/**
* Removes the associated file from the persistent storage.
*
* @param LifecycleEventArgs $args
*
* @throws FileDeleteFailedException
*/
public function preRemove(LifecycleEventArgs $args)
{
$entity = $args->getEntity();
if ($entity instanceof File) {
try {
$fileStorage = $this->configuration->createFileStorage($args->getEntityManager());
/*
* @important be error tolerant even if physical file cannot be removed for whatever reason
*
* Returns false if file cannot be deleted but does not specify any reason. Unless an exception
* is thrown, remove operation is assumed OK.
*/
$fileStorage->remove($entity);
} catch (\Exception $e) {
throw new FileDeleteFailedException(sprintf('Cannot delete file \'%s\' with key %s. %s', $entity->getOrigFilename(), $entity->getKey(), $e));
}
}
}
/**
* @param Request $request
* @param string $key file key
*
* @return $this
*/
public function handle(Request $request, $key)
{
// get request param download if specified
$forceDownload = $request->get('download');
$this->forceDownload = $forceDownload === 1 || $forceDownload === 'true' ?: false;
// unless otherwise set, this handler will trigger a 404 file not found exception
$this->setResponseCode(404);
$this->responseMessage[] = sprintf('The requested resource \'%s\' was not found on this server.', $this->filename);
// try to find the requested File entity
$this->file = $file = $this->entityManager->getRepository('ReskumeFileBundle:File')->findOneBy(array('key' => $key));
if ($file instanceof File) {
$fileStorage = $this->configuration->createFileStorage($this->entityManager);
if ($this->fileContent = $fileStorage->getContent($file)) {
$this->setResponseCode(200);
$this->responseMessage = array();
}
}
return $this;
}
/**
* Creates a thumbnail with a fixed width. Height is calculated accordingly. Returns the a File
* entity that represents the calculated thumbnail. False if not.
*
* @param string $pathname path to the source file
* @param integer $desiredWidth the desired width of the output thumbnail. Height will be adjusted accordingly.
*
* @throws \RuntimeException
* @throws \InvalidArgumentException
* @throws FileNotFoundException
*
* @return HttpFile
*/
public function createScaledThumb(string $pathname, int $desiredWidth)
{
if (!is_string($pathname)) {
throw new \InvalidArgumentException(sprintf('Pathname parameter must be of type string!'));
}
$fileStorage = $this->configuration->createFileStorage($this->entityManager);
if (is_file($pathname)) {
// local file handling
$srcFile = new HttpFile($pathname);
$srcFileContent = file_get_contents($srcFile->getPathname());
} elseif ($srcFile = $fileStorage->getFile($pathname)) {
// backend file storage handling
$srcFileContent = $fileStorage->getContent($srcFile);
} else {
throw new FileNotFoundException(sprintf('Cannot create thumbnail for \'%s\'. File not found.', $pathname));
}
// do not process unsupported formats
if (!$this->isSupportedImageFormat($srcFile->getMimeType())) {
return false;
}
// before creating a thumbnail, try to find an already existing thumbnail for the requested file
return ($thumbnail = $this->findThumbnail($srcFile->getBasename())) ? $thumbnail : $this->createThumbnail($srcFileContent, $srcFile->getBasename(), $desiredWidth);
}
