/**
* Returns filename for a cached thumbnail, calculated
* by its properties and dimensions.
*
* @param sfFilebasePluginFile $file
* @param array $thumbnail_properties
* @return sfFilebasePluginImage $filename
*/
public function getThumbnailFileinfo(sfFilebasePluginImage $file, $dimensions, $mime)
{
$thumbnail_properties = $this->getScaledImageData($file, $dimensions);
// Wrap in sfFilebasePluginImage because isImage may return false if file does not exist.
return new sfFilebasePluginThumbnail($this->filebase->getFilebaseFile($this->filebase->getCacheDirectory() . DIRECTORY_SEPARATOR . $this->filebase->getHashForFile($file) . '_' . $thumbnail_properties['new_width'] . '_' . $thumbnail_properties['new_height'] . '.' . (sfFilebasePluginUtil::getExtensionByMime($mime) === null ? $thumbnail_properties['extension'] : sfFilebasePluginUtil::getExtensionByMime($mime))), $this->filebase, $file);
}