+(defclass session ()
+ ((update-queue
+ :accessor update-queue
+ :initform (locked-queue:create)
+ :documentation "Updates to be sent to the browser")
+ (connection
+ :accessor connection
+ :documentation "Connection to the empire game server")))
+
+(defun make-session (username password)
+ (let* ((session (make-instance 'session))
+ (connection (empire:connect :user username
+ :password password
+ :session session)))
+ (setf (slot-value session 'connection) connection)
+ session))
+
+(defgeneric send (session string))
+(defgeneric prompt (session string))
+(defgeneric data (session message))
+
+(defvar *empire-session*)
+
+(defmacro with-session (&body body)
+ `(let ((*empire-session* (session-value 'session)))
+ (if *empire-session*
+ (progn ,@body)
+ (redirect +login-page+))))
+
+(defun update ()
+ "Send stream of updates to client"
+ (with-session
+ (locked-queue:dequeue (update-queue *empire-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) p)
+ (send s (parenscript:ps* `(prompt ,p))))
+
+(defmethod data ((s session) message)
+ (send s (parenscript:ps* `(msg ,message))))
+
+;; destination of login-form
+(defun login-action ()
+ (handler-case
+ (let* ((user (post-parameter "username"))
+ (pass (post-parameter "password"))
+ (session (make-session user pass)))
+ (setf (session-value 'session) session)
+ (empire-log:info "~a: User ~a logging in." session user)
+ (redirect +root-url+))
+ (usocket:connection-refused-error (e)
+ (format nil "Connection error: ~a~%" e))))
+
+(defun command-action ()
+ (with-session
+ (empire:command (connection *empire-session*) (get-parameter "q"))
+ "ok"))
+
+(defun root-page ()
+ (with-session
+ (handle-static-file (concatenate 'string +static-files-root+ +root-page-file+))))
+