#!/usr/bin/python2.5

#

# Copyright 2009 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.

"""Views for Group App.

"""

__authors__ = [

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

    '"Lennard de Rijk" <ljvderijk@gmail.com>',

  ]

from django import http

from django.utils.translation import ugettext

from soc.logic import cleaning

from soc.logic import dicts

from soc.logic.helper import notifications

from soc.logic.models.group_app import logic as group_app_logic

from soc.logic.models.user import logic as user_logic

from soc.views import out_of_band

from soc.views.helper import decorators

from soc.views.helper import lists as list_helper

from soc.views.helper import redirects

from soc.views.helper import responses

from soc.views.helper import widgets

from soc.views.models import base

DEF_APPLICATION_LIST_DESCRIPTION_FMT = ugettext(

    'Overview of %(name_plural)s whose status is "%(status)s"')

class View(base.View):

  """View methods for the Group App model.

  """

  def __init__(self, params=None):

    """Defines the fields and methods required for the base View class

    to provide the user with list, public, create, edit and delete views.

    Params:

      params: a dict with params for this View

    """

    new_params = {}

    new_params['logic'] = group_app_logic

    new_params['name'] = "Group Application"

    new_params['name_short'] = "Group App"

    # use the twoline templates for these questionnaires

    new_params['create_template'] = 'soc/models/twoline_edit.html'

    new_params['edit_template'] = 'soc/models/twoline_edit.html'

    patterns = [(r'^%(url_name)s/(?P<access_type>list_self)/%(scope)s$',

        'soc.views.models.%(module_name)s.list_self',

        'List my %(name_plural)s'),

        (r'^%(url_name)s/(?P<access_type>review_overview)/%(scope)s$',

        'soc.views.models.%(module_name)s.review_overview',

        'List of %(name_plural)s for reviewing'),

        (r'^%(url_name)s/(?P<access_type>review)/%(key_fields)s$',

          'soc.views.models.%(module_name)s.review',

          'Review %(name_short)s')]

    new_params['extra_django_patterns'] = patterns

    new_params['extra_dynaexclude'] = ['applicant', 'backup_admin', 'status',

        'created_on', 'last_modified_on']

    new_params['create_dynafields'] = [

        {'name': 'backup_admin_link_id',

         'base': widgets.ReferenceField,

         'passthrough': ['reference_url', 'required', 'label'],

         'reference_url': 'user',

         'required': False,

         'label': params['logic'].getModel().backup_admin.verbose_name,

         'example_text': ugettext('The link_id of the backup admin'),

         },

         ]

    new_params['create_extra_dynaproperties'] = {

        'clean_backup_admin_link_id': 

            cleaning.clean_users_not_same('backup_admin_link_id'),

        }

    new_params['edit_extra_dynaproperties'] = {

        'clean_link_id' : cleaning.clean_link_id('link_id'),

        }

    params = dicts.merge(params, new_params, sub_merge=True)

    super(View, self).__init__(params=params)

  def _editGet(self, request, entity, form):

    """See base.View._editGet().

    """

    if entity.backup_admin:

      form.fields['backup_admin_link_id'].initial = entity.backup_admin.link_id

    super(View, self)._editGet(request, entity, form)

  def _editPost(self, request, entity, fields):

    """See base.View._editPost().

    """

    if not entity:

      # set the applicant field to the current user

      fields['applicant'] = user_logic.getForCurrentAccount()

    #set the backup_admin field with the cleaned link_id

    fields['backup_admin'] = fields['backup_admin_link_id']

    # the application has either been created or edited so

    # the status needs to be set accordingly

    fields['status'] = 'needs review'

    super(View, self)._editPost(request, entity, fields)

  def _public(self, request, entity, context):

    """See base._public().

    """

    context['entity_type_url'] = self._params['url_name']

    super(View, self)._public(request, entity, context)

  @decorators.merge_params

  @decorators.check_access

  def list(self, request, access_type,

           page_name=None, params=None, filter={}, **kwargs):

    """Lists all notifications in separate tables, depending on their status.

    for parameters see base.list()

    """

    # create the selection list

    selection = [('needs review', (redirects.getEditRedirect, params)), 

                 ('pre-accepted', (redirects.getEditRedirect, params)),

                 ('accepted', (redirects.getEditRedirect, params)),

                 ('pre-rejected', (redirects.getEditRedirect, params)),

                 ('rejected', (redirects.getEditRedirect, params)),

                 ('ignored', (redirects.getEditRedirect, params)),]

    return self._applicationListConstructor(request, params, page_name, 

        filter=filter, selection=selection, **kwargs)

  def _applicationListConstructor(self, request, params, page_name, filter={}, 

                                  selection=[], **kwargs):

    """Constructs the list containing applications for the given the arguments.

    Args:

      filter: This is the filter used for all application

      selection: This is a list containing tuples stating the status for an

        application and the redirect action.

      See base.View.public() for the rest.

    Returns:

      HTTP Response containing the list view.

    """

    contents = []

    list_params = params.copy()

    index = 0

    for status, action in selection:

      # only select the requests that have been pre-accpeted

      filter['status'] = status

      name = status[0] if isinstance(status, list) else status

      list_params['list_description'] = (

          DEF_APPLICATION_LIST_DESCRIPTION_FMT % (

          {'name_plural': params['name_plural'], 'status': name}))

      list_params['list_action'] = action

      list_content = list_helper.getListContent(

          request, list_params, filter, idx=index)

      contents += [list_content]

      index += 1

    # call the _list method from base to display the list

    if kwargs.get('context'):

      context = kwargs['context']

    else:

      context = {}

    return self._list(request, params, contents, page_name, context=context)

  @decorators.merge_params

  @decorators.check_access

  def listSelf(self, request, access_type,

             page_name=None, params=None, **kwargs):

    """List all applications from the current logged-in user.

    For params see base.View.public().

    """

    user_entity = user_logic.getForCurrentAccount()

    filter = {'applicant' : user_entity}

    if kwargs['scope_path']:

      filter['scope_path'] = kwargs['scope_path']

    # create the selection list

    selection = [(['needs review', 'pre-accepted', 'pre-rejected'],

                  (redirects.getEditRedirect, params)),

                 ('accepted', (redirects.getApplicantRedirect, 

                    {'url_name': params['group_url_name']})),

                 ('rejected', (redirects.getPublicRedirect, params))]

    return self._applicationListConstructor(request, params, page_name,

        filter=filter, selection=selection, **kwargs)

  @decorators.merge_params

  @decorators.check_access

  def review(self, request, access_type,

             page_name=None, params=None, **kwargs):

    """Handles the view containing the review of an application.

    accepted (true or false) in the GET data will mark

    the application accordingly.

    For params see base.View.public().

    """

    try:

      entity = self._logic.getFromKeyFieldsOr404(kwargs)

    except out_of_band.Error, error:

      return responses.errorResponse(

          error, request, template=params['error_public'])

    get_dict = request.GET

    # check to see if we can make a decision for this application

    if 'status' in get_dict.keys():

      status_value = get_dict['status']

      if status_value in ['accepted', 'rejected', 'ignored', 'pre-accepted',

          'pre-rejected']:

        # this application has been properly reviewed update the status

        # only update if the status changes

        if entity.status != status_value:

          fields = {'status' : status_value}

          self._logic.updateEntityProperties(entity, fields)

          self._review(request, params, entity, status_value, **kwargs)

          if status_value == 'accepted':

            # the application has been accepted send out a notification

            notifications.sendNewGroupNotification(entity, params)

        # redirect to the review overview

        fields = {'url_name': params['url_name']}

        scope_path = entity.scope_path

        if not scope_path:

          scope_path = ''

        # add scope_path to the dictionary

        fields['scope_path'] = scope_path

        return http.HttpResponseRedirect(

            '/%(url_name)s/review_overview/%(scope_path)s' %fields)

    # the application has not been reviewed so show the information

    # using the appropriate review template

    params['public_template'] = params['review_template']

    return super(View, self).public(request, access_type,

        page_name=page_name, params=params, **kwargs)

  def _review(self, request, params, app_entity, status, **kwargs):

    """Does any required post review processing.

    Args:

      request: the standard Django HTTP request object

      params: a dict with params for this View

      app_entity: The update application entity

      status: The status that was given to the reviewed app_entity

    """

    pass

  @decorators.merge_params

  @decorators.check_access

  def reviewOverview(self, request, access_type,

             page_name=None, params=None, **kwargs):

    """Displays multiple lists of applications that are in a different

    status of the application process.

    """

    selection = [('needs review', (redirects.getReviewRedirect, params)),

                 ('pre-accepted', (redirects.getReviewRedirect, params)),

                 ('accepted', (redirects.getReviewRedirect, params)),

                 ('pre-rejected', (redirects.getReviewRedirect, params)),

                 ('rejected', (redirects.getReviewRedirect, params)),

                 ('ignored', (redirects.getReviewRedirect, params)),]

    filter = {}

    if kwargs['scope_path']:

      filter['scope_path'] = kwargs['scope_path']

    return self._applicationListConstructor(request, params, page_name,

        filter=filter, selection=selection, **kwargs)