source-dialog: Move Online Accounts panel spawn to utils

So that it can be reused by other files.

src/utils/gcal-utils.c

@@ -1188,3 +1188,58 @@ gcal_translate_child_window_position (GtkWidget *target,
 
   return TRUE;
 }
+
+void
+gcal_utils_launch_online_accounts_panel (GDBusConnection *connection,
+                                         const gchar     *action,
+                                         const gchar     *arg)
+{
+  g_autoptr (GDBusProxy) proxy = NULL;
+  GVariantBuilder builder;
+  GVariant *params[3];
+  GVariant *array[1];
+
+  g_variant_builder_init (&builder, G_VARIANT_TYPE ("av"));
+
+  if (!action && !arg)
+    {
+      g_variant_builder_add (&builder, "v", g_variant_new_string (""));
+    }
+  else
+    {
+      if (action)
+        g_variant_builder_add (&builder, "v", g_variant_new_string (action));
+
+      if (arg)
+        g_variant_builder_add (&builder, "v", g_variant_new_string (arg));
+    }
+
+  array[0] = g_variant_new ("v", g_variant_new ("(sav)", "online-accounts", &builder));
+
+  params[0] = g_variant_new_string ("launch-panel");
+  params[1] = g_variant_new_array (G_VARIANT_TYPE ("v"), array, 1);
+  params[2] = g_variant_new_array (G_VARIANT_TYPE ("{sv}"), NULL, 0);
+
+  proxy = g_dbus_proxy_new_sync (connection,
+                                 G_DBUS_PROXY_FLAGS_NONE,
+                                 NULL,
+                                 "org.gnome.ControlCenter",
+                                 "/org/gnome/ControlCenter",
+                                 "org.gtk.Actions",
+                                 NULL,
+                                 NULL);
+
+  if (!proxy)
+    {
+      g_warning ("Couldn't open Online Accounts panel");
+      return;
+    }
+
+  g_dbus_proxy_call_sync (proxy,
+                          "Activate",
+                          g_variant_new_tuple (params, 3),
+                          G_DBUS_CALL_FLAGS_NONE,
+                          -1,
+                          NULL,
+                          NULL);
+}

src/utils/gcal-utils.h

@@ -121,4 +121,9 @@ gboolean             gcal_translate_child_window_position        (GtkWidget
                                                                   gdouble              src_y,
                                                                   gdouble             *real_x,
                                                                   gdouble             *real_y);
+
+void                 gcal_utils_launch_online_accounts_panel     (GDBusConnection     *connection,
+                                                                  const gchar         *action,
+                                                                  const gchar         *arg);
+
 #endif /* __GCAL_UTILS_H__ */