app/helpers/application_helper.rb


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require 'redcarpet'
require 'rouge'
require 'rouge/plugins/redcarpet'

module ApplicationHelper

  class HTML < Redcarpet::Render::HTML
    include Rouge::Plugins::Redcarpet # yep, that's it.
  end

  def title(text)
    content_for :title, text
  end

  def sortable(col, title = nil)
    title ||= col.titleize
    css_class = (col == sort_column) ? "current #{sort_direction}" : nil
    direction = (col == sort_column and sort_direction == "asc") ? "desc" : "asc"
    link_to title, {:sort => col, :dir => direction}, {:class => css_class}
  end

  def markdown(text, params = {})
    options = { fenced_code_blocks: true, highlight: true }

    html_options = {}
    if params[:restricted]
      html_options[:filter_html] = true
    end

    Redcarpet::Markdown.new(HTML.new(html_options), options).render(text).html_safe
  end

end