← Back to branch summary

~azzar1/unity/add-show-desktop-key

« back to all changes in this revision

Viewing changes to ivle/webapp/admin/subject.py

  • Committer: William Grant
  • Date: 2009-03-25 11:03:05 UTC
  • Revision ID: grantw@unimelb.edu.au-20090325110305-bdfuuqjpion1oc8i
Rename length to len in specialhome.js to please IE8.

Show diffs side-by-side

added added

removed removed

Lines of Context:
ivle/webapp/admin/subject.py
26
26
import urllib
27
27
import cgi
28
28
 
29
 
from common import util
30
 
import common.db
31
 
 
32
 
def handle(req):
33
 
    """Handler for the Subjects application. Links to subject home pages."""
34
 
 
35
 
    req.styles = ["media/subjects/subjects.css"]
36
 
    if req.path == "":
37
 
        handle_toplevel_menu(req)
38
 
    else:
39
 
        handle_subject_page(req, req.path)
40
 
 
41
 
def handle_toplevel_menu(req):
42
 
    # This is represented as a directory. Redirect and add a slash if it is
43
 
    # missing.
44
 
    if req.uri[-1] != '/':
45
 
        req.throw_redirect(req.uri + '/')
46
 
 
47
 
    (enrolled_subjects, unenrolled_subjects) = \
48
 
              common.db.DB().get_subjects_status(req.user.login)
49
 
 
50
 
    def print_subject(subject):
51
 
        if subject['url'] is None:
52
 
            req.write('  <li>%s (no home page)</li>\n'
53
 
                % cgi.escape(subject['subj_name']))
54
 
        else:
55
 
            req.write('  <li><a href="%s">%s</a></li>\n'
56
 
                % (cgi.escape(subject['url']),
57
 
                   cgi.escape(subject['subj_name'])))
58
 
 
59
 
    req.content_type = "text/html"
60
 
    req.write_html_head_foot = True
61
 
    req.write('<div id="ivle_padding">\n')
62
 
    req.write("<h2>IVLE Subject Homepages</h2>\n")
63
 
    req.write("<h2>Subjects</h2>\n<ul>\n")
64
 
    for subject in enrolled_subjects:
65
 
        print_subject(subject)
66
 
    req.write("</ul>\n")
67
 
    if len(unenrolled_subjects) > 0:
68
 
        req.write("<h3>Other Subjects</h3>\n")
69
 
        req.write("<p>You are not currently enrolled in these subjects</p>\n")
70
 
        req.write("<ul>\n")
71
 
        for subject in unenrolled_subjects:
72
 
            print_subject(subject)
73
 
        req.write("</ul>\n")
74
 
    req.write("</div>\n")
75
 
 
76
 
def handle_subject_page(req, path):
77
 
    req.content_type = "text/html"
78
 
    req.write_html_head_foot = True     # Have dispatch print head and foot
79
 
 
80
 
    # Just make the iframe pointing to media/subjects
81
 
    serve_loc = util.make_path(os.path.join('media', 'subjects', path))
82
 
    req.write('<object class="fullscreen" type="text/html" \
83
 
data="%s"></iframe>'% urllib.quote(serve_loc))
 
29
from storm.locals import Desc
 
30
from genshi.filters import HTMLFormFiller
 
31
import formencode
 
32
 
 
33
from ivle.webapp.base.xhtml import XHTMLView
 
34
from ivle.webapp.base.plugins import ViewPlugin, MediaPlugin
 
35
from ivle.webapp.errors import NotFound
 
36
from ivle.database import Subject, Semester, Offering, Enrolment, User
 
37
from ivle import util
 
38
 
 
39
 
 
40
class SubjectsView(XHTMLView):
 
41
    '''The view of the list of subjects.'''
 
42
    template = 'subjects.html'
 
43
    tab = 'subjects'
 
44
 
 
45
    def authorize(self, req):
 
46
        return req.user is not None
 
47
 
 
48
    def populate(self, req, ctx):
 
49
        ctx['user'] = req.user
 
50
        ctx['semesters'] = []
 
51
        for semester in req.store.find(Semester).order_by(Desc(Semester.year),
 
52
                                                     Desc(Semester.semester)):
 
53
            enrolments = semester.enrolments.find(user=req.user)
 
54
            if enrolments.count():
 
55
                ctx['semesters'].append((semester, enrolments))
 
56
 
 
57
 
 
58
class UserValidator(formencode.FancyValidator):
 
59
    """A FormEncode validator that turns a username into a user.
 
60
 
 
61
    The state must have a 'store' attribute, which is the Storm store
 
62
    to use."""
 
63
    def _to_python(self, value, state):
 
64
        user = User.get_by_login(state.store, value)
 
65
        if user:
 
66
            return user
 
67
        else:
 
68
            raise formencode.Invalid('User does not exist', value, state)
 
69
 
 
70
 
 
71
class NoEnrolmentValidator(formencode.FancyValidator):
 
72
    """A FormEncode validator that ensures absence of an enrolment.
 
73
 
 
74
    The state must have an 'offering' attribute.
 
75
    """
 
76
    def _to_python(self, value, state):
 
77
        if state.offering.get_enrolment(value):
 
78
            raise formencode.Invalid('User already enrolled', value, state)
 
79
        return value
 
80
 
 
81
 
 
82
class EnrolSchema(formencode.Schema):
 
83
    user = formencode.All(NoEnrolmentValidator(), UserValidator())
 
84
 
 
85
 
 
86
class EnrolView(XHTMLView):
 
87
    """A form to enrol a user in an offering."""
 
88
    template = 'enrol.html'
 
89
    tab = 'subjects'
 
90
    permission = 'edit'
 
91
 
 
92
    def __init__(self, req, subject, year, semester):
 
93
        """Find the given offering by subject, year and semester."""
 
94
        self.context = req.store.find(Offering,
 
95
            Offering.subject_id == Subject.id,
 
96
            Subject.short_name == subject,
 
97
            Offering.semester_id == Semester.id,
 
98
            Semester.year == year,
 
99
            Semester.semester == semester).one()
 
100
 
 
101
        if not self.context:
 
102
            raise NotFound()
 
103
 
 
104
    def filter(self, stream, ctx):
 
105
        return stream | HTMLFormFiller(data=ctx['data'])
 
106
 
 
107
    def populate(self, req, ctx):
 
108
        if req.method == 'POST':
 
109
            data = dict(req.get_fieldstorage())
 
110
            try:
 
111
                validator = EnrolSchema()
 
112
                req.offering = self.context # XXX: Getting into state.
 
113
                data = validator.to_python(data, state=req)
 
114
                self.context.enrol(data['user'])
 
115
                req.store.commit()
 
116
                req.throw_redirect(req.uri)
 
117
            except formencode.Invalid, e:
 
118
                errors = e.unpack_errors()
 
119
        else:
 
120
            data = {}
 
121
            errors = {}
 
122
 
 
123
        ctx['data'] = data or {}
 
124
        ctx['offering'] = self.context
 
125
        ctx['errors'] = errors
 
126
 
 
127
 
 
128
class Plugin(ViewPlugin, MediaPlugin):
 
129
    urls = [
 
130
        ('subjects/', SubjectsView),
 
131
        ('subjects/:subject/:year/:semester/+enrolments/+new', EnrolView),
 
132
    ]
 
133
 
 
134
    tabs = [
 
135
        ('subjects', 'Subjects',
 
136
         'View subject content and complete worksheets',
 
137
         'subjects.png', 'subjects', 5)
 
138
    ]
 
139
 
 
140
    media = 'subject-media'