[gnome-music/wip/mschraal/tageditor: 4/21] utils: Add getters for media track number and album disc number

[Marinus Schraal <mschraal src gnome org>]

commit 9e0e941e38ccc0550a58b88c2fbf6a7413ec88d3
Author: Sumaid Syed <sumaidsyed gmail com>
Date:   Sun Aug 4 22:05:49 2019 +0530

    utils: Add getters for media track number and album disc number
    
    Based on the patches by Jean Felder
    
    https://gitlab.gnome.org/GNOME/gnome-music/issues/293

 gnomemusic/utils.py | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)
---
diff --git a/gnomemusic/utils.py b/gnomemusic/utils.py
index 76310cb6..c6a59ec8 100644
--- a/gnomemusic/utils.py
+++ b/gnomemusic/utils.py
@@ -117,11 +117,37 @@ def get_media_year(item):
     date = item.get_creation_date()
 
     if not date:
-        return "----"
+        return ""
 
     return str(date.get_year())
 
 
+def get_album_disc_nr(item):
+    """Returns the album song number associated with the media item
+
+    :param Grl.Media item: song
+    :return: The album disc number
+    :rtype: string
+    """
+    track_number = item.get_album_disc_number()
+    if track_number == 0:
+        track_number = ""
+    return str(track_number)
+
+
+def get_media_track_nr(item):
+    """Returns the track number of the media item.
+
+    :param Grl.Media item: song
+    :return: The song track number
+    :rtype: string
+    """
+    track_number = item.get_track_number()
+    if track_number == 0:
+        return ""
+    return str(track_number)
+
+
 def seconds_to_string(duration):
     """Convert a time in seconds to a mm:ss string