postPayment method

Implementation

Future<String?> postPayment(BuildContext context) async {
  if (selectedPaymentTypeGroupIndex.value == 999) {
    showSnackbar(
      title: "Informasi",
      body: "Silakan Pilih Pembayaran.",
    );
    return null;
  } else if (tfIdBillingController.text == "") {
    showSnackbar(
      title: "Informasi",
      body:
          "Silakan Masukkan ${listPaymentTypeGroup[selectedPaymentTypeGroupIndex.value].label}",
    );
    return null;
  }
  PaymentTypeGroup data =
      listPaymentTypeGroup[selectedPaymentTypeGroupIndex.value];
  var total = 0;
  if (data.isManualInput == "1" || data.isManualInput == "2") {
    if (tfTotalController.text == "") {
      showSnackbar(
        title: "Informasi",
        body: "Silakan Masukkan Nominal.",
      );
      return null;
    } else {
      var totalText = "";
      var splits = tfTotalController.text.split('.');
      for (var split in splits) {
        totalText = "$totalText$split";
      }
      total = int.parse(totalText);
    }
  }
  if (selectedPaymentMethodIndex.value == 999) {
    showSnackbar(
      title: "Informasi",
      body: "Silakan Pilih Metode Pembayaran.",
    );
    return null;
  }

  loadingPayment.value = true;
  // await service.cancelRequest();
  var result = await service.payment({
    "id_billing": tfIdBillingController.text,
    "payment_type": data.code,
    "payment_method":
        data.bankCategory?[selectedPaymentMethodIndex.value].methodId,
    "trx_amount": total,
    "payment_category":
        data.bankCategory?[selectedPaymentMethodIndex.value].code,
    "platform_type": "MOBILE",
    'partner_id': await Preferences().getUdid(),
  });
  loadingPayment.value = false;
  if (result.code == 200) {
    // Get.to(() => VirtualAccountScreen(clientRefnum: result.data?.clientRefnum ?? ''), arguments:result.data?.clientRefnum );
    // Get.toNamed(
    //   Strings.virtualAccountRoute,
    //   arguments: result.data?.clientRefnum,
    // );
    return result.data?.clientRefnum;
  } else if ((result.code ?? 0) >= 400 && (result.code ?? 0) < 500) {
    sheetError(
      context: Get.context!,
      typeError: 400,
      msg: result.message,
    );
  } else {
    sheetError(
      context: Get.context!,
      typeError: 500,
      msg: result.message,
    );
  }
  return null;
}