1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
# IVLE - Informatics Virtual Learning Environment
# Copyright (C) 2007-2008 The University of Melbourne
#
# 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# Module: Subject Pulldown
# Author: Matt Giuca
# Date: 7/7/2008
# Pluggable subject pulldown module.
# Grabs a student's subject list from a source specified in conf.py.
# Each module should have a get_subjects(login) function, which takes login
# and returns a list of (subject, semester) pairs (both strings), or None
# if the user can't be found. May also raise a SubjectError which is fatal.
import os
import sys
from subjecterror import SubjectError
import conf
def get_subjects(login):
"""
Looks up the student in whatever modules are available, using login.
If successful, returns a list of (subject, semester) pairs (both strings).
Raises a SubjectError if unsuccessful.
"""
for modname, m in subj_modules:
result = m(login)
if result is not None:
return result
return []
# Allow imports to get files from this directory.
# Get the directory that this module (authenticate) is in
plugpath = os.path.split(sys.modules[__name__].__file__)[0]
# Add it to sys.path
sys.path.append(plugpath)
# Create a global variable "subj_modules", a list of (name, function object)s.
# This list consists of null_subj, plus the "get_subject" functions of all the
# plugin subject pulldown modules.
subj_modules = []
for modname in conf.subject_pulldown_modules.split(','):
try:
mod = __import__(modname)
except ImportError:
raise SubjectError("Internal error: "
"Can't import subject pulldown module %s"
% repr(modname))
except ValueError:
# If auth_modules is "", we may get an empty string - ignore
continue
try:
subjfunc = mod.get_subjects
except AttributeError:
raise SubjectError("Internal error: Subject pulldown module %r has no "
"'get_subjects' function" % modname)
subj_modules.append((modname, subjfunc))
|