[rygel] tracker: Honor 'nmm:uPnPShared' property

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit af4e79d938ee9a65098c5d3f303868c337852fa7
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Wed Oct 13 20:15:13 2010 +0300

    tracker: Honor 'nmm:uPnPShared' property
    
    Make sure we only expose items that are either explicity marked to be shared
    over UPnP network or not marked at all.

 .../tracker/rygel-tracker-selection-query.vala     |   18 ++++++++++++++----
 1 files changed, 14 insertions(+), 4 deletions(-)
---
diff --git a/src/plugins/tracker/rygel-tracker-selection-query.vala b/src/plugins/tracker/rygel-tracker-selection-query.vala
index 3f740b3..71e6cf7 100644
--- a/src/plugins/tracker/rygel-tracker-selection-query.vala
+++ b/src/plugins/tracker/rygel-tracker-selection-query.vala
@@ -27,6 +27,11 @@ using Gee;
  */
 public class Rygel.Tracker.SelectionQuery : Query {
     public const string ITEM_VARIABLE = "?item";
+    private const string SHARED_FILTER = "(!BOUND(nmm:uPnPShared(" +
+                                         ITEM_VARIABLE + ")) ||" +
+                                         " nmm:uPnPShared(" +
+                                         ITEM_VARIABLE +
+                                         ") = true)";
 
     public ArrayList<string> variables;
     public ArrayList<string> filters;
@@ -84,12 +89,17 @@ public class Rygel.Tracker.SelectionQuery : Query {
 
         query += " WHERE { " + base.to_string ();
 
-        if (this.filters.size > 0) {
+        var filters = new ArrayList<string> ();
+        filters.add_all (this.filters);
+        // Make sure we don't expose items that are marked not to be shared
+        filters.add (SHARED_FILTER);
+
+        if (filters.size > 0) {
             query += " FILTER (";
-            for (var i = 0; i < this.filters.size; i++) {
-                query += this.filters[i];
+            for (var i = 0; i < filters.size; i++) {
+                query += filters[i];
 
-                if (i < this.filters.size - 1) {
+                if (i < filters.size - 1) {
                     query += " && ";
                 }
             }