import 'dart:math';

double _log10(num x) => log(x) / ln10;

extension FileFormatter on num {
  String readableFileSize({bool base1024 = true}) {
    if (this <= 0) return "0";
    final base = base1024 ? 1024 : 1000;
    final units = base1024
        ? ["Bi", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB"]
        : ["B", "KB", "MB", "GB", "TB", "PB", "EB"];
    final digitGroups = (_log10(this) / _log10(base)).floor();
    return "${(this / pow(base, digitGroups)).toStringAsFixed(2)} ${units[digitGroups]}";
  }
}