/**
  * Retrieve all Objects stored in this storage, filtered by the given collection name
  *
  * @param callable $callback Function called after each iteration
  * @param CollectionInterface $collection
  * @return \Generator<Object>
  */
 public function getObjectsByCollection(CollectionInterface $collection, callable $callback = null)
 {
     $iterator = $this->resourceRepository->findByCollectionNameIterator($collection->getName());
     $iteration = 0;
     foreach ($this->resourceRepository->iterate($iterator, $callback) as $resource) {
         /** @var PersistentResource $resource */
         $object = new Object();
         $object->setFilename($resource->getFilename());
         $object->setSha1($resource->getSha1());
         $object->setMd5($resource->getMd5());
         $object->setFileSize($resource->getFileSize());
         $object->setStream(function () use($resource) {
             return $this->getStreamByResource($resource);
         });
         (yield $object);
         if (is_callable($callback)) {
             call_user_func($callback, $iteration, $object);
         }
         $iteration++;
     }
 }
 /**
  * Clean up resource registry
  *
  * This command checks the resource registry (that is the database tables) for orphaned resource objects which don't
  * seem to have any corresponding data anymore (for example: the file in Data/Persistent/Resources has been deleted
  * without removing the related Resource object).
  *
  * If the TYPO3.Media package is active, this command will also detect any assets referring to broken resources
  * and will remove the respective Asset object from the database when the broken resource is removed.
  *
  * This command will ask you interactively what to do before deleting anything.
  *
  * @return void
  */
 public function cleanCommand()
 {
     $this->outputLine('Checking if resource data exists for all known resource objects ...');
     $this->outputLine();
     $mediaPackagePresent = $this->packageManager->isPackageActive('TYPO3.Media');
     $resourcesCount = $this->resourceRepository->countAll();
     $this->output->progressStart($resourcesCount);
     $brokenResources = [];
     $relatedAssets = new \SplObjectStorage();
     $relatedThumbnails = new \SplObjectStorage();
     $iterator = $this->resourceRepository->findAllIterator();
     foreach ($this->resourceRepository->iterate($iterator, function ($iteration) {
         $this->clearState($iteration);
     }) as $resource) {
         $this->output->progressAdvance(1);
         /* @var Resource $resource */
         $stream = $resource->getStream();
         if (!is_resource($stream)) {
             $brokenResources[] = $resource->getSha1();
         }
     }
     $this->output->progressFinish();
     $this->outputLine();
     if ($mediaPackagePresent && count($brokenResources) > 0) {
         /* @var AssetRepository $assetRepository */
         $assetRepository = $this->objectManager->get(AssetRepository::class);
         /* @var ThumbnailRepository $thumbnailRepository */
         $thumbnailRepository = $this->objectManager->get(ThumbnailRepository::class);
         foreach ($brokenResources as $key => $resourceSha1) {
             $resource = $this->resourceRepository->findOneBySha1($resourceSha1);
             $brokenResources[$key] = $resource;
             $assets = $assetRepository->findByResource($resource);
             if ($assets !== null) {
                 $relatedAssets[$resource] = $assets;
             }
             $thumbnails = $thumbnailRepository->findByResource($resource);
             if ($assets !== null) {
                 $relatedThumbnails[$resource] = $thumbnails;
             }
         }
     }
     if (count($brokenResources) > 0) {
         $this->outputLine('<b>Found %s broken resource(s):</b>', [count($brokenResources)]);
         $this->outputLine();
         foreach ($brokenResources as $resource) {
             $this->outputLine('%s (%s) from "%s" collection', [$resource->getFilename(), $resource->getSha1(), $resource->getCollectionName()]);
             if (isset($relatedAssets[$resource])) {
                 foreach ($relatedAssets[$resource] as $asset) {
                     $this->outputLine(' -> %s (%s)', [get_class($asset), $asset->getIdentifier()]);
                 }
             }
         }
         $response = null;
         while (!in_array($response, ['y', 'n', 'c'])) {
             $response = $this->output->ask('<comment>Do you want to remove all broken resource objects and related assets from the database? (y/n/c) </comment>');
         }
         switch ($response) {
             case 'y':
                 $brokenAssetCounter = 0;
                 $brokenThumbnailCounter = 0;
                 foreach ($brokenResources as $sha1 => $resource) {
                     $this->outputLine('- delete %s (%s) from "%s" collection', [$resource->getFilename(), $resource->getSha1(), $resource->getCollectionName()]);
                     $resource->disableLifecycleEvents();
                     $this->resourceRepository->remove($resource);
                     if (isset($relatedAssets[$resource])) {
                         foreach ($relatedAssets[$resource] as $asset) {
                             $assetRepository->remove($asset);
                             $brokenAssetCounter++;
                         }
                     }
                     if (isset($relatedThumbnails[$resource])) {
                         foreach ($relatedThumbnails[$resource] as $thumbnail) {
                             $thumbnailRepository->remove($thumbnail);
                             $brokenThumbnailCounter++;
                         }
                     }
                     $this->persistenceManager->persistAll();
                 }
                 $brokenResourcesCounter = count($brokenResources);
                 if ($brokenResourcesCounter > 0) {
                     $this->outputLine('Removed %s resource object(s) from the database.', [$brokenResourcesCounter]);
                 }
                 if ($brokenAssetCounter > 0) {
                     $this->outputLine('Removed %s asset object(s) from the database.', [$brokenAssetCounter]);
                 }
                 if ($brokenThumbnailCounter > 0) {
                     $this->outputLine('Removed %s thumbnail object(s) from the database.', [$brokenThumbnailCounter]);
                 }
                 break;
             case 'n':
                 $this->outputLine('Did not delete any resource objects.');
                 break;
             case 'c':
                 $this->outputLine('Stopping. Did not delete any resource objects.');
                 $this->quit(0);
                 break;
         }
     }
 }