#!/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 Proposal Model."""

__authors__ = [

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

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

]

from google.appengine.ext import db

from django.utils.translation import ugettext_lazy

import soc.models.work

import soc.models.quiz

import soc.models.response

class Proposal(soc.models.work.Work):

  """Model of a Proposal, which is a specific form of a Work.

  The specific way that the properties and relations inherited from Work

  are used with a Proposal are described below.

    work.title:  the title of the Proposal

    work.reviews:  reviews of the Proposal by Reviewers

    work.content:  the details of the Proposal; which, unlike work.abstract

      is considered "public" information, the contents of a Proposal are only

      displayed to Persons in Roles that have a "need to know" those details.

  A Proposal entity participates in the following relationships implemented 

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

  tasks)  an optional 1:many relationship of Task entities using the

    Proposal as their foundation.  This relation is implemented as the

    'tasks' back-reference Query of the Task model 'proposal' reference.

  """

  #: optional, indexed plain text field used for different purposes,

  #: depending on the specific type of the work

  abstract = db.StringProperty(multiline=True)

  abstract.help_text = ugettext_lazy(

      'short abstract, summary, or snippet;'

      ' 500 characters or less, plain text displayed publicly')

  #: an optional many:1 relationship between Proposal and a Quiz that

  #: defines what Questions were added by the prospective Proposal Reviewer

  #: for the Proposal author to answer.

  quiz = db.ReferenceProperty(reference_class=soc.models.quiz.Quiz,

                              required=False, collection_name="proposals")

  #: an optional 1:1 relationship where a Proposal author's Answers to

  #: a Quiz attached to the Proposal template by the Proposal Reviewer

  #; are collected. 

  response = db.ReferenceProperty(

      reference_class=soc.models.response.Response, required=False,

      collection_name="proposal")