## User-Model
class User(UserMixin, SurrogatePK, Model):
    """A user of the app."""

    __tablename__ = 'users'
    username = Column(db.String(80), unique=True, nullable=False)
    email = Column(db.String(80), unique=True, nullable=False)
    #: The hashed password
    password = Column(db.String(128), nullable=True)
    created_at = Column(db.DateTime, nullable=False,
                        default=datetime.datetime.utcnow)
    first_name = Column(db.String(30), nullable=True)
    last_name = Column(db.String(30), nullable=True)
    active = Column(db.Boolean(), default=False)
    is_admin = Column(db.Boolean(), default=False)

    def __init__(self, username="", email="", password=None, **kwargs):
        """Create instance."""
        db.Model.__init__(self, username=username, email=email, **kwargs)
        if password:
            self.set_password(password)
        else:
            self.password = None

    def __str__(self):
        """String representation of the user. Shows the users email address."""
        return self.email

    def set_password(self, password):
        """Set password"""
        self.password = bcrypt.generate_password_hash(password)

    def check_password(self, value):
        """Check password."""
        return bcrypt.check_password_hash(self.password, value)

    def get_id(self):
        """Return the email address to satisfy Flask-Login's requirements"""
        return self.id

    @property
    def full_name(self):
        """Full user name."""
        return "{0} {1}".format(self.first_name, self.last_name)

    @property
    def is_active(self):
        """Active or non active user (required by flask-login)"""
        return self.active

    @property
    def is_authenticated(self):
        """Return True if the user is authenticated."""
        if isinstance(self, AnonymousUserMixin):
         if isinstance(self, AnonymousUserMixin):
            return False
        else:
            return True

    @property
    def is_anonymous(self):
        """False, as anonymous users aren't supported."""
        return False


## Flask-Admin UserView
class UserView(MyModelView):
    """Flask user model view."""
    create_modal = True
    edit_modal = True

    def on_model_change(self, form, User, is_created):
        if form.password.data is not None:
            User.set_password(form.password.data)
        else:
           del form.password

    def on_form_prefill(self, form, id):
        form.password.data = ''