;; Copyright 2007-2011, Matthew Welland.
;; 
;;  This program is made available under the GNU GPL version 2.0 or
;;  greater. See the accompanying file COPYING for details.
;; 
;;  This program is distributed WITHOUT ANY WARRANTY; without even the
;;  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;;  PURPOSE.

(declare (unit session))
(require-library dbi)
(require-extension regex)
(declare (uses cookie))

;; sessions table
;; id session_id session_key
;; create table sessions (id serial not null,session-key text);

;; session_vars table

  (let* ((rawconfigdat (session:read-config self))
	 (configdat (if rawconfigdat (eval rawconfigdat) '()))
	 (sroot     (s:find-param 'sroot    configdat))
	 (logfile   (s:find-param 'logfile  configdat))
	 (dbtype    (s:find-param 'dbtype   configdat))
	 (dbinit    (s:find-param 'dbinit   configdat))
	 (domain    (s:find-param 'domain   configdat))
	 (twikidir  (s:find-param 'twikidir configdat))
	 (page-dir  (s:find-param 'page-dir-style configdat)))
    (if sroot    (sdat-set-sroot!    self sroot))
    (if logfile  (sdat-set-logfile!  self logfile))
    (if dbtype   (sdat-set-dbtype!   self dbtype))
    (if dbinit   (sdat-set-dbinit!   self dbinit))
    (if domain   (sdat-set-domain!   self domain))
    (if twikidir (sdat-set-twikidir! self twikidir))
    (sdat-set-page-dir-style! self page-dir)
    ;; (print "configdat: ")(pp configdat)
    ;;(session:log self "sroot: " sroot " logfile: " logfile " dbtype: " dbtype 
    ;;		 " dbinit: " dbinit " domain: " domain " page-dir-style: " page-dir)
    )
  )
;;   (let ((dbtype (sdat-get-dbtype self)))

;; session vars
;; 1. keys are always a string NOT a symbol
;; 2. values are always a string conversion is the responsibility of the 
;;    consuming function (at least for now, I'd like to change this)

;; set a session var for the current page
;;
(define (session:curr-page-set! self key value)
  (hash-table-set! (sdat-get-pagevars self) (s:any->string key) (s:any->string value)))

;; del a var for the current page
;;
(define (session:page-var-del! self key)
  (hash-table-delete! (sdat-get-pagevars self) (s:any->string key)))

;; get the appropriate hash given a page "*sessionvars*, *globalvars* or page
;;
(define (session:get-page-hash self page)
  (if (string=? page "*sessionvars*")
      (sdat-get-sessionvars self)
      (if (string=? page "*globalvars*")
	  (sdat-get-globalvars self)
	  (sdat-get-pagevars self))))

;; set a session var for a given page
;;
(define (session:set! self page key value)
  (let ((ht (session:get-page-hash self page)))
    (hash-table-set! ht (s:any->string key) (s:any->string value))))

;; 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)
  (let ((ht (session:get-page-hash self page)))
    (hash-table-ref/default ht key #f)))

    (session:get-param-from params key)))

;; This one will get the first value found regardless of form
(define (session:get-input self key)
  (let* ((formdat (sdat-get-formdat self)))
    (if (not formdat) #f
	(if (or (string? key)(number? key)(symbol? key))
	    (if (and (vector? formdat)(eq? (vector-length formdat) 1)(hash-table? (vector-ref formdat 0)))
		(formdat:get formdat key)
		(begin
		  (session:log self "ERROR: formdat: " formdat " is not of class <formdat>")
		  #f))
	    (session:log self "ERROR: bad key " key)))))

(define (session:run-actions self)