public function list_product_to_json_data($data)
{
//new a new receipt
//basically, a Reiceipt is a list of product...
$receipt = new Receipt();
foreach ($data as $value) {
//new Product
$product = new Product();
// add attribute to it
$product->add_attribute($value['Name'], new Unit($value['UnitName'], $value['Price']), $value['Id'], $value['ProductId']);
//add the product to the receipt
$receipt->add($product);
}
// return the receipt in json format
return $receipt->json_encode();
}
