app/summerofcode/request/access.py

# Copyright 2014 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.

"""Classes for checking access to Summer Of Code-specific pages."""

from melange.request import access as melange_access
from melange.request import exception


class StudentsAnnouncedAccessChecker(melange_access.AccessChecker):
  """AccessChecker that ensures that accepted students have been announced
  for the program specified in the URL.
  """

  def checkAccess(self, data, check):
    """See AccessChecker.checkAccess for specification."""
    if not data.timeline.studentsAnnounced():
      active_from = data.timeline.studentsAnnouncedOn()
      raise exception.Forbidden(
          message=melange_access._MESSAGE_INACTIVE_BEFORE % active_from)

STUDENTS_ANNOUNCED_ACCESS_CHECKER = StudentsAnnouncedAccessChecker()


class BeforeStudentsAnnouncedAccessChecker(melange_access.AccessChecker):
  """AccessChecker that ensures that accepted students have not been announced
  for the program specified in the URL.
  """

  def checkAccess(self, data, check):
    """See AccessChecker.checkAccess for specification."""
    if data.timeline.studentsAnnounced():
      active_before = data.timeline.studentsAnnouncedOn()
      raise exception.Forbidden(
          message=melange_access._MESSAGE_INACTIVE_AFTER % active_before)

BEFORE_STUDENTS_ANNOUNECD_ACCESS_CHECKER = (
    BeforeStudentsAnnouncedAccessChecker())