/**
 * Formatting file sizes and file names for display.
 *
 * @module
 */

/** Returns `bytes` as a size in B, KB or MB. */
export function formatBytes(bytes: number): string {
  if (bytes < 1024) return `${bytes} B`;
  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)} KB`;
  return `${(bytes / (1024 * 1024)).toFixed(1)} MB`;
}

/**
 * Returns the file name `name` as a readable dump title: the extension goes (it
 * is noise in a feed, and the dump already carries its MIME type), and
 * underscore runs become spaces, so `holiday_photo-01.final.jpg` reads as
 * `holiday photo-01.final`. Names that are *only* an extension (`.gitignore`)
 * are left alone.
 */
export function titleFromFileName(name: string): string {
  const withoutExt = name.replace(/(?!^)\.[^.]+$/, "");
  return withoutExt.replace(/_+/g, " ").trim() || name;
}