;; webid-oidc, implementation of the Solid specification
;; Copyright (C) 2020, 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 authorization-page)
  #:use-module (webid-oidc errors)
  #:use-module ((webid-oidc authorization-page-unsafe) #:prefix unsafe:)
  #:use-module (ice-9 i18n)
  #:use-module (ice-9 string-fun)
  #:use-module (ice-9 receive)
  #:use-module (ice-9 threads))

(define locale-mutex
  (make-mutex))

(define-syntax with-locale
  (syntax-rules ()
    ((with-locale web-locale . job)
     (let ((locale-with-underscore
            (if (equal? web-locale "C")
                ;; For the unit tests
                "C"
                (string-append
                 (string-replace-substring web-locale "-" "_")
                 ".UTF-8")))
           (previous-locale (setlocale LC_ALL)))
       (dynamic-wind
         (lambda ()
           (lock-mutex locale-mutex))
         (lambda ()
           (dynamic-wind
             (lambda ()
               (with-exception-handler
                   (lambda (error)
                     (raise-unknown-client-locale web-locale locale-with-underscore)
                     (setlocale LC_ALL "C"))
                 (lambda ()
                   (setlocale LC_ALL locale-with-underscore))
                 #:unwind? #t))
             (lambda () . job)
             (lambda ()
               (setlocale LC_ALL previous-locale))))
         (lambda ()
           (unlock-mutex locale-mutex)))))))

(define-public (authorization-page
                locale credential-invalid? client-id post-uri)
  (with-locale
   locale
   (unsafe:authorization-page credential-invalid?
                              client-id post-uri)))

(define-public (error-no-client-id locale)
  (with-locale locale (unsafe:error-no-client-id)))

(define-public (error-no-redirect-uri locale)
  (with-locale locale (unsafe:error-no-redirect-uri)))

(define-public (error-application locale error)
  (with-locale locale (unsafe:error-application error)))

(define-public (redirection locale client-id uri)
  (with-locale locale (unsafe:redirection client-id uri)))