billscroll should now remember user's position across devices

src/apps/billboard/views.py

@@ -4,7 +4,7 @@ from django.shortcuts import redirect, render
 
 from apps.applets.models import Applet, UserApplet
 from apps.applets.utils import applet_context
-from apps.drama.models import GameEvent
+from apps.drama.models import GameEvent, ScrollPosition
 from apps.epic.models import GateSlot, Room, RoomInvite
 
 
@@ -61,9 +61,26 @@ def toggle_billboard_applets(request):
 def room_scroll(request, room_id):
     room = Room.objects.get(id=room_id)
     events = room.events.select_related("actor").all()
+    sp = ScrollPosition.objects.filter(user=request.user, room=room).first()
     return render(request, "apps/billboard/room_scroll.html", {
         "room": room,
         "events": events,
         "viewer": request.user,
+        "scroll_position": sp.position if sp else 0,
         "page_class": "page-billscroll",
     })
+
+
+@login_required(login_url="/")
+def save_scroll_position(request, room_id):
+    if request.method != "POST":
+        from django.http import HttpResponseNotAllowed
+        return HttpResponseNotAllowed(["POST"])
+    room = Room.objects.get(id=room_id)
+    position = int(request.POST.get("position", 0))
+    ScrollPosition.objects.update_or_create(
+        user=request.user, room=room,
+        defaults={"position": position},
+    )
+    from django.http import HttpResponse
+    return HttpResponse(status=204)