Method datasetAddMany

app/src/API/Handlers/ProjectHandler.cpp:1962–2057

* @brief Bulk-creates N datasets in one call with optional title/index patterns. */

 * @brief Bulk-creates N datasets in one call with optional title/index patterns.
 */
API::CommandResponse API::Handlers::ProjectHandler::datasetAddMany(const QString& id,
                                                                   const QJsonObject& params)
{
  constexpr int kMaxAddManyCount = 1024;

  for (const auto& key :
       {QStringLiteral("groupId"), QStringLiteral("count"), QStringLiteral("options")}) {
    if (!params.contains(key))
      return CommandResponse::makeError(
        id, ErrorCode::MissingParam, QStringLiteral("Missing required parameter: %1").arg(key));
  }

  const int groupId = params.value(QStringLiteral("groupId")).toInt();
  const int count   = params.value(QStringLiteral("count")).toInt();
  const int options = params.value(QStringLiteral("options")).toInt();

  if (count <= 0 || count > kMaxAddManyCount)
    return CommandResponse::makeError(
      id,
      ErrorCode::InvalidParam,
      QStringLiteral("Invalid count: must be 1..%1 (got %2)")
        .arg(QString::number(kMaxAddManyCount), QString::number(count)));

  if (options < 0 || options > 0b111111111)
    return CommandResponse::makeError(
      id, ErrorCode::InvalidParam, QStringLiteral("Invalid options: must be 0-511 (bit flags)"));

  auto& project      = DataModel::ProjectModel::instance();
  const auto& groups = project.groups();
  if (groupId < 0 || static_cast<size_t>(groupId) >= groups.size())
    return CommandResponse::makeError(
      id, ErrorCode::InvalidParam, QStringLiteral("Group id not found: %1").arg(groupId));

  const QString titlePattern = params.value(QStringLiteral("titlePattern")).toString();
  const int startNumber      = params.contains(QStringLiteral("startNumber"))
                               ? params.value(QStringLiteral("startNumber")).toInt()
                               : 1;
  const int startIndex       = params.contains(QStringLiteral("startIndex"))
                               ? params.value(QStringLiteral("startIndex")).toInt()
                               : -1;

  if (startIndex < -1)
    return CommandResponse::makeError(
      id,
      ErrorCode::InvalidParam,
      QStringLiteral("Invalid startIndex: must be -1 (auto), 0, or 1+"));

  const auto headline     = pickHeadlineDatasetOption(options);
  const int remainingBits = options & ~static_cast<int>(headline);

  project.setAutoSaveSuspended(true);
  project.setSelectedGroup(groups[groupId]);

  QJsonArray created;
  for (int i = 0; i < count; ++i) {
    project.addDataset(headline);

    const auto& post   = project.groups();