public function getAllProducts($userid, $cartId, $categoryId)
 {
     $data = $this->db->getAvailableProductsInCategory($userid, $cartId, $categoryId);
     $categoryProducts = [];
     foreach ($data as $prod) {
         $product = new Product($prod);
         if ($product->getIsSold() == 0) {
             array_push($categoryProducts, $product);
         }
     }
     return $categoryProducts;
 }