module Useless
  module Doc
    class Proxy

      # +Doc::Proxy::CSS+ serves the stylesheet for the current +Doc::UI+
      # iff the request path is '/doc.css'. Otherwise, it passes the request
      # down the stack.
      # 
      class CSS
        def initialize(app)
          @app = app
        end

        def call(env)
          if env["PATH_INFO"].to_s == '/doc.css'
            if env['useless.doc.logger']
              env['useless.doc.logger'].info "serving CSS for #{env['useless.doc.ui'].class.name}"
            end

            [200, {'Content-Type' => 'text/css'}, [env['useless.doc.ui'].css]]
          else
            @app.call(env)
          end
        end
      end
    end
  end
end