/**
  * @param \Bjr\BjrLend\Domain\Model\Article $article
  * @return array
  */
 private function findReservedDates(\Bjr\BjrLend\Domain\Model\Article $article)
 {
     $reservations = $this->reservationRepository->findByArticle($article);
     $reservedDates = array();
     /* @var $reservation \Bjr\BjrLend\Domain\Model\Reservation */
     foreach ($reservations as $reservation) {
         $list = $reservation->listIssueDays();
         foreach ($list as $dateTime) {
             $month = date('n', $dateTime);
             $day = date('j', $dateTime);
             $year = date('Y', $dateTime);
             $reservedDates[] = array('month' => $month, 'day' => $day, 'year' => $year);
         }
     }
     return array($reservations, $reservedDates);
 }