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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 Preview |
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{ |
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/** |
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* Stream limit. |
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*/ |
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protected const SIZE_LIMIT = 2097152; |
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/** |
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* Logger. |
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* |
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* @var LoggerInterface |
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*/ |
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protected $logger; |
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/** |
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* Database. |
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* |
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* @var Database |
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*/ |
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protected $db; |
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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, Converter $converter, LoggerInterface $logger) |
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{ |
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$this->db = $db; |
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$this->converter = $converter; |
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$this->logger = $logger; |
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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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return $this->storePreview($file, $this->converter->createPreview($file)); |
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} |
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/** |
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* Set preview. |
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*/ |
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public function setPreview(File $file, $stream): ObjectId |
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{ |
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return $this->storePreview($file, $stream); |
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} |
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/** |
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* Get preview. |
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*/ |
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public function getPreview(File $file): string |
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{ |
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$preview = $file->getAppAttribute(__NAMESPACE__, 'preview'); |
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if ($preview instanceof ObjectId) { |
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try { |
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$stream = $this->db->selectGridFSBucket(['bucketName' => 'thumbnail']) |
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->openDownloadStream($preview); |
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$contents = stream_get_contents($stream); |
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fclose($stream); |
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return $contents; |
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} catch (\Exception $e) { |
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$this->logger->warning('failed download preview from gridfs 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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} |
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} |
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throw new Exception\PreviewNotFound('preview does not exists'); |
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} |
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/** |
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* Delete preview. |
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*/ |
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public function deletePreview(File $file): bool |
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{ |
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$bucket = $this->db->selectGridFSBucket(['bucketName' => 'thumbnail']); |
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$preview = $file->getAppAttribute(__NAMESPACE__, 'preview'); |
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if ($preview instanceof ObjectId) { |
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$references = $this->db->{'thumbnail.files'}->count([ |
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'apps' => [__NAMESPACE__ => ['preview' => $preview]], |
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]); |
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if (1 === $references) { |
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$this->logger->debug('delete preview ['.$preview.'] from file ['.$file->getId().']', [ |
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'category' => get_class($this), |
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]); |
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$bucket->delete($preview); |
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} else { |
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$this->logger->debug('do not remove preview blob ['.$preview.'] from file ['.$file->getId().'], there are still other references left', [ |
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'category' => get_class($this), |
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]); |
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} |
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$file->unsetAppAttribute(__NAMESPACE__, 'preview'); |
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return true; |
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} |
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return false; |
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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, $content): ObjectId |
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{ |
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$this->logger->info('store new 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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$preview = $file->getAppAttribute(__NAMESPACE__, 'preview'); |
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if ($preview instanceof ObjectId) { |
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$this->deletePreview($file); |
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} |
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} catch (\Exception $e) { |
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//ignore exception |
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} |
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try { |
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$result = stream_get_contents($content, self::SIZE_LIMIT); |
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$hash = md5($result); |
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rewind($content); |
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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 $found['_id']; |
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} |
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$id = new ObjectId(); |
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$bucket = $this->db->selectGridFSBucket(['bucketName' => 'thumbnail']); |
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$stream = $bucket->openUploadStream(null, ['_id' => $id]); |
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stream_copy_to_stream($content, $stream); |
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return $id; |
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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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gyselroth /
balloon
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This error could be the result of:
1. Missing dependencies
PHP Analyzer uses your
composer.jsonfile (if available) to determine the dependencies of your project and to determine all the available classes and functions. It expects thecomposer.jsonto be in the root folder of your repository.Are you sure this class is defined by one of your dependencies, or did you maybe not list a dependency in either the
requireorrequire-devsection?2. Missing use statement
PHP does not complain about undefined classes in
ìnstanceofchecks. For example, the following PHP code will work perfectly fine:If you have not tested against this specific condition, such errors might go unnoticed.