Add game management features: create MusikGame model, implement game creation and detail views, and update group detail template

game/views.py

@@ -1,3 +1,5 @@
+import random
+
 from django.contrib.auth.mixins import LoginRequiredMixin
 from django.db.models import Count, Q
 from django.http import JsonResponse
@@ -88,3 +90,50 @@ class GroupRemoveMusicView(OwnerFilterMixin, SingleObjectMixin, View):
         group = music.group
         music.delete()
         return redirect(group)
+
+
+class GameCreateView(LoginRequiredMixin, CreateView):
+    model = models.MusikGame
+    form_class = forms.MusikGameForm
+
+    def get_form_kwargs(self):
+        kwargs = super().get_form_kwargs()
+        kwargs["group"] = self.kwargs["pk"]
+        return kwargs
+
+    def get_context_data(self, **kwargs):
+        data = super().get_context_data(**kwargs)
+        data["group"] = models.Group.objects.filter(owner=self.request.user).get(
+            pk=self.kwargs["pk"]
+        )
+        return data
+
+    def form_valid(self, form):
+        group = models.Group.objects.get(pk=self.kwargs["pk"])
+        form.instance.group = group
+        res = super().form_valid(form)
+        players = []
+        musics = []
+        for player in form.instance.players.all():
+            players += 2 * [player]
+            musics += random.sample(
+                list(
+                    player.musicvideo_set.filter(group=group, blacklisted=False).all()
+                ),
+                form.instance.n,
+            )
+
+        pm_list = list(zip(players, musics))
+        random.shuffle(pm_list)
+        for (player, music), order in zip(pm_list, range(len(pm_list))):
+            models.MusicGameOrder.objects.create(
+                game=form.instance, player=player, music_video=music, order=order
+            )
+        return res
+
+
+class GameDetailView(LoginRequiredMixin, DetailView):
+    model = models.MusikGame
+
+    def get_queryset(self):
+        return super().get_queryset().filter(group__owner=self.request.user)