gui: add a widget to display all pending authorizations

4 files changed, 157 insertions, 1 deletions

diff --git a/po/POTFILES.in b/po/POTFILES.in
index 04cbadc..53cc8aa 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -43,6 +43,7 @@ src/scm/webid-oidc/client/gui/application-hooks.scm
 src/scm/webid-oidc/client/gui/account-widget.scm
 src/scm/webid-oidc/client/gui/accounts-widget.scm
 src/scm/webid-oidc/client/gui/authorization-prompt.scm
+src/scm/webid-oidc/client/gui/authorizations-widget.scm
 src/scm/webid-oidc/client/gui/client-widget.scm
 src/scm/webid-oidc/client/gui/clock.scm
 src/scm/webid-oidc/client/gui/settings.scm
diff --git a/src/scm/webid-oidc/client/gui/Makefile.am b/src/scm/webid-oidc/client/gui/Makefile.am
index 5e4f4c5..97b1cb6 100644
--- a/src/scm/webid-oidc/client/gui/Makefile.am
+++ b/src/scm/webid-oidc/client/gui/Makefile.am
@@ -22,7 +22,8 @@ dist_guiclientwebidoidcmod_DATA += \
   %reldir%/application-hooks.scm \
   %reldir%/application.scm \
   %reldir%/authorization-prompt.scm \
-  %reldir%/clock.scm
+  %reldir%/clock.scm \
+  %reldir%/authorizations-widget.scm
 
 guiclientwebidoidcgo_DATA += \
   %reldir%/settings.go \
@@ -32,4 +33,5 @@ guiclientwebidoidcgo_DATA += \
   %reldir%/application-hooks.go \
   %reldir%/application.go \
   %reldir%/authorization-prompt.go \
+  %reldir%/authorizations-widget.go \
   %reldir%/clock.go
diff --git a/src/scm/webid-oidc/client/gui/application.scm b/src/scm/webid-oidc/client/gui/application.scm
index 25708b8..bfd5f7a 100644
--- a/src/scm/webid-oidc/client/gui/application.scm
+++ b/src/scm/webid-oidc/client/gui/application.scm
@@ -38,6 +38,7 @@
   #:use-module ((webid-oidc client gui settings) #:prefix settings:)
   #:use-module ((webid-oidc client gui client-widget) #:prefix client:)
   #:use-module ((webid-oidc client gui accounts-widget) #:prefix accounts:)
+  #:use-module ((webid-oidc client gui authorizations-widget) #:prefix authorizations:)
   #:use-module (webid-oidc client gui application-hooks)
   #:use-module (web uri)
   #:use-module (web response)
@@ -68,9 +69,11 @@
                   #:application application))
         (client client:client-widget)
         (accounts accounts:accounts-widget)
+        (authorizations authorizations:authorizations-widget)
         (content (box:new (symbol->orientation 'horizontal) 12)))
     (box:pack-end content client #t #t 0)
     (box:pack-end content accounts #t #t 0)
+    (box:pack-end content authorizations #t #t 0)
     (add window content)
     (show-all window)))
 
diff --git a/src/scm/webid-oidc/client/gui/authorizations-widget.scm b/src/scm/webid-oidc/client/gui/authorizations-widget.scm
new file mode 100644
index 0000000..ba76185
--- /dev/null
+++ b/src/scm/webid-oidc/client/gui/authorizations-widget.scm
@@ -0,0 +1,150 @@
+;; 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)