function immutablyAddPosition()

in modules/edit-modes/src/lib/immutable-feature-collection.ts [314:346]

• 31 lines of code
• 4 McCabe index (conditional complexity)

function immutablyAddPosition(
  coordinates: any,
  positionIndexes: number[] | null | undefined,
  positionToAdd: Position,
  isPolygonal: boolean
): any {
  if (!positionIndexes) {
    return coordinates;
  }
  if (positionIndexes.length === 0) {
    throw Error('Must specify the index of the position to remove');
  }
  if (positionIndexes.length === 1) {
    const updated = [
      ...coordinates.slice(0, positionIndexes[0]),
      positionToAdd,
      ...coordinates.slice(positionIndexes[0]),
    ];
    return updated;
  }

  // recursively update inner array
  return [
    ...coordinates.slice(0, positionIndexes[0]),
    immutablyAddPosition(
      coordinates[positionIndexes[0]],
      positionIndexes.slice(1, positionIndexes.length),
      positionToAdd,
      isPolygonal
    ),
    ...coordinates.slice(positionIndexes[0] + 1),
  ];
}