# note, you need two gems installed:
#  sudo gem install xmlsimple
#
# The second gem requires the id3lib utility to be installed.
# On Mac OS X via Darwin Ports:
#  sudo port install id3lib
#  sudo gem install id3lib-ruby

require 'net/http'
require 'uri'
require 'rubygems'
require 'xmlsimple'
require 'id3lib'

BASE_URL = URI.parse('http://www.coachella.com/')

def http_get_body(remote_path)
  res = Net::HTTP.start(BASE_URL.host, BASE_URL.port) {|http|
    http.get(remote_path)
  }
  return res.body
end

def download(remote_path, filename)
  data = http_get_body(remote_path)
  File.open(filename, 'w') do |f|
    f.write(data)
  end
end

def download_image(url)
  remote_path = url.gsub 'http://coachella.com', ''
  filename = File.basename(remote_path)
  download(remote_path, filename)
  return filename
end

# get the xml file
xml_data = http_get_body '/media/audiomp3.xml.php'

# parse xml into a collection of tracks
doc = XmlSimple.xml_in(xml_data)

tracks = doc['audio']
count = tracks.size
track_number = 0
tracks.each do |track|
  filename = "#{track['artist'].first} - #{track['title'].first}.mp3"
  track_number+=1
  puts "Saving #{track_number}/#{count}: #{filename} via #{track['flv'].first}"

  download(track['flv'].first, filename)
  image_file = download_image(track['visual'].first)

  tag = ID3Lib::Tag.new(filename)
  tag.title = track['title'].first
  tag.artist = track['artist'].first
  tag.album = 'Coachella 2008'
  tag.part_of_set = "#{track_number}"
  tag.comment = 'From the Coachella 2008 Website'
  
  cover = {
    :id          => :APIC,
    :mimetype    => 'image/jpeg',
    :picturetype => 3,
    :description => track['artist'].first,
    :textenc     => 0,
    :data        => File.read(image_file)
  }
  tag << cover  
  
  tag.update!
end