Move global filters check placement into router to add chance to pass context from global filters into handlers in the same way as it possible in other places

aiogram/dispatcher/event/telegram.py

@@ -101,17 +101,14 @@ class TelegramEventObserver:
         )
         return wrapped_outer(event, data)
 
+    def check_root_filters(self, event: TelegramObject, **kwargs: Any) -> Any:
+        return self._handler.check(event, **kwargs)
+
     async def trigger(self, event: TelegramObject, **kwargs: Any) -> Any:
         """
         Propagate event to handlers and stops propagation on first match.
-        Handler will be called when all its filters is pass.
+        Handler will be called when all its filters are pass.
         """
-        # Check globally defined filters before any other handler will be checked
-        result, data = await self._handler.check(event, **kwargs)
-        if not result:
-            return REJECTED
-        kwargs.update(data)
-
         for handler in self.handlers:
             result, data = await handler.check(event, **kwargs)
             if result:

aiogram/dispatcher/router.py

@@ -125,8 +125,17 @@ class Router:
     ) -> Any:
         response = UNHANDLED
         if observer:
+            # Check globally defined filters before any other handler will be checked.
+            # This check is placed here instead of `trigger` method to add possibility
+            # to pass context to handlers from global filters.
+            result, data = await observer.check_root_filters(event, **kwargs)
+            if not result:
+                return UNHANDLED
+            kwargs.update(data)
+
             response = await observer.trigger(event, **kwargs)
-            if response is REJECTED:
+            if response is REJECTED:  # pragma: no cover
+                # Possible only if some handler returns REJECTED
                 return UNHANDLED
             if response is not UNHANDLED:
                 return response

examples/context_addition_from_filter.py

@@ -4,7 +4,6 @@ from aiogram import Router
 from aiogram.filters import Filter
 from aiogram.types import Message, User
 
-
 router = Router(name=__name__)
 
 
@@ -28,6 +27,4 @@ class HelloFilter(Filter):
 async def my_handler(
     message: Message, name: str  # Now we can accept "name" as named parameter
 ) -> Any:
-    return message.answer(
-        "Hello, {name}!".format(name=name)
-    )
+    return message.answer("Hello, {name}!".format(name=name))

examples/multibot.py

@@ -4,6 +4,7 @@ from os import getenv
 from typing import Any, Dict, Union
 
 from aiohttp import web
+from finite_state_machine import form_router
 
 from aiogram import Bot, Dispatcher, F, Router
 from aiogram.client.session.aiohttp import AiohttpSession
@@ -18,7 +19,6 @@ from aiogram.webhook.aiohttp_server import (
     TokenBasedRequestHandler,
     setup_application,
 )
-from finite_state_machine import form_router
 
 main_router = Router()
 

tests/test_dispatcher/test_event/test_telegram.py

@@ -5,7 +5,7 @@ from typing import Any, Dict, NoReturn, Optional, Union
 import pytest
 from pydantic import BaseModel
 
-from aiogram.dispatcher.event.bases import REJECTED, SkipHandler
+from aiogram.dispatcher.event.bases import SkipHandler, UNHANDLED
 from aiogram.dispatcher.event.handler import HandlerObject
 from aiogram.dispatcher.event.telegram import TelegramEventObserver
 from aiogram.dispatcher.router import Router
@@ -13,6 +13,7 @@ from aiogram.exceptions import UnsupportedKeywordArgument
 from aiogram.filters import Filter
 from aiogram.types import Chat, Message, User
 
+
 # TODO: Test middlewares in routers tree
 
 
@@ -220,8 +221,8 @@ class TestTelegramEventObserver:
         r1.message.register(handler)
         r2.message.register(handler)
 
-        assert await r1.message.trigger(None) is REJECTED
-        assert await r2.message.trigger(None) is None
+        assert await r1.propagate_event("message", None) is UNHANDLED
+        assert await r2.propagate_event("message", None) is None
 
     async def test_global_filter_in_nested_router(self):
         r1 = Router()
@@ -234,4 +235,4 @@ class TestTelegramEventObserver:
         r1.message.filter(lambda evt: False)
         r2.message.register(handler)
 
-        assert await r1.message.trigger(None) is REJECTED
+        assert await r1.message.trigger(None) is UNHANDLED