widget checkout data

 saveCheckout(Carts cart) async {
    showDialog(
        context: context,
        builder: (context) {
          return AlertDialog(
            title: Text('Processing'),
            content: Container(
              child: Column(
                mainAxisSize: MainAxisSize.min,
                children: <Widget>[
                  CircularProgressIndicator(
                    backgroundColor: Colors.amber,
                  ),
                  SizedBox(
                    height: 4,
                  ),
                  Text("Loading...")
                ],
              ),
            ),
          );
        });
    try {
      var url = Uri.parse("http://172.17.1.39/menu_foods_resto/api/add_checkout_foods.php");
      var request = http.MultipartRequest("POST", url);

      request.fields['nameCustomer'] = orderNameController.text;
      request.fields['tableNumber'] = tableController.text;

        // data yang di simpan dg insert multiple row adalah data yg dipilih dari data cart per id barang/makanan

        // data quantity yang di looping & di simpan dg insert multiple row di table_purchase
      for (CartModels cart in cart.cartItems) {
        var qty = cart.quantities;
        request.fields['quantity'] = qty.toString();
      print(qty);
      }

        // data id_foods yang dilooping & disimpan insert multiple row di table_purchase
      for (CartModels cart in cart.cartItems) {
        idFoods = cart.foods.id ;
        request.fields['idFoods'] = idFoods.toString();
        print(idFoods);
      }

    // data total harga, nama customer, & nomor meja disimpan langsung di table received_checkout_data tanpa menggunakan insert multiple row

    // data total harga yg disimpan di table received_checkout_data (tidak menggunakan insert multiple row)
      double total = 0;
      for (CartModels cart in cart.cartItems) {
        total += cart.foods.foodsPrice * cart.quantities;
      }
      request.fields['totalPrice'] = total.toStringAsFixed(2);
      print(total);

      var response = await request.send();
      response.stream.transform(utf8.decoder).listen((value) {
        print(value);
        final data = jsonDecode(value);
        int valueGet = data['value'];
        String message = data['message'];
        if (valueGet == 1) {
          Navigator.pop(context);
          print(message);
        } else {
          Navigator.pop(context);
          print(message);
        }
      });
    } catch (e) {
      debugPrint("Error $e");
    }
  }