Refactor and improve bot examples (#1256)

* Refactor and improve bot messages

Refactored bot code to use aiogram enumerations and enhanced chat messages with markdown beautifications for a more user-friendly display.

CommandStart() is now used instead of Command('start') for readability.

Furthermore, the bot's 'stop' command was improved, ensuring it executes appropriately during KeyboardInterrupt or SystemExit.

Additionally, the bot's logging was adjusted to output to sys.stdout for better logs' readability.

* Added Changelog

* Add guidance comments on obtaining bot tokens from environment variables

* Remove hardcoded tokens, opt for environment variable

* Remove unnecessary spaces and reorganize imports

* Fix error, switch default storage from Redis to Memory, and add logging to multibot example

examples/finite_state_machine.py

@@ -5,7 +5,8 @@ from os import getenv
 from typing import Any, Dict
 
 from aiogram import Bot, Dispatcher, F, Router, html
-from aiogram.filters import Command
+from aiogram.enums import ParseMode
+from aiogram.filters import Command, CommandStart
 from aiogram.fsm.context import FSMContext
 from aiogram.fsm.state import State, StatesGroup
 from aiogram.types import (
@@ -15,6 +16,8 @@ from aiogram.types import (
     ReplyKeyboardRemove,
 )
 
+TOKEN = getenv("BOT_TOKEN")
+
 form_router = Router()
 
 
@@ -24,7 +27,7 @@ class Form(StatesGroup):
     language = State()
 
 
-@form_router.message(Command("start"))
+@form_router.message(CommandStart())
 async def command_start(message: Message, state: FSMContext) -> None:
     await state.set_state(Form.name)
     await message.answer(
@@ -91,7 +94,7 @@ async def process_like_write_bots(message: Message, state: FSMContext) -> None:
 
 
 @form_router.message(Form.like_bots)
-async def process_unknown_write_bots(message: Message, state: FSMContext) -> None:
+async def process_unknown_write_bots(message: Message) -> None:
     await message.reply("I don't understand you :(")
 
 
@@ -99,12 +102,12 @@ async def process_unknown_write_bots(message: Message, state: FSMContext) -> Non
 async def process_language(message: Message, state: FSMContext) -> None:
     data = await state.update_data(language=message.text)
     await state.clear()
-    text = (
-        "Thank for all! Python is in my hearth!\nSee you soon."
-        if message.text.casefold() == "python"
-        else "Thank for information!\nSee you soon."
-    )
-    await message.answer(text)
+
+    if message.text.casefold() == "python":
+        await message.reply(
+            "Python, you say? That's the language that makes my circuits light up! 😉"
+        )
+
     await show_summary(message=message, data=data)
 
 
@@ -121,7 +124,7 @@ async def show_summary(message: Message, data: Dict[str, Any], positive: bool =
 
 
 async def main():
-    bot = Bot(token=getenv("TELEGRAM_TOKEN"), parse_mode="HTML")
+    bot = Bot(token=TOKEN, parse_mode=ParseMode.HTML)
     dp = Dispatcher()
     dp.include_router(form_router)
 
@@ -130,4 +133,7 @@ async def main():
 
 if __name__ == "__main__":
     logging.basicConfig(level=logging.INFO, stream=sys.stdout)
-    asyncio.run(main())
+    try:
+        asyncio.run(main())
+    except (KeyboardInterrupt, SystemExit):
+        logging.info("Bot stopped!")