aiogram/examples/finite_state_machine_example.py
2019-06-29 19:53:18 +03:00

130 lines
3.8 KiB
Python

import asyncio
from typing import Optional
import aiogram.utils.markdown as md
from aiogram import Bot, Dispatcher, types
from aiogram.contrib.fsm_storage.memory import MemoryStorage
from aiogram.dispatcher import FSMContext
from aiogram.dispatcher.filters.state import State, StatesGroup
from aiogram.types import ParseMode
from aiogram.utils import executor
API_TOKEN = "BOT TOKEN HERE"
loop = asyncio.get_event_loop()
bot = Bot(token=API_TOKEN, loop=loop)
# For example use simple MemoryStorage for Dispatcher.
storage = MemoryStorage()
dp = Dispatcher(bot, storage=storage)
# States
class Form(StatesGroup):
name = State() # Will be represented in storage as 'Form:name'
age = State() # Will be represented in storage as 'Form:age'
gender = State() # Will be represented in storage as 'Form:gender'
@dp.message_handler(commands=["start"])
async def cmd_start(message: types.Message):
"""
Conversation's entry point
"""
# Set state
await Form.name.set()
await message.reply("Hi there! What's your name?")
# You can use state '*' if you need to handle all states
@dp.message_handler(state="*", commands=["cancel"])
@dp.message_handler(lambda message: message.text.lower() == "cancel", state="*")
async def cancel_handler(
message: types.Message, state: FSMContext, raw_state: Optional[str] = None
):
"""
Allow user to cancel any action
"""
if raw_state is None:
return
# Cancel state and inform user about it
await state.finish()
# And remove keyboard (just in case)
await message.reply("Canceled.", reply_markup=types.ReplyKeyboardRemove())
@dp.message_handler(state=Form.name)
async def process_name(message: types.Message, state: FSMContext):
"""
Process user name
"""
async with state.proxy() as data:
data["name"] = message.text
await Form.next()
await message.reply("How old are you?")
# Check age. Age gotta be digit
@dp.message_handler(lambda message: not message.text.isdigit(), state=Form.age)
async def failed_process_age(message: types.Message):
"""
If age is invalid
"""
return await message.reply("Age gotta be a number.\nHow old are you? (digits only)")
@dp.message_handler(lambda message: message.text.isdigit(), state=Form.age)
async def process_age(message: types.Message, state: FSMContext):
# Update state and data
await Form.next()
await state.update_data(age=int(message.text))
# Configure ReplyKeyboardMarkup
markup = types.ReplyKeyboardMarkup(resize_keyboard=True, selective=True)
markup.add("Male", "Female")
markup.add("Other")
await message.reply("What is your gender?", reply_markup=markup)
@dp.message_handler(
lambda message: message.text not in ["Male", "Female", "Other"], state=Form.gender
)
async def failed_process_gender(message: types.Message):
"""
In this example gender has to be one of: Male, Female, Other.
"""
return await message.reply("Bad gender name. Choose you gender from keyboard.")
@dp.message_handler(state=Form.gender)
async def process_gender(message: types.Message, state: FSMContext):
async with state.proxy() as data:
data["gender"] = message.text
# Remove keyboard
markup = types.ReplyKeyboardRemove()
# And send message
await bot.send_message(
message.chat.id,
md.text(
md.text("Hi! Nice to meet you,", md.bold(data["name"])),
md.text("Age:", data["age"]),
md.text("Gender:", data["gender"]),
sep="\n",
),
reply_markup=markup,
parse_mode=ParseMode.MARKDOWN,
)
# Finish conversation
data.state = None
if __name__ == "__main__":
executor.start_polling(dp, loop=loop, skip_updates=True)