AppSettingsView: show switch for background permission

data/applications.gresource.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gresources>
+  <gresource prefix="/io/elementary/settings/icons">
+    <file alias="permissions-background.svg" compressed="true">background.svg</file>
+  </gresource>
+</gresources>

data/meson.build

@@ -1,3 +1,9 @@
+gresource = gnome.compile_resources(
+    'applications-resources',
+    'applications.gresource.xml',
+    source_dir: meson.current_source_dir()
+)
+
 i18n.merge_file(
     input: 'applications.metainfo.xml.in',
     output: 'io.elementary.settings.applications.metainfo.xml',

src/Permissions/Backend/PermissionStore.vala

@@ -0,0 +1,99 @@
+/*
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ * SPDX-FileCopyrightText: 2023 elementary, Inc. (https://elementary.io)
+ */
+
+[DBus (name = "org.freedesktop.impl.portal.PermissionStore", timeout = 120000)]
+public interface PermissionStoreDBus : GLib.Object {
+    public signal void changed (string table, string id, bool deleted, GLib.Variant data, [DBus (signature = "a{sas}")] GLib.Variant permissions);
+    public abstract async void set_permission (string table, bool create, string id, string app, string[] permissions) throws DBusError, IOError;
+    public abstract async string[] get_permission (string table, string id, string app) throws DBusError, IOError;
+}
+
+public class Permissions.PermissionStore : GLib.Object {
+    public signal void changed ();
+
+    private const string DBUS_NAME = "org.freedesktop.impl.portal.PermissionStore";
+    private const string DBUS_PATH = "/org/freedesktop/impl/portal/PermissionStore";
+    private const uint RECONNECT_TIMEOUT = 5000U;
+
+    private static PermissionStore? instance;
+    public static unowned PermissionStore get_default () {
+        if (instance == null) {
+            instance = new PermissionStore ();
+        }
+
+        return instance;
+    }
+
+    public PermissionStoreDBus dbus { get; private set; default = null; }
+
+    construct {
+        Bus.watch_name (
+            BusType.SESSION, DBUS_NAME, AUTO_START,
+            () => try_connect (), name_vanished_callback
+        );
+    }
+
+    private PermissionStore () { }
+
+    private void try_connect () {
+        Bus.get_proxy.begin<PermissionStoreDBus> (SESSION, DBUS_NAME, DBUS_PATH, 0, null, (obj, res) => {
+            try {
+                dbus = Bus.get_proxy.end (res);
+                dbus.changed.connect (() => changed ());
+            } catch (Error e) {
+                critical (e.message);
+                Timeout.add (RECONNECT_TIMEOUT, () => {
+                    try_connect ();
+                    return GLib.Source.REMOVE;
+                });
+            }
+        });
+    }
+
+    private void name_vanished_callback (DBusConnection connection, string name) {
+        dbus = null;
+    }
+
+    public void set_permission (string table, string id, string app, string[] permissions) {
+        dbus.set_permission.begin (table, false, id, app, permissions, (obj, res) => {
+            try {
+                dbus.set_permission.end (res);
+            } catch (Error e) {
+                critical (e.message);
+                var dialog = new Granite.MessageDialog (
+                    _("Couldn't set permission"),
+                    e.message,
+                    new ThemedIcon ("preferences-system")
+                ) {
+                    badge_icon = new ThemedIcon ("dialog-error"),
+                    modal = true,
+                    transient_for = ((Gtk.Application) GLib.Application.get_default ()).active_window
+                };
+                dialog.present ();
+                dialog.response.connect (dialog.destroy);
+            }
+        });
+    }
+
+    public async string[] get_permission (string table, string id, string app) {
+        try {
+            return yield dbus.get_permission (table, id, app);
+        } catch (Error e) {
+            var dialog = new Granite.MessageDialog (
+                _("Couldn't get permission"),
+                e.message,
+                new ThemedIcon ("preferences-system")
+            ) {
+                badge_icon = new ThemedIcon ("dialog-error"),
+                modal = true,
+                transient_for = ((Gtk.Application) GLib.Application.get_default ()).active_window
+            };
+            dialog.present ();
+            dialog.response.connect (dialog.destroy);
+        }
+
+        return { null };
+    }
+}