#!/usr/bin/python2.5

#

# Copyright 2008 the Melange authors.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

# 

#   http://www.apache.org/licenses/LICENSE-2.0

# 

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

"""This module contains the User Model."""

__authors__ = [

  '"Todd Larsen" <tlarsen@google.com>',

  '"Sverre Rabbelier" <sverre@rabbelier.nl>',

  '"Pawel Solyga" <pawel.solyga@gmail.com>',

]

from google.appengine.api import users

from google.appengine.ext import db

from django.utils.translation import ugettext_lazy

from soc.models import base

class User(base.ModelWithFieldAttributes):

  """A user and associated login credentials, the fundamental identity entity.

  User is a separate Model class from Person because the same login 

  ID may be used to, for example, serve as Contributor in one Program 

  and a Reviewer in another.

  Also, this allows a Person to, in the future, re-associate that 

  Person entity with a different Google Account if necessary.

  A User entity participates in the following relationships implemented 

  as a db.ReferenceProperty elsewhere in another db.Model:

   persons)  a 1:many relationship of Person entities identified by the

     User.  This relation is implemented as the 'persons' back-reference

     Query of the Person model 'user' reference.

   documents)  a 1:many relationship of Document entities identified by the

     User.  This relation is implemented as the 'user' back-reference

     Query of the Document model 'user' reference.

   groups)  a 1:many relationship of Group entities "founded" by the User.

     This relation is implemented as the 'groups' back-reference Query of

     the Group model 'founder' reference.

   responses)  a 1:many relationship of Reponse entities submitted by the

     User.  This relation is implemented as the 'responses' back-reference

     Query of the Response model 'respondent' reference.

  """

  #: A Google Account, which also provides a "private" email address.

  #: This email address is only used in an automated fashion by 

  #: Melange web applications and is not made visible to other users 

  #: of any Melange application.

  id = db.UserProperty(required=True,

      verbose_name=ugettext_lazy('User account'))

  id.help_text = ugettext_lazy(

      'Email address of a valid user (Google Account).')

  #: A list (possibly empty) of former Google Accounts associated with

  #: this User.

  former_ids = db.ListProperty(users.User)

  #: Required field storing a nickname; displayed publicly.

  #: Nicknames can be any valid UTF-8 text.

  nick_name = db.StringProperty(required=True,

      verbose_name=ugettext_lazy('Nick name'))

  #: Required field storing link_name used in URLs to identify user.

  #: Lower ASCII characters only.

  link_name = db.StringProperty(required=True,

      verbose_name=ugettext_lazy('Link name'))

  link_name.help_text = ugettext_lazy(

      'Field used in URLs to identify user. '

      'Lower ASCII characters only.')

  #: field storing whether User is a Developer with site-wide access.

  is_developer = db.BooleanProperty(

      verbose_name=ugettext_lazy('Is Developer'))

  is_developer.help_text = ugettext_lazy(

      'Field used to indicate user with site-wide "Developer" access.')