Some refactor. Some docstrings.

web/__init__.py

@@ -1,34 +1,44 @@
 import logging
+from aiogram import Bot, Dispatcher
 from aiogram.dispatcher.webhook import configure_app
-from aiohttp import web
+from aiohttp.web import Application
 
-from config import config
-from telegram import telegram_bot, telegram_dispatcher
+from config import Config
 from .routes import routes, TELEGRAM_WEBHOOK_ROUTE
 
 
-TELEGRAM_WEBHOOK_URL = f'{config.base_url}{TELEGRAM_WEBHOOK_ROUTE}'
+def create_app(bot: Bot,
+               dispatcher: Dispatcher,
+               config: Config) -> Application:
+    """
+    Create aiohttp application.
+
+    :param bot: telegram bot instance.
+    :param dispatcher: telegram dispatcher instance.
+    :param config: config object.
+    :return: aiohttp Appliction.
+    """
+
+    telegram_webhook_url = f'{config.base_url}{TELEGRAM_WEBHOOK_ROUTE}'
+
+    async def on_startup(_):
+        await bot.set_webhook(telegram_webhook_url)
+
+    async def on_shutdown(_):
+        logging.warning('Shutting down')
+        await bot.delete_webhook()
+        await dispatcher.storage.close()
+        await dispatcher.storage.wait_closed()
+        session = await bot.get_session()
+        await session.close()
+        logging.warning('Bye!..')
+
+    app = Application()
+    app.add_routes(routes)
+    app.on_startup.append(on_startup)
+    app.on_shutdown.append(on_shutdown)
+    configure_app(dispatcher, app, TELEGRAM_WEBHOOK_ROUTE)
+    return app
 
 
-async def on_startup(_):
-    await telegram_bot.set_webhook(TELEGRAM_WEBHOOK_URL)
-
-
-async def on_shutdown(_):
-    logging.warning('Shutting down')
-    await telegram_bot.delete_webhook()
-    await telegram_dispatcher.storage.close()
-    await telegram_dispatcher.storage.wait_closed()
-    session = await telegram_bot.get_session()
-    await session.close()
-    logging.warning('Bye!..')
-
-
-app = web.Application()
-app.add_routes(routes)
-app.on_startup.append(on_startup)
-app.on_shutdown.append(on_shutdown)
-configure_app(telegram_dispatcher, app, TELEGRAM_WEBHOOK_ROUTE)
-
-
-__all__ = ('app',)
+__all__ = ('create_app',)