[tracker-miners/wip/carlosg/extraction-fixes: 1/3] tracker-extract-gstreamer: Add helper function to create file resource

[Carlos Garnacho <carlosg src gnome org>]

commit e6a83a07c6fa6cbe872640d45ed763601c369e6f
Author: Carlos Garnacho <carlosg gnome org>
Date:   Wed Sep 30 18:10:52 2020 +0200

    tracker-extract-gstreamer: Add helper function to create file resource
    
    This is already useful, and will be used further.

 src/tracker-extract/tracker-extract-gstreamer.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)
---
diff --git a/src/tracker-extract/tracker-extract-gstreamer.c b/src/tracker-extract/tracker-extract-gstreamer.c
index 6db34f71c..a05da120c 100644
--- a/src/tracker-extract/tracker-extract-gstreamer.c
+++ b/src/tracker-extract/tracker-extract-gstreamer.c
@@ -615,6 +615,21 @@ extractor_get_equipment (MetadataExtractor    *extractor,
        return equipment;
 }
 
+static TrackerResource *
+ensure_file_resource (TrackerResource *resource,
+                      const gchar     *file_url)
+{
+       TrackerResource *file_resource;
+
+       file_resource = tracker_resource_get_first_relation (resource, "nie:isStoredAs");
+       if (!file_resource) {
+               file_resource = tracker_resource_new (file_url);
+               tracker_resource_set_take_relation (resource, "nie:isStoredAs", file_resource);
+       }
+
+       return file_resource;
+}
+
 static void
 extractor_apply_audio_metadata (MetadataExtractor     *extractor,
                                 GstTagList            *tag_list,
@@ -948,7 +963,7 @@ extract_metadata (MetadataExtractor      *extractor,
                        if (extractor->toc && g_list_length (extractor->toc->entry_list) > 1) {
                                TrackerResource *file_resource;
 
-                               file_resource = tracker_resource_new (file_url);
+                               file_resource = ensure_file_resource (resource, file_url);
 
                                for (node = extractor->toc->entry_list; node; node = node->next) {
                                        TrackerResource *track;
@@ -965,8 +980,6 @@ extract_metadata (MetadataExtractor      *extractor,
                                        tracker_resource_set_relation (track, "nie:isStoredAs", 
file_resource);
                                        tracker_resource_add_take_relation (file_resource, 
"nie:interpretedAs", track);
                                }
-
-                               g_object_unref (file_resource);
                        } else {
                                extractor_apply_audio_metadata (extractor,
                                                                extractor->tagcache,
@@ -1004,8 +1017,7 @@ extract_metadata (MetadataExtractor      *extractor,
 
                        tracker_resource_set_string (hash_resource, "nfo:hashAlgorithm", "gibest");
 
-                       file_resource = tracker_resource_new (file_url);
-                       tracker_resource_add_take_relation (resource, "nie:isStoredAs", file_resource);
+                       file_resource = ensure_file_resource (resource, file_url);
 
                        tracker_resource_set_relation (file_resource, "nfo:hasHash", hash_resource);