Ruby MP3 CD

require 'find'require 'pp'class DiscFullError < Exceptionendclass ToolFailedError < Exceptionendclass Mp3CD  attr_reader :files,:size  def initialize    @files=Hash.new    @size=0    @tempfiles = []    @@decoders=[ \    [ /flac$/i , proc{|file| "flac.exe -d -o - \"#{file}\" "}], \    [ /wv$/i  , proc{|file| "wvunpack.exe \"#{file}\" - " }]]    @@encoder_ext = "mp3"    @@encoder = proc{ |name| "lame -V4 --vbr-new - \"#{name}\"" }    @@speed = 16    @@device = "0,0,0" #run `cdrecord -checkbus` to find device number  end  def add file,folder    @size += FileTest.size file[0]    if (@size > 700*1024*1024)      @size -= FileTest.size file[0]      raise DiscFullError    end    @files[folder] ||= []    @files[folder] << file  end  def transcode_or_append file,folder    if (/\.mp3$/i =~ file) || (/\.wma$/i =~ file)      add([file,file.split('/').last],folder)    else       @@decoders.each do |decoder|          match = decoder[0].match(file)          if match            temp = make_tmp_name @@encoder_ext            convert(file,decoder[1],temp,@@encoder)            @tempfiles << temp            add([temp,file.split('/').last.gsub(match[0],@@encoder_ext)],folder)          end        end    end  end  def convert file,decoder,temp,encoder    raise ToolFailedError unless system(decoder.call(file)+"|"+encoder.call(temp))  end  def make_tmp_name ext    loop do      dir=File.join(ENV['TEMP'].gsub("\\","/"),"burn_"+rand(100000).to_s+"."+ext)      return dir unless File.exist? dir      end  end  def << file    file = file.gsub("\\","/")    if FileTest.file? file      transcode_or_append(file,:root)    elsif FileTest.directory? file      Find.find file do |path|          if FileTest.file? path            transcode_or_append(path,File.dirname(path)[File.dirname(file).length..-1])          end        end      end  end  def burn      pathmap=File.open("paths.txt","wb")  # 'wb' `cos need unix line-endings for mkisofs     @files.each_pair do |folder, filess|        filess.each do |file|          pathmap<< File.join(folder==:root ? "/" : folder,file[1])+"="+file[0]+"\n"          end        end        pathmap.close        iso = make_tmp_name "iso"        #You could run without the image by using mkisofs | cdrecord, might be risky        raise ToolFailedError unless system("mkisofs -J -r -graft-points -path-list paths.txt -o \"#{ iso }\"")        @tempfiles << iso        raise ToolFailedError unless system("cdrecord -v driveropts=burnfree speed=#{@@speed} dev=#{@@device} #{iso}")    end  def del_temp      if @tempfiles        @tempfiles.each { |file| File.delete file }      end    endendputs "Cheap burning tool"puts "Drag Folders and Files into this window and press enter twice when done."puts "> "cd=Mp3CD.newloop do  begin    break if gets.strip.split(/"{1,2}/).each { |match| cd << match }.empty?  rescue DiscFullError    puts "File could not be added. Disc Full."  rescue ToolFailedError    puts "An external command failed."  end  puts "Current size: #{ cd.size / 1024 / 1024 }MB"  puts "> "endputs "Thank you. Preparing to burn..."cd.burnputs "Burnt. Deleting temp files..."cd.del_tempputs "Done."system("pause")