public function rotate()
{
$asset = $this->getItem();
$length = $asset->length;
$chunkSize = $asset->chunkSize;
$chunks = ceil($length / $chunkSize);
$collChunkName = $asset->collectionNameGridFS() . ".chunks";
$collChunks = $asset->getDb()->{$collChunkName};
$binImagedata = null;
for ($i = 0; $i < $chunks; $i++) {
$chunk = $collChunks->findOne(array("files_id" => $asset->_id, "n" => $i));
$binImagedata .= $chunk["data"]->bin;
}
$dscImage = new \Dsc\Image(\imagecreatefromstring($binImagedata));
$dscImage->rotate($this->app->get('PARAMS.degrees'), null, false);
$buffer = $dscImage->toBuffer();
$asset->replace($buffer);
$this->app->reroute('/admin/asset/edit/' . $this->app->get('PARAMS.id'));
}
