text: from __future__ import unicode_literals
  
  from django.utils.translation import ugettext_lazy as _
  
  from common import (
      MayanAppConfig, menu_multi_item, menu_object, menu_secondary, menu_setup
  )
  from common.signals import perform_upgrade
  from rest_api.classes import APIEndPoint
  
  from .handlers import purge_permissions
  from .models import Role
  from .links import (
      link_permission_grant, link_permission_revoke, link_role_create,
      link_role_delete, link_role_edit, link_role_list, link_role_members,
      link_role_permissions
  )
  
  
  class PermissionsApp(MayanAppConfig):
      name = 'permissions'
      test = True
      verbose_name = _('Permissions')
  
      def ready(self):
          super(PermissionsApp, self).ready()
  
          APIEndPoint(app=self, version_string='1')
  
          menu_object.bind_links(
              links=(
                  link_role_edit, link_role_members, link_role_permissions,
                  link_role_delete
              ), sources=(Role,)
          )
          menu_multi_item.bind_links(
              links=(link_permission_grant, link_permission_revoke),
              sources=('permissions:role_permissions',)
          )
          menu_secondary.bind_links(
              links=(link_role_list, link_role_create),
              sources=(Role, 'permissions:role_create', 'permissions:role_list')
          )
          menu_setup.bind_links(links=(link_role_list,))
  
          perform_upgrade.connect(
              purge_permissions, dispatch_uid='purge_permissions'
          )
  