Function MigrateWayOrRelatonFeatureIndex

libs/editor/edits_migration.cpp:47–100

}

FeatureID MigrateWayOrRelatonFeatureIndex(
    osm::Editor::ForEachFeaturesNearByFn & forEach, XMLFeature const & xml,
    FeatureStatus const /* Unused for now (we don't create/delete area features)*/,
    GenerateIDFn const & /*Unused for the same reason*/)
{
  std::optional<FeatureID> fid;
  auto bestScore = 0.6;  // initial score is used as a threshold.
  auto geometry = xml.GetGeometry();
  auto count = 0;

  if (geometry.empty())
    MYTHROW(MigrationError, ("Feature has invalid geometry", xml));

  // This can be any point on a feature.
  auto const someFeaturePoint = geometry[0];

  forEach([&fid, &geometry, &count, &bestScore](FeatureType & ft)
  {
    if (ft.GetGeomType() != feature::GeomType::Area)
      return;
    ++count;

    std::vector<m2::PointD> ftGeometry;
    assign_range(ftGeometry, ft.GetTrianglesAsPoints(FeatureType::BEST_GEOMETRY));

    double score = 0.0;
    try
    {
      score = matcher::ScoreTriangulatedGeometries(geometry, ftGeometry);
    }
    catch (geometry::NotAPolygonException & ex)
    {
      LOG(LWARNING, (ex.Msg()));
      // Support migration for old application versions.
      // TODO(a): To remove it when version 8.0.x will no longer be supported.
      base::SortUnique(geometry);
      base::SortUnique(ftGeometry);
      score = matcher::ScoreTriangulatedGeometriesByPoints(geometry, ftGeometry);
    }

    if (score > bestScore)
    {
      bestScore = score;
      fid = ft.GetID();
    }
  }, someFeaturePoint);

  if (count == 0)
    MYTHROW(MigrationError, ("No ways returned for point", someFeaturePoint));

  if (!fid)
    MYTHROW(MigrationError, ("None of returned ways suffice. Possibly, the feature has been deleted."));
  return *fid;
}

FeatureID MigrateFeatureIndex(osm::Editor::ForEachFeaturesNearByFn & forEach, XMLFeature const & xml,
                              FeatureStatus const featureStatus, GenerateIDFn const & generateID)