takes all your "artist - album" folders, and makes them "artist/album" instead

cleanup_album_folders.rb

require 'fileutils'

require 'rubygems'
require 'titleize'

def is_artist_folder?(path)
  Dir.glob(File.join(path, "*")).any? { |contained_file| File.directory?(contained_file) }
end

def get_artist_name(path)
  raw_artist = path.split('-')[0]
  if raw_artist
    raw_artist.strip.titleize
  end
end

def get_album_name(path)
  folder_components = path.split('-')
  if folder_components[1]
    folder_components[1..folder_components.size].join('-').strip
  end
end

def ensure_artist_folder_exists(artist_name)
  unless File.exist?(artist_name)
    FileUtils.mkdir(artist_name)
  end
end

def overwrite_artist_and_album(artist, album_name)
  puts "ARTIST? (leave blank to remain the same)"
  input_artist = gets.strip
  artist = input_artist == "" ? artist : input_artist
  puts "ALBUM? (leave blank to remain the same)"
  input_album = gets.strip
  album_name = input_album == "" ? album_name : input_album

  return artist, album_name
end

def process_album(artist, album_name, original_path)
  puts "About to move to #{artist}/#{album_name} (n to skip, e to edit, anything else to proceed)"
  user_action = gets.strip.downcase
  case user_action
    when "e"
      artist, album_name = overwrite_artist_and_album(artist, album)
    when "n"
      puts "skipping"
      return
  end

  ensure_artist_folder_exists(artist)
  FileUtils.mv(original_path, File.join(artist, album_name), :verbose => true)
end

# Main loop from here

Dir.glob("*").reject do |folder|

  is_artist_folder?(folder)

end.map do |folder|
  
  artist = get_artist_name(folder)
  album_name = get_album_name(folder)

  if artist && album_name
    process_album(artist, album_name, folder)
  end

end