gistfile1.rb

require 'rubygems'
require 'nokogiri'

class EyeTunes
  attr_reader :tracks

  def initialize file
    @artists  = Hash.new { |artists,artist|
      artists[artist] = Hash.new { |albums,album|
        albums[album] = Hash.new { |tracks,track|
          tracks[track] = Struct.new(
            :name,
            :play_count,
            :time
          ).new(track, 0, 0)
        }
      }
    }

    @tracks = []

    @doc = Nokogiri::XML(File.open(file, 'rb'))
    @doc.xpath('/plist/dict/dict/dict').each do |thing|
      artist  = thing.at('./key[text() = "Artist"]').next.text rescue ""
      album   = thing.at('./key[text() = "Album"]').next.text rescue ""
      track   = thing.at('./key[text() = "Name"]').next.text

      rating = thing.at('./key[text() = "Rating"]').next rescue nil
      rating.content = 100 if rating

      time    = thing.at('./key[text() = "Total Time"]').next.text.to_i rescue 0
      count   = thing.at('./key[text() = "Play Count"]').next.text.to_i rescue 0

      track = @artists[artist][album][track]
      track.time = time
      track.play_count = count
      @tracks << track
    end
    File.open('whatever.xml', 'wb') { |f| f.write(@doc.to_s) }
  end

  def artists
    @artists.values
  end

  def albums
    @artists.map { |k,v| v.values }.flatten
  end

  def playtime
    time = 0
    tracks.map { |track|
      track.time * track.play_count
    }.each { |milliseconds|
      time += milliseconds
    }
    time / 1000.0
  end

  def top_awesome_tracks
    @artists.find_all { |artist,album|
      artist =~ /phil collins/i
    }.map { |k,v| v.values }.flatten
  end
end

if __FILE__ == $0
  eye_tunes = EyeTunes.new(ARGV[0])
  puts "Artist count: #{eye_tunes.artists.length}"
  puts "Album count: #{eye_tunes.albums.length}"
  puts "Track count: #{eye_tunes.tracks.length}"
  puts "Total playtime (in seconds): #{eye_tunes.playtime}"
  puts "#{eye_tunes.top_awesome_tracks.length} awesome songs" # Ryan has 0
end