public function getTotalDownloads($articleFile, $dates)
{
$builder = $this->createQueryBuilder('stat');
$builder->join('OjsJournalBundle:ArticleFile', 'file', 'WHERE', 'stat.articleFile = file')->addSelect('SUM(stat.download)')->andWhere('stat.date IN (:dates)')->andWhere('file = :file')->groupBy('stat.id, file')->setParameters(['file' => $articleFile, 'dates' => $dates]);
return $builder->getQuery()->getResult();
}