Migrate Repair events to OCP\EventDispatcher\Event

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

core/Command/Maintenance/Repair.php

 
 use Exception;
 use OCP\App\IAppManager;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IConfig;
+use OC\Repair\Events\RepairAdvanceEvent;
+use OC\Repair\Events\RepairErrorEvent;
+use OC\Repair\Events\RepairFinishEvent;
+use OC\Repair\Events\RepairInfoEvent;
+use OC\Repair\Events\RepairStartEvent;
+use OC\Repair\Events\RepairStepEvent;
+use OC\Repair\Events\RepairWarningEvent;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Helper\ProgressBar;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
-use Symfony\Component\EventDispatcher\EventDispatcherInterface;
-use Symfony\Component\EventDispatcher\GenericEvent;
 
 class Repair extends Command {
 	protected \OC\Repair $repair;
 	protected IConfig $config;
-	private EventDispatcherInterface $dispatcher;
+	private IEventDispatcher $dispatcher;
 	private ProgressBar $progress;
 	private OutputInterface $output;
 	private IAppManager $appManager;
 
-	public function __construct(\OC\Repair $repair, IConfig $config, EventDispatcherInterface $dispatcher, IAppManager $appManager) {
+	public function __construct(\OC\Repair $repair, IConfig $config, IEventDispatcher $dispatcher, IAppManager $appManager) {
 		$this->repair = $repair;
 		$this->config = $config;
 		$this->dispatcher = $dispatcher;
 
 		$this->progress = new ProgressBar($output);
 		$this->output = $output;
-		$this->dispatcher->addListener('\OC\Repair::startProgress', [$this, 'handleRepairFeedBack']);
-		$this->dispatcher->addListener('\OC\Repair::advance', [$this, 'handleRepairFeedBack']);
-		$this->dispatcher->addListener('\OC\Repair::finishProgress', [$this, 'handleRepairFeedBack']);
-		$this->dispatcher->addListener('\OC\Repair::step', [$this, 'handleRepairFeedBack']);
-		$this->dispatcher->addListener('\OC\Repair::info', [$this, 'handleRepairFeedBack']);
-		$this->dispatcher->addListener('\OC\Repair::warning', [$this, 'handleRepairFeedBack']);
-		$this->dispatcher->addListener('\OC\Repair::error', [$this, 'handleRepairFeedBack']);
+		$this->dispatcher->addListener(RepairStartEvent::class, [$this, 'handleRepairFeedBack']);
+		$this->dispatcher->addListener(RepairAdvanceEvent::class, [$this, 'handleRepairFeedBack']);
+		$this->dispatcher->addListener(RepairFinishEvent::class, [$this, 'handleRepairFeedBack']);
+		$this->dispatcher->addListener(RepairStepEvent::class, [$this, 'handleRepairFeedBack']);
+		$this->dispatcher->addListener(RepairInfoEvent::class, [$this, 'handleRepairFeedBack']);
+		$this->dispatcher->addListener(RepairWarningEvent::class, [$this, 'handleRepairFeedBack']);
+		$this->dispatcher->addListener(RepairErrorEvent::class, [$this, 'handleRepairFeedBack']);
 
 		$this->repair->run();
 
 		return 0;
 	}
 
-	public function handleRepairFeedBack($event) {
-		if (!$event instanceof GenericEvent) {
-			return;
-		}
-		switch ($event->getSubject()) {
-			case '\OC\Repair::startProgress':
-				$this->progress->start($event->getArgument('max'));
-				break;
-			case '\OC\Repair::advance':
-				$this->progress->advance($event->getArgument('step'));
-				break;
-			case '\OC\Repair::finishProgress':
-				$this->progress->finish();
-				$this->output->writeln('');
-				break;
-			case '\OC\Repair::step':
-				$this->output->writeln(' - ' . $event->getArgument('step'));
-				break;
-			case '\OC\Repair::info':
-				$this->output->writeln('     - ' . $event->getArgument('message'));
-				break;
-			case '\OC\Repair::warning':
-				$this->output->writeln('     - WARNING: ' . $event->getArgument('message'));
-				break;
-			case '\OC\Repair::error':
-				$this->output->writeln('<error>     - ERROR: ' . $event->getArgument('message') . '</error>');
-				break;
+	public function handleRepairFeedBack(Event $event): void {
+		if ($event instanceof RepairStartEvent) {
+			$this->progress->start($event->getMaxStep());
+		} elseif ($event instanceof RepairAdvanceEvent) {
+			$this->progress->advance($event->getCurrentStep());
+		} elseif ($event instanceof RepairFinishEvent) {
+			$this->progress->finish();
+			$this->output->writeln('');
+		} elseif ($event instanceof RepairStepEvent) {
+			$this->output->writeln(' - ' . $event->getStepName());
+		} elseif ($event instanceof RepairInfoEvent) {
+			$this->output->writeln('     - ' . $event->getMessage());
+		} elseif ($event instanceof RepairWarningEvent) {
+			$this->output->writeln('     - WARNING: ' . $event->getMessage());
+		} elseif ($event instanceof RepairErrorEvent) {
+			$this->output->writeln('<error>     - ERROR: ' . $event->getMessage() . '</error>');
 		}
 	}
 }

core/Command/Upgrade.php

  */
 namespace OC\Core\Command;
 
+use OCP\EventDispatcher\Event;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IConfig;
 use OCP\Util;
 use OC\Console\TimestampFormatter;
 use OC\DB\MigratorExecuteSqlEvent;
 use OC\Installer;
+use OC\Repair\Events\RepairAdvanceEvent;
+use OC\Repair\Events\RepairErrorEvent;
+use OC\Repair\Events\RepairFinishEvent;
+use OC\Repair\Events\RepairInfoEvent;
+use OC\Repair\Events\RepairStartEvent;
+use OC\Repair\Events\RepairStepEvent;
+use OC\Repair\Events\RepairWarningEvent;
 use OC\Updater;
 use Psr\Log\LoggerInterface;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Helper\ProgressBar;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
-use Symfony\Component\EventDispatcher\GenericEvent;
 
 class Upgrade extends Command {
 	public const ERROR_SUCCESS = 0;
 					$this->installer
 			);
 
-			$dispatcher = \OC::$server->getEventDispatcher();
-			/** @var IEventDispatcher $newDispatcher */
-			$newDispatcher = \OC::$server->get(IEventDispatcher::class);
+			/** @var IEventDispatcher $dispatcher */
+			$dispatcher = \OC::$server->get(IEventDispatcher::class);
 			$progress = new ProgressBar($output);
 			$progress->setFormat(" %message%\n %current%/%max% [%bar%] %percent:3s%%");
 			$listener = function (MigratorExecuteSqlEvent $event) use ($progress, $output) {
 					}
 				}
 			};
-			$repairListener = function ($event) use ($progress, $output) {
-				if (!$event instanceof GenericEvent) {
-					return;
-				}
-				switch ($event->getSubject()) {
-					case '\OC\Repair::startProgress':
-						$progress->setMessage('Starting ...');
-						$output->writeln($event->getArgument('step'));
-						$output->writeln('');
-						$progress->start($event->getArgument('max'));
-						break;
-					case '\OC\Repair::advance':
-						$desc = $event->getArgument('desc');
-						if (!empty($desc)) {
-							$progress->setMessage($desc);
-						}
-						$progress->advance($event->getArgument('step'));
-
-						break;
-					case '\OC\Repair::finishProgress':
-						$progress->setMessage('Done');
-						$progress->finish();
-						$output->writeln('');
-						break;
-					case '\OC\Repair::step':
-						if (OutputInterface::VERBOSITY_NORMAL < $output->getVerbosity()) {
-							$output->writeln('<info>Repair step: ' . $event->getArgument('step') . '</info>');
-						}
-						break;
-					case '\OC\Repair::info':
-						if (OutputInterface::VERBOSITY_NORMAL < $output->getVerbosity()) {
-							$output->writeln('<info>Repair info: ' . $event->getArgument('message') . '</info>');
-						}
-						break;
-					case '\OC\Repair::warning':
-						$output->writeln('<error>Repair warning: ' . $event->getArgument('message') . '</error>');
-						break;
-					case '\OC\Repair::error':
-						$output->writeln('<error>Repair error: ' . $event->getArgument('message') . '</error>');
-						break;
+			$repairListener = function (Event $event) use ($progress, $output) {
+				if ($event instanceof RepairStartEvent) {
+					$progress->setMessage('Starting ...');
+					$output->writeln($event->getCurrentStepName());
+					$output->writeln('');
+					$progress->start($event->getMaxStep());
+				} elseif ($event instanceof RepairAdvanceEvent) {
+					$desc = $event->getDescription();
+					if (!empty($desc)) {
+						$progress->setMessage($desc);
+					}
+					$progress->advance($event->getCurrentStep());
+				} elseif ($event instanceof RepairFinishEvent) {
+					$progress->setMessage('Done');
+					$progress->finish();
+					$output->writeln('');
+				} elseif ($event instanceof RepairStepEvent) {
+					if (OutputInterface::VERBOSITY_NORMAL < $output->getVerbosity()) {
+						$output->writeln('<info>Repair step: ' . $event->getStepName() . '</info>');
+					}
+				} elseif ($event instanceof RepairInfoEvent) {
+					if (OutputInterface::VERBOSITY_NORMAL < $output->getVerbosity()) {
+						$output->writeln('<info>Repair info: ' . $event->getMessage() . '</info>');
+					}
+				} elseif ($event instanceof RepairWarningEvent) {
+					$output->writeln('<error>Repair warning: ' . $event->getMessage() . '</error>');
+				} elseif ($event instanceof RepairErrorEvent) {
+					$output->writeln('<error>Repair error: ' . $event->getMessage() . '</error>');
 				}
 			};
 
-			$newDispatcher->addListener(MigratorExecuteSqlEvent::class, $listener);
-			$dispatcher->addListener('\OC\Repair::startProgress', $repairListener);
-			$dispatcher->addListener('\OC\Repair::advance', $repairListener);
-			$dispatcher->addListener('\OC\Repair::finishProgress', $repairListener);
-			$dispatcher->addListener('\OC\Repair::step', $repairListener);
-			$dispatcher->addListener('\OC\Repair::info', $repairListener);
-			$dispatcher->addListener('\OC\Repair::warning', $repairListener);
-			$dispatcher->addListener('\OC\Repair::error', $repairListener);
+			$dispatcher->addListener(MigratorExecuteSqlEvent::class, $listener);
+			$dispatcher->addListener(RepairStartEvent::class, $repairListener);
+			$dispatcher->addListener(RepairAdvanceEvent::class, $repairListener);
+			$dispatcher->addListener(RepairFinishEvent::class, $repairListener);
+			$dispatcher->addListener(RepairStepEvent::class, $repairListener);
+			$dispatcher->addListener(RepairInfoEvent::class, $repairListener);
+			$dispatcher->addListener(RepairWarningEvent::class, $repairListener);
+			$dispatcher->addListener(RepairErrorEvent::class, $repairListener);
 
 
 			$updater->listen('\OC\Updater', 'maintenanceEnabled', function () use ($output) {

core/ajax/update.php

  * along with this program. If not, see <http://www.gnu.org/licenses/>
  *
  */
+use OCP\EventDispatcher\Event;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IEventSource;
 use OCP\IL10N;
 use OCP\ILogger;
 use OC\DB\MigratorExecuteSqlEvent;
-use Symfony\Component\EventDispatcher\GenericEvent;
+use OC\Repair\Events\RepairAdvanceEvent;
+use OC\Repair\Events\RepairErrorEvent;
+use OC\Repair\Events\RepairFinishEvent;
+use OC\Repair\Events\RepairInfoEvent;
+use OC\Repair\Events\RepairStartEvent;
+use OC\Repair\Events\RepairStepEvent;
+use OC\Repair\Events\RepairWarningEvent;
 
 if (strpos(@ini_get('disable_functions'), 'set_time_limit') === false) {
 	@set_time_limit(0);
 		$this->l10n = $l10n;
 	}
 
-	public function handleRepairFeedback($event): void {
-		if (!$event instanceof GenericEvent) {
-			return;
-		}
-
-		switch ($event->getSubject()) {
-			case '\OC\Repair::startProgress':
-				$this->progressStateMax = $event->getArgument('max');
-				$this->progressStateStep = 0;
-				$this->currentStep = (string)$event->getArgument('step');
-				break;
-			case '\OC\Repair::advance':
-				$this->progressStateStep += $event->getArgument('step');
-				$desc = $event->getArgument('desc');
-				if (empty($desc)) {
-					$desc = $this->currentStep;
-				}
-				$this->eventSource->send('success', $this->l10n->t('[%d / %d]: %s', [$this->progressStateStep, $this->progressStateMax, $desc]));
-				break;
-			case '\OC\Repair::finishProgress':
-				$this->progressStateMax = $this->progressStateStep;
-				$this->eventSource->send('success', $this->l10n->t('[%d / %d]: %s', [$this->progressStateStep, $this->progressStateMax, $this->currentStep]));
-				break;
-			case '\OC\Repair::step':
-				$this->eventSource->send('success', $this->l10n->t('Repair step:') . ' ' . $event->getArgument('step'));
-				break;
-			case '\OC\Repair::info':
-				$this->eventSource->send('success', $this->l10n->t('Repair info:') . ' ' . $event->getArgument('message'));
-				break;
-			case '\OC\Repair::warning':
-				$this->eventSource->send('notice', $this->l10n->t('Repair warning:') . ' ' . $event->getArgument('message'));
-				break;
-			case '\OC\Repair::error':
-				$this->eventSource->send('notice', $this->l10n->t('Repair error:') . ' ' . $event->getArgument('message'));
-				break;
+	public function handleRepairFeedback(Event $event): void {
+		if ($event instanceof RepairStartEvent) {
+			$this->progressStateMax = $event->getMaxStep();
+			$this->progressStateStep = 0;
+			$this->currentStep = $event->getCurrentStepName();
+		} elseif ($event instanceof RepairAdvanceEvent) {
+			$this->progressStateStep += $event->getCurrentStep();
+			$desc = $event->getDescription();
+			if (empty($desc)) {
+				$desc = $this->currentStep;
+			}
+			$this->eventSource->send('success', $this->l10n->t('[%d / %d]: %s', [$this->progressStateStep, $this->progressStateMax, $desc]));
+		} elseif ($event instanceof RepairFinishEvent) {
+			$this->progressStateMax = $this->progressStateStep;
+			$this->eventSource->send('success', $this->l10n->t('[%d / %d]: %s', [$this->progressStateStep, $this->progressStateMax, $this->currentStep]));
+		} elseif ($event instanceof RepairStepEvent) {
+			$this->eventSource->send('success', $this->l10n->t('Repair step:') . ' ' . $event->getStepName());
+		} elseif ($event instanceof RepairInfoEvent) {
+			$this->eventSource->send('success', $this->l10n->t('Repair info:') . ' ' . $event->getMessage());
+		} elseif ($event instanceof RepairWarningEvent) {
+			$this->eventSource->send('notice', $this->l10n->t('Repair warning:') . ' ' . $event->getMessage());
+		} elseif ($event instanceof RepairErrorEvent) {
+			$this->eventSource->send('notice', $this->l10n->t('Repair error:') . ' ' . $event->getMessage());
 		}
 	}
 }
 	);
 	$incompatibleApps = [];
 
-	$dispatcher = \OC::$server->getEventDispatcher();
-	/** @var IEventDispatcher $newDispatcher */
-	$newDispatcher = \OC::$server->get(IEventDispatcher::class);
-	$newDispatcher->addListener(MigratorExecuteSqlEvent::class, function (MigratorExecuteSqlEvent $event) use ($eventSource, $l) {
+	/** @var IEventDispatcher $dispatcher */
+	$dispatcher = \OC::$server->get(IEventDispatcher::class);
+	$dispatcher->addListener(MigratorExecuteSqlEvent::class, function (MigratorExecuteSqlEvent $event) use ($eventSource, $l) {
 		$eventSource->send('success', $l->t('[%d / %d]: %s', [$event->getCurrentStep(), $event->getMaxStep(), $event->getSql()]));
 	});
 	$feedBack = new FeedBackHandler($eventSource, $l);
-	$dispatcher->addListener('\OC\Repair::startProgress', [$feedBack, 'handleRepairFeedback']);
-	$dispatcher->addListener('\OC\Repair::advance', [$feedBack, 'handleRepairFeedback']);
-	$dispatcher->addListener('\OC\Repair::finishProgress', [$feedBack, 'handleRepairFeedback']);
-	$dispatcher->addListener('\OC\Repair::step', [$feedBack, 'handleRepairFeedback']);
-	$dispatcher->addListener('\OC\Repair::info', [$feedBack, 'handleRepairFeedback']);
-	$dispatcher->addListener('\OC\Repair::warning', [$feedBack, 'handleRepairFeedback']);
-	$dispatcher->addListener('\OC\Repair::error', [$feedBack, 'handleRepairFeedback']);
+	$dispatcher->addListener(RepairStartEvent::class, [$feedBack, 'handleRepairFeedback']);
+	$dispatcher->addListener(RepairAdvanceEvent::class, [$feedBack, 'handleRepairFeedback']);
+	$dispatcher->addListener(RepairFinishEvent::class, [$feedBack, 'handleRepairFeedback']);
+	$dispatcher->addListener(RepairStepEvent::class, [$feedBack, 'handleRepairFeedback']);
+	$dispatcher->addListener(RepairInfoEvent::class, [$feedBack, 'handleRepairFeedback']);
+	$dispatcher->addListener(RepairWarningEvent::class, [$feedBack, 'handleRepairFeedback']);
+	$dispatcher->addListener(RepairErrorEvent::class, [$feedBack, 'handleRepairFeedback']);
 
 	$updater->listen('\OC\Updater', 'maintenanceEnabled', function () use ($eventSource, $l) {
 		$eventSource->send('success', $l->t('Turned on maintenance mode'));

core/register_command.php

 
 	$application->add(new OC\Core\Command\Upgrade(\OC::$server->getConfig(), \OC::$server->get(LoggerInterface::class), \OC::$server->query(\OC\Installer::class)));
 	$application->add(new OC\Core\Command\Maintenance\Repair(
-		new \OC\Repair([], \OC::$server->getEventDispatcher(), \OC::$server->get(LoggerInterface::class)),
+		new \OC\Repair([], \OC::$server->get(\OCP\EventDispatcher\IEventDispatcher::class), \OC::$server->get(LoggerInterface::class)),
 		\OC::$server->getConfig(),
-		\OC::$server->getEventDispatcher(),
+		\OC::$server->get(\OCP\EventDispatcher\IEventDispatcher::class),
 		\OC::$server->getAppManager()
 	));
 

lib/composer/composer/autoload_classmap.php

     'OC\\Repair\\ClearFrontendCaches' => $baseDir . '/lib/private/Repair/ClearFrontendCaches.php',
     'OC\\Repair\\ClearGeneratedAvatarCache' => $baseDir . '/lib/private/Repair/ClearGeneratedAvatarCache.php',
     'OC\\Repair\\Collation' => $baseDir . '/lib/private/Repair/Collation.php',
+    'OC\\Repair\\Events\\RepairAdvanceEvent' => $baseDir . '/lib/private/Repair/Events/RepairAdvanceEvent.php',
+    'OC\\Repair\\Events\\RepairErrorEvent' => $baseDir . '/lib/private/Repair/Events/RepairErrorEvent.php',
+    'OC\\Repair\\Events\\RepairFinishEvent' => $baseDir . '/lib/private/Repair/Events/RepairFinishEvent.php',
+    'OC\\Repair\\Events\\RepairInfoEvent' => $baseDir . '/lib/private/Repair/Events/RepairInfoEvent.php',
+    'OC\\Repair\\Events\\RepairStartEvent' => $baseDir . '/lib/private/Repair/Events/RepairStartEvent.php',
+    'OC\\Repair\\Events\\RepairStepEvent' => $baseDir . '/lib/private/Repair/Events/RepairStepEvent.php',
+    'OC\\Repair\\Events\\RepairWarningEvent' => $baseDir . '/lib/private/Repair/Events/RepairWarningEvent.php',
     'OC\\Repair\\MoveUpdaterStepFile' => $baseDir . '/lib/private/Repair/MoveUpdaterStepFile.php',
     'OC\\Repair\\NC11\\FixMountStorages' => $baseDir . '/lib/private/Repair/NC11/FixMountStorages.php',
     'OC\\Repair\\NC13\\AddLogRotateJob' => $baseDir . '/lib/private/Repair/NC13/AddLogRotateJob.php',

lib/composer/composer/autoload_static.php

         'OC\\Repair\\ClearFrontendCaches' => __DIR__ . '/../../..' . '/lib/private/Repair/ClearFrontendCaches.php',
         'OC\\Repair\\ClearGeneratedAvatarCache' => __DIR__ . '/../../..' . '/lib/private/Repair/ClearGeneratedAvatarCache.php',
         'OC\\Repair\\Collation' => __DIR__ . '/../../..' . '/lib/private/Repair/Collation.php',
+        'OC\\Repair\\Events\\RepairAdvanceEvent' => __DIR__ . '/../../..' . '/lib/private/Repair/Events/RepairAdvanceEvent.php',
+        'OC\\Repair\\Events\\RepairErrorEvent' => __DIR__ . '/../../..' . '/lib/private/Repair/Events/RepairErrorEvent.php',
+        'OC\\Repair\\Events\\RepairFinishEvent' => __DIR__ . '/../../..' . '/lib/private/Repair/Events/RepairFinishEvent.php',
+        'OC\\Repair\\Events\\RepairInfoEvent' => __DIR__ . '/../../..' . '/lib/private/Repair/Events/RepairInfoEvent.php',
+        'OC\\Repair\\Events\\RepairStartEvent' => __DIR__ . '/../../..' . '/lib/private/Repair/Events/RepairStartEvent.php',
+        'OC\\Repair\\Events\\RepairStepEvent' => __DIR__ . '/../../..' . '/lib/private/Repair/Events/RepairStepEvent.php',
+        'OC\\Repair\\Events\\RepairWarningEvent' => __DIR__ . '/../../..' . '/lib/private/Repair/Events/RepairWarningEvent.php',
         'OC\\Repair\\MoveUpdaterStepFile' => __DIR__ . '/../../..' . '/lib/private/Repair/MoveUpdaterStepFile.php',
         'OC\\Repair\\NC11\\FixMountStorages' => __DIR__ . '/../../..' . '/lib/private/Repair/NC11/FixMountStorages.php',
         'OC\\Repair\\NC13\\AddLogRotateJob' => __DIR__ . '/../../..' . '/lib/private/Repair/NC13/AddLogRotateJob.php',

lib/private/DB/Connection.php

 		$random = \OC::$server->getSecureRandom();
 		$platform = $this->getDatabasePlatform();
 		$config = \OC::$server->getConfig();
-		$dispatcher = \OC::$server->getEventDispatcher();
+		$dispatcher = \OC::$server->get(\OCP\EventDispatcher\IEventDispatcher::class);
 		if ($platform instanceof SqlitePlatform) {
 			return new SQLiteMigrator($this, $config, $dispatcher);
 		} elseif ($platform instanceof OraclePlatform) {

lib/private/DB/MigratorExecuteSqlEvent.php

 	public function __construct(
 		string $sql,
 		int $current,
-		int $max,
+		int $max
 	) {
 		$this->sql = $sql;
 		$this->current = $current;

lib/private/Migration/BackgroundRepair.php

  */
 namespace OC\Migration;
 
-use OC\NeedsUpdateException;
-use OC\Repair;
-use OC_App;
 use OCP\AppFramework\Utility\ITimeFactory;
 use OCP\BackgroundJob\IJobList;
 use OCP\BackgroundJob\TimedJob;
+use OCP\EventDispatcher\IEventDispatcher;
+use OC\NeedsUpdateException;
+use OC\Repair;
+use OC_App;
 use Psr\Log\LoggerInterface;
-use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 
 /**
  * Class BackgroundRepair
 class BackgroundRepair extends TimedJob {
 	private IJobList $jobList;
 	private LoggerInterface $logger;
-	private EventDispatcherInterface $dispatcher;
+	private IEventDispatcher $dispatcher;
 
-	public function __construct(EventDispatcherInterface $dispatcher, ITimeFactory $time, LoggerInterface $logger, IJobList $jobList) {
+	public function __construct(IEventDispatcher $dispatcher, ITimeFactory $time, LoggerInterface $logger, IJobList $jobList) {
 		parent::__construct($time);
 		$this->dispatcher = $dispatcher;
 		$this->logger = $logger;

lib/private/Repair.php

  */
 namespace OC;
 
+use OCP\AppFramework\QueryException;
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\Collaboration\Resources\IManager;
+use OCP\EventDispatcher\IEventDispatcher;
+use OCP\Migration\IOutput;
+use OCP\Migration\IRepairStep;
 use OC\App\AppStore\Bundles\BundleFetcher;
 use OC\Avatar\AvatarManager;
 use OC\DB\Connection;
 use OC\Repair\ClearFrontendCaches;
 use OC\Repair\ClearGeneratedAvatarCache;
 use OC\Repair\Collation;
+use OC\Repair\Events\RepairAdvanceEvent;
+use OC\Repair\Events\RepairErrorEvent;
+use OC\Repair\Events\RepairFinishEvent;
+use OC\Repair\Events\RepairInfoEvent;
+use OC\Repair\Events\RepairStartEvent;
+use OC\Repair\Events\RepairStepEvent;
+use OC\Repair\Events\RepairWarningEvent;
 use OC\Repair\MoveUpdaterStepFile;
-use OC\Repair\NC22\LookupServerSendCheck;
-use OC\Repair\NC24\AddTokenCleanupJob;
-use OC\Repair\Owncloud\CleanPreviews;
-use OC\Repair\Owncloud\MigrateOauthTables;
 use OC\Repair\NC11\FixMountStorages;
-use OC\Repair\Owncloud\MoveAvatars;
-use OC\Repair\Owncloud\InstallCoreBundle;
-use OC\Repair\Owncloud\UpdateLanguageCodes;
 use OC\Repair\NC13\AddLogRotateJob;
 use OC\Repair\NC14\AddPreviewBackgroundCleanupJob;
 use OC\Repair\NC16\AddClenupLoginFlowV2BackgroundJob;
 use OC\Repair\NC20\ShippedDashboardEnable;
 use OC\Repair\NC21\AddCheckForUserCertificatesJob;
 use OC\Repair\NC21\ValidatePhoneNumber;
+use OC\Repair\NC22\LookupServerSendCheck;
+use OC\Repair\NC24\AddTokenCleanupJob;
 use OC\Repair\OldGroupMembershipShares;
+use OC\Repair\Owncloud\CleanPreviews;
 use OC\Repair\Owncloud\DropAccountTermsTable;
+use OC\Repair\Owncloud\InstallCoreBundle;
+use OC\Repair\Owncloud\MigrateOauthTables;
+use OC\Repair\Owncloud\MoveAvatars;
 use OC\Repair\Owncloud\SaveAccountsTableData;
+use OC\Repair\Owncloud\UpdateLanguageCodes;
 use OC\Repair\RemoveLinkShares;
 use OC\Repair\RepairDavShares;
 use OC\Repair\RepairInvalidShares;
 use OC\Repair\RepairMimeTypes;
 use OC\Repair\SqliteAutoincrement;
 use OC\Template\JSCombiner;
-use OCP\AppFramework\QueryException;
-use OCP\AppFramework\Utility\ITimeFactory;
-use OCP\Collaboration\Resources\IManager;
-use OCP\Migration\IOutput;
-use OCP\Migration\IRepairStep;
 use Psr\Log\LoggerInterface;
-use Symfony\Component\EventDispatcher\EventDispatcherInterface;
-use Symfony\Component\EventDispatcher\GenericEvent;
 use Throwable;
 
 class Repair implements IOutput {
 	/** @var IRepairStep[] */
 	private $repairSteps;
 
-	/** @var EventDispatcherInterface */
-	private $dispatcher;
+	private IEventDispatcher $dispatcher;
 
 	/** @var string */
 	private $currentStep;
 	 *
 	 * @param IRepairStep[] $repairSteps array of RepairStep instances
 	 */
-	public function __construct(array $repairSteps, EventDispatcherInterface $dispatcher, LoggerInterface $logger) {
+	public function __construct(array $repairSteps, IEventDispatcher $dispatcher, LoggerInterface $logger) {
 		$this->repairSteps = $repairSteps;
 		$this->dispatcher = $dispatcher;
 		$this->logger = $logger;
 	 */
 	public function run() {
 		if (count($this->repairSteps) === 0) {
-			$this->emit('\OC\Repair', 'info', ['message' => 'No repair steps available']);
+			$this->dispatcher->dispatchTyped(new RepairInfoEvent('No repair steps available'));
 
 			return;
 		}
 		// run each repair step
 		foreach ($this->repairSteps as $step) {
 			$this->currentStep = $step->getName();
-			$this->emit('\OC\Repair', 'step', ['step' => $this->currentStep]);
+			$this->dispatcher->dispatchTyped(new RepairStepEvent($this->currentStep));
 			try {
 				$step->run($this);
 			} catch (\Exception $e) {
 				$this->logger->error("Exception while executing repair step " . $step->getName(), ['exception' => $e]);
-				$this->emit('\OC\Repair', 'error', ['message' => $e->getMessage()]);
+				$this->dispatcher->dispatchTyped(new RepairErrorEvent($e->getMessage()));
 			}
 		}
 	}
 	public function addStep($repairStep) {
 		if (is_string($repairStep)) {
 			try {
-				$s = \OC::$server->query($repairStep);
+				$s = \OC::$server->get($repairStep);
 			} catch (QueryException $e) {
 				if (class_exists($repairStep)) {
 					try {
 	}
 
 	/**
-	 * @param array<string, mixed> $arguments
+	 * @param string $message
 	 */
-	public function emit(string $scope, string $method, array $arguments = []): void {
-		$this->dispatcher->dispatch("$scope::$method",
-				new GenericEvent("$scope::$method", $arguments));
-	}
-
-	public function info($string) {
+	public function info($message) {
 		// for now just emit as we did in the past
-		$this->emit('\OC\Repair', 'info', ['message' => $string]);
+		$this->dispatcher->dispatchTyped(new RepairInfoEvent($message));
 	}
 
 	/**
 	 */
 	public function warning($message) {
 		// for now just emit as we did in the past
-		$this->emit('\OC\Repair', 'warning', ['message' => $message]);
+		$this->dispatcher->dispatchTyped(new RepairWarningEvent($message));
 	}
 
 	/**
 	 */
 	public function startProgress($max = 0) {
 		// for now just emit as we did in the past
-		$this->emit('\OC\Repair', 'startProgress', ['max' => $max, 'step' => $this->currentStep]);
+		$this->dispatcher->dispatchTyped(new RepairStartEvent($max, $this->currentStep));
 	}
 
 	/**
 	 */
 	public function advance($step = 1, $description = '') {
 		// for now just emit as we did in the past
-		$this->emit('\OC\Repair', 'advance', ['step' => $step, 'desc' => $description]);
+		$this->dispatcher->dispatchTyped(new RepairAdvanceEvent($step, $description));
 	}
 
 	/**
 	 */
 	public function finishProgress() {
 		// for now just emit as we did in the past
-		$this->emit('\OC\Repair', 'finishProgress', []);
+		$this->dispatcher->dispatchTyped(new RepairFinishEvent());
 	}
 }

lib/private/Repair/Events/RepairAdvanceEvent.php

+<?php
+/**
+ * @copyright Copyright (c) 2022 Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @author Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OC\Repair\Events;
+
+use OCP\EventDispatcher\Event;
+
+class RepairAdvanceEvent extends Event {
+	// TODO Is that current step or step increment?
+	private int $current;
+	private string $description;
+
+	public function __construct(
+		int $current,
+		string $description
+	) {
+		$this->current = $current;
+		$this->description = $description;
+	}
+
+	public function getCurrentStep(): int {
+		return $this->current;
+	}
+
+	public function getDescription(): string {
+		return $this->description;
+	}
+}

lib/private/Repair/Events/RepairErrorEvent.php

+<?php
+/**
+ * @copyright Copyright (c) 2022 Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @author Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OC\Repair\Events;
+
+use OCP\EventDispatcher\Event;
+
+class RepairErrorEvent extends Event {
+	private string $message;
+
+	public function __construct(
+		string $message
+	) {
+		$this->message = $message;
+	}
+
+	public function getMessage(): string {
+		return $this->message;
+	}
+}

lib/private/Repair/Events/RepairFinishEvent.php

+<?php
+/**
+ * @copyright Copyright (c) 2022 Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @author Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OC\Repair\Events;
+
+use OCP\EventDispatcher\Event;
+
+class RepairFinishEvent extends Event {
+}

lib/private/Repair/Events/RepairInfoEvent.php

+<?php
+/**
+ * @copyright Copyright (c) 2022 Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @author Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OC\Repair\Events;
+
+use OCP\EventDispatcher\Event;
+
+class RepairInfoEvent extends Event {
+	private string $message;
+
+	public function __construct(
+		string $message
+	) {
+		$this->message = $message;
+	}
+
+	public function getMessage(): string {
+		return $this->message;
+	}
+}

lib/private/Repair/Events/RepairStartEvent.php

+<?php
+/**
+ * @copyright Copyright (c) 2022 Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @author Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OC\Repair\Events;
+
+use OCP\EventDispatcher\Event;
+
+class RepairStartEvent extends Event {
+	private int $max;
+	private string $current;
+
+	public function __construct(
+		int $max,
+		string $current
+	) {
+		$this->max = $max;
+		$this->current = $current;
+	}
+
+	public function getMaxStep(): int {
+		return $this->max;
+	}
+
+	public function getCurrentStepName(): string {
+		return $this->current;
+	}
+}

lib/private/Repair/Events/RepairStepEvent.php

+<?php
+/**
+ * @copyright Copyright (c) 2022 Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @author Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OC\Repair\Events;
+
+use OCP\EventDispatcher\Event;
+
+class RepairStepEvent extends Event {
+	private string $stepName;
+
+	public function __construct(
+		string $stepName
+	) {
+		$this->stepName = $stepName;
+	}
+
+	public function getStepName(): string {
+		return $this->stepName;
+	}
+}

lib/private/Repair/Events/RepairWarningEvent.php

+<?php
+/**
+ * @copyright Copyright (c) 2022 Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @author Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OC\Repair\Events;
+
+use OCP\EventDispatcher\Event;
+
+class RepairWarningEvent extends Event {
+	private string $message;
+
+	public function __construct(
+		string $message
+	) {
+		$this->message = $message;
+	}
+
+	public function getMessage(): string {
+		return $this->message;
+	}
+}

lib/private/Updater.php

  */
 namespace OC;
 
+use OCP\App\IAppManager;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventDispatcher;
+use OCP\HintException;
+use OCP\IConfig;
+use OCP\ILogger;
+use OCP\Util;
 use OC\App\AppManager;
 use OC\DB\Connection;
 use OC\DB\MigrationService;
+use OC\DB\MigratorExecuteSqlEvent;
 use OC\Hooks\BasicEmitter;
 use OC\IntegrityCheck\Checker;
+use OC\Repair\Events\RepairAdvanceEvent;
+use OC\Repair\Events\RepairErrorEvent;
+use OC\Repair\Events\RepairFinishEvent;
+use OC\Repair\Events\RepairInfoEvent;
+use OC\Repair\Events\RepairStartEvent;
+use OC\Repair\Events\RepairStepEvent;
+use OC\Repair\Events\RepairWarningEvent;
 use OC_App;
-use OCP\App\IAppManager;
-use OCP\HintException;
-use OCP\IConfig;
-use OCP\ILogger;
-use OCP\Util;
 use Psr\Log\LoggerInterface;
-use Symfony\Component\EventDispatcher\GenericEvent;
 
 /**
  * Class that handles autoupdating of ownCloud
 	 * @return bool true if the operation succeeded, false otherwise
 	 */
 	public function upgrade(): bool {
-		$this->emitRepairEvents();
 		$this->logAllEvents();
 
 		$logLevel = $this->config->getSystemValue('loglevel', ILogger::WARN);
 		file_put_contents($this->config->getSystemValue('datadirectory', \OC::$SERVERROOT . '/data') . '/.ocdata', '');
 
 		// pre-upgrade repairs
-		$repair = new Repair(Repair::getBeforeUpgradeRepairSteps(), \OC::$server->getEventDispatcher(), \OC::$server->get(LoggerInterface::class));
+		$repair = new Repair(Repair::getBeforeUpgradeRepairSteps(), \OC::$server->get(\OCP\EventDispatcher\IEventDispatcher::class), \OC::$server->get(LoggerInterface::class));
 		$repair->run();
 
 		$this->doCoreUpgrade();
 		}
 
 		// post-upgrade repairs
-		$repair = new Repair(Repair::getRepairSteps(), \OC::$server->getEventDispatcher(), \OC::$server->get(LoggerInterface::class));
+		$repair = new Repair(Repair::getRepairSteps(), \OC::$server->get(\OCP\EventDispatcher\IEventDispatcher::class), \OC::$server->get(LoggerInterface::class));
 		$repair->run();
 
 		//Invalidate update feed
 		}
 	}
 
-	/**
-	 * Forward messages emitted by the repair routine
-	 */
-	private function emitRepairEvents(): void {
-		$dispatcher = \OC::$server->getEventDispatcher();
-		$dispatcher->addListener('\OC\Repair::warning', function ($event) {
-			if ($event instanceof GenericEvent) {
-				$this->emit('\OC\Updater', 'repairWarning', $event->getArguments());
-			}
-		});
-		$dispatcher->addListener('\OC\Repair::error', function ($event) {
-			if ($event instanceof GenericEvent) {
-				$this->emit('\OC\Updater', 'repairError', $event->getArguments());
-			}
-		});
-		$dispatcher->addListener('\OC\Repair::info', function ($event) {
-			if ($event instanceof GenericEvent) {
-				$this->emit('\OC\Updater', 'repairInfo', $event->getArguments());
-			}
-		});
-		$dispatcher->addListener('\OC\Repair::step', function ($event) {
-			if ($event instanceof GenericEvent) {
-				$this->emit('\OC\Updater', 'repairStep', $event->getArguments());
-			}
-		});
-	}
-
 	private function logAllEvents(): void {
 		$log = $this->log;
 
-		$dispatcher = \OC::$server->getEventDispatcher();
-		/** @var IEventDispatcher $newDispatcher */
-		$newDispatcher = \OC::$server->get(IEventDispatcher::class);
-		$newDispatcher->addListener(
+		/** @var IEventDispatcher $dispatcher */
+		$dispatcher = \OC::$server->get(IEventDispatcher::class);
+		$dispatcher->addListener(
 			MigratorExecuteSqlEvent::class,
 			function (MigratorExecuteSqlEvent $event) use ($log) {
 				$log->info(get_class($event).': ' . $event->getSql() . ' (' . $event->getCurrentStep() . ' of ' . $event->getMaxStep() . ')', ['app' => 'updater']);
 			}
 		);
 
-		$repairListener = function ($event) use ($log) {
-			if (!$event instanceof GenericEvent) {
-				return;
-			}
-			switch ($event->getSubject()) {
-				case '\OC\Repair::startProgress':
-					$log->info('\OC\Repair::startProgress: Starting ... ' . $event->getArgument('max') .  ' (' . $event->getArgument('step') . ')', ['app' => 'updater']);
-					break;
-				case '\OC\Repair::advance':
-					$desc = $event->getArgument('desc');
-					if (empty($desc)) {
-						$desc = '';
-					}
-					$log->info('\OC\Repair::advance: ' . $desc . ' (' . $event->getArgument('step') . ')', ['app' => 'updater']);
-
-					break;
-				case '\OC\Repair::finishProgress':
-					$log->info('\OC\Repair::finishProgress', ['app' => 'updater']);
-					break;
-				case '\OC\Repair::step':
-					$log->info('\OC\Repair::step: Repair step: ' . $event->getArgument('step'), ['app' => 'updater']);
-					break;
-				case '\OC\Repair::info':
-					$log->info('\OC\Repair::info: Repair info: ' . $event->getArgument('message'), ['app' => 'updater']);
-					break;
-				case '\OC\Repair::warning':
-					$log->warning('\OC\Repair::warning: Repair warning: ' . $event->getArgument('message'), ['app' => 'updater']);
-					break;
-				case '\OC\Repair::error':
-					$log->error('\OC\Repair::error: Repair error: ' . $event->getArgument('message'), ['app' => 'updater']);
-					break;
+		$repairListener = function (Event $event) use ($log) {
+			if ($event instanceof RepairStartEvent) {
+				$log->info(get_class($event).': Starting ... ' . $event->getMaxStep() .  ' (' . $event->getCurrentStepName() . ')', ['app' => 'updater']);
+			} elseif ($event instanceof RepairAdvanceEvent) {
+				$desc = $event->getDescription();
+				if (empty($desc)) {
+					$desc = '';
+				}
+				$log->info(get_class($event).': ' . $desc . ' (' . $event->getCurrentStep() . ')', ['app' => 'updater']);
+			} elseif ($event instanceof RepairFinishEvent) {
+				$log->info(get_class($event), ['app' => 'updater']);
+			} elseif ($event instanceof RepairStepEvent) {
+				$log->info(get_class($event).': Repair step: ' . $event->getStepName(), ['app' => 'updater']);
+			} elseif ($event instanceof RepairInfoEvent) {
+				$log->info(get_class($event).': Repair info: ' . $event->getMessage(), ['app' => 'updater']);
+			} elseif ($event instanceof RepairWarningEvent) {
+				$log->warning(get_class($event).': Repair warning: ' . $event->getMessage(), ['app' => 'updater']);
+			} elseif ($event instanceof RepairErrorEvent) {
+				$log->error(get_class($event).': Repair error: ' . $event->getMessage(), ['app' => 'updater']);
 			}
 		};
 
-		$dispatcher->addListener('\OC\Repair::startProgress', $repairListener);
-		$dispatcher->addListener('\OC\Repair::advance', $repairListener);
-		$dispatcher->addListener('\OC\Repair::finishProgress', $repairListener);
-		$dispatcher->addListener('\OC\Repair::step', $repairListener);
-		$dispatcher->addListener('\OC\Repair::info', $repairListener);
-		$dispatcher->addListener('\OC\Repair::warning', $repairListener);
-		$dispatcher->addListener('\OC\Repair::error', $repairListener);
+		$dispatcher->addListener(RepairStartEvent::class, $repairListener);
+		$dispatcher->addListener(RepairAdvanceEvent::class, $repairListener);
+		$dispatcher->addListener(RepairFinishEvent::class, $repairListener);
+		$dispatcher->addListener(RepairStepEvent::class, $repairListener);
+		$dispatcher->addListener(RepairInfoEvent::class, $repairListener);
+		$dispatcher->addListener(RepairWarningEvent::class, $repairListener);
+		$dispatcher->addListener(RepairErrorEvent::class, $repairListener);
 
 
 		$this->listen('\OC\Updater', 'maintenanceEnabled', function () use ($log) {

lib/private/legacy/OC_App.php

  * along with this program. If not, see <http://www.gnu.org/licenses/>
  *
  */
+use OCP\AppFramework\QueryException;
+use OCP\App\ManagerEvent;
+use OCP\Authentication\IAlternativeLogin;
+use OCP\ILogger;
+use OCP\Settings\IManager as ISettingsManager;
+use OC\AppFramework\Bootstrap\Coordinator;
 use OC\App\DependencyAnalyzer;
 use OC\App\Platform;
-use OC\AppFramework\Bootstrap\Coordinator;
 use OC\DB\MigrationService;
 use OC\Installer;
 use OC\Repair;
+use OC\Repair\Events\RepairErrorEvent;
 use OC\ServerNotAvailableException;
-use OCP\App\ManagerEvent;
-use OCP\AppFramework\QueryException;
-use OCP\Authentication\IAlternativeLogin;
-use OCP\ILogger;
-use OCP\Settings\IManager as ISettingsManager;
 use Psr\Log\LoggerInterface;
 
 /**
 		// load the app
 		self::loadApp($appId);
 
-		$dispatcher = OC::$server->getEventDispatcher();
+		$dispatcher = \OC::$server->get(\OCP\EventDispatcher\IEventDispatcher::class);
 
 		// load the steps
 		$r = new Repair([], $dispatcher, \OC::$server->get(LoggerInterface::class));
 			try {
 				$r->addStep($step);
 			} catch (Exception $ex) {
-				$r->emit('\OC\Repair', 'error', ['message' => $ex->getMessage()]);
+				$dispatcher->dispatchTyped(new RepairErrorEvent($ex->getMessage()));
 				\OC::$server->getLogger()->logException($ex);
 			}
 		}

lib/public/Migration/IOutput.php

 
 	/**
 	 * @param string $message
+	 * @return void
 	 * @since 9.1.0
 	 */
 	public function info($message);
 
 	/**
 	 * @param string $message
+	 * @return void
 	 * @since 9.1.0
 	 */
 	public function warning($message);
 
 	/**
 	 * @param int $max
+	 * @return void
 	 * @since 9.1.0
 	 */
 	public function startProgress($max = 0);
 	/**
 	 * @param int $step
 	 * @param string $description
+	 * @return void
 	 * @since 9.1.0
 	 */
 	public function advance($step = 1, $description = '');
 
 	/**
-	 * @param int $max
+	 * @return void
 	 * @since 9.1.0
 	 */
 	public function finishProgress();