Initial project commit

server/app/services/point_service.py

@@ -0,0 +1,34 @@
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.point_ledger import PointLedger
+
+
+async def grant_points(
+    db: AsyncSession,
+    user_id: int,
+    change: int,
+    reason: str,
+    ref_type: str | None = None,
+    ref_id: int | None = None,
+) -> PointLedger:
+    last_entry = await db.execute(
+        select(PointLedger)
+        .where(PointLedger.user_id == user_id)
+        .order_by(PointLedger.id.desc())
+        .limit(1)
+    )
+    last = last_entry.scalar_one_or_none()
+    current_balance = last.balance if last else 0
+
+    ledger = PointLedger(
+        user_id=user_id,
+        change=change,
+        balance=current_balance + change,
+        reason=reason,
+        ref_type=ref_type,
+        ref_id=ref_id,
+    )
+    db.add(ledger)
+    await db.flush()
+    return ledger