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−#!/usr/bin/python2.5
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−#
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−# Copyright 2008 the Melange authors.
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−#
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−# Licensed under the Apache License, Version 2.0 (the "License");
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−# you may not use this file except in compliance with the License.
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−# You may obtain a copy of the License at
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−# 
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−#   http://www.apache.org/licenses/LICENSE-2.0
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−# 
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−# Unless required by applicable law or agreed to in writing, software
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−# distributed under the License is distributed on an "AS IS" BASIS,
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−# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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−# See the License for the specific language governing permissions and
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−# limitations under the License.
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−
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−"""This module contains the Presence Model."""
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−
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−__authors__ = [
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−  '"Pawel Solyga" <pawel.solyga@gmail.com>',
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−  '"Todd Larsen" <tlarsen@google.com>',
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−]
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−
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−
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−from google.appengine.ext import db
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−
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−from django.utils.translation import ugettext_lazy
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−
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−import soc.models.document
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−import soc.models.linkable
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−
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−
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−class Presence(soc.models.linkable.Linkable):
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−  """Model for anything that has a "presence" on a Melange site.
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−
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−  A "presence" is (currently) defined as:
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−  * having a "home" page with contents set by selecting a Document
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−  * displaying an (optional) ATOM or RSS feed
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−
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−  Models that have a "presence" on a Melange web site are (currently):
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−  * any Group (Organization, Club, etc.)
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−  * any Program
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−  * the site itself, which is a singleton Presence
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−  """
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−
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−  #: Reference to Document containing the contents of the "/home" page
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−  home = db.ReferenceProperty(
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−    reference_class=soc.models.document.Document,
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−    collection_name='home')
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−  home.help_text = ugettext_lazy(
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−      'Document to be used as the "/home" page static contents.')
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−
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−  #: Valid ATOM or RSS feed url or None if unused. Feed entries are shown 
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−  #: on the site page using Google's JavaScript blog widget  
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−  feed_url = db.LinkProperty(verbose_name=ugettext_lazy('Feed URL'))
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−  feed_url.help_text = ugettext_lazy(
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−      'The URL should be a valid ATOM or RSS feed. '
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−      'Feed entries are shown on the home page.')