ActiveFedora decorators

base_decorator.rb

ActiveFedora::Base.class_eval do

  # method_missing is defined, so adding methods                                                                                                        

  def auditable?
    begin
      self.is_a? ActiveFedora::Auditable
    rescue
      false
    end
  end

  def has_permissions?
    self.is_a? Hydra::ModelMixins::RightsMetadata
  end

  def governable?
    !is_governed_by_association.nil?
  end

  private

  def governed_by_association
    self.reflections.each do |name, reflection|
      # FIXME add class name condition, i.e.:                                                                                                           
      # && reflection.class_name == [Hydra configured policy class or Hydra::AdminPolicy]                                                               
      return reflection if reflection.macro == :belongs_to && reflection.options[:property] == :is_governed_by
    end
  end

end

datastream_decorator.rb

ActiveFedora::Datastream.class_eval do

  def method_missing(meth)
    case
    when meth == :current_version? then @current_version ||= (new? || versions.empty? || dsVersionID == versions.first.dsVersionID)
    when meth == :content_is_url? then external? || redirect?
    when meth == :content_is_uploadable? then managed? || inline?
    when meth == :content_is_editable? then !content_is_url? && content_is_text?
    when meth == :content_is_text? then !mimeType.blank? && (mimeType.start_with?('text/') || FcrepoAdmin.extra_text_mime_types.include?(mimeType))
    else super
    end
  end

end