first backend frontend split

with docker compose file
nextjs something something
also includes migrations

backend/playlist/utils.py

@@ -0,0 +1,68 @@
+from .models import Track, Vote, Album, Artist
+from random import choice, seed
+
+def from_json(cls, json):
+    try:
+        return cls.objects.get(pk=json["id"])
+    except cls.DoesNotExist:
+        keys = [f.name for f in cls._meta.get_fields()]
+        subset = {key:json[key] for key in set(keys) & set(json.keys())}
+        return cls.objects.create(**subset)
+
+def get_unvoted(user):
+    """Gets next voting track for user. Returns a pair with track and flag if this was a skipped track"""
+    votes = set(Vote.objects.filter(user=user).values_list('track_id', flat=True))
+    tracks = set(Track.objects.filter(banter_done=True).values_list('pk', flat=True))
+    seed(user.username)
+    try:
+        queue = list(tracks - votes)
+        skipped = False
+        if not queue:
+            skipped = True
+            queue = list(Vote.objects.filter(user=user).filter(skipped=True).values_list('track_id', flat=True))
+        random_track = choice(queue)
+        choice 
+        return (Track.objects.get(pk=random_track), skipped)
+    except IndexError:
+        return (None, False)
+    
+def get_unvoted_count(user):
+    votes = set(Vote.objects.filter(user=user).values_list('track_id', flat=True))
+    tracks = set(Track.objects.filter(banter_done=True).values_list('pk', flat=True))
+    try:
+        queue = list(tracks - votes)
+        skipped = list(Vote.objects.filter(user=user).filter(skipped=True).values_list('track_id', flat=True))
+        return (len(queue), len(skipped))
+    except IndexError:
+        return (0, 0)
+    
+
+def track_from_json(json):
+    """Creates the track, album and artist from spotify response."""
+    # Album artists
+    album_artists = []
+    for artist in json["album"]["artists"]:
+        album_artists.append(from_json(Artist, artist))
+    del json["album"]["artists"]
+
+    # Album
+    album = from_json(Album, json["album"])
+    album.image_url = json["album"]["images"][0]["url"]
+    album.save()
+    del json["album"]
+    for artist in album_artists:
+        album.artists.add(artist)
+
+    # Track artists
+    track_artists = []
+    for artist in json["artists"]:
+        track_artists.append(from_json(Artist, artist))
+    del json["artists"]
+
+    # Track
+    track = from_json(Track, json)
+    for artist in track_artists:
+        track.artists.add(artist)
+    track.album = album
+    track.save()
+    return track