/**
* If userID is set, then return valid user coupons count, else unused valid coupons count
* @param $userID
* @return $count
*/
public function getValidCouponsCount($userID = null) {
$select = $this->createCouponsSelect($userID);
$select->select->addAll(Pap_Db_Table_Coupons::getInstance());
$coupon = new Pap_Db_Coupon();
$coupons = $coupon->loadCollectionFromRecordset($select->getAllRows());
$validCouponsCount = 0;
foreach ($coupons as $coupon) {
if($coupon->isValid()) {
$validCouponsCount++;
}
}
return $validCouponsCount;
}