feat: Reorganized project, added user registration, throttling middleware, help command, profile command

app/middlewares/throttling.py

@@ -0,0 +1,26 @@
+__all__ = ("ThrottlingMiddleware",)
+
+from typing import Any, Awaitable, Callable, Dict
+
+from aiogram import BaseMiddleware
+from aiogram.types import Message
+from cachetools import TTLCache  # type: ignore
+
+
+class ThrottlingMiddleware(BaseMiddleware):
+
+    def __init__(self, time_limit: int | float = 2) -> None:
+        self.limit = TTLCache(maxsize=10_000, ttl=time_limit)
+
+    async def __call__(
+        self,
+        handler: Callable[[Message, Dict[str, Any]], Awaitable[Any]],
+        event: Message,  # type: ignore
+        data: Dict[str, Any],
+    ) -> Any | None:
+        if event.chat.id in self.limit:
+            return None
+
+        self.limit[event.chat.id] = None
+
+        return await handler(event, data)