;; disfluid, implementation of the Solid specification
;; Copyright (C) 2021  Vivien Kraus

;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU Affero General Public License as
;; published by the Free Software Foundation, either version 3 of the
;; License, or (at your option) any later version.

;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU Affero General Public License for more details.

;; You should have received a copy of the GNU Affero General Public License
;; along with this program.  If not, see <https://www.gnu.org/licenses/>.

(define-module (webid-oidc parameters)
  #:use-module (srfi srfi-19)
  #:use-module (web client)
  #:export
  (
   data-home
   cache-home
   current-date
   authorization-code-default-validity
   oidc-token-default-validity
   dpop-proof-validity
   anonymous-http-request
   )
  #:declarative? #t)

(define data-home
  (make-parameter
   (format #f "~a/disfluid"
           (or (getenv "XDG_DATA_HOME")
               (format #f "~a/.local/share"
                       (getenv "HOME"))))))

(define cache-home
  (make-parameter
   (format #f "~a/disfluid"
           (or (getenv "XDG_CACHE_HOME")
               (format #f "~a/.cache"
                       (getenv "HOME"))))))

(define current-date
  ;; This parameter is a thunk!
  (make-parameter
   (lambda ()
     (time-utc->date (current-time)))
   (lambda (thunk)
     (lambda ()
       (let ((date (if (thunk? thunk)
                       (thunk)
                       thunk)))
         (when (integer? date)
           (set! date (make-time time-utc 0 date)))
         (when (time? date)
           (set! date (time-utc->date date)))
         date)))))

(define anonymous-http-request
  (make-parameter http-request))

(define authorization-code-default-validity
  (make-parameter 120))

(define oidc-token-default-validity
  (make-parameter 3600))

(define dpop-proof-validity
  (make-parameter 30))