# -*- coding: utf-8 -*-
# vim: autoindent shiftwidth=4 expandtab textwidth=80 tabstop=4 softtabstop=4

###############################################################################
# ScribeEngine - Open Source Blog Software                                    #
# --------------------------------------------------------------------------- #
# Copyright (c) 2010 Raoul Snyman                                             #
# --------------------------------------------------------------------------- #
# This program is free software; you can redistribute it and/or modify it     #
# under the terms of the GNU General Public License as published by the Free  #
# Software Foundation; version 2 of the License.                              #
#                                                                             #
# This program is distributed in the hope that it will be useful, but WITHOUT #
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or       #
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for    #
# more details.                                                               #
#                                                                             #
# You should have received a copy of the GNU General Public License along     #
# with this program; if not, write to the Free Software Foundation, Inc., 59  #
# Temple Place, Suite 330, Boston, MA 02111-1307 USA                          #
###############################################################################

"""
Server-side validators.
"""
import logging
import re

from formencode.api import FancyValidator, Invalid
from formencode.validators import UnicodeString, Int, Email, FieldsMatch

log = logging.getLogger(__name__)

class Password(FancyValidator):
    """
    This validator checks for a decently secure password. The password has to
    contain a minimum of 6 characters, at least 1 number.
    """
    regex = re.compile(r'^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[-.!@#%&]).{6,}$')

    messages = {
        u'insecure': u'Your password must be longer than 6 characters and '
                     u'must have at least 1 capital letter, 1 number and one '
                     u'of the following characters: - . ~ @ # %% &'
        }

    def _to_python(self, value, state):
        # _to_python gets run before validate_python.  Here we
        # strip whitespace off the password, because leading and
        # trailing whitespace in a password is too elite.
        return value.strip()

    def validate_python(self, value, state):
        if len(value) < self.min:
            raise Invalid(self.message(u'insecure', state), value, state)
        if not self.regex.match(value):
            raise Invalid(self.message(u'insecure', state), value, state)