export function getEditHandlesForGeometry()

in modules/edit-modes/src/utils.ts [364:435]

• 61 lines of code
• 11 McCabe index (conditional complexity)

export function getEditHandlesForGeometry(
  geometry: Geometry,
  featureIndex: number,
  editHandleType: EditHandleType = 'existing'
): EditHandleFeature[] {
  let handles: EditHandleFeature[] = [];

  switch (geometry.type) {
    case 'Point':
      // positions are not nested
      handles = [
        {
          type: 'Feature',
          properties: {
            guideType: 'editHandle',
            editHandleType,
            positionIndexes: [],
            featureIndex,
          },
          geometry: {
            type: 'Point',
            coordinates: geometry.coordinates,
          },
        },
      ];
      break;
    case 'MultiPoint':
    case 'LineString':
      // positions are nested 1 level
      handles = handles.concat(
        getEditHandlesForCoordinates(geometry.coordinates, [], featureIndex, editHandleType)
      );
      break;
    case 'Polygon':
    case 'MultiLineString':
      // positions are nested 2 levels
      for (let a = 0; a < geometry.coordinates.length; a++) {
        handles = handles.concat(
          getEditHandlesForCoordinates(geometry.coordinates[a], [a], featureIndex, editHandleType)
        );
        if (geometry.type === 'Polygon') {
          // Don't repeat the first/last handle for Polygons
          handles = handles.slice(0, -1);
        }
      }

      break;
    case 'MultiPolygon':
      // positions are nested 3 levels
      for (let a = 0; a < geometry.coordinates.length; a++) {
        for (let b = 0; b < geometry.coordinates[a].length; b++) {
          handles = handles.concat(
            getEditHandlesForCoordinates(
              geometry.coordinates[a][b],
              [a, b],
              featureIndex,
              editHandleType
            )
          );
          // Don't repeat the first/last handle for Polygons
          handles = handles.slice(0, -1);
        }
      }

      break;
    default:
      // @ts-expect-error
      throw Error(`Unhandled geometry type: ${geometry.type}`);
  }

  return handles;
}