Method transformDryRun

app/src/API/Handlers/ProjectHandler.cpp:6061–6136

* @brief Transform dry-run: compile + apply transform() to a list of values. */

 * @brief Transform dry-run: compile + apply transform() to a list of values.
 */
API::CommandResponse API::Handlers::ProjectHandler::transformDryRun(const QString& id,
                                                                    const QJsonObject& params)
{
  if (!params.contains(QStringLiteral("code")))
    return CommandResponse::makeError(
      id, ErrorCode::MissingParam, QStringLiteral("Missing required parameter: code"));

  if (!params.contains(QStringLiteral("language")))
    return CommandResponse::makeError(
      id, ErrorCode::MissingParam, QStringLiteral("Missing required parameter: language"));

  if (!params.contains(QStringLiteral("values")))
    return CommandResponse::makeError(
      id, ErrorCode::MissingParam, QStringLiteral("Missing required parameter: values"));

  const auto code     = params.value(QStringLiteral("code")).toString();
  const auto language = params.value(QStringLiteral("language")).toInt();
  const auto values   = params.value(QStringLiteral("values")).toArray();

  QString wrapped;
  if (language == 1) {
    wrapped = code
            + QStringLiteral("\n\nfunction parse(frame)\n"
                             "  local v = tonumber(frame)\n"
                             "  if v == nil then v = frame end\n"
                             "  local out = transform(v)\n"
                             "  return { tostring(out) }\n"
                             "end\n");
  } else {
    wrapped = code
            + QStringLiteral("\n\nfunction parse(frame) {\n"
                             "  var v = parseFloat(frame);\n"
                             "  if (isNaN(v)) v = frame;\n"
                             "  return [String(transform(v))];\n"
                             "}\n");
  }

  auto engine = makeScriptEngine(language);
  if (!engine->loadScript(wrapped, 0, false))
    return CommandResponse::makeError(
      id,
      ErrorCode::ExecutionError,
      QStringLiteral("Transform failed to compile or define transform(value)"));

  QJsonArray outputs;
  for (const auto& v : values) {
    QString sample;
    if (v.isDouble())
      sample = QString::number(SerialStudio::toDouble(v), 'g', 17);
    else
      sample = v.toString();

    const auto rows = engine->parseString(sample);
    if (rows.isEmpty() || rows.first().isEmpty()) {
      outputs.append(QJsonValue::Null);
      continue;
    }