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

ivle.chat now opens /dev/null as std{in,out,err} when daemonising.

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ivle/webapp/admin/subject.py
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import urllib
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import cgi
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from common import util
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import common.db
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def handle(req):
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    """Handler for the Subjects application. Links to subject home pages."""
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    req.styles = ["media/subjects/subjects.css"]
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    if req.path == "":
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        handle_toplevel_menu(req)
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    else:
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        handle_subject_page(req, req.path)
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def handle_toplevel_menu(req):
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    # This is represented as a directory. Redirect and add a slash if it is
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    # missing.
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    if req.uri[-1] != '/':
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        req.throw_redirect(req.uri + '/')
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    # Get list of subjects
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    db = common.db.DB()
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    try:
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        enrolled_subjects = db.get_enrolment(req.user.login)
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        all_subjects = db.get_subjects()
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    finally:
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        db.close()
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    enrolled_set = set(x['subj_code'] for x in enrolled_subjects)
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    unenrolled_subjects = [x for x in all_subjects
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                           if x['subj_code'] not in enrolled_set]
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    enrolled_subjects.sort(key=lambda x: x['subj_code'])
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    unenrolled_subjects.sort(key=lambda x: x['subj_code'])
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    def print_subject(subject):
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        if subject['url'] is None:
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            req.write('  <li>%s (no home page)</li>\n'
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                % cgi.escape(subject['subj_name']))
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        else:
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            req.write('  <li><a href="%s">%s</a></li>\n'
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                % (cgi.escape(subject['url']),
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                   cgi.escape(subject['subj_name'])))
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    req.content_type = "text/html"
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    req.write_html_head_foot = True
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    req.write('<div id="ivle_padding">\n')
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    req.write("<h2>IVLE Subject Homepages</h2>\n")
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    req.write("<h2>Subjects</h2>\n<ul>\n")
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    for subject in enrolled_subjects:
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        print_subject(subject)
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    req.write("</ul>\n")
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    if len(unenrolled_subjects) > 0:
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        req.write("<h3>Other Subjects</h3>\n")
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        req.write("<p>You are not currently enrolled in these subjects</p>\n")
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        req.write("<ul>\n")
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        for subject in unenrolled_subjects:
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            print_subject(subject)
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        req.write("</ul>\n")
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    req.write("</div>\n")
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def handle_subject_page(req, path):
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    req.content_type = "text/html"
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    req.write_html_head_foot = True     # Have dispatch print head and foot
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    # Just make the iframe pointing to media/subjects
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    serve_loc = util.make_path(os.path.join('media', 'subjects', path))
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    req.write('<object class="fullscreen" type="text/html" \
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data="%s"></iframe>'% urllib.quote(serve_loc))
 
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from ivle.webapp.base.xhtml import XHTMLView
 
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from ivle.webapp.base.plugins import ViewPlugin, MediaPlugin
 
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from ivle.webapp.errors import NotFound
 
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from ivle.database import Subject
 
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from ivle import util
 
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class SubjectsView(XHTMLView):
 
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    '''The view of the list of subjects.'''
 
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    template = 'subjects.html'
 
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    appname = 'subjects' # XXX
 
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    def authorize(self, req):
 
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        return req.user is not None
 
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    def populate(self, req, ctx):
 
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        enrolled_subjects = req.user.subjects
 
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        unenrolled_subjects = [subject for subject in
 
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                               req.store.find(Subject)
 
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                               if subject not in enrolled_subjects]
 
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        ctx['enrolled_subjects'] = []
 
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        ctx['other_subjects'] = []
 
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        for subject in enrolled_subjects:
 
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            new_subj = {}
 
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            new_subj['name'] = subject.name
 
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            new_subj['url'] = subject.url
 
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            ctx['enrolled_subjects'].append(new_subj)
 
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        if len(unenrolled_subjects) > 0:
 
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            for subject in unenrolled_subjects:
 
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                new_subj = {}
 
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                new_subj['name'] = subject.name
 
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                new_subj['url'] = subject.url
 
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                ctx['other_subjects'].append(new_subj)
 
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class Plugin(ViewPlugin, MediaPlugin):
 
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    urls = [
 
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        ('subjects/', SubjectsView),
 
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    ]
 
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    tabs = [
 
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        ('subjects', 'Subjects', 'Announcements and information about the '
 
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         'subjects you are enrolled in.', 'subjects.png', 'subjects', 5)
 
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    ]
 
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    media = 'subject-media'