haldis/app/auth/zeus.py
2022-04-20 01:27:52 +02:00

89 lines
2.7 KiB
Python

"Script containing everything specific to ZeusWPI"
import typing
from flask import (Blueprint, current_app, flash, redirect, request, session,
url_for)
from flask_login import login_user
from flask_oauthlib.client import OAuth, OAuthException, OAuthRemoteApp
from models import User, db
from werkzeug.wrappers import Response
auth_zeus_bp = Blueprint("auth_zeus_bp", __name__)
def zeus_login():
"""Log in using ZeusWPI"""
return current_app.zeus.authorize(
callback=url_for("auth_zeus_bp.authorized", _external=True))
@auth_zeus_bp.route("/login")
def login():
"""Function to handle a user trying to log in"""
return zeus_login()
@auth_zeus_bp.route("/authorized")
def authorized() -> typing.Any:
# type is 'typing.Union[str, Response]', but this errors due to
# https://github.com/python/mypy/issues/7187
"""Check authorized status"""
resp = current_app.zeus.authorized_response()
if resp is None:
# pylint: disable=C0301
return f"Access denied: reason={request.args['error']} error={request.args['error_description']}"
if isinstance(resp, OAuthException):
return f"Access denied: {resp.message}<br>{resp.data}"
session["zeus_token"] = (resp["access_token"], "")
me = current_app.zeus.get("current_user/")
username = me.data.get("username", "").lower()
user = User.query.filter_by(username=username).first()
# pylint: disable=R1705
if username and user:
return login_and_redirect_user(user)
elif username:
user = create_user(username)
return login_and_redirect_user(user)
flash("You're not allowed to enter, please contact a system administrator")
return redirect(url_for("general_bp.home"))
def init_oauth(app) -> OAuthRemoteApp:
"""Initialize the OAuth for ZeusWPI"""
oauth = OAuth(app)
zeus = oauth.remote_app(
"zeus",
consumer_key=app.config["ZEUS_KEY"],
consumer_secret=app.config["ZEUS_SECRET"],
request_token_params={},
base_url="https://adams.ugent.be/oauth/api/",
access_token_method="POST",
access_token_url="https://adams.ugent.be/oauth/oauth2/token/",
authorize_url="https://adams.ugent.be/oauth/oauth2/authorize/",
)
# pylint: disable=W0612
@zeus.tokengetter
def get_zeus_oauth_token():
return session.get("zeus_token")
return zeus
def login_and_redirect_user(user) -> Response:
"""Log in the user and then redirect them"""
login_user(user)
return redirect(url_for("general_bp.home"))
def create_user(username) -> User:
"""Create a temporary user if it is needed"""
user = User()
user.configure(username, False, 1)
db.session.add(user)
db.session.commit()
return user