Method duplicateCurrentDataset

app/src/DataModel/ProjectModel.cpp:4284–4310

* @brief Appends a copy of the currently selected dataset to its parent group. */

 * @brief Appends a copy of the currently selected dataset to its parent group.
 */
void DataModel::ProjectModel::duplicateCurrentDataset()
{
  auto dataset = m_selectedDataset;

  if (dataset.groupId < 0 || static_cast<size_t>(dataset.groupId) >= m_groups.size())
    return;

  dataset.index     = nextDatasetIndex();
  dataset.datasetId = m_groups[dataset.groupId].datasets.size();
  dataset.uniqueId  = allocateUniqueId();

  const auto& siblings = m_groups[dataset.groupId].datasets;
  QStringList existingTitles;
  existingTitles.reserve(static_cast<int>(siblings.size()));
  for (const auto& d : siblings)
    existingTitles.append(d.title);

  dataset.title = nextDuplicateTitle(m_selectedDataset.title, existingTitles);

  m_groups[dataset.groupId].datasets.push_back(dataset);
  m_selectedDataset = dataset;

  Q_EMIT groupsChanged();
  Q_EMIT datasetAdded(dataset.groupId,
                      static_cast<int>(m_groups[dataset.groupId].datasets.size()) - 1);
  setModified(true);
}

/**
 * @brief Ensures a compatible group is selected before adding a dataset; honors sourceId scoping.