source: main/waeup.kofa/branches/uli-rm-bootstrap/src/waeup/kofa/students/dynamicroles.py @ 16536

Last change on this file since 16536 was 11254, checked in by uli, 11 years ago

Merge changes from uli-diazo-themed back into trunk. If this works, then a miracle happened.

  • Property svn:keywords set to Id
File size: 5.3 KB
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1## $Id: dynamicroles.py 11254 2014-02-22 15:46:03Z uli $
2##
3## Copyright (C) 2011 Uli Fouquet & Henrik Bettermann
4## This program is free software; you can redistribute it and/or modify
5## it under the terms of the GNU General Public License as published by
6## the Free Software Foundation; either version 2 of the License, or
7## (at your option) any later version.
8##
9## This program is distributed in the hope that it will be useful,
10## but WITHOUT ANY WARRANTY; without even the implied warranty of
11## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12## GNU General Public License for more details.
13##
14## You should have received a copy of the GNU General Public License
15## along with this program; if not, write to the Free Software
16## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17##
18"""Security policy components for students.
19
20Students need special security policy treatment, as officers with
21local roles for departments and faculties might have additional
22permissions (local roles on depts/faculties) here.
23"""
24import grok
25from zope.securitypolicy.interfaces import IPrincipalRoleManager
26from zope.securitypolicy.principalpermission import (
27    AnnotationPrincipalPermissionManager,)
28from zope.securitypolicy.principalrole import AnnotationPrincipalRoleManager
29from waeup.kofa.students.interfaces import IStudent
30
31class StudentPrincipalRoleManager(AnnotationPrincipalRoleManager,
32                                    grok.Adapter):
33    grok.provides(IPrincipalRoleManager)
34    grok.context(IStudent)
35
36    #: The attribute name to lookup for additional roles
37    extra_attrib = 'certificate'
38    subcontainer = 'studycourse'
39
40    # Role name mapping:
41    # role name to look for in `extra_attrib` and parents
42    # to
43    # role to add in case this role was found
44    rolename_mapping = {
45        'waeup.local.ClearanceOfficer':'waeup.StudentsClearanceOfficer',
46        'waeup.local.LocalStudentsManager': 'waeup.StudentsManager',
47        'waeup.local.LocalWorkflowManager': 'waeup.WorkflowManager',
48        }
49
50    def getRolesForPrincipal(self, principal_id):
51        """Get roles for principal with id `principal_id`.
52
53        See waeup.kofa.applicants.dynamicroles.ApplicantPrincipalRoleManager
54        for further information.
55        """
56        apr_manager = AnnotationPrincipalRoleManager(self._context)
57        result = apr_manager.getRolesForPrincipal(principal_id)
58        if result != []:
59            # If there are local roles defined here, no additional
60            # lookup is done.
61            return result
62        # The principal has no local roles yet. Let's lookup the
63        # connected course, dept, etc.
64        if self.subcontainer:
65            obj = getattr(
66                self._context[self.subcontainer], self.extra_attrib, None)
67            current_level = getattr(
68                self._context[self.subcontainer], 'current_level', 0)
69        else:
70            obj = getattr(self._context, self.extra_attrib, None)
71            current_level = 0
72        # Lookup local roles for connected certificate and all parent
73        # objects. This way we fake 'role inheritance'.
74        while obj is not None:
75            extra_roles = IPrincipalRoleManager(obj).getRolesForPrincipal(
76                principal_id)
77            for role_id, setting in extra_roles:
78                if 'CourseAdviser' in role_id:
79                    # Found a Course Adviser role in external attribute or parent
80                    # thereof. We need a special treatment for Course Advisers.
81                    if current_level and str(100*(current_level/100)) in role_id:
82                        # Grant additional role, which allows to validate or reject
83                        # course lists, only if external role corresponds
84                        # with current_level of student.
85                        result.append(
86                            ('waeup.StudentsCourseAdviser', setting))
87                    else:
88                        # Otherwise grant at least view permissions.
89                        result.append(
90                            ('waeup.StudentsOfficer', setting))
91                elif 'UGClearanceOfficer' in role_id:
92                    if not self._context.is_postgrad:
93                        result.append(
94                            ('waeup.StudentsClearanceOfficer', setting))
95                    else:
96                        # Otherwise grant at least view permissions.
97                        result.append(
98                            ('waeup.StudentsOfficer', setting))
99                elif 'PGClearanceOfficer' in role_id:
100                    if self._context.is_postgrad:
101                        result.append(
102                            ('waeup.StudentsClearanceOfficer', setting))
103                    else:
104                        # Otherwise grant at least view permissions.
105                        result.append(
106                            ('waeup.StudentsOfficer', setting))
107                elif role_id in self.rolename_mapping.keys():
108                    # Grant additional role
109                    # permissions (allow, deny or unset)
110                    # according to the rolename mapping above.
111                    result.append(
112                        (self.rolename_mapping[role_id], setting))
113                    # Local roles have been found, no need to climb up further.
114                    obj = None
115            obj = getattr(obj, '__parent__', None)
116        return result
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