dashpresshq/dashpress

function arrayMoveMutable<T>(array: T[], fromIndex: number, toIndex: number) {
  const startIndex = fromIndex < 0 ? array.length + fromIndex : fromIndex;

  if (startIndex >= 0 && startIndex < array.length) {
    const endIndex = toIndex < 0 ? array.length + toIndex : toIndex;

    const [item] = array.splice(fromIndex, 1);
    array.splice(endIndex, 0, item);
  }
}

export function arrayMoveImmutable<T>(
  array: T[],
  fromIndex: number,
  toIndex: number
) {
  const newArray = [...array];
  arrayMoveMutable(newArray, fromIndex, toIndex);
  return newArray;
}