Initial local state

tgbot/middlewares/middleware_throttling.py

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+# - *- coding: utf- 8 - *-
+import time
+from typing import Any, Awaitable, Callable, Dict, Optional, Union
+
+from aiogram import BaseMiddleware
+from aiogram.dispatcher.flags import get_flag
+from aiogram.types import CallbackQuery, Message, TelegramObject, User
+from cachetools import TTLCache
+
+from tgbot.data.config import BOT_THROTTLE_RATE
+
+
+class ThrottlingMiddleware(BaseMiddleware):
+    # Создание хранилищ лимитов
+    def __init__(self, default_rate: Union[int, float] = BOT_THROTTLE_RATE) -> None:
+        self.default_rate = default_rate
+        self.message_users = TTLCache(maxsize=10_000, ttl=600)
+        self.callback_users = TTLCache(maxsize=10_000, ttl=600)
+
+    # Ограничение частых сообщений и колбэков
+    async def __call__(self, handler: Callable[[TelegramObject, Dict[str, Any]], Awaitable[Any]], event: TelegramObject, data):
+        this_user: Optional[User] = data.get("event_from_user")
+
+        if this_user is None:
+            return await handler(event, data)
+
+        flag_rate = get_flag(data, "rate")
+        rate = float(self.default_rate if flag_rate is None else flag_rate)
+
+        if rate == 0:
+            return await handler(event, data)
+
+        now_time = time.monotonic()
+        bucket = self._get_bucket(event)
+        user_key = this_user.id
+
+        if user_key not in bucket:
+            bucket[user_key] = {
+                "last_throttled": now_time,
+                "count_throttled": 0,
+                "now_rate": rate,
+            }
+
+            return await handler(event, data)
+
+        if now_time - bucket[user_key]["last_throttled"] >= bucket[user_key]["now_rate"]:
+            bucket.pop(user_key)
+
+            return await handler(event, data)
+
+        bucket[user_key]["last_throttled"] = now_time
+        bucket[user_key]["count_throttled"] += 1
+
+        if bucket[user_key]["count_throttled"] == 1:
+            bucket[user_key]["now_rate"] = rate + 2
+            await self._warn_user(event)
+        elif bucket[user_key]["count_throttled"] == 2:
+            bucket[user_key]["now_rate"] = rate + 3
+        else:
+            bucket[user_key]["now_rate"] = rate + 5
+
+        return None
+
+    # Выбор bucket под тип апдейта
+    def _get_bucket(self, event: TelegramObject) -> TTLCache:
+        if isinstance(event, CallbackQuery):
+            return self.callback_users
+
+        return self.message_users
+
+    # Предупреждение пользователя о спаме
+    @staticmethod
+    async def _warn_user(event: TelegramObject) -> None:
+        if isinstance(event, Message):
+            await event.reply("<b>❗ Пожалуйста, не спамьте</b>")
+        elif isinstance(event, CallbackQuery) or hasattr(event, "answer"):
+            await event.answer("❗ Пожалуйста, не спамьте", cache_time=1)