[charts] Clean up how they're displayed

vrobbler/apps/scrobbles/views.py

@@ -135,9 +135,9 @@ class ChartContextMixin:
             return context
 
         media_type_map = {
-            "music.Artist": "artist",
-            "music.Album": "album",
-            "music.Track": "track",
+            "music.artist": "artist",
+            "music.album": "album",
+            "music.track": "track",
             "videos.video": "video",
             "videos.series": "tv_series",
             "podcasts.podcast": "podcast",
@@ -151,10 +151,17 @@ class ChartContextMixin:
         media_type = media_type_map.get(model_label)
 
         if media_type:
-            context["charts"] = ChartRecord.objects.filter(
+            charts_qs = ChartRecord.objects.filter(
                 **{media_type: obj}, rank__in=[1, 2, 3]
             ).exclude(day__isnull=False)
 
+            from collections import OrderedDict
+
+            grouped = OrderedDict()
+            for chart in charts_qs:
+                grouped.setdefault(chart.period_type, []).append(chart)
+            context["charts"] = grouped
+
         return context