auto_assets_helper.rb

module AutoAssetsHelper
  
  # Outputs script and link tags for js/css based on 
  # the current action, controller and layout. This 
  # should be preferred over adding assets within a 
  # view file for specific views/layouts/controllers.
  # 
  # Example: If UsersController#dashboard is requested 
  # and it uses the 'front' layout, these files will be 
  # included if they exist:
  # 
  # javascripts/users.js
  # javascripts/users/dashboard.js
  # javascripts/layouts/front.js
  # stylesheets/users.js
  # stylesheets/users/dashboard.js
  # stylesheets/layouts/front.js
  # 
  def auto_assets
    out = []
    c = params[:controller]
    a = params[:action]
    l = response.layout
    [l, c, "#{c}/#{a}"].each do |name|
      if File.exist?("public/stylesheets/#{name}.css")
        out << stylesheet_link_tag(name)
      end
      if File.exist?("public/javascripts/#{name}.js")
        out << javascript_include_tag(name)
      end
    end
    out.join("\n")
  end
  
end