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