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;; 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 client gui authorizations-widget)
#:use-module (gi)
#:use-module (gi types)
#:use-module (gi util)
#:use-module (ice-9 match)
#:use-module (ice-9 exceptions)
#:use-module (ice-9 i18n)
#:use-module (ice-9 receive)
#:use-module (ice-9 optargs)
#:use-module (ice-9 pretty-print)
#:use-module (ice-9 atomic)
#:use-module (srfi srfi-9)
#:use-module (srfi srfi-19)
#:use-module (srfi srfi-26)
#:use-module (webid-oidc errors)
#:use-module ((webid-oidc stubs) #:prefix stubs:)
#:use-module ((webid-oidc config) #:prefix config:)
#:use-module (webid-oidc web-i18n)
#:use-module (webid-oidc client client)
#:use-module (webid-oidc client accounts)
#:use-module (webid-oidc client gui authorization-prompt)
#:use-module ((webid-oidc client gui settings) #:prefix settings:)
#:use-module ((webid-oidc client gui clock) #:prefix clock:)
#:use-module (webid-oidc client gui application-hooks)
#:use-module (webid-oidc jwk)
#:use-module (webid-oidc oidc-id-token)
#:use-module (web uri)
#:use-module (web response)
#:use-module (rnrs bytevectors)
#:use-module (oop goops)
#:declarative? #t
#:duplicates (merge-generics)
#:export
(
authorizations-widget
use-authorizations-widget
))
(push-duplicate-handler! 'merge-generics)
;; This avoids a crash when compiling the module
(use-typelibs ("GdkPixbuf" "2.0")
("Gtk" "3.0"))
(define authorizations-widget #f)
(define by-uri (make-hash-table))
(define authorizations-widget #f)
;; Since authorizations may be requested by any threads, they are
;; collected here and a timer updates the GUI every so often.
(define pending-authorizations
(make-atomic-box '()))
(define (update-ui)
(let ((authz (atomic-box-ref pending-authorizations)))
(let ((confirmed (atomic-box-compare-and-swap! pending-authorizations authz '())))
(if (eq? authz confirmed)
(let add-authorization ((authz authz))
(match authz
(() ;; done
#t)
(((reason uri continuation) authz ...)
(let ((value (uri->string uri)))
(match (or (hash-ref by-uri value)
(receive (builder widget handle)
((@ (webid-oidc client gui authorization-prompt)
make-authorization-prompt) uri)
(let ((ret `(,builder ,widget ,handle)))
(hash-set! by-uri value ret)
(box:pack-start authorizations-widget widget #t #t 0)
ret)))
((_ widget handle)
;; Put it on top
(container:remove authorizations-widget widget)
(box:pack-start authorizations-widget widget #t #t 0)
;; Add (reason, continuation) to the
;; existing or created widget
(handle reason
(lambda (code)
;; When the button is
;; clicked, first remove
;; the widget if it still
;; exists
(when (hash-ref by-uri value)
(hash-remove! by-uri value)
(container:remove authorizations-widget widget))
((@ (ice-9 threads) call-with-new-thread)
(lambda ()
;; In case the
;; continuation expects
;; further authorizations:
(use-authorizations-widget
(lambda ()
(continuation code)))))))))))))
;; Else, retry
(update-ui)))))
(define (use-authorizations-widget f)
(let ((prompt (make-prompt-tag)))
(call-with-prompt prompt
(lambda ()
(parameterize
((authorization-process
(lambda* (uri #:key reason)
(abort-to-prompt
prompt
(lambda (continuation)
(let save ((other (atomic-box-ref pending-authorizations)))
(let ((confirmed
(atomic-box-compare-and-swap!
pending-authorizations
other
`((,reason ,uri ,continuation) ,@other))))
(unless (eq? confirmed other)
(save (atomic-box-ref pending-authorizations))))))))))
(f)))
(lambda (continuation handler)
(handler continuation)))))
(define (update-ui-next)
(update-ui)
(clock:wait
(lambda ()
(update-ui-next))))
(define (build-widget app)
(unless authorizations-widget
(set! authorizations-widget (box:new (symbol->orientation 'vertical) 8))
(clock:wait
(lambda ()
(update-ui-next)))))
(add-hook! application-activated-hook build-widget)
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