300 lines
11 KiB
Python
300 lines
11 KiB
Python
import json
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import logging
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import urllib
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import itertools
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from django.conf import settings
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from django.core.context_processors import csrf
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from django.core.urlresolvers import reverse
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from django.contrib.auth.models import User
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from django.contrib.auth.decorators import login_required
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from django.http import Http404, HttpResponse
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from django.shortcuts import redirect
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from mitxmako.shortcuts import render_to_response, render_to_string
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#from django.views.decorators.csrf import ensure_csrf_cookie
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from django_future.csrf import ensure_csrf_cookie
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from django.views.decorators.cache import cache_control
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from module_render import toc_for_course, get_module, get_section
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from models import StudentModuleCache
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from student.models import UserProfile
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from xmodule.modulestore import Location
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from xmodule.modulestore.search import path_to_location
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from xmodule.modulestore.exceptions import InvalidLocationError, ItemNotFoundError, NoPathToItem
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from xmodule.modulestore.django import modulestore
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from xmodule.course_module import CourseDescriptor
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from util.cache import cache, cache_if_anonymous
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from student.models import UserTestGroup, CourseEnrollment
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from courseware import grades
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from courseware.courses import (check_course, get_courses_by_university,
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has_staff_access_to_course)
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log = logging.getLogger("mitx.courseware")
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template_imports = {'urllib': urllib}
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def user_groups(user):
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if not user.is_authenticated():
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return []
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# TODO: Rewrite in Django
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key = 'user_group_names_{user.id}'.format(user=user)
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cache_expiration = 60 * 60 # one hour
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# Kill caching on dev machines -- we switch groups a lot
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group_names = cache.get(key)
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if settings.DEBUG:
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group_names = None
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if group_names is None:
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group_names = [u.name for u in UserTestGroup.objects.filter(users=user)]
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cache.set(key, group_names, cache_expiration)
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return group_names
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@ensure_csrf_cookie
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@cache_if_anonymous
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def courses(request):
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'''
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Render "find courses" page. The course selection work is done in courseware.courses.
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'''
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universities = get_courses_by_university(request.user)
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return render_to_response("courses.html", {'universities': universities})
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@cache_control(no_cache=True, no_store=True, must_revalidate=True)
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def gradebook(request, course_id):
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if 'course_admin' not in user_groups(request.user):
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raise Http404
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course = check_course(course_id)
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enrolled_students = User.objects.filter(courseenrollment__course_id=course_id).order_by('username')
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# TODO (vshnayder): implement pagination.
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enrolled_students = enrolled_students[:1000] # HACK!
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student_info = [{'username': student.username,
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'id': student.id,
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'email': student.email,
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'grade_summary': grades.grade(student, request, course),
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'realname': UserProfile.objects.get(user=student).name
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}
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for student in enrolled_students]
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return render_to_response('gradebook.html', {'students': student_info, 'course': course})
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@login_required
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@cache_control(no_cache=True, no_store=True, must_revalidate=True)
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def profile(request, course_id, student_id=None):
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''' User profile. Show username, location, etc, as well as grades .
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We need to allow the user to change some of these settings .'''
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course = check_course(course_id)
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if student_id is None:
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student = request.user
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else:
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if 'course_admin' not in user_groups(request.user):
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raise Http404
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student = User.objects.get(id=int(student_id))
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user_info = UserProfile.objects.get(user=student)
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student_module_cache = StudentModuleCache.cache_for_descriptor_descendents(request.user, course)
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course_module = get_module(request.user, request, course.location, student_module_cache)
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courseware_summary = grades.progress_summary(student, course_module, course.grader, student_module_cache)
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grade_summary = grades.grade(request.user, request, course, student_module_cache)
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context = {'name': user_info.name,
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'username': student.username,
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'location': user_info.location,
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'language': user_info.language,
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'email': student.email,
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'course': course,
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'csrf': csrf(request)['csrf_token'],
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'courseware_summary' : courseware_summary,
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'grade_summary' : grade_summary
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}
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context.update()
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return render_to_response('profile.html', context)
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def render_accordion(request, course, chapter, section):
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''' Draws navigation bar. Takes current position in accordion as
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parameter.
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If chapter and section are '' or None, renders a default accordion.
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course, chapter, and section are the url_names.
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Returns the html string'''
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# grab the table of contents
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toc = toc_for_course(request.user, request, course, chapter, section)
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context = dict([('toc', toc),
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('course_id', course.id),
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('csrf', csrf(request)['csrf_token'])] + template_imports.items())
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return render_to_string('accordion.html', context)
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@login_required
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@ensure_csrf_cookie
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@cache_control(no_cache=True, no_store=True, must_revalidate=True)
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def index(request, course_id, chapter=None, section=None,
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position=None):
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''' Displays courseware accordion, and any associated content.
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If course, chapter, and section aren't all specified, just returns
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the accordion. If they are specified, returns an error if they don't
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point to a valid module.
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Arguments:
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- request : HTTP request
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- course_id : course id (str: ORG/course/URL_NAME)
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- chapter : chapter url_name (str)
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- section : section url_name (str)
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- position : position in module, eg of <sequential> module (str)
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Returns:
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- HTTPresponse
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'''
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course = check_course(course_id)
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registered = registered_for_course(course, request.user)
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if not registered:
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log.debug('User %s tried to view course %s but is not enrolled' % (request.user,course.location.url()))
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return redirect(reverse('about_course', args=[course.id]))
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try:
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context = {
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'csrf': csrf(request)['csrf_token'],
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'accordion': render_accordion(request, course, chapter, section),
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'COURSE_TITLE': course.title,
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'course': course,
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'init': '',
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'content': ''
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}
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look_for_module = chapter is not None and section is not None
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if look_for_module:
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section_descriptor = get_section(course, chapter, section)
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if section_descriptor is not None:
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student_module_cache = StudentModuleCache.cache_for_descriptor_descendents(
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request.user,
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section_descriptor)
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module = get_module(request.user, request,
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section_descriptor.location,
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student_module_cache)
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context['content'] = module.get_html()
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else:
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log.warning("Couldn't find a section descriptor for course_id '{0}',"
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"chapter '{1}', section '{2}'".format(
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course_id, chapter, section))
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else:
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if request.user.is_staff:
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# Add a list of all the errors...
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context['course_errors'] = modulestore().get_item_errors(course.location)
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result = render_to_response('courseware.html', context)
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except:
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# In production, don't want to let a 500 out for any reason
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if settings.DEBUG:
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raise
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else:
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log.exception("Error in index view: user={user}, course={course},"
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" chapter={chapter} section={section}"
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"position={position}".format(
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user=request.user,
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course=course,
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chapter=chapter,
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section=section,
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position=position
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))
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try:
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result = render_to_response('courseware-error.html', {})
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except:
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result = HttpResponse("There was an unrecoverable error")
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return result
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@ensure_csrf_cookie
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def jump_to(request, location):
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'''
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Show the page that contains a specific location.
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If the location is invalid or not in any class, return a 404.
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Otherwise, delegates to the index view to figure out whether this user
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has access, and what they should see.
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'''
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# Complain if the location isn't valid
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try:
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location = Location(location)
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except InvalidLocationError:
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raise Http404("Invalid location")
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# Complain if there's not data for this location
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try:
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(course_id, chapter, section, position) = path_to_location(modulestore(), location)
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except ItemNotFoundError:
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raise Http404("No data at this location: {0}".format(location))
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except NoPathToItem:
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raise Http404("This location is not in any class: {0}".format(location))
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# Rely on index to do all error handling and access control.
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return index(request, course_id, chapter, section, position)
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@ensure_csrf_cookie
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def course_info(request, course_id):
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"""
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Display the course's info.html, or 404 if there is no such course.
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Assumes the course_id is in a valid format.
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"""
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course = check_course(course_id)
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return render_to_response('info.html', {'course': course})
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def registered_for_course(course, user):
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'''Return CourseEnrollment if user is registered for course, else False'''
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if user is None:
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return False
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if user.is_authenticated():
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return CourseEnrollment.objects.filter(user=user, course_id=course.id).exists()
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else:
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return False
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@ensure_csrf_cookie
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@cache_if_anonymous
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def course_about(request, course_id):
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course = check_course(course_id, course_must_be_open=False)
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registered = registered_for_course(course, request.user)
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return render_to_response('portal/course_about.html', {'course': course, 'registered': registered})
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@ensure_csrf_cookie
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@cache_if_anonymous
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def university_profile(request, org_id):
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"""
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Return the profile for the particular org_id. 404 if it's not valid.
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"""
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all_courses = modulestore().get_courses()
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valid_org_ids = set(c.org for c in all_courses)
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if org_id not in valid_org_ids:
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raise Http404("University Profile not found for {0}".format(org_id))
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# Only grab courses for this org...
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courses = get_courses_by_university(request.user)[org_id]
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context = dict(courses=courses, org_id=org_id)
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template_file = "university_profile/{0}.html".format(org_id).lower()
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return render_to_response(template_file, context)
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