public function addProduct($product_class_id, $quantity)
{
$objProduct = new SC_Product_Ex();
$arrProduct = $objProduct->getProductsClass($product_class_id);
$productTypeId = $arrProduct['product_type_id'];
$find = false;
$max = $this->getMax($productTypeId);
for ($i = 0; $i <= $max; $i++) {
if ($this->cartSession[$productTypeId][$i]['id'] == $product_class_id) {
$val = $this->cartSession[$productTypeId][$i]['quantity'] + $quantity;
if (strlen($val) <= INT_LEN) {
$this->cartSession[$productTypeId][$i]['quantity'] += $quantity;
}
$find = true;
}
}
if (!$find) {
$this->cartSession[$productTypeId][$max + 1]['id'] = $product_class_id;
$this->cartSession[$productTypeId][$max + 1]['quantity'] = $quantity;
$this->cartSession[$productTypeId][$max + 1]['cart_no'] = $this->getNextCartID($productTypeId);
}
}
