[tracker/wip/carlosg/portal: 131/141] portal: Handle */default keywords in policy

[Carlos Garnacho <carlosg src gnome org>]

commit af0af5a31dafb007ac61c5055b18abc3d2b65152
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Jan 24 12:40:01 2020 +0100

    portal: Handle */default keywords in policy
    
    Those translate to CONSTRAINT GRAPH ALL and CONSTRAINT GRAPH DEFAULT,
    to let access to all graphs, or the default unnamed graph specifically.

 src/portal/tracker-portal-endpoint.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)
---
diff --git a/src/portal/tracker-portal-endpoint.c b/src/portal/tracker-portal-endpoint.c
index cebd6b590..a357d5383 100644
--- a/src/portal/tracker-portal-endpoint.c
+++ b/src/portal/tracker-portal-endpoint.c
@@ -26,6 +26,9 @@
 
 #include "tracker-portal-endpoint.h"
 
+#define GRAPH_ALL "*"
+#define GRAPH_DEFAULT "default"
+
 typedef struct _TrackerPortalEndpoint TrackerPortalEndpoint;
 typedef struct _TrackerPortalEndpointClass TrackerPortalEndpointClass;
 
@@ -75,7 +78,12 @@ tracker_portal_endpoint_filter_graph (TrackerEndpointDBus *endpoint_dbus,
        gint i;
 
        for (i = 0; endpoint->graphs[i]; i++) {
-               if (g_strcmp0 (graph_name, endpoint->graphs[i]) == 0) {
+               if (g_strcmp0 (endpoint->graphs[i], GRAPH_ALL) == 0) {
+                       return FALSE;
+               } else if (!graph_name &&
+                          g_strcmp0 (endpoint->graphs[i], GRAPH_DEFAULT) == 0) {
+                       return FALSE;
+               } else if (g_strcmp0 (graph_name, endpoint->graphs[i]) == 0) {
                        return FALSE;
                }
        }
@@ -99,7 +107,12 @@ tracker_portal_endpoint_add_prologue (TrackerEndpointDBus *endpoint_dbus)
                        if (i != 0)
                                g_string_append (str, ", ");
 
-                       g_string_append_printf (str, "<%s>", endpoint->graphs[i]);
+                       if (g_strcmp0 (endpoint->graphs[i], GRAPH_ALL) == 0)
+                               g_string_append (str, "ALL");
+                       else if (g_strcmp0 (endpoint->graphs[i], GRAPH_DEFAULT) == 0)
+                               g_string_append (str, "DEFAULT");
+                       else
+                               g_string_append_printf (str, "<%s>", endpoint->graphs[i]);
                }
 
                endpoint->prologue = g_string_free (str, FALSE);