class UpdateController

class UpdateController extends ControllerBase {
    
    /**
     * Update manager service.
     *
     * @var \Drupal\update\UpdateManagerInterface
     */
    protected $updateManager;
    
    /**
     * The renderer.
     *
     * @var \Drupal\Core\Render\RendererInterface
     */
    protected $renderer;
    
    /**
     * Constructs update status data.
     *
     * @param \Drupal\update\UpdateManagerInterface $update_manager
     *   Update Manager Service.
     * @param \Drupal\Core\Render\RendererInterface|null $renderer
     *   The renderer.
     */
    public function __construct(UpdateManagerInterface $update_manager, RendererInterface $renderer = NULL) {
        $this->updateManager = $update_manager;
        if (is_null($renderer)) {
            @trigger_error('The renderer service should be passed to UpdateController::__construct() since 9.1.0. This will be required in Drupal 10.0.0. See https://www.drupal.org/node/3179315', E_USER_DEPRECATED);
            $renderer = \Drupal::service('renderer');
        }
        $this->renderer = $renderer;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('update.manager'), $container->get('renderer'));
    }
    
    /**
     * Returns a page about the update status of projects.
     *
     * @return array
     *   A build array with the update status of projects.
     */
    public function updateStatus() {
        $build = [
            '#theme' => 'update_report',
        ];
        if ($available = update_get_available(TRUE)) {
            $this->moduleHandler()
                ->loadInclude('update', 'compare.inc');
            $build['#data'] = update_calculate_project_data($available);
            // @todo Consider using 'fetch_failures' from the 'update' collection
            // in the key_value_expire service for this?
            $fetch_failed = FALSE;
            foreach ($build['#data'] as $project) {
                if ($project['status'] === UpdateFetcherInterface::NOT_FETCHED) {
                    $fetch_failed = TRUE;
                    break;
                }
            }
            if ($fetch_failed) {
                $message = [
                    '#theme' => 'update_fetch_error_message',
                ];
                $this->messenger()
                    ->addError($this->renderer
                    ->renderPlain($message));
            }
        }
        return $build;
    }
    
    /**
     * Manually checks the update status without the use of cron.
     */
    public function updateStatusManually() {
        $this->updateManager
            ->refreshUpdateData();
        $batch_builder = (new BatchBuilder())->setTitle(t('Checking available update data'))
            ->addOperation([
            $this->updateManager,
            'fetchDataBatch',
        ], [])
            ->setProgressMessage(t('Trying to check available update data ...'))
            ->setErrorMessage(t('Error checking available update data.'))
            ->setFinishCallback('update_fetch_data_finished');
        batch_set($batch_builder->toArray());
        return batch_process('admin/reports/updates');
    }

}