Method write

app/src/DataModel/Scripting/DeviceWriteApi.cpp:141–184

* @brief Implements deviceWrite(data, sourceId?) for the JS scripting engine. */

 * @brief Implements deviceWrite(data, sourceId?) for the JS scripting engine.
 */
QVariantMap DataModel::DeviceWriteBridge::write(const QJSValue& data, const QJSValue& sourceIdVal)
{
  auto makeError = [](const QString& msg) -> QVariantMap {
    QVariantMap m;
    m.insert(QStringLiteral("ok"), false);
    m.insert(QStringLiteral("error"), msg);
    return m;
  };

  int sourceId = defaultSourceId;
  if (!sourceIdVal.isUndefined() && !sourceIdVal.isNull()) {
    if (!sourceIdVal.isNumber())
      return makeError(QStringLiteral("deviceWrite: sourceId must be a number"));

    sourceId = static_cast<int>(sourceIdVal.toInt());
  }

  QByteArray bytes;
  if (data.isString()) {
    bytes = data.toString().toUtf8();
  } else if (data.isArray()) {
    const int len = data.property(QStringLiteral("length")).toInt();
    bytes.reserve(len);
    for (int i = 0; i < len; ++i)
      bytes.append(static_cast<char>(data.property(static_cast<quint32>(i)).toInt() & 0xff));
  } else {
    return makeError(QStringLiteral("deviceWrite: data must be a string or byte array"));
  }

  if (bytes.isEmpty())
    return makeError(QStringLiteral("deviceWrite: data is empty"));

  QString errorMsg;
  const qint64 written = performDeviceWrite(sourceId, bytes, errorMsg);

  QVariantMap result;
  if (written > 0 && errorMsg.isEmpty()) {
    result.insert(QStringLiteral("ok"), true);
  } else {
    result.insert(QStringLiteral("ok"), false);
    result.insert(QStringLiteral("error"), errorMsg);
  }
  return result;
}

//--------------------------------------------------------------------------------------------------
// Public installation entry points