Rendering code refactor

folkugat_web/utils.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import dataclasses
 import itertools
 from collections.abc import Callable, Iterable, Iterator
 from typing import Generic, Protocol, Self, TypeVar
@@ -55,3 +56,13 @@ def batched(iterable: Iterable[T], n: int) -> Iterator[tuple[T, ...]]:
     iterator = iter(iterable)
     while batch := tuple(itertools.islice(iterator, n)):
         yield batch
+
+
+ResultT = TypeVar("ResultT")
+ErrorT = TypeVar("ErrorT")
+
+
+@dataclasses.dataclass
+class Result(Generic[ResultT, ErrorT]):
+    result: ResultT | None = None
+    error: ErrorT | None = None