[gnome-photos/wip/favorites: 3/15] query-builder: Add a new flag and queries for the Favorites mode

[Debarshi Ray <debarshir src gnome org>]

commit b0471261361c7cc3a3101491a185faaff4495877
Author: Debarshi Ray <debarshir gnome org>
Date:   Wed Dec 12 23:07:15 2012 +0530

    query-builder: Add a new flag and queries for the Favorites mode

 src/photos-query-builder.c |   36 +++++++++++++++++++++++++++++++++++-
 src/photos-query-builder.h |    4 ++++
 src/photos-query.h         |    3 ++-
 3 files changed, 41 insertions(+), 2 deletions(-)
---
diff --git a/src/photos-query-builder.c b/src/photos-query-builder.c
index 804bcc1..2dcf571 100644
--- a/src/photos-query-builder.c
+++ b/src/photos-query-builder.c
@@ -96,7 +96,10 @@ photos_query_builder_query (gboolean global, gint flags)
   gchar *where_sparql;
 
   optional = photos_query_builder_optional ();
-  where_sparql = g_strconcat ("WHERE { ?urn a rdfs:Resource ", optional, NULL);
+  if (flags & PHOTOS_QUERY_FLAGS_FAVORITES)
+    where_sparql = g_strconcat ("WHERE { ?urn nao:hasTag nao:predefined-tag-favorite ", optional, NULL);
+  else
+    where_sparql = g_strconcat ("WHERE { ?urn a rdfs:Resource ", optional, NULL);
   g_free (optional);
 
   if (!(flags & PHOTOS_QUERY_FLAGS_UNFILTERED))
@@ -154,6 +157,27 @@ photos_query_builder_query (gboolean global, gint flags)
 
 
 PhotosQuery *
+photos_query_builder_count_favorites_query (void)
+{
+  gchar *filter;
+  gchar *optional;
+  gchar *sparql;
+
+  filter = photos_query_builder_filter ();
+  optional = photos_query_builder_optional ();
+  sparql = g_strconcat ("SELECT DISTINCT COUNT(?urn) WHERE { ?urn nao:hasTag nao:predefined-tag-favorite ",
+                        optional,
+                        filter,
+                        " }", NULL);
+
+  g_free (optional);
+  g_free (filter);
+
+  return photos_query_new (sparql);
+}
+
+
+PhotosQuery *
 photos_query_builder_count_query (void)
 {
   gchar *filter;
@@ -172,6 +196,16 @@ photos_query_builder_count_query (void)
 
 
 PhotosQuery *
+photos_query_builder_global_favorites_query (void)
+{
+  gchar *sparql;
+
+  sparql = photos_query_builder_query (TRUE, PHOTOS_QUERY_FLAGS_FAVORITES);
+  return photos_query_new (sparql);
+}
+
+
+PhotosQuery *
 photos_query_builder_global_query (void)
 {
   gchar *sparql;
diff --git a/src/photos-query-builder.h b/src/photos-query-builder.h
index 886c72f..46ae8aa 100644
--- a/src/photos-query-builder.h
+++ b/src/photos-query-builder.h
@@ -31,8 +31,12 @@
 
 G_BEGIN_DECLS
 
+PhotosQuery  *photos_query_builder_count_favorites_query (void);
+
 PhotosQuery  *photos_query_builder_count_query         (void);
 
+PhotosQuery  *photos_query_builder_global_favorites_query (void);
+
 PhotosQuery  *photos_query_builder_global_query        (void);
 
 PhotosQuery  *photos_query_builder_single_query        (gint flags, const gchar *resource);
diff --git a/src/photos-query.h b/src/photos-query.h
index 1aac9a5..5d21452 100644
--- a/src/photos-query.h
+++ b/src/photos-query.h
@@ -52,7 +52,8 @@ typedef enum
 typedef enum
 {
   PHOTOS_QUERY_FLAGS_NONE = 0,
-  PHOTOS_QUERY_FLAGS_UNFILTERED = 1 << 0
+  PHOTOS_QUERY_FLAGS_UNFILTERED = 1 << 0,
+  PHOTOS_QUERY_FLAGS_FAVORITES = 1 << 1
 } PhotosQueryFlags;
 
 typedef struct _PhotosQuery PhotosQuery;