Update the react map for some new events.

game/server/controlpoints/routes.py

@@ -1,4 +1,4 @@
-from fastapi import APIRouter, Depends
+from fastapi import APIRouter, Depends, HTTPException, status
 
 from game import Game
 from .models import ControlPointJs
@@ -13,3 +13,16 @@ def list_control_points(game: Game = Depends(GameContext.get)) -> list[ControlPo
     for control_point in game.theater.controlpoints:
         control_points.append(ControlPointJs.for_control_point(control_point))
     return control_points
+
+
+@router.get("/{cp_id}")
+def get_control_point(
+    cp_id: int, game: Game = Depends(GameContext.get)
+) -> ControlPointJs:
+    cp = game.theater.find_control_point_by_id(cp_id)
+    if cp is None:
+        raise HTTPException(
+            status.HTTP_404_NOT_FOUND,
+            detail=f"Game has no control point with ID {cp_id}",
+        )
+    return ControlPointJs.for_control_point(cp)