class MusicTrack

# File lib/playlist_transfer.rb, line 9
def initialize(trackfile,basedir)
  abort "File #{trackfile.expand_path} is not located in #{basedir.expand_path}" if !trackfile.expand_path.is_child?(basedir.expand_path)
  @path = trackfile.expand_path
  @basedir = basedir.expand_path
end

# File lib/playlist_transfer.rb, line 39
def encode_flac(outputfile)
wavtemp = Tempfile.new('wavfile')
info = self.get_tags
track = info['tracknumber'].gsub(/\D/,'')
system(
  'flac',
  '-s',
  '-d',
  '-f',
  '-o',
  wavtemp.path,
  @path.to_s
)
system(
  'lame',
  '--silent',
  '--replaygain-accurate',
  '--preset', 'cbr', '320',
  '-m', 's',
  '-q', '0',
  '--add-id3v2',
  '--tt', info['title'],
  '--ta', info['artist'],
  '--tl', info['album'],
  '--ty', info['date'],
  '--tn', track,
  '--tg', info['genre'] || 'Rock',
  wavtemp.path,
  outputfile.to_s
)

# If encoding process is interrupted (by pressinc Ctrl + C), remove probably incomplete file in destination.
rescue Interrupt
FileUtils.rm(outputfile) if outputfile.file?
abort "Interrupted when encoding #{outputfile}. Incomplete file removed from destination."
end

# File lib/playlist_transfer.rb, line 88
def filetransfer(outfile, justcopy = nil, skoda = nil, relative_path = nil, output = nil)
  abort "File #{@path.to_s} does not exist."  if !@path.file?
  outfile = outfile.sub(/\.flac$/i, '.mp3') if !justcopy
  # If file in destination already exists in destination, skip it, no need to tranfer it.
  if !outfile.file?
    puts "Transfering #{outfile.to_s}"
    outfile.dirname.mkpath
    if self.is_flac? && !justcopy
      self.encode_flac(outfile)
    else
      FileUtils.cp(@path.realpath,outfile)
    end
    # Quick and dirty fix for stuid SKODA audio system, to be able to shuffle all music on storage (Not just in folder like it usualy does)
    if skoda
      playlist_line = "/" + relative_path.to_s
      open("#{output}/ALL_MUSIC.M3U", 'a') { |f|
        f.puts playlist_line
      }
    end
  else
    puts "File #{outfile.to_s} already exists. Skipping..."
  end
end

# File lib/playlist_transfer.rb, line 18
def get_tags
tmpfile = Tempfile.new('flacdata')
system(
  'metaflac',
  "--export-tags-to=#{tmpfile.path}",
  '--no-utf8-convert',
  @path.to_s
)
data = tmpfile.open
tags = { 'title' => '', 'artist' => '', 'album' => '', 'date' => '', 'tracknumber' => '0' }
while line = data.gets
  m = line.match(/^(\w+)=(.*)$/)
  if m && m[2]
    tags[m[1].downcase] = m[2]
  end
end
return tags
end

# File lib/playlist_transfer.rb, line 77
def is_flac?
  if @path.extname.downcase == ".flac"
    return true
  else
    return false
  end
end

# File lib/playlist_transfer.rb, line 132
def just_copy(output)
  self.transfer(output, nil, true)
end

# File lib/playlist_transfer.rb, line 115
def transfer(output, compatible = nil, justcopy = nil, skoda = nil)
  abort "Can't write to #{output.to_s} or it is not directory." unless output.expand_path.directory? && output.expand_path.writable?

  # Next 3 lines just creates complete destination path for transfered track (combining desired output directory, current track location, and basedir). It also removes special characters if necessary.
  relative_path = @path.relative_path_from(@basedir)
  relative_path = relative_path.no_special_chars if compatible
  output_file = output.expand_path + relative_path

  self.filetransfer(output_file, justcopy, skoda, relative_path, output.expand_path)
end

# File lib/playlist_transfer.rb, line 127
def transfer_compatible(output, justcopy = nil)
  self.transfer(output, true, justcopy)
end