refactor: restructure project into layered architecture

backend/api/user.py

@@ -0,0 +1,59 @@
+from fastapi import APIRouter
+from fastapi import Depends
+from fastapi import HTTPException
+
+from sqlalchemy.orm import Session
+
+import schemas
+from services import crud
+
+from app.db.session import SessionLocal
+
+
+router = APIRouter()
+
+
+def get_db():
+
+    db = SessionLocal()
+
+    try:
+        yield db
+
+    finally:
+        db.close()
+
+
+# GET ITEMS
+@router.get(
+    "/items",
+    response_model=list[schemas.ItemResponse]
+)
+def get_items(
+    db: Session = Depends(get_db)
+):
+
+    return crud.get_items(db)
+
+
+# SPIN
+@router.post("/spin")
+def spin(
+    db: Session = Depends(get_db)
+):
+
+    winner = crud.spin_wheel(db)
+
+    if not winner:
+
+        raise HTTPException(
+            status_code=400,
+            detail="No items available"
+        )
+
+    return {
+        "winner": {
+            "id": winner.id,
+            "title": winner.title
+        }
+    }