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"""User-specific code and data structures."""
from uuid import UUID
from typing import NamedTuple
import bcrypt
from pymonad.maybe import Just, Maybe, Nothing
from gn3.auth import db
class User(NamedTuple):
"""Class representing a user."""
user_id: UUID
email: str
name: str
def get_user_id(self):
"""Return the user's UUID. Mostly for use with Authlib."""
return self.user_id
def user_by_email(conn: db.DbConnection, email: str) -> Maybe:
"""Retrieve user from database by their email address"""
with db.cursor(conn) as cursor:
cursor.execute("SELECT * FROM users WHERE email=?", (email,))
row = cursor.fetchone()
if row:
return Just(User(UUID(row["user_id"]), row["email"], row["name"]))
return Nothing
def user_by_id(conn: db.DbConnection, user_id: UUID) -> Maybe:
"""Retrieve user from database by their user id"""
with db.cursor(conn) as cursor:
cursor.execute("SELECT * FROM users WHERE user_id=?", (str(user_id),))
row = cursor.fetchone()
if row:
return Just(User(UUID(row["user_id"]), row["email"], row["name"]))
return Nothing
def valid_login(conn: db.DbConnection, user: User, password: str) -> bool:
"""Check the validity of the provided credentials for login."""
with db.cursor(conn) as cursor:
cursor.execute(
("SELECT * FROM users LEFT JOIN user_credentials "
"ON users.user_id=user_credentials.user_id "
"WHERE users.user_id=?"),
(str(user.user_id),))
row = cursor.fetchone()
if row is None:
return False
return bcrypt.checkpw(password.encode("utf-8"), row["password"])
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