v1 milestone

venv/lib/python3.12/site-packages/aiogram/dispatcher/middlewares/base.py

@@ -0,0 +1,29 @@
+from abc import ABC, abstractmethod
+from typing import Any, Awaitable, Callable, Dict, TypeVar
+
+from aiogram.types import TelegramObject
+
+T = TypeVar("T")
+
+
+class BaseMiddleware(ABC):
+    """
+    Generic middleware class
+    """
+
+    @abstractmethod
+    async def __call__(
+        self,
+        handler: Callable[[TelegramObject, Dict[str, Any]], Awaitable[Any]],
+        event: TelegramObject,
+        data: Dict[str, Any],
+    ) -> Any:  # pragma: no cover
+        """
+        Execute middleware
+
+        :param handler: Wrapped handler in middlewares chain
+        :param event: Incoming event (Subclass of :class:`aiogram.types.base.TelegramObject`)
+        :param data: Contextual data. Will be mapped to handler arguments
+        :return: :class:`Any`
+        """
+        pass