#!/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.

"""Functions that are useful when dealing with requests.

"""

__authors__ = [

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

  ]

import soc.logic.models as model_logic

def removeRequestForRole(role_entity):

  """Removes the request that leads to the creation of the given entity.

  Args:

    role_entity : A datastore entity that is either a role or a subclass of the role model

  """

  # get the type of the role entity using the classname

  role_type = role_entity.__class__.__name__

  # get the request logic so we can query the datastore

  request_logic = model_logic.request.logic

  # create the query properties for the specific role

  properties = {'scope' : role_entity.scope,

      'link_id' : role_entity.link_id,

      'role' : role_type.lower() }

  # get the request that complies with properties

  request_entity = request_logic.getForFields(properties, unique=True)

  # delete the request from the datastore, if there is any

  if request_entity:

    request_logic.delete(request_entity)