;; disfluid, 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 errors)
  #:use-module ((webid-oidc stubs) #:prefix stubs:)
  #:use-module (ice-9 exceptions)
  #:use-module (ice-9 optargs)
  #:use-module (ice-9 match)
  #:use-module (srfi srfi-19)
  #:use-module (web uri)
  #:use-module (web response)
  #:declarative? #t
  #:export
  (
   &message-for-the-user
   make-message-for-the-user
   message-for-the-user?
   user-message

   fail
   ))

;; A message to show the user is an XHTML paragraph or equivalent (as
;; sxml). A div is used to contain multiple messages.

(define-exception-type
  &message-for-the-user
  &external-error
  make-message-for-the-user
  message-for-the-user?
  (message user-message))

(define (fail message)
  ;; Like error, but don’t do funny things when message is not a
  ;; string literal
  (raise-exception
   (make-exception
    (make-error)
    (make-exception-with-message message))))