foobarbazbaz.rb

gistfile1.rb

def collection_from_string(songs_as_string, artist_tags)
  songs_as_string.strip.split("\n").map do |line|
    name, artist, genre, tags = line.split('.').map(&:strip)
    genre, subgenre = genre.split(',').map(&:strip)
    tags = tags.to_s.split(',').push(genre).push(subgenre).concat(Array(artist_tags[artist])).reject(&:nil?).map(&:strip).map(&:downcase)
    {:name => name, :artist => artist, :genre => genre, :subgenre => subgenre, :tags => tags}
  end
end

def find_in_collection(collection, criteria)
  collection.select do |song|
    criteria.all? do |k, v|
      if k == :filter
        v.call(song)
      else
        Array(v).all? do |t|
          (k == :tags && t.end_with?('!')) ^ song[k].include?(k == :tags && t.chomp('!') || t)
        end
      end
    end
  end
end