feat(market): basic page + submit

polylan_submitter/market/api.py

@@ -0,0 +1,99 @@
+from typing import List
+from ninja import Router
+from ninja.errors import HttpError
+from django.shortcuts import get_object_or_404
+
+from market.models import Market, MarketOption, UserBet
+from market.schemas import (
+    MarketListSchema,
+    ResolveMarketSchema,
+    UserBetCreateSchema,
+    UserBetSchema,
+)
+
+
+router = Router(tags=["market"])
+
+
+@router.get("/", response=List[MarketListSchema])
+def list_markets(request):
+    """List all markets."""
+    return Market.objects.prefetch_related("options").all()
+
+
+@router.get("/user/bets", response=List[UserBetSchema])
+def list_user_bets(request):
+    """List all bets placed by the current user."""
+    if not request.user.is_authenticated:
+        raise HttpError(401, "Authentication required")
+
+    return UserBet.objects.filter(user=request.user).select_related(
+        "option__market"
+    ).prefetch_related("option__market__options")
+
+
+@router.post("/{market_uuid}/actions/close")
+def close_market(request, market_uuid: str):
+    """Close a market. Admin only."""
+    if not request.user.is_staff:
+        raise HttpError(403, "Permission denied")
+
+    market = get_object_or_404(Market, uuid=market_uuid)
+    market.status = Market.Status.CLOSED
+    market.save(update_fields=["status", "updated_at"])
+    return {"status": "closed"}
+
+
+@router.post("/{market_uuid}/actions/resolve", response=MarketListSchema)
+def resolve_market(request, market_uuid: str, payload: ResolveMarketSchema):
+    """Resolve a market with a winning option. Admin only."""
+    if not request.user.is_staff:
+        raise HttpError(403, "Permission denied")
+
+    market = get_object_or_404(Market, uuid=market_uuid)
+    winning_option = get_object_or_404(MarketOption, uuid=payload.winning_option_uuid)
+
+    if winning_option.market_id != market.id:
+        raise HttpError(400, "Option does not belong to this market")
+
+    market.winning_option = winning_option
+    market.status = Market.Status.RESOLVED
+    market.save(update_fields=["winning_option", "status", "updated_at"])
+    return market
+
+
+@router.post("/{market_uuid}/bets", response=UserBetSchema)
+def create_bet(request, market_uuid: str, payload: UserBetCreateSchema):
+    """Place a bet on a market option."""
+    if not request.user.is_authenticated:
+        raise HttpError(401, "Authentication required")
+
+    market = get_object_or_404(Market, uuid=market_uuid)
+    option = get_object_or_404(MarketOption, uuid=payload.option_uuid)
+
+    if option.market_id != market.id:
+        raise HttpError(400, "Option does not belong to this market")
+
+    if market.status != Market.Status.OPEN:
+        raise HttpError(400, "Market is not open for betting")
+
+    # Check if user already has a bet on a different option in this market
+    existing_bet_on_market = UserBet.objects.filter(
+        user=request.user,
+        option__market=market
+    ).exclude(option=option).first()
+    if existing_bet_on_market:
+        raise HttpError(400, "You can only bet on one option per market")
+
+    # Check if user already has a bet on this option
+    existing_bet = UserBet.objects.filter(user=request.user, option=option).first()
+    if existing_bet and payload.amount < existing_bet.amount:
+        raise HttpError(400, "Cannot decrease bet amount. You can only increase it.")
+
+    user_bet, created = UserBet.objects.update_or_create(
+        user=request.user,
+        option=option,
+        defaults={"amount": payload.amount},
+    )
+
+    return user_bet