vogo-rename.rb

#!/usr/bin/env ruby
#encoding: utf-8
#v0.2

if RUBY_VERSION.start_with?("1.8")
  $KCODE = "u"
  require 'rubygems'
end

require 'taglib'
require 'uri'
require 'htmlentities'


FMT = "[%4i] %s - %s"

TYPES = ["Mp3", "Ogg", "Flac"]

TYPES_MULTICASE = TYPES.map(&:downcase) + TYPES.map(&:upcase) + TYPES
TYPES_GLOB      = TYPES_MULTICASE.map{|ext| "*.#{ext}" }
TYPES_GLOB_REC  = TYPES_MULTICASE.map{|ext| "**/*.#{ext}" }

input = `kdialog --textinputbox "Verzeichnisse in die Textbox ziehen:" ""`
exit(1) if $?.exitstatus != 0
dirs = input.split("\n").map{|s| URI.decode(s[%r{file://(.+)$},1]) }

if dirs.uniq.size != dirs.size
  exit(0) unless system('kdialog --warningyesno "Gleiche Verzeichnisse als Eingabe bekommen.\n'\
                        'Mehrfachnennungen werden ignoriert. Fortsetzen?"')
end

changes = []
longest = -1
dirs.uniq.each do |dir|
  Dir.chdir(dir)
  match = Dir[*TYPES_GLOB].first || Dir[*TYPES_GLOB_REC].first
  unless match
    $stderr.puts "Konnte keine Musikdatei in #{dir} (oder Unterverzeichnissen) finden."
    next
  end

  TagLib::FileRef.open(match){|f|
    tags = f.tag
    changes << [ dir, FMT % [tags.year, tags.artist, tags.album] ]
    longest = [longest,changes.last.last.size].max
  }
end

str = "<table>"
longest = -1
coder = HTMLEntities.new
changes.each{|dold,dnew|
  str << "<tr><td><pre>" << coder.encode(dold.ljust(longest)) << 
         "</pre></td><td>&nbsp;&nbsp;→&nbsp;&nbsp;</td><td><pre>" << 
         coder.encode(dnew) << "</pre></td></tr>\n"
}
str << "</table>"

if system("kdialog --yesno \"<b>Bitte bestätigen:</b>\n#{str}\"")
  changes.each{|dold,dnew|
    File.rename(dold, dold[%r{^(.+/)[^/]*$},1] << dnew)
  }
end