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

  • Committer: William Grant
  • Date: 2009-03-01 23:37:33 UTC
  • Revision ID: grantw@unimelb.edu.au-20090301233733-8nehz80rdgf5653u
Move the group management listing logic onto the server side, in a template.

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ivle/webapp/admin/subject.py
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# A sample / testing application for IVLE.
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import os
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import os.path
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import urllib
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import urlparse
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import cgi
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from storm.locals import Desc
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import genshi
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from genshi.filters import HTMLFormFiller
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from genshi.template import Context, TemplateLoader
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import formencode
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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, Semester, Offering, Enrolment, User,\
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                          ProjectSet, Project, ProjectSubmission
 
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from ivle.database import Subject, Semester
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from ivle import util
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import ivle.date
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from ivle.webapp.admin.projectservice import ProjectSetRESTView,\
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                                             ProjectRESTView
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from ivle.webapp.admin.offeringservice import OfferingRESTView
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class SubjectsView(XHTMLView):
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    '''The view of the list of subjects.'''
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    template = 'templates/subjects.html'
 
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    template = 'subjects.html'
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    tab = 'subjects'
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    def authorize(self, req):
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            if enrolments.count():
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                ctx['semesters'].append((semester, enrolments))
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class UserValidator(formencode.FancyValidator):
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    """A FormEncode validator that turns a username into a user.
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    The state must have a 'store' attribute, which is the Storm store
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    to use."""
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    def _to_python(self, value, state):
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        user = User.get_by_login(state.store, value)
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        if user:
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            return user
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        else:
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            raise formencode.Invalid('User does not exist', value, state)
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class NoEnrolmentValidator(formencode.FancyValidator):
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    """A FormEncode validator that ensures absence of an enrolment.
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    The state must have an 'offering' attribute.
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    """
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    def _to_python(self, value, state):
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        if state.offering.get_enrolment(value):
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            raise formencode.Invalid('User already enrolled', value, state)
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        return value
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class EnrolSchema(formencode.Schema):
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    user = formencode.All(NoEnrolmentValidator(), UserValidator())
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class EnrolView(XHTMLView):
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    """A form to enrol a user in an offering."""
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    template = 'templates/enrol.html'
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    tab = 'subjects'
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    permission = 'edit'
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    def __init__(self, req, subject, year, semester):
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        """Find the given offering by subject, year and semester."""
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        self.context = req.store.find(Offering,
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            Offering.subject_id == Subject.id,
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            Subject.short_name == subject,
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            Offering.semester_id == Semester.id,
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            Semester.year == year,
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            Semester.semester == semester).one()
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        if not self.context:
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            raise NotFound()
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    def filter(self, stream, ctx):
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        return stream | HTMLFormFiller(data=ctx['data'])
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    def populate(self, req, ctx):
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        if req.method == 'POST':
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            data = dict(req.get_fieldstorage())
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            try:
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                validator = EnrolSchema()
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                req.offering = self.context # XXX: Getting into state.
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                data = validator.to_python(data, state=req)
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                self.context.enrol(data['user'])
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                req.store.commit()
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                req.throw_redirect(req.uri)
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            except formencode.Invalid, e:
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                errors = e.unpack_errors()
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        else:
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            data = {}
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            errors = {}
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        ctx['data'] = data or {}
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        ctx['offering'] = self.context
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        ctx['errors'] = errors
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class OfferingProjectsView(XHTMLView):
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    """View the projects for an offering."""
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    template = 'templates/offering_projects.html'
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    permission = 'edit'
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    tab = 'subjects'
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    def __init__(self, req, subject, year, semester):
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        self.context = req.store.find(Offering,
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            Offering.subject_id == Subject.id,
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            Subject.short_name == subject,
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            Offering.semester_id == Semester.id,
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            Semester.year == year,
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            Semester.semester == semester).one()
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        if not self.context:
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            raise NotFound()
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    def project_url(self, projectset, project):
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        return "/subjects/%s/%s/%s/+projects/%s" % (
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                    self.context.subject.short_name,
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                    self.context.semester.year,
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                    self.context.semester.semester,
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                    project.short_name
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                    )
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    def new_project_url(self, projectset):
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        return "/api/subjects/" + self.context.subject.short_name + "/" +\
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                self.context.semester.year + "/" + \
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                self.context.semester.semester + "/+projectsets/" +\
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                str(projectset.id) + "/+projects/+new"
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    def populate(self, req, ctx):
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        self.plugin_styles[Plugin] = ["project.css"]
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        self.plugin_scripts[Plugin] = ["project.js"]
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        ctx['offering'] = self.context
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        ctx['projectsets'] = []
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        #Open the projectset Fragment, and render it for inclusion
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        #into the ProjectSets page
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        #XXX: This could be a lot cleaner
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        loader = genshi.template.TemplateLoader(".", auto_reload=True)
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        set_fragment = os.path.join(os.path.dirname(__file__),
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                "templates/projectset_fragment.html")
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        project_fragment = os.path.join(os.path.dirname(__file__),
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                "templates/project_fragment.html")
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        for projectset in self.context.project_sets:
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            settmpl = loader.load(set_fragment)
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            setCtx = Context()
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            setCtx['projectset'] = projectset
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            setCtx['new_project_url'] = self.new_project_url(projectset)
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            setCtx['projects'] = []
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            for project in projectset.projects:
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                projecttmpl = loader.load(project_fragment)
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                projectCtx = Context()
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                projectCtx['project'] = project
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                projectCtx['project_url'] = self.project_url(projectset, project)
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                setCtx['projects'].append(
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                        projecttmpl.generate(projectCtx))
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            ctx['projectsets'].append(settmpl.generate(setCtx))
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class ProjectView(XHTMLView):
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    """View the submissions for a ProjectSet"""
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    template = "templates/project.html"
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    permission = "edit"
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    tab = 'subjects'
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    def __init__(self, req, subject, year, semester, project):
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        self.context = req.store.find(Project,
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                Project.short_name == project,
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                Project.project_set_id == ProjectSet.id,
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                ProjectSet.offering_id == Offering.id,
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                Offering.semester_id == Semester.id,
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                Semester.year == year,
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                Semester.semester == semester,
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                Offering.subject_id == Subject.id,
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                Subject.short_name == subject).one()
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        if self.context is None:
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            raise NotFound()
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    def build_subversion_url(self, svnroot, submission):
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        princ = submission.assessed.principal
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        if isinstance(princ, User):
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            path = 'users/%s' % princ.login
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        else:
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            path = 'groups/%s_%s_%s_%s' % (
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                    princ.project_set.offering.subject.short_name,
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                    princ.project_set.offering.semester.year,
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                    princ.project_set.offering.semester.semester,
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                    princ.name
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                    )
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        return urlparse.urljoin(
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                    svnroot,
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                    os.path.join(path, submission.path[1:] if
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                                       submission.path.startswith(os.sep) else
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                                       submission.path))
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    def populate(self, req, ctx):
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        self.plugin_styles[Plugin] = ["project.css"]
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        ctx['format_datetime_short'] = ivle.date.format_datetime_for_paragraph
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        ctx['build_subversion_url'] = self.build_subversion_url
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        ctx['svn_addr'] = req.config['urls']['svn_addr']
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        ctx['project'] = self.context
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        ctx['user'] = req.user
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class Plugin(ViewPlugin, MediaPlugin):
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    urls = [
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        ('subjects/', SubjectsView),
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        ('subjects/:subject/:year/:semester/+enrolments/+new', EnrolView),
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        ('subjects/:subject/:year/:semester/+projects', OfferingProjectsView),
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        ('subjects/:subject/:year/:semester/+projects/:project', ProjectView),
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        #API Views
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        ('api/subjects/:subject/:year/:semester/+projectsets/+new',
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            OfferingRESTView),
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        ('api/subjects/:subject/:year/:semester/+projectsets/:projectset/+projects/+new',
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            ProjectSetRESTView),
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        ('api/subjects/:subject/:year/:semester/+projects/:project', 
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            ProjectRESTView),
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    ]
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    tabs = [