[tracker/wip/carlosg/batches-and-resources: 3/7] libtracker-sparql: Add tracker_resource_get_property_overwrite()

[Carlos Garnacho <carlosg src gnome org>]

commit d42a31b77ff42e01553e29a7c4210c7e483f5828
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sun Nov 22 12:07:59 2020 +0100

    libtracker-sparql: Add tracker_resource_get_property_overwrite()
    
    This function returns whether the given property would be overwritten
    entirely in the issued SPARQL. We need this to be able to fully introspect
    a TrackerResource in a way that we can bypass SPARQL.

 .../libtracker-sparql-sections.txt                  |  1 +
 src/libtracker-sparql/tracker-resource.c            | 21 +++++++++++++++++++++
 src/libtracker-sparql/tracker-resource.h            |  3 +++
 3 files changed, 25 insertions(+)
---
diff --git a/docs/reference/libtracker-sparql/libtracker-sparql-sections.txt 
b/docs/reference/libtracker-sparql/libtracker-sparql-sections.txt
index 0054c0f58..495859130 100644
--- a/docs/reference/libtracker-sparql/libtracker-sparql-sections.txt
+++ b/docs/reference/libtracker-sparql/libtracker-sparql-sections.txt
@@ -47,6 +47,7 @@ tracker_resource_get_first_uri
 tracker_resource_get_identifier
 tracker_resource_get_values
 tracker_resource_get_properties
+tracker_resource_get_property_overwrite
 tracker_resource_identifier_compare_func
 tracker_resource_print_sparql_update
 tracker_resource_print_turtle
diff --git a/src/libtracker-sparql/tracker-resource.c b/src/libtracker-sparql/tracker-resource.c
index 4c4c0fc42..480f0d9ed 100644
--- a/src/libtracker-sparql/tracker-resource.c
+++ b/src/libtracker-sparql/tracker-resource.c
@@ -2010,3 +2010,24 @@ tracker_resource_deserialize (GVariant *variant)
 
        return resource;
 }
+
+/**
+ * tracker_resource_get_property_overwrite:
+ * @resource: a #TrackerResource
+ * @property_uri: a string identifying the property to query
+ *
+ * Returns whether the prior values for this property would be deleted
+ * in the SPARQL issued by @resource.
+ *
+ * Returns: #TRUE if the property would be overwritten
+ *
+ * Since: 3.1
+ **/
+gboolean
+tracker_resource_get_property_overwrite (TrackerResource *resource,
+                                         const gchar     *property_uri)
+{
+       TrackerResourcePrivate *priv = GET_PRIVATE (resource);
+
+       return g_hash_table_contains (priv->overwrite, property_uri);
+}
diff --git a/src/libtracker-sparql/tracker-resource.h b/src/libtracker-sparql/tracker-resource.h
index 171834449..f975c757c 100644
--- a/src/libtracker-sparql/tracker-resource.h
+++ b/src/libtracker-sparql/tracker-resource.h
@@ -114,6 +114,9 @@ GVariant * tracker_resource_serialize (TrackerResource *resource);
 TRACKER_AVAILABLE_IN_ALL
 TrackerResource * tracker_resource_deserialize (GVariant *variant);
 
+TRACKER_AVAILABLE_IN_3_1
+gboolean tracker_resource_get_property_overwrite (TrackerResource *resource, const gchar *property_uri);
+
 G_END_DECLS
 
 #endif /* __LIBTRACKER_RESOURCE_H__ */