#!/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 Presence Model."""

__authors__ = [

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

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

]

from google.appengine.ext import db

from django.utils.translation import ugettext

import soc.models.document

import soc.models.linkable

class Presence(soc.models.linkable.Linkable):

  """Model for anything that has a "presence" on a Melange site.

  A "presence" is (currently) defined as:

  * having a "home" page with contents set by selecting a Document

  * displaying an (optional) ATOM or RSS feed

  Models that have a "presence" on a Melange web site are (currently):

  * any Group (Organization, Club, etc.)

  * any Program

  * the site itself, which is a singleton Presence

  """

  #: Reference to Document containing the contents of the "/home" page

  home = db.ReferenceProperty(

    reference_class=soc.models.document.Document,

    collection_name='home')

  home.help_text = ugettext(

      'Document to be used as the "/home" page static contents.')

  #: Valid ATOM or RSS feed url or None if unused. Feed entries are shown 

  #: on the site page using Google's JavaScript blog widget  

  feed_url = db.LinkProperty(verbose_name=ugettext('Feed URL'))

  feed_url.help_text = ugettext(

      'The URL should be a valid ATOM or RSS feed. '

      'Feed entries are shown on the home page.')