#!/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 Work Model."""

__authors__ = [

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

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

]

from google.appengine.ext import db

from django.utils.translation import ugettext_lazy

import soc.models.linkable

import soc.models.user

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

  """Model of a Work created by one or more Persons in Roles.

  Work is a "base entity" of other more specific "works" created by Persons

  serving in "roles".

    reviews)  a 1:many relationship between a Work and the zero or more

      Reviews of that Work.  This relation is implemented as the 'reviews'

      back-reference Query of the Review model 'reviewed' reference.

  """

  #: Required 1:1 relationship indicating the User who initially authored the

  #: Work (this relationship is needed to keep track of lifetime document

  #: creation limits, used to prevent spamming, etc.).

  author = db.ReferenceProperty(reference_class=soc.models.user.User,

                                required=True,

                                collection_name="created_documents",

                                verbose_name=ugettext_lazy('Created by'))

  #: Required field indicating the "title" of the work, which may have

  #: different uses depending on the specific type of the work. Works

  #: can be indexed, filtered, and sorted by 'title'.

  title = db.StringProperty(required=True,

      verbose_name=ugettext_lazy('Title'))

  title.help_text = ugettext_lazy(

      'title of the document; often used in the window title')

  #: short name used in places such as the sidebar menu and breadcrumb trail

  #: (optional: title will be used if short_name is not present)

  short_name = db.StringProperty(verbose_name=ugettext_lazy('Short name'))

  short_name.help_text = ugettext_lazy(

      'short name used, for example, in the sidebar menu')

  #: Required db.TextProperty containing the contents of the Work.

  #: The content is only to be displayed to Persons in Roles eligible to

  #: view them (which may be anyone, for example, with the site front page).

  content = db.TextProperty(verbose_name=ugettext_lazy('Content'))

  #: date when the work was created

  created = db.DateTimeProperty(auto_now_add=True)

  #: date when the work was last modified

  modified = db.DateTimeProperty(auto_now=True)

  # indicating wich user last modified the work. Used in displaying Work

  modified_by = db.ReferenceProperty(reference_class=soc.models.user.User,

                                     required=True,

                                     collection_name="modified_documents",

                                     verbose_name=ugettext_lazy('Modified by'))

  # TODO: some sort of access control preferences are needed at this basic

  #   level.  Works need to be restrict-able to:

  #    * the authors only

  #    * the administrators of the Groups that the authors are in

  #    * any member of the authors' Groups

  #    * logged-in User with a profile

  #    * logged-in Users, but no profile is necessary

  #    * anyone, even those not logged in

  #  (and possibly others)

  #: field storing whether a link to the Work should be featured in

  #: the sidebar menu (and possibly elsewhere); FAQs, Terms of Service,

  #: and the like are examples of "featured" Works

  is_featured = db.BooleanProperty(

      verbose_name=ugettext_lazy('Is Featured'))

  is_featured.help_text = ugettext_lazy(

      'Field used to indicate if a Work should be featured, for example,'

      ' in the sidebar menu.')

  def name(self):

    """Alias 'title' Property as 'name' for use in common templates.

    """

    return self.title