[tracker] Revert "Always guarantee metadata, remove --enable-guarantee-metadata option"

[Martyn James Russell <mr src gnome org>]

commit ecb703e4e21d3240c467b6f45fbce3a959a751ea
Author: Debarshi Ray <debarshir gnome org>
Date:   Thu Nov 20 14:59:41 2014 +0100

    Revert "Always guarantee metadata, remove --enable-guarantee-metadata option"
    
    This reverts commit 898ac3ca17afa5d9fb382656e7e4ba4ff4b6ef39.
    
    Conflicts:
        tests/libtracker-extract/tracker-guarantee-test.c
    
    https://bugzilla.gnome.org/show_bug.cgi?id=733536

 configure.ac                                      |   19 ++++++++++++++++++
 src/libtracker-extract/tracker-guarantee.c        |   22 +++++++++++++++++++++
 tests/libtracker-extract/tracker-guarantee-test.c |    8 +++++++
 3 files changed, 49 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index aa37dc9..aef2e7e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2545,6 +2545,24 @@ fi
 
 AM_CONDITIONAL(HAVE_TOTEM_PL_PARSER, test "x$have_playlist" = "xyes")
 
+#####################################################################
+# Check for tracker-extract: Guarantee existence of certain metadata
+#####################################################################
+
+# Currently guarantees (for extraction):
+# - nie:title for music and video files
+# - nie:contentCreated for music, video and image files
+
+AC_ARG_ENABLE(guarantee-metadata,
+              AS_HELP_STRING([--enable-guarantee-metadata],
+                             [enable guaranteed existence of some metadata, e.g. nie:title from files 
[[default=no]]]),
+              [enable_guarantee_metadata=$enableval],
+              [enable_guarantee_metadata=no])
+
+if test "x$enable_guarantee_metadata" != "xno"; then
+  AC_DEFINE(GUARANTEE_METADATA, 1, [Guarantee existence of some metadata])
+fi
+
 ####################################################################
 # Check if we should use initctl or sysvinit
 ####################################################################
@@ -2823,6 +2841,7 @@ Frameworks / Options:
         Support GNOME's Nautilus                $have_tracker_nautilus_extension 
($tracker_nautilus_extension_install_dir)
        Support Maemo                           $enable_maemo
        Support libmeegotouch                   $have_meegotouch
+       Support Guaranteed Metadata             $enable_guarantee_metadata (e.g. guess nie:title from files)
 
 "
 
diff --git a/src/libtracker-extract/tracker-guarantee.c b/src/libtracker-extract/tracker-guarantee.c
index 077342d..d7409e5 100644
--- a/src/libtracker-extract/tracker-guarantee.c
+++ b/src/libtracker-extract/tracker-guarantee.c
@@ -28,6 +28,8 @@
 
 #include "tracker-guarantee.h"
 
+#ifdef GUARANTEE_METADATA
+
 static gchar *
 get_title_from_file (const gchar *uri)
 {
@@ -66,6 +68,8 @@ get_date_from_file_mtime (const gchar *uri)
        return date;
 }
 
+#endif /* GUARANTEE_METADATA */
+
 /**
  * tracker_guarantee_title_from_file:
  * @metadata: the metadata object to insert the data into
@@ -94,6 +98,7 @@ tracker_guarantee_title_from_file (TrackerSparqlBuilder  *metadata,
                                    const gchar           *uri,
                                    gchar                **p_new_value)
 {
+#ifdef GUARANTEE_METADATA
        g_return_val_if_fail (metadata != NULL, FALSE);
        g_return_val_if_fail (key != NULL, FALSE);
        g_return_val_if_fail (uri != NULL, FALSE);
@@ -118,6 +123,16 @@ tracker_guarantee_title_from_file (TrackerSparqlBuilder  *metadata,
                        g_free (value);
                }
        }
+#else  /* GUARANTEE_METADATA */
+       if (current_value && *current_value != '\0') {
+               tracker_sparql_builder_predicate (metadata, key);
+               tracker_sparql_builder_object_unvalidated (metadata, current_value);
+
+               if (p_new_value != NULL) {
+                       *p_new_value = g_strdup (current_value);
+               }
+       }
+#endif /* GUARANTEE_METADATA */
 
        return TRUE;
 }
@@ -146,6 +161,7 @@ tracker_guarantee_date_from_file_mtime (TrackerSparqlBuilder *metadata,
                                         const gchar          *current_value,
                                         const gchar          *uri)
 {
+#ifdef GUARANTEE_METADATA
        g_return_val_if_fail (metadata != NULL, FALSE);
        g_return_val_if_fail (key != NULL, FALSE);
        g_return_val_if_fail (uri != NULL, FALSE);
@@ -161,6 +177,12 @@ tracker_guarantee_date_from_file_mtime (TrackerSparqlBuilder *metadata,
                tracker_sparql_builder_object_unvalidated (metadata, value);
                g_free (value);
        }
+#else  /* GUARANTEE_METADATA */
+       if (current_value && *current_value != '\0') {
+               tracker_sparql_builder_predicate (metadata, key);
+               tracker_sparql_builder_object_unvalidated (metadata, current_value);
+       }
+#endif /* GUARANTEE_METADATA */
 
        return TRUE;
 }
diff --git a/tests/libtracker-extract/tracker-guarantee-test.c 
b/tests/libtracker-extract/tracker-guarantee-test.c
index 00fa089..3495c55 100644
--- a/tests/libtracker-extract/tracker-guarantee-test.c
+++ b/tests/libtracker-extract/tracker-guarantee-test.c
@@ -35,18 +35,26 @@ typedef struct {
 
 TestInfo title_tests [] = {
        { "normal-extraction", "file:///a/b/a_video_with_metadata.avi", "extracted title", "extracted title" 
},
+
+#ifdef GUARANTEE_METADATA
        { "empty-extraction", "file:///a/b/a_video_with_no_metadata.avi", NULL, "a video with no metadata" },
        { "underscore-separators", "file:///a/b/a_video_with_no_metadata.avi", "", "a video with no metadata" 
},
        { "dot-separators", "file:///a/b/a.video.with.no.metadata.avi", NULL, "a.video.with.no.metadata" },
        { "no-extension", "file:///a/b/a video without extension", NULL, "a video without extension" },
        { "hidden-files", "file:///a/b/.hidden_file", NULL, "hidden file" },
+#endif
+
        { NULL, NULL, NULL }
 };
 
 TestInfo date_tests [] = {
        { "date-normal", "file:///does/not/matter/here", NULL, "2011-10-10T12:13:14Z0300" },
+
+#ifdef GUARANTEE_METADATA
        { "date-is-null", NULL, NULL, NULL },
        { "date-is-empty-string", NULL, NULL, NULL },
+#endif
+
        { NULL, NULL, NULL }
 };