public function onArticleView(ViewArticleEvent $event)
{
$article = $event->getArticle();
$stat = $this->em->getRepository('OjsAnalyticsBundle:ArticleStatistic')->findOneBy(['date' => new \DateTime(), 'article' => $article]);
if (!$stat) {
$stat = new ArticleStatistic();
$stat->setDate(new \DateTime());
$stat->setArticle($article);
$stat->setView(1);
} else {
$stat->setView($stat->getView() + 1);
}
$article->increaseViewCount();
$this->em->persist($article);
$this->em->persist($stat);
$this->em->flush();
}