Source code for waeup.kofa.students.dynamicroles

## $Id: dynamicroles.py 11254 2014-02-22 15:46:03Z uli $
## 
## Copyright (C) 2011 Uli Fouquet & Henrik Bettermann
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
## 
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
## 
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##
"""Security policy components for students.

Students need special security policy treatment, as officers with
local roles for departments and faculties might have additional
permissions (local roles on depts/faculties) here.
"""
import grok
from zope.securitypolicy.interfaces import IPrincipalRoleManager
from zope.securitypolicy.principalpermission import (
    AnnotationPrincipalPermissionManager,)
from zope.securitypolicy.principalrole import AnnotationPrincipalRoleManager
from waeup.kofa.students.interfaces import IStudent

[docs]class StudentPrincipalRoleManager(AnnotationPrincipalRoleManager, grok.Adapter): grok.provides(IPrincipalRoleManager) grok.context(IStudent) #: The attribute name to lookup for additional roles extra_attrib = 'certificate' subcontainer = 'studycourse' # Role name mapping: # role name to look for in `extra_attrib` and parents # to # role to add in case this role was found rolename_mapping = { 'waeup.local.ClearanceOfficer':'waeup.StudentsClearanceOfficer', 'waeup.local.LocalStudentsManager': 'waeup.StudentsManager', 'waeup.local.LocalWorkflowManager': 'waeup.WorkflowManager', }
[docs] def getRolesForPrincipal(self, principal_id): """Get roles for principal with id `principal_id`. See waeup.kofa.applicants.dynamicroles.ApplicantPrincipalRoleManager for further information. """ apr_manager = AnnotationPrincipalRoleManager(self._context) result = apr_manager.getRolesForPrincipal(principal_id) if result != []: # If there are local roles defined here, no additional # lookup is done. return result # The principal has no local roles yet. Let's lookup the # connected course, dept, etc. if self.subcontainer: obj = getattr( self._context[self.subcontainer], self.extra_attrib, None) current_level = getattr( self._context[self.subcontainer], 'current_level', 0) else: obj = getattr(self._context, self.extra_attrib, None) current_level = 0 # Lookup local roles for connected certificate and all parent # objects. This way we fake 'role inheritance'. while obj is not None: extra_roles = IPrincipalRoleManager(obj).getRolesForPrincipal( principal_id) for role_id, setting in extra_roles: if 'CourseAdviser' in role_id: # Found a Course Adviser role in external attribute or parent # thereof. We need a special treatment for Course Advisers. if current_level and str(100*(current_level/100)) in role_id: # Grant additional role, which allows to validate or reject # course lists, only if external role corresponds # with current_level of student. result.append( ('waeup.StudentsCourseAdviser', setting)) else: # Otherwise grant at least view permissions. result.append( ('waeup.StudentsOfficer', setting)) elif 'UGClearanceOfficer' in role_id: if not self._context.is_postgrad: result.append( ('waeup.StudentsClearanceOfficer', setting)) else: # Otherwise grant at least view permissions. result.append( ('waeup.StudentsOfficer', setting)) elif 'PGClearanceOfficer' in role_id: if self._context.is_postgrad: result.append( ('waeup.StudentsClearanceOfficer', setting)) else: # Otherwise grant at least view permissions. result.append( ('waeup.StudentsOfficer', setting)) elif role_id in self.rolename_mapping.keys(): # Grant additional role # permissions (allow, deny or unset) # according to the rolename mapping above. result.append( (self.rolename_mapping[role_id], setting)) # Local roles have been found, no need to climb up further. obj = None obj = getattr(obj, '__parent__', None) return result