public function generateArticleFileDownloadsDataDoctrine($articles, $dates = null)
{
$articleFileStatRepo = $this->manager->getRepository('OjsAnalyticsBundle:ArticleFileStatistic');
$articleFileStats = $articleFileStatRepo->getMostDownloadedFiles($articles, $dates, 10);
$result = [];
foreach ($articleFileStats as $stat) {
/** @var ArticleFileStatistic $articleFileStat */
$articleFileStat = $stat[0];
$totalDownloads = $stat[1];
$result[] = array($articleFileStat->getArticleFile()->getTitle(), $totalDownloads);
}
return $result;
}