;; get session vars for the current page
;;
(define (session:page-get self key)
  (hash-table-ref/default (sdat-get-pagevars self) key #f))

;; get session vars for a specified page
;;
(define (session:get self page key params)
  (let* ((ht  (session:get-page-hash self page))
	 (res (hash-table-ref/default ht (s:any->string key) #f)))
    (session:apply-type-preference res params)))

;; delete a session var for a specified page
;;
(define (session:del! self page key)
  (let ((ht (session:get-page-hash self page)))
    (hash-table-delete! ht (s:any->string key))))