[gnome-music/wip/carlosg/tracker3: 1/2] coresong: Use Grilo for all song metadata updates

[Carlos Garnacho <carlosg src gnome org>]

commit f37effd24c698d497e9781f9e1446b932f246421
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sun Jun 14 18:34:24 2020 +0200

    coresong: Use Grilo for all song metadata updates
    
    All properties that can be written back to the file will be handled
    through grilo (which proxies tracker-writeback).

 gnomemusic/coresong.py | 121 ++++++++++++++++++-------------------------------
 1 file changed, 44 insertions(+), 77 deletions(-)
---
diff --git a/gnomemusic/coresong.py b/gnomemusic/coresong.py
index b2477a8d..56b23470 100644
--- a/gnomemusic/coresong.py
+++ b/gnomemusic/coresong.py
@@ -161,114 +161,81 @@ class CoreSong(GObject.GObject):
 
         self._coregrilo.get_chromaprint(self, chromaprint_retrieved)
 
-    def _update_from_tracker(self, tags):
-        """Update tags with Tracker requests.
-
-        The tags need to be inserted in a certain order: For example, a
-        musicbrainz release group identifier is associated with an album
-        resource. So, it needs to be updated after the album.
-        The following order is respected:
-        1. resources of a song (mb-recording-id and mb-track-id)
-        2. artist resource
-        3. resources of an artist (mb-artist-id)
-        4. album and albumdisc (with the disc number tag) resources
-        5. resources of an album (album artist, mb-release-id and
-           mb-release-group-id)
-
-        :param List tags: list of updated
+    def update_tags(self, tags):
+        """Update tags of a song.
+
+        The properties of a song can be updated with Grilo writeback
+        support.
+
+        :param dict tags: New tag values
         """
-        changed_tags = deque()
+        def _writeback_cb():
+            return
+
+        writeback_keys = []
+        if tags["title"] != self.props.title:
+            self.props.media.set_title(tags["title"])
+            writeback_keys.append(Grl.METADATA_KEY_TITLE)
+
+        if int(tags["track"]) != self.props.track_number:
+            self.props.media.set_track_number(int(tags["track"]))
+            writeback_keys.append(Grl.METADATA_KEY_TRACK_NUMBER)
+
+        if tags["year"] != utils.get_media_year(self.props.media):
+            date = GLib.DateTime.new_utc(int(tags["year"]), 1, 1, 0, 0, 0)
+            self.props.media.set_creation_date(date)
+            writeback_keys.append(Grl.METADATA_KEY_CREATION_DATE)
 
         mb_recording_id = tags["mb-recording-id"]
         if (mb_recording_id
                 and mb_recording_id != self.props.media.get_mb_recording_id()):
             self.props.media.set_mb_recording_id(tags["mb-recording-id"])
-            changed_tags.append("mb-recording-id")
+            writeback_keys.append(Grl.METADATA_KEY_MB_RECORDING_ID)
 
         if (tags["mb-track-id"]
                 and tags["mb-track-id"] != self.props.media.get_mb_track_id()):
             self.props.media.set_mb_track_id(tags["mb-track-id"])
-            changed_tags.append("mb-track-id")
+            writeback_keys.append(Grl.METADATA_KEY_MB_TRACK_ID)
 
         if tags["artist"] != self.props.media.get_artist():
             self.props.media.set_artist(tags["artist"])
-            changed_tags.append("artist")
+            writeback_keys.append(Grl.METADATA_KEY_ARTIST)
 
         if (tags["mb-artist-id"]
-            and (tags["mb-artist-id"] != self.props.media.get_mb_artist_id()
-                 or "artist" in changed_tags)):
-            if tags["mb-artist-id"] != self.props.media.get_mb_artist_id():
-                self.props.media.set_mb_artist_id(tags["mb-artist-id"])
-            changed_tags.append("mb-artist-id")
+                and tags["mb-artist-id"] !=
+                    self.props.media.get_mb_artist_id()):
+            self.props.media.set_mb_artist_id(tags["mb-artist-id"])
+            writeback_keys.append(Grl.METADATA_KEY_MB_ARTIST_ID)
 
         if tags["album"] != self.props.media.get_album():
             self.props.media.set_album(tags["album"])
-            changed_tags.append("album")
+            writeback_keys.append(Grl.METADATA_KEY_ALBUM)
 
         if int(tags["disc"]) != self.props.media.get_album_disc_number():
             self.props.media.set_album_disc_number(int(tags["disc"]))
-            if "album" not in changed_tags:
-                changed_tags.append("album")
+            writeback_keys.append(Grl.METADATA_KEY_ALBUM_DISC_NUMBER)
 
         if (tags["album-artist"]
-            and (tags["album-artist"] != self.props.media.get_album_artist()
-                 or "album" in changed_tags)):
-            if tags["album-artist"] != self.props.media.get_album_artist():
-                self.props.media.set_album_artist(tags["album-artist"])
-            changed_tags.append("album-artist")
-            if "album" not in changed_tags:
-                changed_tags.appendleft("album")
+                and tags["album-artist"] !=
+                    self.props.media.get_album_artist()):
+            self.props.media.set_album_artist(tags["album-artist"])
+            writeback_keys.append(Grl.METADATA_KEY_ALBUM_ARTIST)
 
         if (tags["mb-release-id"]
-            and (tags["mb-release-id"] != self.props.media.get_mb_release_id()
-                 or "album" in changed_tags)):
-            if tags["mb-release-id"] != self.props.media.get_mb_release_id():
-                self.props.media.set_mb_release_id(tags["mb-release-id"])
-            changed_tags.append("mb-release-id")
+                and tags["mb-release-id"] !=
+                    self.props.media.get_mb_release_id()):
+            self.props.media.set_mb_release_id(tags["mb-release-id"])
+            writeback_keys.append(Grl.METADATA_KEY_MB_RELEASE_ID)
 
         release_group_id = tags["mb-release-group-id"]
         if (release_group_id
-            and (release_group_id != self.props.media.get_mb_release_group_id()
-                 or "album" in changed_tags)):
-            if release_group_id != self.props.media.get_mb_release_group_id():
-                self.props.media.set_mb_release_group_id(release_group_id)
-            changed_tags.append("mb-release-group-id")
-
-        if changed_tags:
-            self._log.debug(
-                "Updating tags from tracker: {}".format(changed_tags))
-            self._coregrilo.writeback_tracker(self.props.media, changed_tags)
-
-    def update_tags(self, tags):
-        """Update tags of a song.
-
-        The properties of a song can be updated with Grilo writeback
-        support. The other ones need to be updated with Tracker
-        requests.
-
-        :param dict tags: New tag values
-        """
-        def _writeback_cb():
-            self._update_from_tracker(tags)
-
-        writeback_keys = []
-        if tags["title"] != self.props.title:
-            self.props.media.set_title(tags["title"])
-            writeback_keys.append(Grl.METADATA_KEY_TITLE)
-
-        if int(tags["track"]) != self.props.track_number:
-            self.props.media.set_track_number(int(tags["track"]))
-            writeback_keys.append(Grl.METADATA_KEY_TRACK_NUMBER)
-
-        if tags["year"] != utils.get_media_year(self.props.media):
-            date = GLib.DateTime.new_utc(int(tags["year"]), 1, 1, 0, 0, 0)
-            self.props.media.set_creation_date(date)
-            writeback_keys.append(Grl.METADATA_KEY_CREATION_DATE)
+                and release_group_id !=
+                    self.props.media.get_mb_release_group_id()):
+            self.props.media.set_mb_release_group_id(release_group_id)
+            writeback_keys.append(Grl.METADATA_KEY_MB_RELEASE_GROUP_ID)
 
         if writeback_keys:
             self._log.debug(
                 "Updating tags of a song: {}".format(writeback_keys))
             self._coregrilo.writeback(
                 self.props.media, writeback_keys, _writeback_cb)
-        else:
-            self._update_from_tracker(tags)