ScoDoc/app/auth/models.py

263 lines
8.1 KiB
Python

# -*- coding: UTF-8 -*
"""Users and Roles models for ScoDoc
"""
import base64
from datetime import datetime, timedelta
from hashlib import md5
import json
import os
from time import time
from flask import current_app, url_for
from flask_login import UserMixin, AnonymousUserMixin
from werkzeug.security import generate_password_hash, check_password_hash
import jwt
from app import db, login
from app.scodoc.sco_permissions import Permission
from app.scodoc.sco_roles_default import SCO_ROLES_DEFAULTS
class User(UserMixin, db.Model):
"""ScoDoc users, handled by Flask / SQLAlchemy"""
id = db.Column(db.Integer, primary_key=True)
username = db.Column(db.String(64), index=True, unique=True)
email = db.Column(db.String(120), index=True, unique=True)
password_hash = db.Column(db.String(128))
about_me = db.Column(db.String(140))
last_seen = db.Column(db.DateTime, default=datetime.utcnow)
token = db.Column(db.String(32), index=True, unique=True)
token_expiration = db.Column(db.DateTime)
roles = db.relationship("Role", secondary="user_role", viewonly=True)
Permission = Permission
def __init__(self, **kwargs):
self.roles = []
super(User, self).__init__(**kwargs)
if (
not self.roles
and self.email
and self.email == current_app.config["SCODOC_ADMIN_MAIL"]
):
# super-admin
admin_role = Role.query.filter_by(name="Admin").first()
assert admin_role
self.add_role(admin_role, None)
db.session.commit()
current_app.logger.info("creating user with roles={}".format(self.roles))
def __repr__(self):
return "<User {}>".format(self.username)
def __str__(self):
return self.username
def set_password(self, password):
"Set password"
if password:
self.password_hash = generate_password_hash(password)
else:
self.password_hash = None
def check_password(self, password):
"""Check given password vs current one.
Returns `True` if the password matched, `False` otherwise.
"""
if not self.password_hash: # user without password can't login
return False
return check_password_hash(self.password_hash, password)
def get_reset_password_token(self, expires_in=600):
return jwt.encode(
{"reset_password": self.id, "exp": time() + expires_in},
current_app.config["SECRET_KEY"],
algorithm="HS256",
).decode("utf-8")
@staticmethod
def verify_reset_password_token(token):
try:
id = jwt.decode(
token, current_app.config["SECRET_KEY"], algorithms=["HS256"]
)["reset_password"]
except:
return
return User.query.get(id)
def to_dict(self, include_email=False):
data = {
"id": self.id,
"username": self.username,
"last_seen": self.last_seen.isoformat() + "Z",
"about_me": self.about_me,
}
if include_email:
data["email"] = self.email
return data
def from_dict(self, data, new_user=False):
for field in ["username", "email", "about_me"]:
if field in data:
setattr(self, field, data[field])
if new_user and "password" in data:
self.set_password(data["password"])
def get_token(self, expires_in=3600):
now = datetime.utcnow()
if self.token and self.token_expiration > now + timedelta(seconds=60):
return self.token
self.token = base64.b64encode(os.urandom(24)).decode("utf-8")
self.token_expiration = now + timedelta(seconds=expires_in)
db.session.add(self)
return self.token
def revoke_token(self):
self.token_expiration = datetime.utcnow() - timedelta(seconds=1)
@staticmethod
def check_token(token):
user = User.query.filter_by(token=token).first()
if user is None or user.token_expiration < datetime.utcnow():
return None
return user
# Permissions management:
def has_permission(self, perm, dept):
"""Check if user has permission `perm` in given `dept`.
Emulate Zope `has_permission``
Args:
perm: integer, one of the value defined in Permission class.
context:
"""
# les role liés à ce département, et les roles avec dept=None (super-admin)
roles_in_dept = (
UserRole.query.filter_by(user_id=self.id)
.filter((UserRole.dept == dept) | (UserRole.dept == None))
.all()
)
for user_role in roles_in_dept:
if user_role.role.has_permission(perm):
return True
return False
# Role management
def add_role(self, role, dept):
"""Add a role to this user.
:param role: Role to add.
"""
self.user_roles.append(UserRole(user=self, role=role, dept=dept))
def add_roles(self, roles, dept):
"""Add roles to this user.
:param roles: Roles to add.
"""
for role in roles:
self.add_role(role, dept)
def set_roles(self, roles, dept):
self.user_roles = [UserRole(user=self, role=r, dept=dept) for r in roles]
def get_roles(self):
for role in self.roles:
yield role
def is_administrator(self):
return self.has_permission(Permission.ScoSuperAdmin, None)
class AnonymousUser(AnonymousUserMixin):
def has_permission(self, perm, dept=None):
return False
def is_administrator(self):
return False
login.anonymous_user = AnonymousUser
class Role(db.Model):
"""Roles for ScoDoc"""
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(64), unique=True)
default = db.Column(db.Boolean, default=False, index=True)
permissions = db.Column(db.BigInteger) # 64 bits
users = db.relationship("User", secondary="user_role", viewonly=True)
# __table_args__ = (db.UniqueConstraint("name", "dept", name="_rolename_dept_uc"),)
def __init__(self, **kwargs):
super(Role, self).__init__(**kwargs)
if self.permissions is None:
self.permissions = 0
def __repr__(self):
return "<Role {} perm={:0{w}b}>".format(
self.name,
self.permissions & ((1 << Permission.NBITS) - 1),
w=Permission.NBITS,
)
def add_permission(self, perm):
self.permissions |= perm
def remove_permission(self, perm):
self.permissions = self.permissions & ~perm
def reset_permissions(self):
self.permissions = 0
def has_permission(self, perm):
return self.permissions & perm == perm
@staticmethod
def insert_roles():
"""Create default roles"""
default_role = "Observateur"
for r, permissions in SCO_ROLES_DEFAULTS.items():
role = Role.query.filter_by(name=r).first()
if role is None:
role = Role(name=r)
role.reset_permissions()
for perm in permissions:
role.add_permission(perm)
role.default = role.name == default_role
db.session.add(role)
db.session.commit()
@staticmethod
def get_named_role(name):
"""Returns existing role with given name, or None."""
return Role.query.filter_by(name=name).first()
class UserRole(db.Model):
"""Associate user to role, in a dept.
If dept is None, the role applies to all departments (eg super admin).
"""
id = db.Column(db.Integer, primary_key=True)
user_id = db.Column(db.Integer, db.ForeignKey("user.id"))
role_id = db.Column(db.Integer, db.ForeignKey("role.id"))
dept = db.Column(db.String(64))
user = db.relationship(
User, backref=db.backref("user_roles", cascade="all, delete-orphan")
)
role = db.relationship(
Role, backref=db.backref("user_roles", cascade="all, delete-orphan")
)
def __repr__(self):
return "<UserRole u={} r={} dept={}>".format(self.user, self.role, self.dept)
@login.user_loader
def load_user(id):
return User.query.get(int(id))