[grilo-plugins/wip/carlosg/tracker3: 9/9] tracker3: Listen to notifications from tracker-miner-fs

[Carlos Garnacho <carlosg src gnome org>]

commit 99750d3da40fb68a3408e97232cebf68e1c42975
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sun Jun 14 19:47:30 2020 +0200

    tracker3: Listen to notifications from tracker-miner-fs
    
    This should be added explicitly, just in case the connection is local
    (and thus does not listen to events from tracker-miner-fs bus name by
    default).

 src/tracker3/grl-tracker-source-notif.c | 9 +++++++++
 src/tracker3/grl-tracker-utils.c        | 8 ++++++++
 src/tracker3/grl-tracker.c              | 3 ++-
 3 files changed, 19 insertions(+), 1 deletion(-)
---
diff --git a/src/tracker3/grl-tracker-source-notif.c b/src/tracker3/grl-tracker-source-notif.c
index b025b7c7..c84dc82f 100644
--- a/src/tracker3/grl-tracker-source-notif.c
+++ b/src/tracker3/grl-tracker-source-notif.c
@@ -174,10 +174,19 @@ static void
 grl_tracker_source_notify_constructed (GObject *object)
 {
   GrlTrackerSourceNotify *self = GRL_TRACKER_SOURCE_NOTIFY (object);
+  GDBusConnection *bus_connection;
 
   self->notifier =
     tracker_sparql_connection_create_notifier (self->connection,
                                                TRACKER_NOTIFIER_FLAG_QUERY_URN);
+
+  bus_connection = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, NULL);
+  tracker_notifier_signal_subscribe (self->notifier,
+                                     bus_connection,
+                                     "org.freedesktop.Tracker3.Miner.Files",
+                                     NULL);
+  g_object_unref (bus_connection);
+
   self->events_signal_id =
     g_signal_connect_swapped (self->notifier, "events",
                               G_CALLBACK (notifier_event_cb), object);
diff --git a/src/tracker3/grl-tracker-utils.c b/src/tracker3/grl-tracker-utils.c
index a90e79bf..ef9badb5 100644
--- a/src/tracker3/grl-tracker-utils.c
+++ b/src/tracker3/grl-tracker-utils.c
@@ -543,6 +543,14 @@ grl_tracker_build_resource_from_media (GrlMedia *media, GList *keys)
     } else if (l->data == GRLKEYID_TO_POINTER (GRL_METADATA_KEY_EPISODE)) {
       tracker_resource_set_int (resource, "nmm:episodeNumber",
                                 grl_media_get_episode (media));
+    } else if (l->data == GRLKEYID_TO_POINTER (GRL_METADATA_KEY_CREATION_DATE)) {
+      GDateTime *creation;
+      gchar *date;
+
+      creation = grl_media_get_creation_date (media);
+      date = g_date_time_format_iso8601 (creation);
+      tracker_resource_set_string (resource, "nie:contentCreated", date);
+      g_free (date);
     } else if (l->data == GRLKEYID_TO_POINTER (GRL_METADATA_KEY_ALBUM)) {
       TrackerResource *album;
       album = ensure_resource_for_property (resource, "nmm:musicAlbum", FALSE);
diff --git a/src/tracker3/grl-tracker.c b/src/tracker3/grl-tracker.c
index 3f20d4f4..059463ca 100644
--- a/src/tracker3/grl-tracker.c
+++ b/src/tracker3/grl-tracker.c
@@ -125,7 +125,7 @@ grl_tracker3_plugin_init (GrlRegistry *registry,
   if (grl_tracker_store_path)
     store = g_file_new_for_path (grl_tracker_store_path);
   ontology = tracker_sparql_get_ontology_nepomuk ();
-  tracker_sparql_connection_new_async (TRACKER_SPARQL_CONNECTION_FLAGS_NONE,
+  tracker_sparql_connection_new_async (TRACKER_SPARQL_CONNECTION_FLAGS_READONLY,
                                        store,
                                        ontology,
                                        grl_tracker_plugin_init_cancel,
@@ -141,6 +141,7 @@ grl_tracker3_plugin_deinit (GrlPlugin *plugin)
 {
   g_cancellable_cancel (grl_tracker_plugin_init_cancel);
   g_clear_object (&grl_tracker_plugin_init_cancel);
+  g_clear_object (&grl_tracker_connection);
 }
 
 static void