discourse/app/controllers/education_controller.rb

class EducationController < ApplicationController

  before_filter :ensure_logged_in

  def show
    raise Discourse::InvalidAccess.new unless params[:id] =~ /^[a-z0-9\-\_]+$/
    raise Discourse::NotFound.new if I18n.t("education.#{params[:id]}", default: MISSING_KEY) == MISSING_KEY


    education_posts_text = I18n.t('education.until_posts', count: SiteSetting.educate_until_posts)

    markdown_content = ""
    if params[:id] == 'new-topic'
      markdown_content = SiteContent.content_for(:education_new_topic, education_posts_text: education_posts_text)
    else
      markdown_content = SiteContent.content_for(:education_new_reply, education_posts_text: education_posts_text)
    end

    render text: PrettyText.cook(markdown_content)
  end

  private
  MISSING_KEY = '_MISSING_KEY_'.freeze

end