\AbstractLanguageModelTask;
 use OCP\LanguageModel\Events\AbstractLanguageModelEvent;
 use OCP\PreConditionNotMetException;
 use RuntimeException;
@@ -45,11 +46,10 @@ interface ILanguageModelManager {
 
 	/**
 	 * @throws PreConditionNotMetException If no or not the requested provider was registered but this method was still called
-	 * @throws InvalidArgumentException If the file could not be found or is not of a supported type
-	 * @throws RuntimeException If the transcription failed for other reasons
+	 * @throws RuntimeException If something else failed
 	 * @since 28.0.0
 	 */
-	public function runTask(AbstractLanguageModelTask $task): AbstractLanguageModelEvent;
+	public function runTask(ILanguageModelTask $task): string;
 
 	/**
 	 * Will schedule an LLM inference process in the background. The result will become available
@@ -58,5 +58,7 @@ interface ILanguageModelManager {
 	 * @throws PreConditionNotMetException If no or not the requested provider was registered but this method was still called
 	 * @since 28.0.0
 	 */
-	public function scheduleTask(AbstractLanguageModelTask $task) : void;
+	public function scheduleTask(ILanguageModelTask $task) : void;
+
+	public function getTask(int $id): ILanguageModelTask;
 }
diff --git a/lib/public/LanguageModel/ILanguageModelTask.php b/lib/public/LanguageModel/ILanguageModelTask.php
new file mode 100644
index 00000000000..478ee54e8a3
--- /dev/null
+++ b/lib/public/LanguageModel/ILanguageModelTask.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace OCP\LanguageModel;
+
+interface ILanguageModelTask {
+	public const STATUS_FAILED = 4;
+	public const STATUS_SUCCESSFUL = 3;
+	public const STATUS_RUNNING = 2;
+	public const STATUS_SCHEDULED = 1;
+	public const STATUS_UNKNOWN = 0;
+
+	public const TYPES = [
+		SummaryTask::TYPE => SummaryTask::class,
+		FreePromptTask::TYPE => FreePromptTask::class,
+	];
+
+	/**
+	 * @return string
+	 */
+	public function getType(): string;
+
+	/**
+	 * @return int
+	 */
+	public function getStatus(): int;
+
+	/**
+	 * @param int $status
+	 */
+	public function setStatus(int $status): void;
+
+	/**
+	 * @param int|null $id
+	 */
+	public function setId(?int $id): void;
+
+	/**
+	 * @return int|null
+	 */
+	public function getId(): ?int;
+
+	/**
+	 * @return string
+	 */
+	public function getInput(): string;
+
+	/**
+	 * @return string
+	 */
+	public function getAppId(): string;
+
+	/**
+	 * @return string|null
+	 */
+	public function getUserId(): ?string;
+}
diff --git a/lib/public/LanguageModel/SummaryTask.php b/lib/public/LanguageModel/SummaryTask.php
index 0037beb4593..35f20cebfb6 100644
--- a/lib/public/LanguageModel/SummaryTask.php
+++ b/lib/public/LanguageModel/SummaryTask.php
@@ -4,7 +4,8 @@ namespace OCP\LanguageModel;
 
 use RuntimeException;
 
-class SummaryTask extends AbstractLanguageModelTask {
+final class SummaryTask extends AbstractLanguageModelTask {
+	public const TYPE = 'summarize';
 
 	/**
 	 * @param ILanguageModelProvider&ISummaryProvider $provider
@@ -15,14 +16,14 @@ class SummaryTask extends AbstractLanguageModelTask {
 		if (!$provider instanceof ISummaryProvider) {
 			throw new \RuntimeException('SummaryTask#visitProvider expects ISummaryProvider');
 		}
-		$this->setStatus(self::STATUS_RUNNING);
-		try {
-			$output = $provider->summarize($this->getInput());
-		} catch (RuntimeException $e) {
-			$this->setStatus(self::STATUS_FAILED);
-			throw $e;
-		}
-		$this->setStatus(self::STATUS_SUCCESSFUL);
-		return $output;
+		return $provider->summarize($this->getInput());
+	}
+
+	public function canUseProvider(ILanguageModelProvider $provider): bool {
+		return $provider instanceof ISummaryProvider;
+	}
+
+	public function getType(): string {
+		return self::TYPE;
 	}
 }