Method getItemProductDiscounts

public function getItemProductDiscounts($orderId, $onlyPublished = 0)
{
    $db = Factory::getDBO();
    $q = 'SELECT d.*' . ' FROM #__phocacart_orders AS o' . ' LEFT JOIN #__phocacart_order_product_discounts AS d ON o.id = d.order_id' . ' WHERE o.id = ' . (int) $orderId;
    if ($onlyPublished == 1) {
        $q .= ' AND d.published = 1';
    }
    $q .= ' ORDER BY d.id';
    $db->setQuery($q);
    $items = $db->loadObjectList();
    $itemsByKey = array();
    if (!empty($items)) {
        $oPD = array();
        $iS = 4;
        // specific ordering - start from 3 because 0 - 2 is taken for reward points, product discounts, cart discounts, coupon
        foreach ($items as $k => $v) {
            // SPECIFIC CASE - BACKWARD COMPATIBILITY
            // Ordering 5 (reward points) -> 2 (product discount) -> 3 (cart discount) -> 4 (coupon)
            if ($v->type == 5) {
                $kS = 0;
            } else {
                if ($v->type == 2) {
                    $kS = 1;
                } else {
                    if ($v->type == 3) {
                        $kS = 2;
                    } else {
                        if ($v->type == 4) {
                            $kS = 3;
                        } else {
                            $kS = $iS;
                        }
                    }
                }
            }
            $itemsByKey[$v->product_id_key][$kS] = $v;
            $iS++;
        }
        if (!empty($itemsByKey)) {
            foreach ($itemsByKey as $k => $v) {
                ksort($itemsByKey[$k]);
            }
        }
    }
    return $itemsByKey;
    //return $items;
}