feat(market): graph for fun

polylan_submitter/market/api.py

@@ -14,6 +14,7 @@ from market.models import (
     get_event_points,
 )
 from market.schemas import (
+    BetHistoryPointSchema,
     MarketListSchema,
     ResolveMarketSchema,
     UserBetCreateSchema,
@@ -61,6 +62,36 @@ def get_user_points(request, event_path: str):
     return {"points": get_event_points(request.user, request.event)}
 
 
+@router.get(f"{PREFIX}/{{market_uuid}}/history", response=List[BetHistoryPointSchema])
+def bet_history(request, event_path: str, market_uuid: str):
+    """Points added to each option over time (anonymous, one entry per bet placed/increased)."""
+    market = get_object_or_404(
+        Market.objects.exclude(status=Market.Status.DRAFT),
+        uuid=market_uuid,
+        event=request.event,
+    )
+
+    # A user can only bet on one option per market, so their option is unique
+    option_by_user = dict(
+        UserBet.objects.filter(option__market=market).values_list(
+            "user_id", "option__uuid"
+        )
+    )
+    changes = UserPointChange.objects.filter(
+        market=market, reason=UserPointChange.Reason.BET_PLACED
+    ).order_by("created_at")
+
+    return [
+        {
+            "option_uuid": str(option_by_user[change.user_id]),
+            "created_at": change.created_at,
+            "amount": -change.amount,
+        }
+        for change in changes
+        if change.user_id in option_by_user
+    ]
+
+
 @router.post(f"{PREFIX}/{{market_uuid}}/actions/close")
 def close_market(request, event_path: str, market_uuid: str):
     """Close a market. Admin only."""

polylan_submitter/market/schemas.py

@@ -39,6 +39,12 @@ class UserPointsSchema(Schema):
     points: int
 
 
+class BetHistoryPointSchema(Schema):
+    option_uuid: str
+    created_at: datetime
+    amount: int
+
+
 class UserBetCreateSchema(Schema):
     option_uuid: str
     amount: int