Exemple #1
0
    def rebind_noauth_module_to_user(module, real_user):
        """
        A function that allows a module to get re-bound to a real user if it was previously bound to an AnonymousUser.

        Will only work within a module bound to an AnonymousUser, e.g. one that's instantiated by the noauth_handler.

        Arguments:
            module (any xblock type):  the module to rebind
            real_user (django.contrib.auth.models.User):  the user to bind to

        Returns:
            nothing (but the side effect is that module is re-bound to real_user)
        """
        if user.is_authenticated():
            err_msg = (
                "rebind_noauth_module_to_user can only be called from a module bound to "
                "an anonymous user")
            log.error(err_msg)
            raise LmsModuleRenderError(err_msg)

        field_data_cache_real_user = FieldDataCache.cache_for_descriptor_descendents(
            course_id,
            real_user,
            module.descriptor,
            asides=XBlockAsidesConfig.possible_asides(),
        )
        student_data_real_user = KvsFieldData(
            DjangoKeyValueStore(field_data_cache_real_user))

        (inner_system, inner_student_data) = get_module_system_for_user(
            user=real_user,
            student_data=
            student_data_real_user,  # These have implicit user bindings, rest of args considered not to
            descriptor=module.descriptor,
            course_id=course_id,
            track_function=track_function,
            xqueue_callback_url_prefix=xqueue_callback_url_prefix,
            position=position,
            wrap_xmodule_display=wrap_xmodule_display,
            grade_bucket_type=grade_bucket_type,
            static_asset_path=static_asset_path,
            user_location=user_location,
            request_token=request_token,
            course=course)

        module.descriptor.bind_for_student(
            inner_system,
            real_user.id,
            [
                partial(OverrideFieldData.wrap, real_user, course),
                partial(LmsFieldData, student_data=inner_student_data),
            ],
        )

        module.descriptor.scope_ids = (module.descriptor.scope_ids._replace(
            user_id=real_user.id))
        module.scope_ids = module.descriptor.scope_ids  # this is needed b/c NamedTuples are immutable
        # now bind the module to the new ModuleSystem instance and vice-versa
        module.runtime = inner_system
        inner_system.xmodule_instance = module
Exemple #2
0
    def custom_report_format(*args, **kwargs):
        """
        This method returns the formated answer for the given user and block.
        """
        user = kwargs.get('user')
        block = kwargs.get('block')

        if block and user:
            student_item_dict = block.student_item_key(user=user)
            submission = sub_api.get_submissions(student_item_dict, limit=1)
            try:
                return submission[0].get('answer')
            except IndexError:
                pass

            descriptor = modulestore().get_item(block.location, depth=1)
            field_data_cache = FieldDataCache.cache_for_descriptor_descendents(
                block.location.course_key,
                user,
                descriptor,
                asides=XBlockAsidesConfig.possible_asides(),
            )
            student_data = KvsFieldData(DjangoKeyValueStore(field_data_cache))

            if student_data.has(block, FIELD):
                return student_data.get(block, FIELD)
        return ''
    def rebind_noauth_module_to_user(module, real_user):
        """
        A function that allows a module to get re-bound to a real user if it was previously bound to an AnonymousUser.

        Will only work within a module bound to an AnonymousUser, e.g. one that's instantiated by the noauth_handler.

        Arguments:
            module (any xblock type):  the module to rebind
            real_user (django.contrib.auth.models.User):  the user to bind to

        Returns:
            nothing (but the side effect is that module is re-bound to real_user)
        """
        if user.is_authenticated():
            err_msg = ("rebind_noauth_module_to_user can only be called from a module bound to "
                       "an anonymous user")
            log.error(err_msg)
            raise LmsModuleRenderError(err_msg)

        field_data_cache_real_user = FieldDataCache.cache_for_descriptor_descendents(
            course_id,
            real_user,
            module.descriptor,
            asides=XBlockAsidesConfig.possible_asides(),
        )
        student_data_real_user = KvsFieldData(DjangoKeyValueStore(field_data_cache_real_user))

        (inner_system, inner_student_data) = get_module_system_for_user(
            user=real_user,
            student_data=student_data_real_user,  # These have implicit user bindings, rest of args considered not to
            descriptor=module.descriptor,
            course_id=course_id,
            track_function=track_function,
            xqueue_callback_url_prefix=xqueue_callback_url_prefix,
            position=position,
            wrap_xmodule_display=wrap_xmodule_display,
            grade_bucket_type=grade_bucket_type,
            static_asset_path=static_asset_path,
            user_location=user_location,
            request_token=request_token,
            course=course
        )

        module.descriptor.bind_for_student(
            inner_system,
            real_user.id,
            [
                partial(OverrideFieldData.wrap, real_user, course),
                partial(LmsFieldData, student_data=inner_student_data),
            ],
        )

        module.descriptor.scope_ids = (
            module.descriptor.scope_ids._replace(user_id=real_user.id)
        )
        module.scope_ids = module.descriptor.scope_ids  # this is needed b/c NamedTuples are immutable
        # now bind the module to the new ModuleSystem instance and vice-versa
        module.runtime = inner_system
        inner_system.xmodule_instance = module
Exemple #4
0
    def applicable_aside_types(self, block):
        """
        Return all of the asides which might be decorating this `block`.

        Arguments:
            block (:class:`.XBlock`): The block to render retrieve asides for.
        """

        config = XBlockAsidesConfig.current()

        if not config.enabled:
            return []

        if block.scope_ids.block_type in config.disabled_blocks.split():
            return []

        return super(LmsModuleSystem, self).applicable_aside_types()
Exemple #5
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    def applicable_aside_types(self, block):
        """
        Return all of the asides which might be decorating this `block`.

        Arguments:
            block (:class:`.XBlock`): The block to render retrieve asides for.
        """

        config = XBlockAsidesConfig.current()

        if not config.enabled:
            return []

        if block.scope_ids.block_type in config.disabled_blocks.split():
            return []

        return super(LmsModuleSystem, self).applicable_aside_types()
Exemple #6
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    def get_asides(self, block):
        """
        Return all of the asides which might be decorating this `block`.

        Arguments:
            block (:class:`.XBlock`): The block to render retrieve asides for.
        """

        config = XBlockAsidesConfig.current()

        if not config.enabled:
            return []

        if block.scope_ids.block_type in config.disabled_blocks.split():
            return []

        return [
            self.get_aside_of_type(block, aside_type)
            for aside_type, __
            in XBlockAside.load_classes()
        ]
Exemple #7
0
    def applicable_aside_types(self, block):
        """
        Return all of the asides which might be decorating this `block`.

        Arguments:
            block (:class:`.XBlock`): The block to render retrieve asides for.
        """

        config = XBlockAsidesConfig.current()

        if not config.enabled:
            return []

        if block.scope_ids.block_type in config.disabled_blocks.split():
            return []

        # TODO: aside_type != 'acid_aside' check should be removed once AcidBlock is only installed during tests
        # (see https://openedx.atlassian.net/browse/TE-811)
        return [
            aside_type for aside_type in super().applicable_aside_types(block)
            if aside_type != 'acid_aside'
        ]
Exemple #8
0
    def applicable_aside_types(self, block):
        """
        Return all of the asides which might be decorating this `block`.

        Arguments:
            block (:class:`.XBlock`): The block to render retrieve asides for.
        """

        config = XBlockAsidesConfig.current()

        if not config.enabled:
            return []

        if block.scope_ids.block_type in config.disabled_blocks.split():
            return []

        # TODO: aside_type != 'acid_aside' check should be removed once AcidBlock is only installed during tests
        # (see https://openedx.atlassian.net/browse/TE-811)
        return [
            aside_type
            for aside_type in super(LmsModuleSystem, self).applicable_aside_types(block)
            if aside_type != 'acid_aside'
        ]
Exemple #9
0
def _index_bulk_op(request, course_key, chapter, section, position):
    """
    Render the index page for the specified course.
    """
    user = request.user
    course = get_course_with_access(user, 'load', course_key, depth=2)

    staff_access = has_access(user, 'staff', course)
    registered = registered_for_course(course, user)
    if not registered:
        # TODO (vshnayder): do course instructors need to be registered to see course?
        log.debug(u'User %s tried to view course %s but is not enrolled', user, course.location.to_deprecated_string())
        return redirect(reverse('about_course', args=[course_key.to_deprecated_string()]))

    # see if all pre-requisites (as per the milestones app feature) have been fulfilled
    # Note that if the pre-requisite feature flag has been turned off (default) then this check will
    # always pass
    if not has_access(user, 'view_courseware_with_prerequisites', course):
        # prerequisites have not been fulfilled therefore redirect to the Dashboard
        log.info(
            u'User %d tried to view course %s '
            u'without fulfilling prerequisites',
            user.id, unicode(course.id))
        return redirect(reverse('dashboard'))

    # check to see if there is a required survey that must be taken before
    # the user can access the course.
    if survey.utils.must_answer_survey(course, user):
        return redirect(reverse('course_survey', args=[unicode(course.id)]))

    masquerade = setup_masquerade(request, course_key, staff_access)

    try:
        field_data_cache = FieldDataCache.cache_for_descriptor_descendents(
            course_key, user, course, depth=2)

        course_module = get_module_for_descriptor(user, request, course, field_data_cache, course_key)
        if course_module is None:
            log.warning(u'If you see this, something went wrong: if we got this'
                        u' far, should have gotten a course module for this user')
            return redirect(reverse('about_course', args=[course_key.to_deprecated_string()]))

        studio_url = get_studio_url(course, 'course')

        context = {
            'csrf': csrf(request)['csrf_token'],
            'accordion': render_accordion(request, course, chapter, section, field_data_cache),
            'COURSE_TITLE': course.display_name_with_default,
            'course': course,
            'init': '',
            'fragment': Fragment(),
            'staff_access': staff_access,
            'studio_url': studio_url,
            'masquerade': masquerade,
            'xqa_server': settings.FEATURES.get('USE_XQA_SERVER', 'http://*****:*****@content-qa.mitx.mit.edu/xqa'),
            'reverifications': fetch_reverify_banner_info(request, course_key),
        }

        now = datetime.now(UTC())
        effective_start = _adjust_start_date_for_beta_testers(user, course, course_key)
        if staff_access and now < effective_start:
            # Disable student view button if user is staff and
            # course is not yet visible to students.
            context['disable_student_access'] = True

        has_content = course.has_children_at_depth(CONTENT_DEPTH)
        if not has_content:
            # Show empty courseware for a course with no units
            return render_to_response('courseware/courseware.html', context)
        elif chapter is None:
            # passing CONTENT_DEPTH avoids returning 404 for a course with an
            # empty first section and a second section with content
            return redirect_to_course_position(course_module, CONTENT_DEPTH)

        # Only show the chat if it's enabled by the course and in the
        # settings.
        show_chat = course.show_chat and settings.FEATURES['ENABLE_CHAT']
        if show_chat:
            context['chat'] = chat_settings(course, user)
            # If we couldn't load the chat settings, then don't show
            # the widget in the courseware.
            if context['chat'] is None:
                show_chat = False

        context['show_chat'] = show_chat

        chapter_descriptor = course.get_child_by(lambda m: m.location.name == chapter)
        if chapter_descriptor is not None:
            save_child_position(course_module, chapter)
        else:
            raise Http404('No chapter descriptor found with name {}'.format(chapter))

        chapter_module = course_module.get_child_by(lambda m: m.location.name == chapter)
        if chapter_module is None:
            # User may be trying to access a chapter that isn't live yet
            if masquerade and masquerade.role == 'student':  # if staff is masquerading as student be kinder, don't 404
                log.debug('staff masquerading as student: no chapter %s', chapter)
                return redirect(reverse('courseware', args=[course.id.to_deprecated_string()]))
            raise Http404

        if section is not None:
            section_descriptor = chapter_descriptor.get_child_by(lambda m: m.location.name == section)

            if section_descriptor is None:
                # Specifically asked-for section doesn't exist
                if masquerade and masquerade.role == 'student':  # don't 404 if staff is masquerading as student
                    log.debug('staff masquerading as student: no section %s', section)
                    return redirect(reverse('courseware', args=[course.id.to_deprecated_string()]))
                raise Http404

            ## Allow chromeless operation
            if section_descriptor.chrome:
                chrome = [s.strip() for s in section_descriptor.chrome.lower().split(",")]
                if 'accordion' not in chrome:
                    context['disable_accordion'] = True
                if 'tabs' not in chrome:
                    context['disable_tabs'] = True

            if section_descriptor.default_tab:
                context['default_tab'] = section_descriptor.default_tab

            # cdodge: this looks silly, but let's refetch the section_descriptor with depth=None
            # which will prefetch the children more efficiently than doing a recursive load
            section_descriptor = modulestore().get_item(section_descriptor.location, depth=None)

            # Load all descendants of the section, because we're going to display its
            # html, which in general will need all of its children
            section_field_data_cache = FieldDataCache.cache_for_descriptor_descendents(
                course_key, user, section_descriptor, depth=None, asides=XBlockAsidesConfig.possible_asides()
            )

            # Verify that position a string is in fact an int
            if position is not None:
                try:
                    int(position)
                except ValueError:
                    raise Http404("Position {} is not an integer!".format(position))

            section_module = get_module_for_descriptor(
                request.user,
                request,
                section_descriptor,
                section_field_data_cache,
                course_key,
                position
            )

            if section_module is None:
                # User may be trying to be clever and access something
                # they don't have access to.
                raise Http404

            # Save where we are in the chapter
            save_child_position(chapter_module, section)
            context['fragment'] = section_module.render(STUDENT_VIEW)
            context['section_title'] = section_descriptor.display_name_with_default
        else:
            # section is none, so display a message
            studio_url = get_studio_url(course, 'course')
            prev_section = get_current_child(chapter_module)
            if prev_section is None:
                # Something went wrong -- perhaps this chapter has no sections visible to the user.
                # Clearing out the last-visited state and showing "first-time" view by redirecting
                # to courseware.
                course_module.position = None
                course_module.save()
                return redirect(reverse('courseware', args=[course.id.to_deprecated_string()]))
            prev_section_url = reverse('courseware_section', kwargs={
                'course_id': course_key.to_deprecated_string(),
                'chapter': chapter_descriptor.url_name,
                'section': prev_section.url_name
            })
            context['fragment'] = Fragment(content=render_to_string(
                'courseware/welcome-back.html',
                {
                    'course': course,
                    'studio_url': studio_url,
                    'chapter_module': chapter_module,
                    'prev_section': prev_section,
                    'prev_section_url': prev_section_url
                }
            ))

        result = render_to_response('courseware/courseware.html', context)
    except Exception as e:

        # Doesn't bar Unicode characters from URL, but if Unicode characters do
        # cause an error it is a graceful failure.
        if isinstance(e, UnicodeEncodeError):
            raise Http404("URL contains Unicode characters")

        if isinstance(e, Http404):
            # let it propagate
            raise

        # In production, don't want to let a 500 out for any reason
        if settings.DEBUG:
            raise
        else:
            log.exception(
                u"Error in index view: user={user}, course={course}, chapter={chapter}"
                u" section={section} position={position}".format(
                    user=user,
                    course=course,
                    chapter=chapter,
                    section=section,
                    position=position
                ))
            try:
                result = render_to_response('courseware/courseware-error.html', {
                    'staff_access': staff_access,
                    'course': course
                })
            except:
                # Let the exception propagate, relying on global config to at
                # at least return a nice error message
                log.exception("Error while rendering courseware-error page")
                raise

    return result
Exemple #10
0
def _index_bulk_op(request, course_key, chapter, section, position):
    """
    Render the index page for the specified course.
    """
    user = request.user
    course = get_course_with_access(user, 'load', course_key, depth=2)

    staff_access = has_access(user, 'staff', course)
    registered = registered_for_course(course, user)
    if not registered:
        # TODO (vshnayder): do course instructors need to be registered to see course?
        log.debug(u'User %s tried to view course %s but is not enrolled', user, course.location.to_deprecated_string())
        return redirect(reverse('about_course', args=[course_key.to_deprecated_string()]))

    # see if all pre-requisites (as per the milestones app feature) have been fulfilled
    # Note that if the pre-requisite feature flag has been turned off (default) then this check will
    # always pass
    if not has_access(user, 'view_courseware_with_prerequisites', course):
        # prerequisites have not been fulfilled therefore redirect to the Dashboard
        log.info(
            u'User %d tried to view course %s '
            u'without fulfilling prerequisites',
            user.id, unicode(course.id))
        return redirect(reverse('dashboard'))

    # check to see if there is a required survey that must be taken before
    # the user can access the course.
    if survey.utils.must_answer_survey(course, user):
        return redirect(reverse('course_survey', args=[unicode(course.id)]))

    masquerade = setup_masquerade(request, course_key, staff_access)

    try:
        field_data_cache = FieldDataCache.cache_for_descriptor_descendents(
            course_key, user, course, depth=2)

        course_module = get_module_for_descriptor(user, request, course, field_data_cache, course_key)
        if course_module is None:
            log.warning(u'If you see this, something went wrong: if we got this'
                        u' far, should have gotten a course module for this user')
            return redirect(reverse('about_course', args=[course_key.to_deprecated_string()]))

        studio_url = get_studio_url(course, 'course')

        context = {
            'csrf': csrf(request)['csrf_token'],
            'accordion': render_accordion(request, course, chapter, section, field_data_cache),
            'COURSE_TITLE': course.display_name_with_default,
            'course': course,
            'init': '',
            'fragment': Fragment(),
            'staff_access': staff_access,
            'studio_url': studio_url,
            'masquerade': masquerade,
            'xqa_server': settings.FEATURES.get('USE_XQA_SERVER', 'http://*****:*****@content-qa.mitx.mit.edu/xqa'),
            'reverifications': fetch_reverify_banner_info(request, course_key),
        }

        now = datetime.now(UTC())
        effective_start = _adjust_start_date_for_beta_testers(user, course, course_key)
        if staff_access and now < effective_start:
            # Disable student view button if user is staff and
            # course is not yet visible to students.
            context['disable_student_access'] = True

        has_content = course.has_children_at_depth(CONTENT_DEPTH)
        if not has_content:
            # Show empty courseware for a course with no units
            return render_to_response('courseware/courseware.html', context)
        elif chapter is None:
            # passing CONTENT_DEPTH avoids returning 404 for a course with an
            # empty first section and a second section with content
            return redirect_to_course_position(course_module, CONTENT_DEPTH)

        # Only show the chat if it's enabled by the course and in the
        # settings.
        show_chat = course.show_chat and settings.FEATURES['ENABLE_CHAT']
        if show_chat:
            context['chat'] = chat_settings(course, user)
            # If we couldn't load the chat settings, then don't show
            # the widget in the courseware.
            if context['chat'] is None:
                show_chat = False

        context['show_chat'] = show_chat

        chapter_descriptor = course.get_child_by(lambda m: m.location.name == chapter)
        if chapter_descriptor is not None:
            save_child_position(course_module, chapter)
        else:
            raise Http404('No chapter descriptor found with name {}'.format(chapter))

        chapter_module = course_module.get_child_by(lambda m: m.location.name == chapter)
        if chapter_module is None:
            # User may be trying to access a chapter that isn't live yet
            if masquerade and masquerade.role == 'student':  # if staff is masquerading as student be kinder, don't 404
                log.debug('staff masquerading as student: no chapter %s', chapter)
                return redirect(reverse('courseware', args=[course.id.to_deprecated_string()]))
            raise Http404

        if section is not None:
            section_descriptor = chapter_descriptor.get_child_by(lambda m: m.location.name == section)

            if section_descriptor is None:
                # Specifically asked-for section doesn't exist
                if masquerade and masquerade.role == 'student':  # don't 404 if staff is masquerading as student
                    log.debug('staff masquerading as student: no section %s', section)
                    return redirect(reverse('courseware', args=[course.id.to_deprecated_string()]))
                raise Http404

            ## Allow chromeless operation
            if section_descriptor.chrome:
                chrome = [s.strip() for s in section_descriptor.chrome.lower().split(",")]
                if 'accordion' not in chrome:
                    context['disable_accordion'] = True
                if 'tabs' not in chrome:
                    context['disable_tabs'] = True

            if section_descriptor.default_tab:
                context['default_tab'] = section_descriptor.default_tab

            # cdodge: this looks silly, but let's refetch the section_descriptor with depth=None
            # which will prefetch the children more efficiently than doing a recursive load
            section_descriptor = modulestore().get_item(section_descriptor.location, depth=None)

            # Load all descendants of the section, because we're going to display its
            # html, which in general will need all of its children
            section_field_data_cache = FieldDataCache.cache_for_descriptor_descendents(
                course_key, user, section_descriptor, depth=None, asides=XBlockAsidesConfig.possible_asides()
            )

            # Verify that position a string is in fact an int
            if position is not None:
                try:
                    int(position)
                except ValueError:
                    raise Http404("Position {} is not an integer!".format(position))

            section_module = get_module_for_descriptor(
                request.user,
                request,
                section_descriptor,
                section_field_data_cache,
                course_key,
                position
            )

            if section_module is None:
                # User may be trying to be clever and access something
                # they don't have access to.
                raise Http404

            # Save where we are in the chapter
            save_child_position(chapter_module, section)
            context['fragment'] = section_module.render(STUDENT_VIEW)
            context['section_title'] = section_descriptor.display_name_with_default
        else:
            # section is none, so display a message
            studio_url = get_studio_url(course, 'course')
            prev_section = get_current_child(chapter_module)
            if prev_section is None:
                # Something went wrong -- perhaps this chapter has no sections visible to the user.
                # Clearing out the last-visited state and showing "first-time" view by redirecting
                # to courseware.
                course_module.position = None
                course_module.save()
                return redirect(reverse('courseware', args=[course.id.to_deprecated_string()]))
            prev_section_url = reverse('courseware_section', kwargs={
                'course_id': course_key.to_deprecated_string(),
                'chapter': chapter_descriptor.url_name,
                'section': prev_section.url_name
            })
            context['fragment'] = Fragment(content=render_to_string(
                'courseware/welcome-back.html',
                {
                    'course': course,
                    'studio_url': studio_url,
                    'chapter_module': chapter_module,
                    'prev_section': prev_section,
                    'prev_section_url': prev_section_url
                }
            ))

        result = render_to_response('courseware/courseware.html', context)
    except Exception as e:

        # Doesn't bar Unicode characters from URL, but if Unicode characters do
        # cause an error it is a graceful failure.
        if isinstance(e, UnicodeEncodeError):
            raise Http404("URL contains Unicode characters")

        if isinstance(e, Http404):
            # let it propagate
            raise

        # In production, don't want to let a 500 out for any reason
        if settings.DEBUG:
            raise
        else:
            log.exception(
                u"Error in index view: user={user}, course={course}, chapter={chapter}"
                u" section={section} position={position}".format(
                    user=user,
                    course=course,
                    chapter=chapter,
                    section=section,
                    position=position
                ))
            try:
                result = render_to_response('courseware/courseware-error.html', {
                    'staff_access': staff_access,
                    'course': course
                })
            except:
                # Let the exception propagate, relying on global config to at
                # at least return a nice error message
                log.exception("Error while rendering courseware-error page")
                raise

    return result