notificationDaemon: Avoid saving any notification if we've none

We used to save an empty variant, and load it for no reason, we can just
avoid saving at all (and deleting if needed)

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/4400>
(cherry picked from commit ee95df839920b20ae4633d1bfd89a97384fbee2f)

diff --git a/js/ui/notificationDaemon.js b/js/ui/notificationDaemon.js
index 9ea539c56a620e20d692afcaf1fb28167388c51c..26df9655ee7058ccfb80a73b223c7df7d2d4a1d8 100644 (file)
--- a/js/ui/notificationDaemon.js
+++ b/js/ui/notificationDaemon.js
@@ -665,7 +665,9 @@ class GtkNotificationDaemon {
         }
 
         global.set_persistent_state(NOTIFICATION_SERIALIZED_NAME,
-            new GLib.Variant(NOTIFICATION_SERIALIZED_FORMAT, sources));
+            sources.length
+                ? new GLib.Variant(NOTIFICATION_SERIALIZED_FORMAT, sources)
+                : null);
     }
 
     AddNotificationAsync(params, invocation) {