private function calculateDiscounts()
{
$freeCDDiscount = 0.0;
$preorderDiscount = 0.0;
//$unit_price_list = array();
$unit_price_list = Config::get('workshop.unit_price_list');
$itemCount = OrdersController::getCountOfItems(TRUE, TRUE);
// Exclude count of disks from sets and only CDs from current workshop year.
if (strtotime(date('Y-m-d')) <= strtotime(Config::get('workshop.last_free_cd_discount_date'))) {
$numberFreeCDs = (int) floor($itemCount['CD']['count'] / (double) Config::get('workshop.free_cd_count'));
$freeCDDiscount = (double) $unit_price_list['CD'] * $numberFreeCDs;
}
// Pre-order discount applies ***ONLY*** to CDs/DVDs from current year's workshop!
if (strtotime(date('Y-m-d')) <= strtotime(Config::get('workshop.last_preorder_discount_date'))) {
$preorderDiscount = (double) Config::get('workshop.preorder_discount') * ($itemCount['CD']['sub_total_amt'] - $freeCDDiscount + $itemCount['DVD']['sub_total_amt'] + $itemCount['MP3']['sub_total_amt'] + $itemCount['SET']['sub_total_amt']);
}
return $freeCDDiscount + $preorderDiscount;
}
