All the Telegram login via django_telegram_login package logic

all-needed-views.py

from django.conf import settings
from django.http import HttpResponse
from django.shortcuts import render

from django_telegram_login.widgets.constants import (
    SMALL, 
    MEDIUM, 
    LARGE,
    DISABLE_USER_PHOTO,
)
from django_telegram_login.widgets.generator import (
    create_callback_login_widget,
    create_redirect_login_widget,
)
from django_telegram_login.authentication import verify_telegram_authentication
from django_telegram_login.errors import (
    NotTelegramDataError, 
    TelegramDataIsOutdatedError,
)

bot_name = settings.TELEGRAM_BOT_NAME
bot_token = settings.TELEGRAM_BOT_TOKEN
redirect_url = settings.TELEGRAM_LOGIN_REDIRECT_URL

from django_telegram_login.authentication import verify_telegram_authentication
from django_telegram_login.errors import (
    NotTelegramDataError, 
    TelegramDataIsOutdatedError,
)


def index(request):

    # Initially, the index page may have no get params in URL
    # For example, if it is a home page, a user should be redirected from the widget
    if not request.GET.get('hash'):
        return HttpResponse('Handle the missing Telegram data in the response.')

    try:
        result = verify_telegram_authentication(bot_token=bot_token, request_data=request.GET)

    except TelegramDataIsOutdatedError:
        return HttpResponse('Authentication was received more than a day ago.')

    except NotTelegramDataError:
        return HttpResponse('The data is not related to Telegram!')

    # Or handle it as you wish. For instance, save to the database.
    return HttpResponse('Hello, ' + result['first_name'] + '!')
    
    
def callback(request):
    telegram_login_widget = create_callback_login_widget(bot_name, size=SMALL)

    context = {'telegram_login_widget': telegram_login_widget}
    return render(request, 'telegram_auth/callback.html', context)


def redirect(request):
    telegram_login_widget = create_redirect_login_widget(
        redirect_url, bot_name, size=LARGE, user_photo=DISABLE_USER_PHOTO
    )

    context = {'telegram_login_widget': telegram_login_widget}
    return render(request, 'telegram_auth/redirect.html', context)