Untitled

  has_attached_file :file, :styles => lambda { |media_file| media_file.instance.media_type == 'image' ? IMAGE_VERSIONS : {} },
                    :storage => :s3,
                    :path => ":storage_path",
                    :bucket => lambda{ |media_file|  media_file.instance.bucket_name },
                    :s3_credentials => "#{RAILS_ROOT}/config/s3.yml",
                    :url => ":s3_eu_url"

  before_save :normalize_file_file_name

  # == Filename helper
  Paperclip.interpolates :normalized_file_file_name do |attachment, style|
    attachment.instance.normalized_file_file_name
  end

  def normalized_file_file_name
    transliterate(self.file_file_name)
  end

  def normalize_file_file_name
    self.file_file_name = normalized_file_file_name
  end

  def storage_path
    if media_type == 'image'
      ":attachment/:id/:style/:filename"
    else
      ":normalized_file_file_name"
    end
  end

  def transliterate(string)
    s = Iconv.iconv('ascii//ignore//translit', 'utf-8', string).to_s
    s.downcase!
    s.gsub!(/'/, '')
    s.gsub!(/[^A-Za-z0-9_\.]+/, ' ')
    s.strip!
    s.gsub!(/\ +/, '-')
    return s
  end