Method dispatch

app/src/DataModel/Scripting/ControlScriptWorker.cpp:64–95

* @brief Runs an apiCall on the GUI thread so handlers never touch GUI objects off-thread. * Fails fast once shutdown is requested: a call drained late in teardown must never * execute a command against modules that are already torn down. */

 *        execute a command against modules that are already torn down.
 */
QVariantMap DataModel::ControlApiMarshaller::dispatch(const QString& method,
                                                      const QVariantMap& params)
{
  static std::atomic<quint64> s_requestSeq{0};

  if (s_shutdownRequested.load(std::memory_order_acquire)) {
    QVariantMap out;
    out.insert(QStringLiteral("ok"), false);
    out.insert(QStringLiteral("error"), QStringLiteral("apiCall: application is shutting down"));
    return out;
  }

  API::CommandRequest request;
  request.id      = QStringLiteral("cs-%1").arg(s_requestSeq.fetch_add(1) + 1);
  request.command = method;
  request.params  = QJsonObject::fromVariantMap(params);

  const auto response = API::CommandHandler::instance().processCommand(request);

  QVariantMap out;
  out.insert(QStringLiteral("ok"), response.success);
  if (response.success) {
    if (!response.result.isEmpty())
      out.insert(QStringLiteral("result"), response.result.toVariantMap());
  } else {
    out.insert(QStringLiteral("error"), response.errorMessage);
    out.insert(QStringLiteral("errorCode"), response.errorCode);
    if (!response.errorData.isEmpty())
      out.insert(QStringLiteral("errorData"), response.errorData.toVariantMap());
  }
  return out;
}

/**
 * @brief GUI-thread entry that arms reply capture and writes to the device in one step.