/**
* Gets user subscription expiration date
*
* @param UserSubscription $userSubscription User subscription
*
* @return DateTime
*/
public function getExpirationDate(UserSubscription $userSubscription)
{
$now = new \DateTime('now');
$createdAt = $userSubscription->getCreatedAt();
// diffrence in days between subscription create date
// and actual activation date
$daysDiffrence = (int) $now->diff($createdAt)->format("%a");
$startDate = $createdAt ?: $now;
$days = $userSubscription->getSubscription()->getRange();
$days = $days + $daysDiffrence;
$timeSpan = new \DateInterval('P' . $days . 'D');
return $startDate->add($timeSpan);
}
