I created a telegram bot to analyze user texts. Now I want to add the ability to process a pdf-file after clicking on the “Document Analysis” button. But I have no idea how to solve this problem, searching the Internet does not give a good result. ChatGPT doesn’t give good results either

I use the aiogram library

logging.basicConfig(level = logging.INFO)
bot = Bot(token=config.bot_token.get_secret_value())
dp = Dispatcher()

@dp.message(Command("start"))
async def cmd_start(message: types.Message):
    kb = [
        [
            types.KeyboardButton(text = "Text analysis"),
            types.KeyboardButton(text = "Document analysis")
        ],
    ]
    keyboard = types.ReplyKeyboardMarkup(
        keyboard = kb,
        resize_keyboard = True,
        input_field_placeholder = "Select the method of text transmission for analysis"
    )
    await message.answer(f"Hello", 
                         reply_markup=keyboard)

users_state = {}

@dp.message(F.text == "Text analysis")
async def without_puree(message: types.Message):
    users_state[message.from_user.id] = "waiting_for_text"
    await message.answer("Enter the text")

Can anyone share a suitable code?