FileUploader::getAutoWiredParameters

public function getAutoWiredParameters(): array
{
	$request = $this->getRequest();

	return [
		new ExactParameter(
			UploaderController::class,
			'controller',
			function ($className, string $controller, string $controllerOptions = null) {
				try
				{
					$options = empty($controllerOptions) ? [] : Json::decode($controllerOptions);
					$options = is_array($options) ? $options : [];
				}
				catch (Exception $e)
				{
					$options = [];
				}

				if (is_subclass_of($this, FileUploader::class))
				{
					$availableControllers = $this->getAvailableControllers();
					if ($availableControllers === null)
					{
						$this->addError(new Error(
							'You have to override "getAvailableControllers" method for your custom ajax controller.'
						));

						return null;
					}

					[$moduleId, $className] = ControllerResolver::resolveName($controller);
					$className = strtolower(ltrim($className, '\'));

					$availableNames = array_map(function($name) {
						return strtolower(ltrim($name, '\'));
					}, $availableControllers);

					if (
						!in_array(strtolower($controller), $availableNames)
						&& !in_array($className, $availableNames)
					)
					{
						$this->addError(new Error('Invalid Controller Name.'));

						return null;
					}
				}

				return ControllerResolver::createController($controller, $options);
			}
		),
		new Parameter(
			Chunk::class,
			function ($className) use ($request) {
				$result = Chunk::createFromRequest($request);
				if ($result->isSuccess())
				{
					return $result->getData()['chunk'];
				}
				else
				{
					$this->addErrors($result->getErrors());

					return null;
				}
			}
		),
	];
}