display: connect to accountsservice from display object

The idea is to eventually gut GdmSimpleSlave, so start by
copying some of its functionality over to the display.

This commit copies accountsservice user listing.

1 files changed, 68 insertions, 3 deletions

diff --git a/daemon/gdm-display.c b/daemon/gdm-display.c
index 04f8fb82..6f85aac8 100644
--- a/daemon/gdm-display.c
+++ b/daemon/gdm-display.c
@@ -73,9 +73,12 @@ struct GdmDisplayPrivate
         GdmDBusDisplay       *display_skeleton;
         GDBusObjectSkeleton  *object_skeleton;
 
+        GDBusProxy           *accountsservice_proxy;
+
         guint                 is_local : 1;
         guint                 is_initial : 1;
         guint                 allow_timed_login : 1;
+        guint                 have_existing_user_accounts : 1;
 };
 
 enum {
@@ -93,6 +96,7 @@ enum {
         PROP_SLAVE_TYPE,
         PROP_IS_INITIAL,
         PROP_ALLOW_TIMED_LOGIN,
+        PROP_HAVE_EXISTING_USER_ACCOUNTS
 };
 
 static void     gdm_display_class_init  (GdmDisplayClass *klass);
@@ -522,6 +526,58 @@ gdm_display_real_prepare (GdmDisplay *self)
         return TRUE;
 }
 
+static void
+on_list_cached_users_complete (GObject       *proxy,
+                               GAsyncResult  *result,
+                               GdmDisplay    *self)
+{
+        GVariant *call_result;
+        GVariant *user_list;
+
+        call_result = g_dbus_proxy_call_finish (G_DBUS_PROXY (proxy), result, NULL);
+
+        if (!call_result) {
+                self->priv->have_existing_user_accounts = FALSE;
+        } else {
+                g_variant_get (call_result, "(@ao)", &user_list);
+                self->priv->have_existing_user_accounts = g_variant_n_children (user_list) > 0;
+                g_variant_unref (user_list);
+                g_variant_unref (call_result);
+        }
+
+        gdm_slave_start (self->priv->slave);
+}
+
+static void
+on_accountsservice_ready (GObject        *object,
+                          GAsyncResult   *result,
+                          GdmDisplay     *self)
+{
+        GError *local_error = NULL;
+
+        self->priv->accountsservice_proxy = g_dbus_proxy_new_for_bus_finish (result, &local_error);
+        if (!self->priv->accountsservice_proxy) {
+                g_error ("Failed to contact accountsservice: %s", local_error->message);
+        }
+
+        g_dbus_proxy_call (self->priv->accountsservice_proxy, "ListCachedUsers", NULL, 0, -1, NULL,
+                           (GAsyncReadyCallback)
+                           on_list_cached_users_complete, self);
+}
+
+static void
+look_for_existing_users_and_start_slave (GdmDisplay *self)
+{
+        g_dbus_proxy_new (self->priv->connection,
+                          0, NULL,
+                          "org.freedesktop.Accounts",
+                          "/org/freedesktop/Accounts",
+                          "org.freedesktop.Accounts",
+                          NULL,
+                          (GAsyncReadyCallback)
+                          on_accountsservice_ready, self);
+}
+
 gboolean
 gdm_display_prepare (GdmDisplay *self)
 {
@@ -556,8 +612,7 @@ gdm_display_manage (GdmDisplay *self)
         }
 
         g_timer_start (self->priv->slave_timer);
-
-        gdm_slave_start (self->priv->slave);
+        look_for_existing_users_and_start_slave (self);
 
         return TRUE;
 }
@@ -844,6 +899,9 @@ gdm_display_get_property (GObject        *object,
         case PROP_IS_INITIAL:
                 g_value_set_boolean (value, self->priv->is_initial);
                 break;
+        case PROP_HAVE_EXISTING_USER_ACCOUNTS:
+                g_value_set_boolean (value, self->priv->have_existing_user_accounts);
+                break;
         case PROP_ALLOW_TIMED_LOGIN:
                 g_value_set_boolean (value, self->priv->allow_timed_login);
                 break;
@@ -1249,7 +1307,13 @@ gdm_display_class_init (GdmDisplayClass *klass)
                                                                NULL,
                                                                TRUE,
                                                                G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
-
+        g_object_class_install_property (object_class,
+                                         PROP_HAVE_EXISTING_USER_ACCOUNTS,
+                                         g_param_spec_boolean ("have-existing-user-accounts",
+                                                               NULL,
+                                                               NULL,
+                                                               FALSE,
+                                                               G_PARAM_READABLE));
         g_object_class_install_property (object_class,
                                          PROP_SLAVE_TYPE,
                                          g_param_spec_gtype ("slave-type",
@@ -1302,6 +1366,7 @@ gdm_display_finalize (GObject *object)
         g_clear_object (&self->priv->display_skeleton);
         g_clear_object (&self->priv->object_skeleton);
         g_clear_object (&self->priv->connection);
+        g_clear_object (&self->priv->accountsservice_proxy);
 
         if (self->priv->access_file != NULL) {
                 g_object_unref (self->priv->access_file);