gistfile1.txt

** Invoke library:build (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute library:build
rake aborted!
undefined method `external_encoding' for #<String:0xa5e559c>
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/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.8/lib/active_support/lazy_load_hooks.rb:36:in `instance_eval'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.8/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.8/lib/active_support/lazy_load_hooks.rb:43:in `block in run_load_hooks'
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/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-3.2.8/lib/active_record/base.rb:721:in `<top (required)>'
/media/sf_Devs/projetos/soad/app/models/country.rb:1:in `<top (required)>'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:469:in `load'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:469:in `block in load_file'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:639:in `new_constants_in'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:468:in `load_file'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:353:in `require_or_load'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:502:in `load_missing_constant'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:192:in `block in const_missing'
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/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:190:in `const_missing'
/media/sf_Devs/projetos/soad/lib/tasks/library.rake:11:in `block (2 levels) in <top (required)>'
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/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.0.1/lib/rake/task.rb:166:in `block in invoke_with_call_chain'
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/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.0.1/lib/rake/application.rb:71:in `block in run'
/usr/local/lib/ruby/gems/1.9.1/gems/rake-10.0.1/lib/rake/application.rb:158:in `standard_exception_handling'
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/usr/local/bin/rake:23:in `load'
/usr/local/bin/rake:23:in `<main>'
Tasks: TOP => library:build

library.rb

namespace :mp3 do

  task "build-library" => :environment do
    music, albumart = read_collections_from_file
    directories = {}
    collections = {}
    countries = {}
    artists = {}
    albums = {}
    genres = {}
    no_country = Country.create(:name => "...")
    countries["..."] = no_country

    Album.transaction do
      music.each do |filename|
        info = filename.split("\\")

        next if info.size < 6

        # D:\MP3\Death Metal\Behemoth (Pol)\2004 - Demigod\01 - Sculpting The Throne Ov Seth.mp3
        base, collection_name, genre_name, artist_name, album_name, song_name = info
        collection, genre, country, artist, album = nil

        collection = collections[collection_name] ||= Collection.create(:name => collection_name, :path => base + "\\" + collection_name)
        genre = genres[genre_name] ||= Genre.create(:name => genre_name)

        artist_name, country_name = parse_artist_and_country(artist_name)
        artist_uid = genre_name + "\\" + artist_name + "\\" + country_name
        country = country_name.nil? ? no_country : (countries[country_name] ||= Country.create(:name => country_name))
        artist = artists[artist_uid] ||= Artist.create(:name => artist_name, :country => country, :genre => genre)
        year, album_name = parse_year_and_album(album_name)
        uid = [base, collection_name, genre_name, country_name, artist_name, year, album_name].join("\\")

        if albums[uid].nil?
          albums[uid] = \
            Album.create(:title => album_name, :year => year, 
                         :collection => collection,
                         :artist => artist)
        end

        directories[uid] ||= []
        directories[uid] << song unless song.nil?
      end

      directories.each do |directory, songs|
        next if songs.empty?
        albums[directory].uid = Digest::SHA1.hexdigest(songs.inspect)
        albums[directory].save
      end
    end
  end

  def parse_artist_and_country(input)
    if input[-5].to_s + input[-1].to_s == "()"
      [input[0..-7], input[-4..-2]]
    else
      [input, nil]
    end
  end

  def parse_year_and_album(input)
    if input[4..6].to_s == " - " and input[0..3][/\d{4}/] == input[0..3]
      [input[0..3], input[7..-1]]
    else
      ["0000", input]
    end
  end


  def read_collections_from_glob
    music_files = []
    albumart_files = []
  
    Collection.all.each do |c|
      music_files += Dir.glob("#{c.path}\\**\\*.mp3")
      albumart_files += Dir.glob("#{c.path}\\**\\folder.jpg")
    end

    [ music_files, albumart_files ]
  end

  def read_collections_from_file
    def read(filename)
      File.open(filename, "r:iso-8859-1") { |f| f.read.split("\n") }
    end

    [
      read("data/albuns.txt"),
      read("data/folder.txt")
    ]
    
  end

end