public function updateTimes(Show $show)
{
$min = null;
$max = null;
foreach ($show->getPerformances() as $performance) {
if (is_null($min) || $performance->getStartDate() < $min) {
$min = $performance->getStartDate();
}
if (is_null($max) || $performance->getEndDate() > $max) {
$max = $performance->getEndDate();
}
}
$show->setStartAt($min);
$show->setEndAt($max);
}
