class ValidAuth(formencode.validators.FancyValidator):

    messages = {

            'invalid_password':_('invalid password'),

            'invalid_login':_('invalid user name'),

            'disabled_account':_('Your acccount is disabled')

            }

    #error mapping

    e_dict = {'username':messages['invalid_login'],

              'password':messages['invalid_password']}

    def validate_python(self, value, state):

        sa = meta.Session

        crypted_passwd = get_crypt_password(value['password'])

        username = value['username']

        try:

            user = sa.query(Users).filter(Users.username == username).one()

        except (NoResultFound, MultipleResultsFound, OperationalError) as e:

            log.error(e)

            user = None

        if user:

            if user.active:

                if user.username == username and user.password == crypted_passwd:

                    from pylons_app.lib.auth import AuthUser

                    auth_user = AuthUser()

                    auth_user.username = username

                    auth_user.is_authenticated = True

                    auth_user.is_admin = user.admin

                    session['hg_app_user'] = auth_user

                    session.save()

                    return value

                else:

                    log.warning('user %s not authenticated', username)

                    raise formencode.Invalid(self.message('invalid_password',

                                             state=State_obj), value, state,

                                             error_dict=self.e_dict)

            else:

                log.warning('user %s is disabled', username)

                raise formencode.Invalid(self.message('disabled_account',

                                         state=State_obj),

                                         value, state, error_dict=self.e_dict)

#===============================================================================

# FORMS        

#===============================================================================

class LoginForm(formencode.Schema):

    allow_extra_fields = True

    filter_extra_fields = True

    username = UnicodeString(

                             strip=True,

                             min=3,

                             not_empty=True,