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<?php |
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declare(strict_types=1); |
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/** |
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* balloon |
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* |
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* @copyright Copryright (c) 2012-2019 gyselroth GmbH (https://gyselroth.com) |
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* @license GPL-3.0 https://opensource.org/licenses/GPL-3.0 |
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*/ |
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namespace Balloon\App\Preview; |
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use Balloon\Converter; |
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use Balloon\Filesystem\Node\File; |
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use MongoDB\BSON\ObjectId; |
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use MongoDB\Database; |
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use Psr\Log\LoggerInterface; |
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class PreviewCreator extends Preview |
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{ |
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/** |
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* Converter. |
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* |
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* @var Converter |
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*/ |
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protected $converter; |
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/** |
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* Constructor. |
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*/ |
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public function __construct(Database $db, LoggerInterface $logger, Converter $converter) |
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{ |
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parent::__construct($db, $logger); |
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$this->converter = $converter; |
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} |
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/** |
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* Create preview. |
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*/ |
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public function createPreview(File $file): ObjectId |
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{ |
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$this->logger->debug('create preview for file ['.$file->getId().']', [ |
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'category' => get_class($this), |
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]); |
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try { |
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$stream = $this->converter->createPreview($file); |
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$result = stream_get_contents($stream); |
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$hash = md5($result); |
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rewind($stream); |
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$found = $this->db->{'thumbnail.files'}->findOne([ |
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'md5' => $hash, |
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], ['_id', 'thumbnail']); |
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if ($found) { |
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$this->logger->debug('found existing preview ['.$found['_id'].'] with same hash, use stored preview', [ |
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'category' => get_class($this), |
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]); |
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$file->setAppAttribute(__NAMESPACE__, 'preview', $found['_id']); |
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return $found['_id']; |
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} |
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return $this->storePreview($file, $stream); |
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} catch (\Exception $e) { |
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$file->unsetAppAttribute(__NAMESPACE__, 'preview'); |
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throw $e; |
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} |
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} |
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/** |
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* Store new preview. |
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*/ |
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protected function storePreview(File $file, $content): ObjectId |
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{ |
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try { |
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$id = new ObjectId(); |
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$bucket = $this->db->selectGridFSBucket(['bucketName' => 'thumbnail']); |
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$stream = $bucket->openUploadStream(null, ['_id' => $id]); |
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/*fwrite($stream, $content); |
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fclose($stream);*/ |
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stream_copy_to_stream($content, $stream); |
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$file->setAppAttribute(__NAMESPACE__, 'preview', $id); |
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$this->logger->info('stored new preview ['.$id.'] for file ['.$file->getId().']', [ |
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'category' => get_class($this), |
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]); |
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return $id; |
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} catch (\Exception $e) { |
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$this->logger->error('failed store preview for file ['.$file->getId().']', [ |
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'category' => get_class($this), |
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'exception' => $e, |
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]); |
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throw $e; |
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} |
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} |
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} |
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gyselroth /
balloon
