Flash messages helper with filter before print them

flash_messages_helper.rb

module FlashMessagesHelper
  def flash_messages
    safe_buffer do |html|
      filtered_flash_messages.each do |name, message|
        html << content_tag(:div, content_tag(:p, message), :class => "message #{name}")
      end
    end
  end

  private

  def safe_buffer(&block)
    buffer = ActiveSupport::SafeBuffer.new
    yield buffer if block_given?
    buffer.html_safe
  end

  def filtered_flash_messages
    [:timedout].each do |type|
      flash.discard(type)
    end

    flash
  end
end