#!/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.

"""Module with rights related methods.

"""

__authors__ = [

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

  ]

from soc.logic import dicts

class Checker(object):

  """Checker class that maps from prefix and status to membership.

  """

  SITE_MEMBERSHIP = {

      'admin': [],

      'restricted': ['host'],

      'member': ['user'],

      'list': [],

      }

  CLUB_MEMBERSHIP = {

      'admin': ['host', 'club_admin'],

      'restricted': ['host', 'club_admin'],

      'member': ['host', 'club_admin', 'club_member'],

      'list': ['host', 'club_admin', 'club_member'],

      }

  SPONSOR_MEMBERSHIP = {

      'admin': ['host'],

      'restricted': ['host'],

      'member': ['host'],

      'list': ['host'],

      }

  PROGRAM_MEMBERSHIP = {

      'admin': ['host'],

      'restricted': ['host', 'org_admin'],

      'member': ['host', 'org_admin', 'org_mentor', 'org_student'],

      'list': ['host', 'org_admin', 'org_mentor'],

      }

  ORGANIZATION_MEMBERSHIP = {

      'admin': ['host', 'org_admin'],

      'restricted': ['host', 'org_admin', 'org_mentor'],

      'member': ['host', 'org_admin', 'org_mentor', 'org_student'],

      'list': ['host', 'org_admin', 'org_mentor'],

      }

  USER_MEMBERSHIP = {

      'admin': ['user_self'],

      'restricted': ['user_self'], # ,'friends'

      'member': ['user'],

      'list': ['user_self'],

      }

  RIGHTS = {

      'site': SITE_MEMBERSHIP,

      'club': CLUB_MEMBERSHIP,

      'sponsor': SPONSOR_MEMBERSHIP,

      'program': PROGRAM_MEMBERSHIP,

      'org': ORGANIZATION_MEMBERSHIP,

      'user': USER_MEMBERSHIP,

      }

  def __init__(self, prefix):

    """Constructs a Checker for the specified prefix.

    """

    self.prefix = prefix

    self.rights = self.RIGHTS[prefix]

  def getMembership(self, status):

    """Retrieves the membership list for the specified status.

    """

    if status == 'user':

      return ['user']

    if status == 'public':

      return ['anyone']

    return self.rights[status]

  def getMemberships(self):

    """Returns all memberships for the configured prefix.

    """

    extra_rights = {

        'user': ['user'],

        'public': ['anyone'],

        'list': [],

        }

    return dicts.merge(extra_rights, self.rights)