add place csv export

polylan_submitter/place/api.py

@@ -1,5 +1,7 @@
+import csv
 import struct
 
+from django.db.models import Count
 from django.http import HttpRequest, HttpResponse
 from ninja import Router
 from ninja.decorators import decorate_view
@@ -9,7 +11,7 @@ from games.decorators import require_game_enabled
 
 from .canvas import read_canvas
 from .gif import build_evolution_gif
-from .models import PlaceSettings
+from .models import PixelPlacement, PlaceSettings
 
 router = Router()
 
@@ -37,3 +39,27 @@ def canvas(request: HttpRequest, event_path: str):
 def evolution_gif(request: HttpRequest, event_path: str):
     """Admin-only: replays the full placement history as an animated GIF."""
     return HttpResponse(build_evolution_gif(request.event), content_type="image/gif")
+
+
+@router.get(f"{PREFIX}/placements.csv", auth=django_auth_is_staff)
+@decorate_view(require_game_enabled(path="place"))
+def placements_csv(request: HttpRequest, event_path: str):
+    """Admin-only: pixel placement count per player, most active first."""
+    rows = (
+        PixelPlacement.objects.filter(event=request.event)
+        .values("player__username")
+        .annotate(count=Count("id"))
+        .order_by("-count", "player__username")
+    )
+    # text/plain so browsers render it inline - most force-download text/csv
+    response = HttpResponse(content_type="text/plain; charset=utf-8")
+    writer = csv.writer(response)
+    writer.writerow(["username", "placements"])
+    for row in rows:
+        writer.writerow(
+            [
+                row["player__username"],
+                row["count"],
+            ]
+        )
+    return response