itunes_mark_duplicated_tracks.rb

#!/usr/bin/env macruby
# encoding: utf-8

require 'ubygems'
require 'digest/md5'

framework 'cocoa'
framework 'ScriptingBridge'

# http://www.johnmyleswhite.com/notebook/2009/11/20/cleaning-up-an-itunes-library-with-macruby/comment-page-1/#comment-17798
load_bridge_support_file File.expand_path('~/local/ITunes.bridgesupport')

RATING_DUPLICATED = 21

itunes = SBApplication.applicationWithBundleIdentifier("com.apple.itunes")
lib = itunes.sources[0].libraryPlaylists[0]
hash = {}

lib.fileTracks.each_with_index do |track, i|
  next unless track.respond_to?(:location)
  next unless track.location
  next if     track.rating == RATING_DUPLICATED # already marked as duplicated

  path = track.location.path

  next unless path =~ /(wav|mp3|aiff?)$/i;

  key = Digest::MD5.hexdigest([track.name, track.duration.to_i].join('$$$'))

  puts 'check: %s' % [track.name, track.artist, key].join(' - ')

  if hash[key]
    puts 'duplicate: %s' % [track.name, track.artist].join(' - ')

    # keep rating
    if track.rating > 20
      hash[key].rating = track.rating
    end

    # mark as duplicated track
    track.rating = RATING_DUPLICATED
  else
    hash[key] = track
  end
end