Method evaluateTransmitFunction

app/src/UI/Widgets/Output/Base.cpp:158–189

* @brief Runs the JavaScript transmit(value) function and returns the result as a QByteArray. */

 * @brief Runs the JavaScript transmit(value) function and returns the result as a QByteArray.
 */
QByteArray Widgets::Output::Base::evaluateTransmitFunction(const QVariant& value)
{
  if (!m_hasFn)
    return {};

  auto jsValue      = m_jsEngine.toScriptValue(value);
  QJSValueList args = QJSValueList{jsValue};
  auto result       = m_watchdog.call(m_transmitFn, args);

  if (m_watchdog.lastCallTimedOut()) [[unlikely]] {
    Q_EMIT transmitError(tr("Transmit script timed out after %1 ms").arg(kTransmitWatchdogMs));
    return {};
  }

  if (result.isError()) [[unlikely]] {
    Q_EMIT transmitError(result.toString());
    return {};
  }

  QByteArray data;
  if (result.isString())
    data = SerialStudio::encodeText(result.toString(), m_txEncoding);
  else
    data = result.toVariant().toByteArray();

  if (data.size() > kMaxPayloadBytes) [[unlikely]] {
    Q_EMIT transmitError(tr("Payload exceeds maximum size"));
    return {};
  }

  return data;
}

//--------------------------------------------------------------------------------------------------
// Protocol helper injection