Embedding TimeCert in your rails app

article.rb

require 'digest/sha1'
class Article < ActiveRecord::Base
  before_save :update_digest
  
  def full_text
    "#{title}\n\n#{body}"
  end

  protected

  def update_digest
    self.digest=Digest::SHA1.hexdigest(self.full_text) 
  end
end

timecert_helper.rb

module TimecertHelper
  def display_timecert_for(article)
    "<div class=\"timecert\"><iframe src=\"https://timecert.org/#{article.digest}.iframe\" width=\"500\" height=\"30\"></iframe></div>"
  end
end