;; 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 formdat))
(use regex)
(require-extension srfi-69)

(define formdat:*debug* #f)

;; Old data format was something like this. BUT! 
;; Forms do not have names so the hierarcy is
;; unnecessary (I think)
;;
;; hashtable
;;   |-formname --> <formdat> 'form-name=formname
;;   |                        'form-data=hashtable
;;   |                                       | name => value
;;
;; New data format is only the <formdat> portion from above

;; (define-class <formdat> ()
;;    (form-data
;;    ))
(define (make-formdat:formdat)(vector (make-hash-table)))
(define-inline (formdat:formdat-get-data   vec)    (vector-ref  vec 0))
(define-inline (formdat:formdat-set-data!  vec val)(vector-set! vec 0 val))

(define (formdat:initialize self)

  (formdat:formdat-set-data! self (make-hash-table)))


(define (formdat:get self key)
  (hash-table-ref/default (formdat:formdat-get-data self) key #f))

;; change to convert data to list and append val if already exists
;; or is a list
(define (formdat:set! self key val)
  (let ((prev-val (formdat:get self key))
        (ht       (formdat:formdat-get-data self)))
    (if prev-val
        (if (list? prev-val)
            (hash-table-set! ht key (cons val prev-val))
            (hash-table-set! ht key (list val prev-val)))
        (hash-table-set! ht key val))
    self))

(define (formdat:keys self)
  (hash-table-keys (formdat:formdat-get-data self)))

(define (formdat:printall self printproc)
  (printproc "formdat:printall " (formdat:keys self))
  (for-each (lambda (k)
	      (printproc k " => " (formdat:get self k)))
	    (formdat:keys self)))

(define (formdat:all->strings self)
  (let ((res '()))
    (for-each (lambda (k)
                 (set! res (cons (conc k "=>" (formdat:get self k)) res)))
              (formdat:keys self))
        res))

;; call with *one* of the lists in the list of lists created by CGI:url-unquote
(define (formdat:load self formlist)
  (let ((ht             (formdat:formdat-get-data self)))
    (if (null? formlist) self ;; no values provided, return self for no good reason
        (let loop ((head (car formlist))
                   (tail (cdr formlist)))
          (let ((key (car head))
                (val (cdr head)))
            ;; (err:log "key=" key " val=" val)
	    (if (> (length val) 1)

(define formdat:bin-data-name-rex (regexp "\\Wname=\"([^\"]+)\""))
(define formdat:bin-file-name-rex (regexp "\\Wfilename=\"([^\"]+)\""))
(define formdat:bin-file-type-rex (regexp "Content-Type:\\s+([^\\s]+)"))
(define formdat:delim-patt-rex    (regexp "^\\-+[0-9]+\\-*$"))

;; returns a hash with entries for all forms - could well use a proplist?
(define (formdat:load-all)
  (let ((request-method (get-environment-variable "REQUEST_METHOD")))
    (if (and request-method
	     (string=? request-method "POST"))
	(formdat:load-all-port (current-input-port)))))

;; (s:process-cgi-input (caaar dat))
(define (formdat:load-all-port inp)
  (let* ((formdat        (make-formdat:formdat)))
;;	 (debugp         (open-output-file (conc (slot-ref s:session 'sroot) "/delme-" (current-user-id) ".log"))))
    ;; (write-string (read-string #f inp) #f debugp)
    (let ((alldats (formdat:dat->list inp 10e6)))
      
      ;; (format debugp "formdat : alldats: ~A\n" alldats)
      (let ((firstitem   (car alldats))
	    (multipass #f))