parsley/app/helpers/application_helper.rb

module ApplicationHelper

  def timestamp(time)
    time ? time.strftime('%D %R') : ''
  end

  def nav_items
    [
        nav_item('Recipes', recipes_path, 'recipes'),
        nav_item('Ingredients', ingredients_path, 'ingredients')
    ]
  end

  def nav_item(name, url, controller)
    content_tag('li', link_to(name, url), class: active_for_controller(controller))
  end

  def active_for_controller(controller)
    if current_controller == controller
      'active'
    else
      ''
    end
  end

  def current_controller
    params[:controller]
  end
end