[gnome-music/wip/jfelder/mpris-cleanup: 14/28] mpris: Use song favourite status to describe userRating

[Jean Felder <jfelder src gnome org>]

commit 0306d817556eb1617a6d9f99bc1f67157031d8df
Author: Jean Felder <jfelder src gnome org>
Date:   Tue Sep 4 18:32:35 2018 +0200

    mpris: Use song favourite status to describe userRating
    
    Music does not handle user ratings but the favourite status can be
    used instead.
    Set userRating to 1.0 is song is favourite, 0.0 otherwise.

 gnomemusic/mpris.py | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)
---
diff --git a/gnomemusic/mpris.py b/gnomemusic/mpris.py
index 917b584f..427ed9fb 100644
--- a/gnomemusic/mpris.py
+++ b/gnomemusic/mpris.py
@@ -327,12 +327,8 @@ class MPRIS(DBusInterface):
         except:
             pass
 
-        try:
-            userRating = media.get_rating()
-            assert userRating is not None
-            metadata['xesam:userRating'] = GLib.Variant('d', userRating)
-        except:
-            pass
+        user_rating = 1.0 if media.get_favourite() else 0.0
+        metadata['xesam:userRating'] = GLib.Variant('d', user_rating)
 
         try:
             title = utils.get_media_title(media)