footnotes

footnotes.rb

class Redcarpet::Render::HTML
  def footnote_ref(number)
    @article_id ||= [*('a'..'z'),*('0'..'9')].shuffle[0,4].join

    fn_ref = "<sup id='fnref-#{@article_id}-#{number}'>"
    fn_ref << "<a href='#fn-#{@article_id}-#{number}' rel='footnote'>"
    fn_ref << "#{number}</a></sup>"
  end

  def footnote_def(content, number)
    fn_def = "<li id='fn-#{@article_id}-#{number}'>"
    content.gsub! "</p>", " <a href='#fnref-#{@article_id}-#{number}' rev='footnote'>↩</a></p>"

    fn_def << "#{content}</li>"
  end
end