[tracker/wip/carlosg/tracker-3.0-api-breaks: 10/56] libtracker-sparql: Drop TRACKER_NOTIFIER_FLAG_NOTIFY_UNEXTRACTED

[Carlos Garnacho <carlosg src gnome org>]

commit de16609ce0aa70437767ef032efa28174628d5bd
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Dec 20 13:07:53 2019 +0100

    libtracker-sparql: Drop TRACKER_NOTIFIER_FLAG_NOTIFY_UNEXTRACTED
    
    The nie:dataSource trick we employ here is highly dependent on
    tracker-miners implementation, and the whole concept of "unextracted".
    Drop this flag and make it happen by default, the number of updates
    we get will be dependent on the service we listen to.

 .../reference/libtracker-sparql/migrating-2to3.xml |  7 ++++
 src/libtracker-sparql/tracker-notifier.c           | 47 +---------------------
 src/libtracker-sparql/tracker-notifier.h           |  5 ---
 3 files changed, 9 insertions(+), 50 deletions(-)
---
diff --git a/docs/reference/libtracker-sparql/migrating-2to3.xml 
b/docs/reference/libtracker-sparql/migrating-2to3.xml
index beaa60433..8f12adec6 100644
--- a/docs/reference/libtracker-sparql/migrating-2to3.xml
+++ b/docs/reference/libtracker-sparql/migrating-2to3.xml
@@ -113,4 +113,11 @@ ORDER BY DESC ?count
       But of course, other more detailed statistics may be obtained.
     </para>
   </section>
+  <section>
+    <title>No TRACKER_NOTIFIER_FLAG_NOTIFY_UNEXTRACTED</title>
+    <para>
+      There is no replacement. If metadata about resources is added in several steps.
+      TrackerNotifier will inform of each.
+    </para>
+  </section>
 </chapter>
diff --git a/src/libtracker-sparql/tracker-notifier.c b/src/libtracker-sparql/tracker-notifier.c
index 5a0696bb7..d41b4e705 100644
--- a/src/libtracker-sparql/tracker-notifier.c
+++ b/src/libtracker-sparql/tracker-notifier.c
@@ -30,18 +30,6 @@
  * events can be listened for by connecting to the #TrackerNotifier::events
  * signal. This object was added in Tracker 1.12.
  *
- * #TrackerNotifier by default coalesces events so the user is only
- * notified of changes after all metadata is extracted and inserted
- * in the database, so the user is guaranteed that all relevant data
- * will be available at the time of notification. If this is not desired,
- * or when dealing with data not dealt with by tracker-extract, the
- * %TRACKER_NOTIFIER_FLAG_NOTIFY_UNEXTRACTED flag can be passed.
- *
- * If the %TRACKER_NOTIFIER_FLAG_NOTIFY_UNEXTRACTED flag is passed,
- * created/updated elements may be notified in two steps, first a
- * CREATED/UPDATED event will be emitted, and then a second UPDATED
- * event might appear after further metadata is extracted.
- *
  * #TrackerNotifier is tracker:id centric, the ID can be
  * obtained from every event through tracker_notifier_event_get_id().
  * The expected way to retrieving metadata is a query of the form:
@@ -111,7 +99,6 @@ struct _TrackerNotifierEventCache {
 
 struct _TrackerNotifierEvent {
        gint8 type;
-       guint delayed : 1;
        gint64 id;
        const gchar *rdf_type; /* Belongs to cache */
        gchar *urn;
@@ -296,9 +283,6 @@ handle_deletes (TrackerNotifier           *notifier,
                 GVariantIter              *iter)
 {
        gint32 graph, subject, predicate, object;
-       TrackerNotifierPrivate *priv;
-
-       priv = tracker_notifier_get_instance_private (notifier);
 
        while (g_variant_iter_loop (iter, "(iiii)",
                                    &graph, &subject, &predicate, &object)) {
@@ -307,21 +291,7 @@ handle_deletes (TrackerNotifier           *notifier,
                event = tracker_notifier_event_cache_get_event (cache, subject);
 
                if (tracker_notifier_id_matches (notifier, predicate, "rdf:type")) {
-                       if (event->delayed &&
-                           event->type == TRACKER_NOTIFIER_EVENT_CREATE) {
-                               /* This rdf:type was created and dropped,
-                                * restore type to its original unset state so
-                                * it is ignored and freed afterwards.
-                                */
-                               event->type = -1;
-                       } else {
-                               event->type = TRACKER_NOTIFIER_EVENT_DELETE;
-                       }
-               } else if (event->type != TRACKER_NOTIFIER_EVENT_DELETE &&
-                          (priv->flags & TRACKER_NOTIFIER_FLAG_NOTIFY_UNEXTRACTED) == 0 &&
-                          tracker_notifier_id_matches (notifier, predicate, "nie:dataSource") &&
-                          tracker_notifier_id_matches (notifier, object, "tracker:extractor-data-source")) {
-                       event->delayed = TRUE;
+                       event->type = TRACKER_NOTIFIER_EVENT_DELETE;
                } else if (event->type < 0) {
                        event->type = TRACKER_NOTIFIER_EVENT_UPDATE;
                }
@@ -334,9 +304,6 @@ handle_updates (TrackerNotifier           *notifier,
                 GVariantIter              *iter)
 {
        gint32 graph, subject, predicate, object;
-       TrackerNotifierPrivate *priv;
-
-       priv = tracker_notifier_get_instance_private (notifier);
 
        while (g_variant_iter_loop (iter, "(iiii)",
                                    &graph, &subject, &predicate, &object)) {
@@ -346,14 +313,6 @@ handle_updates (TrackerNotifier           *notifier,
 
                if (tracker_notifier_id_matches (notifier, predicate, "rdf:type")) {
                        event->type = TRACKER_NOTIFIER_EVENT_CREATE;
-
-                       if ((priv->flags & TRACKER_NOTIFIER_FLAG_NOTIFY_UNEXTRACTED) == 0)
-                               event->delayed = TRUE;
-               } else if (tracker_notifier_id_matches (notifier, predicate, "nie:dataSource") &&
-                          tracker_notifier_id_matches (notifier, object, "tracker:extractor-data-source")) {
-                       if (event->type < 0)
-                               event->type = TRACKER_NOTIFIER_EVENT_UPDATE;
-                       event->delayed = FALSE;
                } else if (event->type < 0) {
                        event->type = TRACKER_NOTIFIER_EVENT_UPDATE;
                }
@@ -378,7 +337,7 @@ tracker_notifier_event_cache_flush_events (TrackerNotifierEventCache *cache)
                if (event->type == -1) {
                        /* This event turned out a NO-OP, just remove it */
                        g_sequence_remove (iter);
-               } else if (!event->delayed) {
+               } else {
                        g_ptr_array_add (events, tracker_notifier_event_ref (event));
                        g_sequence_remove (iter);
                }
@@ -701,8 +660,6 @@ tracker_notifier_initable_init (GInitable     *initable,
                return FALSE;
 
        tracker_notifier_cache_id (notifier, "rdf:type");
-       tracker_notifier_cache_id (notifier, "nie:dataSource");
-       tracker_notifier_cache_id (notifier, "tracker:extractor-data-source");
 
        priv->dbus_connection = tracker_sparql_connection_get_dbus_connection ();
        if (!priv->dbus_connection)
diff --git a/src/libtracker-sparql/tracker-notifier.h b/src/libtracker-sparql/tracker-notifier.h
index f9519f369..3009cef65 100644
--- a/src/libtracker-sparql/tracker-notifier.h
+++ b/src/libtracker-sparql/tracker-notifier.h
@@ -47,10 +47,6 @@ struct _TrackerNotifierClass {
  * @TRACKER_NOTIFIER_FLAG_NONE: No flags
  * @TRACKER_NOTIFIER_FLAG_QUERY_URN: Query URN of notified elements
  * @TRACKER_NOTIFIER_FLAG_QUERY_LOCATION: Query location of notified elements
- * @TRACKER_NOTIFIER_FLAG_NOTIFY_UNEXTRACTED: Added/updated Elements are
- *   notified in 2 steps (a CREATE/UPDATE event after the file is first
- *   known, and an UPDATE event after metadata is extracted). The default
- *   #TrackerNotifier behavior coalesces those events in one.
  *
  * Flags affecting #TrackerNotifier behavior.
  */
@@ -58,7 +54,6 @@ typedef enum {
        TRACKER_NOTIFIER_FLAG_NONE               = 0,
        TRACKER_NOTIFIER_FLAG_QUERY_URN          = 1 << 1,
        TRACKER_NOTIFIER_FLAG_QUERY_LOCATION     = 1 << 2,
-       TRACKER_NOTIFIER_FLAG_NOTIFY_UNEXTRACTED = 1 << 3,
 } TrackerNotifierFlags;
 
 /**