public function generateArticleBarChartDataDoctrine($articles, $dates)
{
$articleStatRepo = $this->manager->getRepository('OjsAnalyticsBundle:ArticleStatistic');
$articleStats = $articleStatRepo->findByArticles($articles, $dates);
$articleViews = ['View'];
foreach ($dates as $date) {
$total = 0;
/** @var ArticleStatistic $stat */
$stat = $articleStats->first();
while ($stat && $stat->getDate()->format($this::DATE_FORMAT) == $date) {
$total += $stat->getView();
$articleStats->removeElement($stat);
$stat = $articleStats->first();
}
$articleViews[] = $total;
}
return $articleViews;
}