+ (with-session
+ (locked-queue:dequeue (update-queue *session*))))
+
+(defmethod send ((s session) string)
+ "Push a javascript update fragment to the client."
+ (locked-queue:enqueue (update-queue s) string))
+
+(defmethod prompt ((s session) minutes btus)
+ (send s (format nil "prompt(~a,~a);~%" minutes btus)))
+
+(defmethod data ((s session) message)
+ (send s (parenscript:ps* `(msg ,message))))
+
+(defmacro with-session (&body body)
+ `(let ((*session* (session-value 'session)))
+ (if *session*
+ (progn ,@body)
+ (redirect +login-page+))))
+
+;; destination of login-form
+(defun login-action ()
+ (handler-case
+ (let ((session (make-session (post-parameter "username")
+ (post-parameter "password"))))
+ (setf (session-value 'session) session)
+ (redirect +root-url+))
+ (usocket:connection-refused-error (e)
+ (format nil "Connection error: ~a~%" e))))
+
+(defun command-action ()
+ (with-session
+ (empire:send-message (connection *session*) (get-parameter "q"))))
+
+(defun root-page ()
+ (with-session
+ (handle-static-file (concatenate 'string +static-files-root+ +root-page-file+))))