def test_user_role_staff(self):
"""Ensure that user role is student for staff masqueraded as student."""
self.assertEqual(
'staff', access.get_user_role(self.course_staff, self.course_key))
# Masquerade staff
self._install_masquerade(self.course_staff)
self.assertEqual(
'student', access.get_user_role(self.course_staff,
self.course_key))
def test_user_role_staff(self):
"""Ensure that user role is student for staff masqueraded as student."""
self.assertEqual(
'staff',
access.get_user_role(self.course_staff, self.course.course_id))
# Masquerade staff
self.course_staff.masquerade_as_student = True
self.assertEqual(
'student',
access.get_user_role(self.course_staff, self.course.course_id))
def test_user_role_instructor(self):
"""Ensure that user role is student for instructor masqueraded as student."""
self.assertEqual(
'instructor',
access.get_user_role(self.course_instructor, self.course_key))
# Masquerade instructor
self._install_masquerade(self.course_instructor)
self.assertEqual(
'student',
access.get_user_role(self.course_instructor, self.course_key))
def test_user_role_instructor(self):
"""Ensure that user role is student for instructor masqueraded as student."""
self.assertEqual(
'instructor',
access.get_user_role(self.course_instructor,
self.course.course_id))
# Masquerade instructor
self.course_instructor.masquerade_as_student = True
self.assertEqual(
'student',
access.get_user_role(self.course_instructor,
self.course.course_id))
def test_user_role_instructor(self):
"""Ensure that user role is student for instructor masqueraded as student."""
self.assertEqual(
'instructor',
access.get_user_role(self.course_instructor, self.course_key)
)
# Masquerade instructor
self._install_masquerade(self.course_instructor)
self.assertEqual(
'student',
access.get_user_role(self.course_instructor, self.course_key)
)
def test_user_role_staff(self):
"""Ensure that user role is student for staff masqueraded as student."""
self.assertEqual(
'staff',
access.get_user_role(self.course_staff, self.course.course_id)
)
# Masquerade staff
self.course_staff.masquerade_as_student = True
self.assertEqual(
'student',
access.get_user_role(self.course_staff, self.course.course_id)
)
def test_user_role_instructor(self):
"""Ensure that user role is student for instructor masqueraded as student."""
self.assertEqual(
'instructor',
access.get_user_role(self.course_instructor, self.course.course_id)
)
# Masquerade instructor
self.course_instructor.masquerade_as_student = True
self.assertEqual(
'student',
access.get_user_role(self.course_instructor, self.course.course_id)
)
def test_user_role_staff(self):
"""Ensure that user role is student for staff masqueraded as student."""
self.assertEqual(
'staff',
access.get_user_role(self.course_staff, self.course_key)
)
# Masquerade staff
self._install_masquerade(self.course_staff)
self.assertEqual(
'student',
access.get_user_role(self.course_staff, self.course_key)
)
def filter_dictionary(self, **kwargs):
""" base implementation which filters via start_date """
filter_dictionary = super(LmsSearchFilterGenerator,
self).filter_dictionary(**kwargs)
if 'user' in kwargs and 'course_id' in kwargs and kwargs['course_id']:
user = kwargs['user']
try:
course_key = CourseKey.from_string(kwargs['course_id'])
except InvalidKeyError:
course_key = SlashSeparatedCourseKey.from_deprecated_string(
kwargs['course_id'])
# Staff user looking at course as staff user
if get_user_role(user, course_key) == 'staff':
return filter_dictionary
cohorted_user_partition = get_cohorted_user_partition(course_key)
if cohorted_user_partition:
partition_group = cohorted_user_partition.scheme.get_group_for_user(
course_key,
user,
cohorted_user_partition,
)
filter_dictionary['content_groups'] = unicode(
partition_group.id) if partition_group else None
return filter_dictionary
def filter_dictionary(self, **kwargs):
""" LMS implementation, adds filtering by user partition, course id and user """
def get_group_for_user_partition(user_partition, course_key, user):
""" Returns the specified user's group for user partition """
if user_partition.scheme in SCHEME_SUPPORTS_ASSIGNMENT:
return user_partition.scheme.get_group_for_user(
course_key,
user,
user_partition,
assign=False,
)
else:
return user_partition.scheme.get_group_for_user(
course_key,
user,
user_partition,
)
def get_group_ids_for_user(course, user):
""" Collect user partition group ids for user for this course """
partition_groups = []
for user_partition in course.user_partitions:
if user_partition.scheme in INCLUDE_SCHEMES:
group = get_group_for_user_partition(user_partition, course.id, user)
if group:
partition_groups.append(group)
partition_group_ids = [unicode(partition_group.id) for partition_group in partition_groups]
return partition_group_ids if partition_group_ids else None
filter_dictionary = super(LmsSearchFilterGenerator, self).filter_dictionary(**kwargs)
if 'user' in kwargs:
user = kwargs['user']
if 'course_id' in kwargs and kwargs['course_id']:
try:
course_key = CourseKey.from_string(kwargs['course_id'])
except InvalidKeyError:
course_key = SlashSeparatedCourseKey.from_deprecated_string(kwargs['course_id'])
# Staff user looking at course as staff user
if get_user_role(user, course_key) == 'staff':
return filter_dictionary
# Need to check course exist (if course gets deleted enrollments don't get cleaned up)
course = modulestore().get_course(course_key)
if course:
filter_dictionary['content_groups'] = get_group_ids_for_user(course, user)
else:
user_enrollments = self._enrollments_for_user(user)
content_groups = []
for enrollment in user_enrollments:
course = modulestore().get_course(enrollment.course_id)
if course:
enrollment_group_ids = get_group_ids_for_user(course, user)
if enrollment_group_ids:
content_groups.extend(enrollment_group_ids)
filter_dictionary['content_groups'] = content_groups if content_groups else None
return filter_dictionary
def filter_dictionary(self, **kwargs):
""" base implementation which filters via start_date """
filter_dictionary = super(LmsSearchFilterGenerator, self).filter_dictionary(**kwargs)
if "user" in kwargs and "course_id" in kwargs and kwargs["course_id"]:
user = kwargs["user"]
try:
course_key = CourseKey.from_string(kwargs["course_id"])
except InvalidKeyError:
course_key = SlashSeparatedCourseKey.from_deprecated_string(kwargs["course_id"])
# Staff user looking at course as staff user
if get_user_role(user, course_key) == "staff":
return filter_dictionary
cohorted_user_partition = get_cohorted_user_partition(course_key)
if cohorted_user_partition:
partition_group = cohorted_user_partition.scheme.get_group_for_user(
course_key, user, cohorted_user_partition
)
filter_dictionary["content_groups"] = unicode(partition_group.id) if partition_group else None
return filter_dictionary
def get_module_for_descriptor_internal(user, descriptor, field_data_cache, course_id,
track_function, xqueue_callback_url_prefix,
position=None, wrap_xmodule_display=True, grade_bucket_type=None,
static_asset_path=''):
"""
Actually implement get_module, without requiring a request.
See get_module() docstring for further details.
"""
# Do not check access when it's a noauth request.
if getattr(user, 'known', True):
# Short circuit--if the user shouldn't have access, bail without doing any work
if not has_access(user, descriptor, 'load', course_id):
return None
student_data = KvsFieldData(DjangoKeyValueStore(field_data_cache))
def make_xqueue_callback(dispatch='score_update'):
# Fully qualified callback URL for external queueing system
relative_xqueue_callback_url = reverse(
'xqueue_callback',
kwargs=dict(
course_id=course_id,
userid=str(user.id),
mod_id=descriptor.location.url(),
dispatch=dispatch
),
)
return xqueue_callback_url_prefix + relative_xqueue_callback_url
# Default queuename is course-specific and is derived from the course that
# contains the current module.
# TODO: Queuename should be derived from 'course_settings.json' of each course
xqueue_default_queuename = descriptor.location.org + '-' + descriptor.location.course
xqueue = {
'interface': xqueue_interface,
'construct_callback': make_xqueue_callback,
'default_queuename': xqueue_default_queuename.replace(' ', '_'),
'waittime': settings.XQUEUE_WAITTIME_BETWEEN_REQUESTS
}
# This is a hacky way to pass settings to the combined open ended xmodule
# It needs an S3 interface to upload images to S3
# It needs the open ended grading interface in order to get peer grading to be done
# this first checks to see if the descriptor is the correct one, and only sends settings if it is
# Get descriptor metadata fields indicating needs for various settings
needs_open_ended_interface = getattr(descriptor, "needs_open_ended_interface", False)
needs_s3_interface = getattr(descriptor, "needs_s3_interface", False)
# Initialize interfaces to None
open_ended_grading_interface = None
s3_interface = None
# Create interfaces if needed
if needs_open_ended_interface:
open_ended_grading_interface = settings.OPEN_ENDED_GRADING_INTERFACE
open_ended_grading_interface['mock_peer_grading'] = settings.MOCK_PEER_GRADING
open_ended_grading_interface['mock_staff_grading'] = settings.MOCK_STAFF_GRADING
if needs_s3_interface:
s3_interface = {
'access_key': getattr(settings, 'AWS_ACCESS_KEY_ID', ''),
'secret_access_key': getattr(settings, 'AWS_SECRET_ACCESS_KEY', ''),
'storage_bucket_name': getattr(settings, 'AWS_STORAGE_BUCKET_NAME', 'openended')
}
def inner_get_module(descriptor):
"""
Delegate to get_module_for_descriptor_internal() with all values except `descriptor` set.
Because it does an access check, it may return None.
"""
# TODO: fix this so that make_xqueue_callback uses the descriptor passed into
# inner_get_module, not the parent's callback. Add it as an argument....
return get_module_for_descriptor_internal(user, descriptor, field_data_cache, course_id,
track_function, make_xqueue_callback,
position, wrap_xmodule_display, grade_bucket_type,
static_asset_path)
def handle_grade_event(block, event_type, event):
user_id = event.get('user_id', user.id)
# Construct the key for the module
key = KeyValueStore.Key(
scope=Scope.user_state,
user_id=user_id,
block_scope_id=descriptor.location,
field_name='grade'
)
student_module = field_data_cache.find_or_create(key)
# Update the grades
student_module.grade = event.get('value')
student_module.max_grade = event.get('max_value')
# Save all changes to the underlying KeyValueStore
student_module.save()
# Bin score into range and increment stats
score_bucket = get_score_bucket(student_module.grade, student_module.max_grade)
course_id_dict = Location.parse_course_id(course_id)
tags = [
u"org:{org}".format(**course_id_dict),
u"course:{course}".format(**course_id_dict),
u"run:{name}".format(**course_id_dict),
u"score_bucket:{0}".format(score_bucket)
]
if grade_bucket_type is not None:
tags.append('type:%s' % grade_bucket_type)
dog_stats_api.increment("lms.courseware.question_answered", tags=tags)
def publish(block, event_type, event):
"""A function that allows XModules to publish events."""
if event_type == 'grade':
handle_grade_event(block, event_type, event)
else:
track_function(event_type, event)
# Build a list of wrapping functions that will be applied in order
# to the Fragment content coming out of the xblocks that are about to be rendered.
block_wrappers = []
# Wrap the output display in a single div to allow for the XModule
# javascript to be bound correctly
if wrap_xmodule_display is True:
block_wrappers.append(partial(wrap_xblock, 'LmsRuntime', extra_data={'course-id': course_id}))
# TODO (cpennington): When modules are shared between courses, the static
# prefix is going to have to be specific to the module, not the directory
# that the xml was loaded from
# Rewrite urls beginning in /static to point to course-specific content
block_wrappers.append(partial(
replace_static_urls,
getattr(descriptor, 'data_dir', None),
course_id=course_id,
static_asset_path=static_asset_path or descriptor.static_asset_path
))
# Allow URLs of the form '/course/' refer to the root of multicourse directory
# hierarchy of this course
block_wrappers.append(partial(replace_course_urls, course_id))
# this will rewrite intra-courseware links (/jump_to_id/<id>). This format
# is an improvement over the /course/... format for studio authored courses,
# because it is agnostic to course-hierarchy.
# NOTE: module_id is empty string here. The 'module_id' will get assigned in the replacement
# function, we just need to specify something to get the reverse() to work.
block_wrappers.append(partial(
replace_jump_to_id_urls,
course_id,
reverse('jump_to_id', kwargs={'course_id': course_id, 'module_id': ''}),
))
if settings.FEATURES.get('DISPLAY_DEBUG_INFO_TO_STAFF'):
if has_access(user, descriptor, 'staff', course_id):
block_wrappers.append(partial(add_staff_markup, user))
# These modules store data using the anonymous_student_id as a key.
# To prevent loss of data, we will continue to provide old modules with
# the per-student anonymized id (as we have in the past),
# while giving selected modules a per-course anonymized id.
# As we have the time to manually test more modules, we can add to the list
# of modules that get the per-course anonymized id.
is_pure_xblock = isinstance(descriptor, XBlock) and not isinstance(descriptor, XModuleDescriptor)
module_class = getattr(descriptor, 'module_class', None)
is_lti_module = not is_pure_xblock and issubclass(module_class, LTIModule)
if is_pure_xblock or is_lti_module:
anonymous_student_id = anonymous_id_for_user(user, course_id)
else:
anonymous_student_id = anonymous_id_for_user(user, '')
system = LmsModuleSystem(
track_function=track_function,
render_template=render_to_string,
static_url=settings.STATIC_URL,
xqueue=xqueue,
# TODO (cpennington): Figure out how to share info between systems
filestore=descriptor.runtime.resources_fs,
get_module=inner_get_module,
user=user,
debug=settings.DEBUG,
hostname=settings.SITE_NAME,
# TODO (cpennington): This should be removed when all html from
# a module is coming through get_html and is therefore covered
# by the replace_static_urls code below
replace_urls=partial(
static_replace.replace_static_urls,
data_directory=getattr(descriptor, 'data_dir', None),
course_id=course_id,
static_asset_path=static_asset_path or descriptor.static_asset_path,
),
replace_course_urls=partial(
static_replace.replace_course_urls,
course_id=course_id
),
replace_jump_to_id_urls=partial(
static_replace.replace_jump_to_id_urls,
course_id=course_id,
jump_to_id_base_url=reverse('jump_to_id', kwargs={'course_id': course_id, 'module_id': ''})
),
node_path=settings.NODE_PATH,
publish=publish,
anonymous_student_id=anonymous_student_id,
course_id=course_id,
open_ended_grading_interface=open_ended_grading_interface,
s3_interface=s3_interface,
cache=cache,
can_execute_unsafe_code=(lambda: can_execute_unsafe_code(course_id)),
# TODO: When we merge the descriptor and module systems, we can stop reaching into the mixologist (cpennington)
mixins=descriptor.runtime.mixologist._mixins, # pylint: disable=protected-access
wrappers=block_wrappers,
get_real_user=user_by_anonymous_id,
services={
'i18n': ModuleI18nService(),
},
get_user_role=lambda: get_user_role(user, course_id),
descriptor_runtime=descriptor.runtime,
)
# pass position specified in URL to module through ModuleSystem
system.set('position', position)
if settings.FEATURES.get('ENABLE_PSYCHOMETRICS'):
system.set(
'psychometrics_handler', # set callback for updating PsychometricsData
make_psychometrics_data_update_handler(course_id, user, descriptor.location.url())
)
system.set(u'user_is_staff', has_access(user, descriptor.location, u'staff', course_id))
# make an ErrorDescriptor -- assuming that the descriptor's system is ok
if has_access(user, descriptor.location, 'staff', course_id):
system.error_descriptor_class = ErrorDescriptor
else:
system.error_descriptor_class = NonStaffErrorDescriptor
descriptor.bind_for_student(system, LmsFieldData(descriptor._field_data, student_data)) # pylint: disable=protected-access
descriptor.scope_ids = descriptor.scope_ids._replace(user_id=user.id) # pylint: disable=protected-access
return descriptor
def get_module_system_for_user(
user,
student_data, # TODO
# Arguments preceding this comment have user binding, those following don't
descriptor,
course_id,
track_function,
xqueue_callback_url_prefix,
request_token,
position=None,
wrap_xmodule_display=True,
grade_bucket_type=None,
static_asset_path='',
user_location=None,
disable_staff_debug_info=False,
course=None
):
"""
Helper function that returns a module system and student_data bound to a user and a descriptor.
The purpose of this function is to factor out everywhere a user is implicitly bound when creating a module,
to allow an existing module to be re-bound to a user. Most of the user bindings happen when creating the
closures that feed the instantiation of ModuleSystem.
The arguments fall into two categories: those that have explicit or implicit user binding, which are user
and student_data, and those don't and are just present so that ModuleSystem can be instantiated, which
are all the other arguments. Ultimately, this isn't too different than how get_module_for_descriptor_internal
was before refactoring.
Arguments:
see arguments for get_module()
request_token (str): A token unique to the request use by xblock initialization
Returns:
(LmsModuleSystem, KvsFieldData): (module system, student_data) bound to, primarily, the user and descriptor
"""
def make_xqueue_callback(dispatch='score_update'):
"""
Returns fully qualified callback URL for external queueing system
"""
relative_xqueue_callback_url = reverse(
'xqueue_callback',
kwargs=dict(
course_id=text_type(course_id),
userid=str(user.id),
mod_id=text_type(descriptor.location),
dispatch=dispatch
),
)
return xqueue_callback_url_prefix + relative_xqueue_callback_url
# Default queuename is course-specific and is derived from the course that
# contains the current module.
# TODO: Queuename should be derived from 'course_settings.json' of each course
xqueue_default_queuename = descriptor.location.org + '-' + descriptor.location.course
xqueue = {
'interface': XQUEUE_INTERFACE,
'construct_callback': make_xqueue_callback,
'default_queuename': xqueue_default_queuename.replace(' ', '_'),
'waittime': settings.XQUEUE_WAITTIME_BETWEEN_REQUESTS
}
def inner_get_module(descriptor):
"""
Delegate to get_module_for_descriptor_internal() with all values except `descriptor` set.
Because it does an access check, it may return None.
"""
# TODO: fix this so that make_xqueue_callback uses the descriptor passed into
# inner_get_module, not the parent's callback. Add it as an argument....
return get_module_for_descriptor_internal(
user=user,
descriptor=descriptor,
student_data=student_data,
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
)
def get_event_handler(event_type):
"""
Return an appropriate function to handle the event.
Returns None if no special processing is required.
"""
handlers = {
'grade': handle_grade_event,
}
if completion_waffle.waffle().is_enabled(completion_waffle.ENABLE_COMPLETION_TRACKING):
handlers.update({
'completion': handle_completion_event,
'progress': handle_deprecated_progress_event,
})
return handlers.get(event_type)
def publish(block, event_type, event):
"""
A function that allows XModules to publish events.
"""
handle_event = get_event_handler(event_type)
if handle_event and not is_masquerading_as_specific_student(user, course_id):
handle_event(block, event)
else:
context = contexts.course_context_from_course_id(course_id)
if block.runtime.user_id:
context['user_id'] = block.runtime.user_id
context['asides'] = {}
for aside in block.runtime.get_asides(block):
if hasattr(aside, 'get_event_context'):
aside_event_info = aside.get_event_context(event_type, event)
if aside_event_info is not None:
context['asides'][aside.scope_ids.block_type] = aside_event_info
with tracker.get_tracker().context(event_type, context):
track_function(event_type, event)
def handle_completion_event(block, event):
"""
Submit a completion object for the block.
"""
if not completion_waffle.waffle().is_enabled(completion_waffle.ENABLE_COMPLETION_TRACKING):
raise Http404
else:
BlockCompletion.objects.submit_completion(
user=user,
course_key=course_id,
block_key=block.scope_ids.usage_id,
completion=event['completion'],
)
def handle_grade_event(block, event):
"""
Submit a grade for the block.
"""
SCORE_PUBLISHED.send(
sender=None,
block=block,
user=user,
raw_earned=event['value'],
raw_possible=event['max_value'],
only_if_higher=event.get('only_if_higher'),
score_deleted=event.get('score_deleted'),
grader_response=event.get('grader_response')
)
def handle_deprecated_progress_event(block, event):
"""
DEPRECATED: Submit a completion for the block represented by the
progress event.
This exists to support the legacy progress extension used by
edx-solutions. New XBlocks should not emit these events, but instead
emit completion events directly.
"""
if not completion_waffle.waffle().is_enabled(completion_waffle.ENABLE_COMPLETION_TRACKING):
raise Http404
else:
requested_user_id = event.get('user_id', user.id)
if requested_user_id != user.id:
log.warning("{} tried to submit a completion on behalf of {}".format(user, requested_user_id))
return
# If blocks explicitly declare support for the new completion API,
# we expect them to emit 'completion' events,
# and we ignore the deprecated 'progress' events
# in order to avoid duplicate work and possibly conflicting semantics.
if not getattr(block, 'has_custom_completion', False):
BlockCompletion.objects.submit_completion(
user=user,
course_key=course_id,
block_key=block.scope_ids.usage_id,
completion=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
# Build a list of wrapping functions that will be applied in order
# to the Fragment content coming out of the xblocks that are about to be rendered.
block_wrappers = []
if is_masquerading_as_specific_student(user, course_id):
block_wrappers.append(filter_displayed_blocks)
if settings.FEATURES.get("LICENSING", False):
block_wrappers.append(wrap_with_license)
# Wrap the output display in a single div to allow for the XModule
# javascript to be bound correctly
if wrap_xmodule_display is True:
block_wrappers.append(partial(
wrap_xblock,
'LmsRuntime',
extra_data={'course-id': text_type(course_id)},
usage_id_serializer=lambda usage_id: quote_slashes(text_type(usage_id)),
request_token=request_token,
))
# TODO (cpennington): When modules are shared between courses, the static
# prefix is going to have to be specific to the module, not the directory
# that the xml was loaded from
# Rewrite urls beginning in /static to point to course-specific content
block_wrappers.append(partial(
replace_static_urls,
getattr(descriptor, 'data_dir', None),
course_id=course_id,
static_asset_path=static_asset_path or descriptor.static_asset_path
))
# Allow URLs of the form '/course/' refer to the root of multicourse directory
# hierarchy of this course
block_wrappers.append(partial(replace_course_urls, course_id))
# this will rewrite intra-courseware links (/jump_to_id/<id>). This format
# is an improvement over the /course/... format for studio authored courses,
# because it is agnostic to course-hierarchy.
# NOTE: module_id is empty string here. The 'module_id' will get assigned in the replacement
# function, we just need to specify something to get the reverse() to work.
block_wrappers.append(partial(
replace_jump_to_id_urls,
course_id,
reverse('jump_to_id', kwargs={'course_id': text_type(course_id), 'module_id': ''}),
))
if settings.FEATURES.get('DISPLAY_DEBUG_INFO_TO_STAFF'):
if is_masquerading_as_specific_student(user, course_id):
# When masquerading as a specific student, we want to show the debug button
# unconditionally to enable resetting the state of the student we are masquerading as.
# We already know the user has staff access when masquerading is active.
staff_access = True
# To figure out whether the user has instructor access, we temporarily remove the
# masquerade_settings from the real_user. With the masquerading settings in place,
# the result would always be "False".
masquerade_settings = user.real_user.masquerade_settings
del user.real_user.masquerade_settings
user.real_user.masquerade_settings = masquerade_settings
else:
staff_access = has_access(user, 'staff', descriptor, course_id)
if staff_access:
block_wrappers.append(partial(add_staff_markup, user, disable_staff_debug_info))
# These modules store data using the anonymous_student_id as a key.
# To prevent loss of data, we will continue to provide old modules with
# the per-student anonymized id (as we have in the past),
# while giving selected modules a per-course anonymized id.
# As we have the time to manually test more modules, we can add to the list
# of modules that get the per-course anonymized id.
is_pure_xblock = isinstance(descriptor, XBlock) and not isinstance(descriptor, XModuleDescriptor)
module_class = getattr(descriptor, 'module_class', None)
is_lti_module = not is_pure_xblock and issubclass(module_class, LTIModule)
if is_pure_xblock or is_lti_module:
anonymous_student_id = anonymous_id_for_user(user, course_id)
else:
anonymous_student_id = anonymous_id_for_user(user, None)
field_data = LmsFieldData(descriptor._field_data, student_data) # pylint: disable=protected-access
user_is_staff = bool(has_access(user, u'staff', descriptor.location, course_id))
system = LmsModuleSystem(
track_function=track_function,
render_template=render_to_string,
static_url=settings.STATIC_URL,
xqueue=xqueue,
# TODO (cpennington): Figure out how to share info between systems
filestore=descriptor.runtime.resources_fs,
get_module=inner_get_module,
user=user,
debug=settings.DEBUG,
hostname=settings.SITE_NAME,
# TODO (cpennington): This should be removed when all html from
# a module is coming through get_html and is therefore covered
# by the replace_static_urls code below
replace_urls=partial(
static_replace.replace_static_urls,
data_directory=getattr(descriptor, 'data_dir', None),
course_id=course_id,
static_asset_path=static_asset_path or descriptor.static_asset_path,
),
replace_course_urls=partial(
static_replace.replace_course_urls,
course_key=course_id
),
replace_jump_to_id_urls=partial(
static_replace.replace_jump_to_id_urls,
course_id=course_id,
jump_to_id_base_url=reverse('jump_to_id', kwargs={'course_id': text_type(course_id), 'module_id': ''})
),
node_path=settings.NODE_PATH,
publish=publish,
anonymous_student_id=anonymous_student_id,
course_id=course_id,
cache=cache,
can_execute_unsafe_code=(lambda: can_execute_unsafe_code(course_id)),
get_python_lib_zip=(lambda: get_python_lib_zip(contentstore, course_id)),
# TODO: When we merge the descriptor and module systems, we can stop reaching into the mixologist (cpennington)
mixins=descriptor.runtime.mixologist._mixins, # pylint: disable=protected-access
wrappers=block_wrappers,
get_real_user=user_by_anonymous_id,
services={
'fs': FSService(),
'field-data': field_data,
'user': DjangoXBlockUserService(user, user_is_staff=user_is_staff),
'verification': XBlockVerificationService(),
'proctoring': ProctoringService(),
'milestones': milestones_helpers.get_service(),
'credit': CreditService(),
'bookmarks': BookmarksService(user=user),
'gating': GatingService(),
},
get_user_role=lambda: get_user_role(user, course_id),
descriptor_runtime=descriptor._runtime, # pylint: disable=protected-access
rebind_noauth_module_to_user=rebind_noauth_module_to_user,
user_location=user_location,
request_token=request_token,
)
# pass position specified in URL to module through ModuleSystem
if position is not None:
try:
position = int(position)
except (ValueError, TypeError):
log.exception('Non-integer %r passed as position.', position)
position = None
system.set('position', position)
system.set(u'user_is_staff', user_is_staff)
system.set(u'user_is_admin', bool(has_access(user, u'staff', 'global')))
system.set(u'user_is_beta_tester', CourseBetaTesterRole(course_id).has_user(user))
system.set(u'days_early_for_beta', descriptor.days_early_for_beta)
# make an ErrorDescriptor -- assuming that the descriptor's system is ok
if has_access(user, u'staff', descriptor.location, course_id):
system.error_descriptor_class = ErrorDescriptor
else:
system.error_descriptor_class = NonStaffErrorDescriptor
return system, field_data
def get_module_system_for_user(user, field_data_cache,
# Arguments preceding this comment have user binding, those following don't
descriptor, course_id, track_function, xqueue_callback_url_prefix,
request_token, position=None, wrap_xmodule_display=True, grade_bucket_type=None,
static_asset_path='', user_location=None):
"""
Helper function that returns a module system and student_data bound to a user and a descriptor.
The purpose of this function is to factor out everywhere a user is implicitly bound when creating a module,
to allow an existing module to be re-bound to a user. Most of the user bindings happen when creating the
closures that feed the instantiation of ModuleSystem.
The arguments fall into two categories: those that have explicit or implicit user binding, which are user
and field_data_cache, and those don't and are just present so that ModuleSystem can be instantiated, which
are all the other arguments. Ultimately, this isn't too different than how get_module_for_descriptor_internal
was before refactoring.
Arguments:
see arguments for get_module()
request_token (str): A token unique to the request use by xblock initialization
Returns:
(LmsModuleSystem, KvsFieldData): (module system, student_data) bound to, primarily, the user and descriptor
"""
student_data = KvsFieldData(DjangoKeyValueStore(field_data_cache))
def make_xqueue_callback(dispatch='score_update'):
# Fully qualified callback URL for external queueing system
relative_xqueue_callback_url = reverse(
'xqueue_callback',
kwargs=dict(
course_id=course_id.to_deprecated_string(),
userid=str(user.id),
mod_id=descriptor.location.to_deprecated_string(),
dispatch=dispatch
),
)
return xqueue_callback_url_prefix + relative_xqueue_callback_url
# Default queuename is course-specific and is derived from the course that
# contains the current module.
# TODO: Queuename should be derived from 'course_settings.json' of each course
xqueue_default_queuename = descriptor.location.org + '-' + descriptor.location.course
xqueue = {
'interface': XQUEUE_INTERFACE,
'construct_callback': make_xqueue_callback,
'default_queuename': xqueue_default_queuename.replace(' ', '_'),
'waittime': settings.XQUEUE_WAITTIME_BETWEEN_REQUESTS
}
# This is a hacky way to pass settings to the combined open ended xmodule
# It needs an S3 interface to upload images to S3
# It needs the open ended grading interface in order to get peer grading to be done
# this first checks to see if the descriptor is the correct one, and only sends settings if it is
# Get descriptor metadata fields indicating needs for various settings
needs_open_ended_interface = getattr(descriptor, "needs_open_ended_interface", False)
needs_s3_interface = getattr(descriptor, "needs_s3_interface", False)
# Initialize interfaces to None
open_ended_grading_interface = None
s3_interface = None
# Create interfaces if needed
if needs_open_ended_interface:
open_ended_grading_interface = settings.OPEN_ENDED_GRADING_INTERFACE
open_ended_grading_interface['mock_peer_grading'] = settings.MOCK_PEER_GRADING
open_ended_grading_interface['mock_staff_grading'] = settings.MOCK_STAFF_GRADING
if needs_s3_interface:
s3_interface = {
'access_key': getattr(settings, 'AWS_ACCESS_KEY_ID', ''),
'secret_access_key': getattr(settings, 'AWS_SECRET_ACCESS_KEY', ''),
'storage_bucket_name': getattr(settings, 'AWS_STORAGE_BUCKET_NAME', 'openended')
}
def inner_get_module(descriptor):
"""
Delegate to get_module_for_descriptor_internal() with all values except `descriptor` set.
Because it does an access check, it may return None.
"""
# TODO: fix this so that make_xqueue_callback uses the descriptor passed into
# inner_get_module, not the parent's callback. Add it as an argument....
return get_module_for_descriptor_internal(
user=user,
descriptor=descriptor,
field_data_cache=field_data_cache,
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,
)
def _fulfill_content_milestones(user, course_key, content_key):
"""
Internal helper to handle milestone fulfillments for the specified content module
"""
# Fulfillment Use Case: Entrance Exam
# If this module is part of an entrance exam, we'll need to see if the student
# has reached the point at which they can collect the associated milestone
if settings.FEATURES.get('ENTRANCE_EXAMS', False):
course = modulestore().get_course(course_key)
content = modulestore().get_item(content_key)
entrance_exam_enabled = getattr(course, 'entrance_exam_enabled', False)
in_entrance_exam = getattr(content, 'in_entrance_exam', False)
if entrance_exam_enabled and in_entrance_exam:
# We don't have access to the true request object in this context, but we can use a mock
request = RequestFactory().request()
request.user = user
exam_pct = get_entrance_exam_score(request, course)
if exam_pct >= course.entrance_exam_minimum_score_pct:
exam_key = UsageKey.from_string(course.entrance_exam_id)
relationship_types = milestones_helpers.get_milestone_relationship_types()
content_milestones = milestones_helpers.get_course_content_milestones(
course_key,
exam_key,
relationship=relationship_types['FULFILLS']
)
# Add each milestone to the user's set...
user = {'id': request.user.id}
for milestone in content_milestones:
milestones_helpers.add_user_milestone(user, milestone)
def handle_grade_event(block, event_type, event): # pylint: disable=unused-argument
"""
Manages the workflow for recording and updating of student module grade state
"""
user_id = event.get('user_id', user.id)
# Construct the key for the module
key = KeyValueStore.Key(
scope=Scope.user_state,
user_id=user_id,
block_scope_id=descriptor.location,
field_name='grade'
)
student_module = field_data_cache.find_or_create(key)
# Update the grades
student_module.grade = event.get('value')
student_module.max_grade = event.get('max_value')
# Save all changes to the underlying KeyValueStore
student_module.save()
# Bin score into range and increment stats
score_bucket = get_score_bucket(student_module.grade, student_module.max_grade)
tags = [
u"org:{}".format(course_id.org),
u"course:{}".format(course_id),
u"score_bucket:{0}".format(score_bucket)
]
if grade_bucket_type is not None:
tags.append('type:%s' % grade_bucket_type)
dog_stats_api.increment("lms.courseware.question_answered", tags=tags)
# Cycle through the milestone fulfillment scenarios to see if any are now applicable
# thanks to the updated grading information that was just submitted
_fulfill_content_milestones(
user,
course_id,
descriptor.location,
)
def publish(block, event_type, event):
"""A function that allows XModules to publish events."""
if event_type == 'grade':
handle_grade_event(block, event_type, event)
else:
track_function(event_type, event)
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(),
)
(inner_system, inner_student_data) = get_module_system_for_user(
user=real_user,
field_data_cache=field_data_cache_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
)
# rebinds module to a different student. We'll change system, student_data, and scope_ids
module.descriptor.bind_for_student(
inner_system,
LmsFieldData(module.descriptor._field_data, inner_student_data), # pylint: disable=protected-access
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
# Build a list of wrapping functions that will be applied in order
# to the Fragment content coming out of the xblocks that are about to be rendered.
block_wrappers = []
# Wrap the output display in a single div to allow for the XModule
# javascript to be bound correctly
if wrap_xmodule_display is True:
block_wrappers.append(partial(
wrap_xblock,
'LmsRuntime',
extra_data={'course-id': course_id.to_deprecated_string()},
usage_id_serializer=lambda usage_id: quote_slashes(usage_id.to_deprecated_string()),
request_token=request_token,
))
# TODO (cpennington): When modules are shared between courses, the static
# prefix is going to have to be specific to the module, not the directory
# that the xml was loaded from
# Rewrite urls beginning in /static to point to course-specific content
block_wrappers.append(partial(
replace_static_urls,
getattr(descriptor, 'data_dir', None),
course_id=course_id,
static_asset_path=static_asset_path or descriptor.static_asset_path
))
# Allow URLs of the form '/course/' refer to the root of multicourse directory
# hierarchy of this course
block_wrappers.append(partial(replace_course_urls, course_id))
# this will rewrite intra-courseware links (/jump_to_id/<id>). This format
# is an improvement over the /course/... format for studio authored courses,
# because it is agnostic to course-hierarchy.
# NOTE: module_id is empty string here. The 'module_id' will get assigned in the replacement
# function, we just need to specify something to get the reverse() to work.
block_wrappers.append(partial(
replace_jump_to_id_urls,
course_id,
reverse('jump_to_id', kwargs={'course_id': course_id.to_deprecated_string(), 'module_id': ''}),
))
if settings.FEATURES.get('DISPLAY_DEBUG_INFO_TO_STAFF'):
if has_access(user, 'staff', descriptor, course_id):
has_instructor_access = has_access(user, 'instructor', descriptor, course_id)
block_wrappers.append(partial(add_staff_markup, user, has_instructor_access))
# These modules store data using the anonymous_student_id as a key.
# To prevent loss of data, we will continue to provide old modules with
# the per-student anonymized id (as we have in the past),
# while giving selected modules a per-course anonymized id.
# As we have the time to manually test more modules, we can add to the list
# of modules that get the per-course anonymized id.
is_pure_xblock = isinstance(descriptor, XBlock) and not isinstance(descriptor, XModuleDescriptor)
module_class = getattr(descriptor, 'module_class', None)
is_lti_module = not is_pure_xblock and issubclass(module_class, LTIModule)
if is_pure_xblock or is_lti_module:
anonymous_student_id = anonymous_id_for_user(user, course_id)
else:
anonymous_student_id = anonymous_id_for_user(user, None)
field_data = LmsFieldData(descriptor._field_data, student_data) # pylint: disable=protected-access
user_is_staff = has_access(user, u'staff', descriptor.location, course_id)
system = LmsModuleSystem(
track_function=track_function,
render_template=render_to_string,
static_url=settings.STATIC_URL,
xqueue=xqueue,
# TODO (cpennington): Figure out how to share info between systems
filestore=descriptor.runtime.resources_fs,
get_module=inner_get_module,
user=user,
debug=settings.DEBUG,
hostname=settings.SITE_NAME,
# TODO (cpennington): This should be removed when all html from
# a module is coming through get_html and is therefore covered
# by the replace_static_urls code below
replace_urls=partial(
static_replace.replace_static_urls,
data_directory=getattr(descriptor, 'data_dir', None),
course_id=course_id,
static_asset_path=static_asset_path or descriptor.static_asset_path,
),
replace_course_urls=partial(
static_replace.replace_course_urls,
course_key=course_id
),
replace_jump_to_id_urls=partial(
static_replace.replace_jump_to_id_urls,
course_id=course_id,
jump_to_id_base_url=reverse('jump_to_id', kwargs={'course_id': course_id.to_deprecated_string(), 'module_id': ''})
),
node_path=settings.NODE_PATH,
publish=publish,
anonymous_student_id=anonymous_student_id,
course_id=course_id,
open_ended_grading_interface=open_ended_grading_interface,
s3_interface=s3_interface,
cache=cache,
can_execute_unsafe_code=(lambda: can_execute_unsafe_code(course_id)),
get_python_lib_zip=(lambda: get_python_lib_zip(contentstore, course_id)),
# TODO: When we merge the descriptor and module systems, we can stop reaching into the mixologist (cpennington)
mixins=descriptor.runtime.mixologist._mixins, # pylint: disable=protected-access
wrappers=block_wrappers,
get_real_user=user_by_anonymous_id,
services={
'i18n': ModuleI18nService(),
'fs': xblock.reference.plugins.FSService(),
'field-data': field_data,
'user': DjangoXBlockUserService(user, user_is_staff=user_is_staff),
},
get_user_role=lambda: get_user_role(user, course_id),
descriptor_runtime=descriptor._runtime, # pylint: disable=protected-access
rebind_noauth_module_to_user=rebind_noauth_module_to_user,
user_location=user_location,
request_token=request_token,
)
# pass position specified in URL to module through ModuleSystem
if position is not None:
try:
position = int(position)
except (ValueError, TypeError):
log.exception('Non-integer %r passed as position.', position)
position = None
system.set('position', position)
if settings.FEATURES.get('ENABLE_PSYCHOMETRICS') and user.is_authenticated():
system.set(
'psychometrics_handler', # set callback for updating PsychometricsData
make_psychometrics_data_update_handler(course_id, user, descriptor.location)
)
system.set(u'user_is_staff', user_is_staff)
system.set(u'user_is_admin', has_access(user, u'staff', 'global'))
system.set(u'user_is_beta_tester', CourseBetaTesterRole(course_id).has_user(user))
system.set(u'days_early_for_beta', getattr(descriptor, 'days_early_for_beta'))
# make an ErrorDescriptor -- assuming that the descriptor's system is ok
if has_access(user, u'staff', descriptor.location, course_id):
system.error_descriptor_class = ErrorDescriptor
else:
system.error_descriptor_class = NonStaffErrorDescriptor
return system, field_data
def get_module_for_descriptor_internal(user, descriptor, field_data_cache, course_id,
track_function, xqueue_callback_url_prefix,
position=None, wrap_xmodule_display=True, grade_bucket_type=None,
static_asset_path=''):
"""
Actually implement get_module, without requiring a request.
See get_module() docstring for further details.
"""
# Do not check access when it's a noauth request.
if getattr(user, 'known', True):
# Short circuit--if the user shouldn't have access, bail without doing any work
if not has_access(user, descriptor, 'load', course_id):
return None
student_data = KvsFieldData(DjangoKeyValueStore(field_data_cache))
descriptor._field_data = LmsFieldData(descriptor._field_data, student_data)
def make_xqueue_callback(dispatch='score_update'):
# Fully qualified callback URL for external queueing system
relative_xqueue_callback_url = reverse(
'xqueue_callback',
kwargs=dict(
course_id=course_id,
userid=str(user.id),
mod_id=descriptor.location.url(),
dispatch=dispatch
),
)
return xqueue_callback_url_prefix + relative_xqueue_callback_url
# Default queuename is course-specific and is derived from the course that
# contains the current module.
# TODO: Queuename should be derived from 'course_settings.json' of each course
xqueue_default_queuename = descriptor.location.org + '-' + descriptor.location.course
xqueue = {
'interface': xqueue_interface,
'construct_callback': make_xqueue_callback,
'default_queuename': xqueue_default_queuename.replace(' ', '_'),
'waittime': settings.XQUEUE_WAITTIME_BETWEEN_REQUESTS
}
# This is a hacky way to pass settings to the combined open ended xmodule
# It needs an S3 interface to upload images to S3
# It needs the open ended grading interface in order to get peer grading to be done
# this first checks to see if the descriptor is the correct one, and only sends settings if it is
# Get descriptor metadata fields indicating needs for various settings
needs_open_ended_interface = getattr(descriptor, "needs_open_ended_interface", False)
needs_s3_interface = getattr(descriptor, "needs_s3_interface", False)
# Initialize interfaces to None
open_ended_grading_interface = None
s3_interface = None
# Create interfaces if needed
if needs_open_ended_interface:
open_ended_grading_interface = settings.OPEN_ENDED_GRADING_INTERFACE
open_ended_grading_interface['mock_peer_grading'] = settings.MOCK_PEER_GRADING
open_ended_grading_interface['mock_staff_grading'] = settings.MOCK_STAFF_GRADING
if needs_s3_interface:
s3_interface = {
'access_key': getattr(settings, 'AWS_ACCESS_KEY_ID', ''),
'secret_access_key': getattr(settings, 'AWS_SECRET_ACCESS_KEY', ''),
'storage_bucket_name': getattr(settings, 'AWS_STORAGE_BUCKET_NAME', 'openended')
}
def inner_get_module(descriptor):
"""
Delegate to get_module_for_descriptor_internal() with all values except `descriptor` set.
Because it does an access check, it may return None.
"""
# TODO: fix this so that make_xqueue_callback uses the descriptor passed into
# inner_get_module, not the parent's callback. Add it as an argument....
return get_module_for_descriptor_internal(user, descriptor, field_data_cache, course_id,
track_function, make_xqueue_callback,
position, wrap_xmodule_display, grade_bucket_type,
static_asset_path)
def publish(block, event, custom_user=None):
"""A function that allows XModules to publish events. This only supports grade changes right now."""
if event.get('event_name') != 'grade':
return
if custom_user:
user_id = custom_user.id
else:
user_id = user.id
# Construct the key for the module
key = KeyValueStore.Key(
scope=Scope.user_state,
user_id=user_id,
block_scope_id=descriptor.location,
field_name='grade'
)
student_module = field_data_cache.find_or_create(key)
# Update the grades
student_module.grade = event.get('value')
student_module.max_grade = event.get('max_value')
# Save all changes to the underlying KeyValueStore
student_module.save()
# Bin score into range and increment stats
score_bucket = get_score_bucket(student_module.grade, student_module.max_grade)
org, course_num, run = course_id.split("/")
tags = [
u"org:{0}".format(org),
u"course:{0}".format(course_num),
u"run:{0}".format(run),
u"score_bucket:{0}".format(score_bucket)
]
if grade_bucket_type is not None:
tags.append('type:%s' % grade_bucket_type)
dog_stats_api.increment("lms.courseware.question_answered", tags=tags)
# Build a list of wrapping functions that will be applied in order
# to the Fragment content coming out of the xblocks that are about to be rendered.
block_wrappers = []
# Wrap the output display in a single div to allow for the XModule
# javascript to be bound correctly
if wrap_xmodule_display is True:
block_wrappers.append(partial(wrap_xblock, 'LmsRuntime', extra_data={'course-id': course_id}))
# TODO (cpennington): When modules are shared between courses, the static
# prefix is going to have to be specific to the module, not the directory
# that the xml was loaded from
# Rewrite urls beginning in /static to point to course-specific content
block_wrappers.append(partial(
replace_static_urls,
getattr(descriptor, 'data_dir', None),
course_id=course_id,
static_asset_path=static_asset_path or descriptor.static_asset_path
))
# Allow URLs of the form '/course/' refer to the root of multicourse directory
# hierarchy of this course
block_wrappers.append(partial(replace_course_urls, course_id))
# this will rewrite intra-courseware links (/jump_to_id/<id>). This format
# is an improvement over the /course/... format for studio authored courses,
# because it is agnostic to course-hierarchy.
# NOTE: module_id is empty string here. The 'module_id' will get assigned in the replacement
# function, we just need to specify something to get the reverse() to work.
block_wrappers.append(partial(
replace_jump_to_id_urls,
course_id,
reverse('jump_to_id', kwargs={'course_id': course_id, 'module_id': ''}),
))
if settings.FEATURES.get('DISPLAY_HISTOGRAMS_TO_STAFF'):
if has_access(user, descriptor, 'staff', course_id):
block_wrappers.append(partial(add_histogram, user))
# These modules store data using the anonymous_student_id as a key.
# To prevent loss of data, we will continue to provide old modules with
# the per-student anonymized id (as we have in the past),
# while giving selected modules a per-course anonymized id.
# As we have the time to manually test more modules, we can add to the list
# of modules that get the per-course anonymized id.
is_pure_xblock = isinstance(descriptor, XBlock) and not isinstance(descriptor, XModuleDescriptor)
module_class = getattr(descriptor, 'module_class', None)
is_lti_module = not is_pure_xblock and issubclass(module_class, LTIModule)
if is_pure_xblock or is_lti_module:
anonymous_student_id = anonymous_id_for_user(user, course_id)
else:
anonymous_student_id = anonymous_id_for_user(user, '')
system = LmsModuleSystem(
track_function=track_function,
render_template=render_to_string,
static_url=settings.STATIC_URL,
xqueue=xqueue,
# TODO (cpennington): Figure out how to share info between systems
filestore=descriptor.runtime.resources_fs,
get_module=inner_get_module,
user=user,
debug=settings.DEBUG,
hostname=settings.SITE_NAME,
# TODO (cpennington): This should be removed when all html from
# a module is coming through get_html and is therefore covered
# by the replace_static_urls code below
replace_urls=partial(
static_replace.replace_static_urls,
data_directory=getattr(descriptor, 'data_dir', None),
course_id=course_id,
static_asset_path=static_asset_path or descriptor.static_asset_path,
),
replace_course_urls=partial(
static_replace.replace_course_urls,
course_id=course_id
),
replace_jump_to_id_urls=partial(
static_replace.replace_jump_to_id_urls,
course_id=course_id,
jump_to_id_base_url=reverse('jump_to_id', kwargs={'course_id': course_id, 'module_id': ''})
),
node_path=settings.NODE_PATH,
publish=publish,
anonymous_student_id=anonymous_student_id,
course_id=course_id,
open_ended_grading_interface=open_ended_grading_interface,
s3_interface=s3_interface,
cache=cache,
can_execute_unsafe_code=(lambda: can_execute_unsafe_code(course_id)),
# TODO: When we merge the descriptor and module systems, we can stop reaching into the mixologist (cpennington)
mixins=descriptor.runtime.mixologist._mixins, # pylint: disable=protected-access
wrappers=block_wrappers,
get_real_user=user_by_anonymous_id,
services={
# django.utils.translation implements the gettext.Translations
# interface (it has ugettext, ungettext, etc), so we can use it
# directly as the runtime i18n service.
'i18n': django.utils.translation,
},
get_user_role=lambda: get_user_role(user, course_id),
)
# pass position specified in URL to module through ModuleSystem
system.set('position', position)
if settings.FEATURES.get('ENABLE_PSYCHOMETRICS'):
system.set(
'psychometrics_handler', # set callback for updating PsychometricsData
make_psychometrics_data_update_handler(course_id, user, descriptor.location.url())
)
system.set(u'user_is_staff', has_access(user, descriptor.location, u'staff', course_id))
# make an ErrorDescriptor -- assuming that the descriptor's system is ok
if has_access(user, descriptor.location, 'staff', course_id):
system.error_descriptor_class = ErrorDescriptor
else:
system.error_descriptor_class = NonStaffErrorDescriptor
descriptor.xmodule_runtime = system
descriptor.scope_ids = descriptor.scope_ids._replace(user_id=user.id)
return descriptor
def test_user_role_anonymous(self):
"""Ensure that user role is student for anonymous user."""
self.assertEqual(
'student',
access.get_user_role(self.anonymous_user, self.course_key)
)
def get_module_system_for_user(
user,
student_data, # TODO # pylint: disable=too-many-statements
# Arguments preceding this comment have user binding, those following don't
descriptor,
course_id,
track_function,
xqueue_callback_url_prefix,
request_token,
position=None,
wrap_xmodule_display=True,
grade_bucket_type=None,
static_asset_path="",
user_location=None,
disable_staff_debug_info=False,
course=None,
):
"""
Helper function that returns a module system and student_data bound to a user and a descriptor.
The purpose of this function is to factor out everywhere a user is implicitly bound when creating a module,
to allow an existing module to be re-bound to a user. Most of the user bindings happen when creating the
closures that feed the instantiation of ModuleSystem.
The arguments fall into two categories: those that have explicit or implicit user binding, which are user
and student_data, and those don't and are just present so that ModuleSystem can be instantiated, which
are all the other arguments. Ultimately, this isn't too different than how get_module_for_descriptor_internal
was before refactoring.
Arguments:
see arguments for get_module()
request_token (str): A token unique to the request use by xblock initialization
Returns:
(LmsModuleSystem, KvsFieldData): (module system, student_data) bound to, primarily, the user and descriptor
"""
def make_xqueue_callback(dispatch="score_update"):
"""
Returns fully qualified callback URL for external queueing system
"""
relative_xqueue_callback_url = reverse(
"xqueue_callback",
kwargs=dict(
course_id=course_id.to_deprecated_string(),
userid=str(user.id),
mod_id=descriptor.location.to_deprecated_string(),
dispatch=dispatch,
),
)
return xqueue_callback_url_prefix + relative_xqueue_callback_url
# Default queuename is course-specific and is derived from the course that
# contains the current module.
# TODO: Queuename should be derived from 'course_settings.json' of each course
xqueue_default_queuename = descriptor.location.org + "-" + descriptor.location.course
xqueue = {
"interface": XQUEUE_INTERFACE,
"construct_callback": make_xqueue_callback,
"default_queuename": xqueue_default_queuename.replace(" ", "_"),
"waittime": settings.XQUEUE_WAITTIME_BETWEEN_REQUESTS,
}
def inner_get_module(descriptor):
"""
Delegate to get_module_for_descriptor_internal() with all values except `descriptor` set.
Because it does an access check, it may return None.
"""
# TODO: fix this so that make_xqueue_callback uses the descriptor passed into
# inner_get_module, not the parent's callback. Add it as an argument....
return get_module_for_descriptor_internal(
user=user,
descriptor=descriptor,
student_data=student_data,
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,
)
def _fulfill_content_milestones(user, course_key, content_key):
"""
Internal helper to handle milestone fulfillments for the specified content module
"""
# Fulfillment Use Case: Entrance Exam
# If this module is part of an entrance exam, we'll need to see if the student
# has reached the point at which they can collect the associated milestone
if milestones_helpers.is_entrance_exams_enabled():
course = modulestore().get_course(course_key)
content = modulestore().get_item(content_key)
entrance_exam_enabled = getattr(course, "entrance_exam_enabled", False)
in_entrance_exam = getattr(content, "in_entrance_exam", False)
if entrance_exam_enabled and in_entrance_exam:
# We don't have access to the true request object in this context, but we can use a mock
request = RequestFactory().request()
request.user = user
exam_pct = get_entrance_exam_score(request, course)
if exam_pct >= course.entrance_exam_minimum_score_pct:
exam_key = UsageKey.from_string(course.entrance_exam_id)
relationship_types = milestones_helpers.get_milestone_relationship_types()
content_milestones = milestones_helpers.get_course_content_milestones(
course_key, exam_key, relationship=relationship_types["FULFILLS"]
)
# Add each milestone to the user's set...
user = {"id": request.user.id}
for milestone in content_milestones:
milestones_helpers.add_user_milestone(user, milestone)
def handle_grade_event(block, event_type, event): # pylint: disable=unused-argument
"""
Manages the workflow for recording and updating of student module grade state
"""
user_id = user.id
grade = event.get("value")
max_grade = event.get("max_value")
set_score(user_id, descriptor.location, grade, max_grade)
# Bin score into range and increment stats
score_bucket = get_score_bucket(grade, max_grade)
tags = [
u"org:{}".format(course_id.org),
u"course:{}".format(course_id),
u"score_bucket:{0}".format(score_bucket),
]
if grade_bucket_type is not None:
tags.append("type:%s" % grade_bucket_type)
dog_stats_api.increment("lms.courseware.question_answered", tags=tags)
# Cycle through the milestone fulfillment scenarios to see if any are now applicable
# thanks to the updated grading information that was just submitted
_fulfill_content_milestones(user, course_id, descriptor.location)
# Send a signal out to any listeners who are waiting for score change
# events.
SCORE_CHANGED.send(
sender=None,
points_possible=event["max_value"],
points_earned=event["value"],
user_id=user_id,
course_id=unicode(course_id),
usage_id=unicode(descriptor.location),
)
def publish(block, event_type, event):
"""A function that allows XModules to publish events."""
if event_type == "grade" and not is_masquerading_as_specific_student(user, course_id):
handle_grade_event(block, event_type, event)
else:
aside_context = {}
for aside in block.runtime.get_asides(block):
if hasattr(aside, "get_event_context"):
aside_event_info = aside.get_event_context(event_type, event)
if aside_event_info is not None:
aside_context[aside.scope_ids.block_type] = aside_event_info
with tracker.get_tracker().context("asides", {"asides": aside_context}):
track_function(event_type, event)
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
# Build a list of wrapping functions that will be applied in order
# to the Fragment content coming out of the xblocks that are about to be rendered.
block_wrappers = []
if is_masquerading_as_specific_student(user, course_id):
block_wrappers.append(filter_displayed_blocks)
if settings.FEATURES.get("LICENSING", False):
block_wrappers.append(wrap_with_license)
# Wrap the output display in a single div to allow for the XModule
# javascript to be bound correctly
if wrap_xmodule_display is True:
block_wrappers.append(
partial(
wrap_xblock,
"LmsRuntime",
extra_data={"course-id": course_id.to_deprecated_string()},
usage_id_serializer=lambda usage_id: quote_slashes(usage_id.to_deprecated_string()),
request_token=request_token,
)
)
# TODO (cpennington): When modules are shared between courses, the static
# prefix is going to have to be specific to the module, not the directory
# that the xml was loaded from
# Rewrite urls beginning in /static to point to course-specific content
block_wrappers.append(
partial(
replace_static_urls,
getattr(descriptor, "data_dir", None),
course_id=course_id,
static_asset_path=static_asset_path or descriptor.static_asset_path,
)
)
# Allow URLs of the form '/course/' refer to the root of multicourse directory
# hierarchy of this course
block_wrappers.append(partial(replace_course_urls, course_id))
# this will rewrite intra-courseware links (/jump_to_id/<id>). This format
# is an improvement over the /course/... format for studio authored courses,
# because it is agnostic to course-hierarchy.
# NOTE: module_id is empty string here. The 'module_id' will get assigned in the replacement
# function, we just need to specify something to get the reverse() to work.
block_wrappers.append(
partial(
replace_jump_to_id_urls,
course_id,
reverse("jump_to_id", kwargs={"course_id": course_id.to_deprecated_string(), "module_id": ""}),
)
)
if settings.FEATURES.get("DISPLAY_DEBUG_INFO_TO_STAFF"):
if is_masquerading_as_specific_student(user, course_id):
# When masquerading as a specific student, we want to show the debug button
# unconditionally to enable resetting the state of the student we are masquerading as.
# We already know the user has staff access when masquerading is active.
staff_access = True
# To figure out whether the user has instructor access, we temporarily remove the
# masquerade_settings from the real_user. With the masquerading settings in place,
# the result would always be "False".
masquerade_settings = user.real_user.masquerade_settings
del user.real_user.masquerade_settings
instructor_access = bool(has_access(user.real_user, "instructor", descriptor, course_id))
user.real_user.masquerade_settings = masquerade_settings
else:
staff_access = has_access(user, "staff", descriptor, course_id)
instructor_access = bool(has_access(user, "instructor", descriptor, course_id))
if staff_access:
block_wrappers.append(partial(add_staff_markup, user, instructor_access, disable_staff_debug_info))
# These modules store data using the anonymous_student_id as a key.
# To prevent loss of data, we will continue to provide old modules with
# the per-student anonymized id (as we have in the past),
# while giving selected modules a per-course anonymized id.
# As we have the time to manually test more modules, we can add to the list
# of modules that get the per-course anonymized id.
is_pure_xblock = isinstance(descriptor, XBlock) and not isinstance(descriptor, XModuleDescriptor)
module_class = getattr(descriptor, "module_class", None)
is_lti_module = not is_pure_xblock and issubclass(module_class, LTIModule)
if is_pure_xblock or is_lti_module:
anonymous_student_id = anonymous_id_for_user(user, course_id)
else:
anonymous_student_id = anonymous_id_for_user(user, None)
field_data = LmsFieldData(descriptor._field_data, student_data) # pylint: disable=protected-access
user_is_staff = bool(has_access(user, u"staff", descriptor.location, course_id))
system = LmsModuleSystem(
track_function=track_function,
render_template=render_to_string,
static_url=settings.STATIC_URL,
xqueue=xqueue,
# TODO (cpennington): Figure out how to share info between systems
filestore=descriptor.runtime.resources_fs,
get_module=inner_get_module,
user=user,
debug=settings.DEBUG,
hostname=settings.SITE_NAME,
# TODO (cpennington): This should be removed when all html from
# a module is coming through get_html and is therefore covered
# by the replace_static_urls code below
replace_urls=partial(
static_replace.replace_static_urls,
data_directory=getattr(descriptor, "data_dir", None),
course_id=course_id,
static_asset_path=static_asset_path or descriptor.static_asset_path,
),
replace_course_urls=partial(static_replace.replace_course_urls, course_key=course_id),
replace_jump_to_id_urls=partial(
static_replace.replace_jump_to_id_urls,
course_id=course_id,
jump_to_id_base_url=reverse(
"jump_to_id", kwargs={"course_id": course_id.to_deprecated_string(), "module_id": ""}
),
),
node_path=settings.NODE_PATH,
publish=publish,
anonymous_student_id=anonymous_student_id,
course_id=course_id,
cache=cache,
can_execute_unsafe_code=(lambda: can_execute_unsafe_code(course_id)),
get_python_lib_zip=(lambda: get_python_lib_zip(contentstore, course_id)),
# TODO: When we merge the descriptor and module systems, we can stop reaching into the mixologist (cpennington)
mixins=descriptor.runtime.mixologist._mixins, # pylint: disable=protected-access
wrappers=block_wrappers,
get_real_user=user_by_anonymous_id,
services={
"fs": FSService(),
"field-data": field_data,
"user": DjangoXBlockUserService(user, user_is_staff=user_is_staff),
"reverification": ReverificationService(),
"proctoring": ProctoringService(),
"credit": CreditService(),
"bookmarks": BookmarksService(user=user),
},
get_user_role=lambda: get_user_role(user, course_id),
descriptor_runtime=descriptor._runtime, # pylint: disable=protected-access
rebind_noauth_module_to_user=rebind_noauth_module_to_user,
user_location=user_location,
request_token=request_token,
)
# pass position specified in URL to module through ModuleSystem
if position is not None:
try:
position = int(position)
except (ValueError, TypeError):
log.exception("Non-integer %r passed as position.", position)
position = None
system.set("position", position)
system.set(u"user_is_staff", user_is_staff)
system.set(u"user_is_admin", bool(has_access(user, u"staff", "global")))
system.set(u"user_is_beta_tester", CourseBetaTesterRole(course_id).has_user(user))
system.set(u"days_early_for_beta", descriptor.days_early_for_beta)
# make an ErrorDescriptor -- assuming that the descriptor's system is ok
if has_access(user, u"staff", descriptor.location, course_id):
system.error_descriptor_class = ErrorDescriptor
else:
system.error_descriptor_class = NonStaffErrorDescriptor
return system, field_data
def get_module_system_for_user(
user,
field_data_cache,
# Arguments preceding this comment have user binding, those following don't
descriptor,
course_id,
track_function,
xqueue_callback_url_prefix,
position=None,
wrap_xmodule_display=True,
grade_bucket_type=None,
static_asset_path="",
):
"""
Helper function that returns a module system and student_data bound to a user and a descriptor.
The purpose of this function is to factor out everywhere a user is implicitly bound when creating a module,
to allow an existing module to be re-bound to a user. Most of the user bindings happen when creating the
closures that feed the instantiation of ModuleSystem.
The arguments fall into two categories: those that have explicit or implicit user binding, which are user
and field_data_cache, and those don't and are just present so that ModuleSystem can be instantiated, which
are all the other arguments. Ultimately, this isn't too different than how get_module_for_descriptor_internal
was before refactoring.
Arguments:
see arguments for get_module()
Returns:
(LmsModuleSystem, KvsFieldData): (module system, student_data) bound to, primarily, the user and descriptor
"""
student_data = KvsFieldData(DjangoKeyValueStore(field_data_cache))
def make_xqueue_callback(dispatch="score_update"):
# Fully qualified callback URL for external queueing system
relative_xqueue_callback_url = reverse(
"xqueue_callback",
kwargs=dict(
course_id=course_id.to_deprecated_string(),
userid=str(user.id),
mod_id=descriptor.location.to_deprecated_string(),
dispatch=dispatch,
),
)
return xqueue_callback_url_prefix + relative_xqueue_callback_url
# Default queuename is course-specific and is derived from the course that
# contains the current module.
# TODO: Queuename should be derived from 'course_settings.json' of each course
xqueue_default_queuename = descriptor.location.org + "-" + descriptor.location.course
xqueue = {
"interface": XQUEUE_INTERFACE,
"construct_callback": make_xqueue_callback,
"default_queuename": xqueue_default_queuename.replace(" ", "_"),
"waittime": settings.XQUEUE_WAITTIME_BETWEEN_REQUESTS,
}
# This is a hacky way to pass settings to the combined open ended xmodule
# It needs an S3 interface to upload images to S3
# It needs the open ended grading interface in order to get peer grading to be done
# this first checks to see if the descriptor is the correct one, and only sends settings if it is
# Get descriptor metadata fields indicating needs for various settings
needs_open_ended_interface = getattr(descriptor, "needs_open_ended_interface", False)
needs_s3_interface = getattr(descriptor, "needs_s3_interface", False)
# Initialize interfaces to None
open_ended_grading_interface = None
s3_interface = None
# Create interfaces if needed
if needs_open_ended_interface:
open_ended_grading_interface = settings.OPEN_ENDED_GRADING_INTERFACE
open_ended_grading_interface["mock_peer_grading"] = settings.MOCK_PEER_GRADING
open_ended_grading_interface["mock_staff_grading"] = settings.MOCK_STAFF_GRADING
if needs_s3_interface:
s3_interface = {
"access_key": getattr(settings, "AWS_ACCESS_KEY_ID", ""),
"secret_access_key": getattr(settings, "AWS_SECRET_ACCESS_KEY", ""),
"storage_bucket_name": getattr(settings, "AWS_STORAGE_BUCKET_NAME", "openended"),
}
def inner_get_module(descriptor):
"""
Delegate to get_module_for_descriptor_internal() with all values except `descriptor` set.
Because it does an access check, it may return None.
"""
# TODO: fix this so that make_xqueue_callback uses the descriptor passed into
# inner_get_module, not the parent's callback. Add it as an argument....
return get_module_for_descriptor_internal(
user,
descriptor,
field_data_cache,
course_id,
track_function,
make_xqueue_callback,
position,
wrap_xmodule_display,
grade_bucket_type,
static_asset_path,
)
def handle_grade_event(block, event_type, event):
user_id = event.get("user_id", user.id)
# Construct the key for the module
key = KeyValueStore.Key(
scope=Scope.user_state, user_id=user_id, block_scope_id=descriptor.location, field_name="grade"
)
student_module = field_data_cache.find_or_create(key)
# Update the grades
student_module.grade = event.get("value")
student_module.max_grade = event.get("max_value")
# Save all changes to the underlying KeyValueStore
student_module.save()
# Bin score into range and increment stats
score_bucket = get_score_bucket(student_module.grade, student_module.max_grade)
tags = [
u"org:{}".format(course_id.org),
u"course:{}".format(course_id),
u"score_bucket:{0}".format(score_bucket),
]
if grade_bucket_type is not None:
tags.append("type:%s" % grade_bucket_type)
dog_stats_api.increment("lms.courseware.question_answered", tags=tags)
def publish(block, event_type, event):
"""A function that allows XModules to publish events."""
if event_type == "grade":
handle_grade_event(block, event_type, event)
else:
track_function(event_type, event)
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
)
(inner_system, inner_student_data) = get_module_system_for_user(
real_user,
field_data_cache_real_user, # These have implicit user bindings, rest of args considered not to
module.descriptor,
course_id,
track_function,
xqueue_callback_url_prefix,
position,
wrap_xmodule_display,
grade_bucket_type,
static_asset_path,
)
# rebinds module to a different student. We'll change system, student_data, and scope_ids
module.descriptor.bind_for_student(
inner_system,
LmsFieldData(module.descriptor._field_data, inner_student_data), # pylint: disable=protected-access
)
module.descriptor.scope_ids = module.descriptor.scope_ids._replace(
user_id=real_user.id
) # pylint: disable=protected-access
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
# Build a list of wrapping functions that will be applied in order
# to the Fragment content coming out of the xblocks that are about to be rendered.
block_wrappers = []
# Wrap the output display in a single div to allow for the XModule
# javascript to be bound correctly
if wrap_xmodule_display is True:
block_wrappers.append(
partial(
wrap_xblock,
"LmsRuntime",
extra_data={"course-id": course_id.to_deprecated_string()},
usage_id_serializer=lambda usage_id: quote_slashes(usage_id.to_deprecated_string()),
)
)
# TODO (cpennington): When modules are shared between courses, the static
# prefix is going to have to be specific to the module, not the directory
# that the xml was loaded from
# Rewrite urls beginning in /static to point to course-specific content
block_wrappers.append(
partial(
replace_static_urls,
getattr(descriptor, "data_dir", None),
course_id=course_id,
static_asset_path=static_asset_path or descriptor.static_asset_path,
)
)
# Allow URLs of the form '/course/' refer to the root of multicourse directory
# hierarchy of this course
block_wrappers.append(partial(replace_course_urls, course_id))
# this will rewrite intra-courseware links (/jump_to_id/<id>). This format
# is an improvement over the /course/... format for studio authored courses,
# because it is agnostic to course-hierarchy.
# NOTE: module_id is empty string here. The 'module_id' will get assigned in the replacement
# function, we just need to specify something to get the reverse() to work.
block_wrappers.append(
partial(
replace_jump_to_id_urls,
course_id,
reverse("jump_to_id", kwargs={"course_id": course_id.to_deprecated_string(), "module_id": ""}),
)
)
if settings.FEATURES.get("DISPLAY_DEBUG_INFO_TO_STAFF"):
if has_access(user, "staff", descriptor, course_id):
has_instructor_access = has_access(user, "instructor", descriptor, course_id)
block_wrappers.append(partial(add_staff_markup, user, has_instructor_access))
# These modules store data using the anonymous_student_id as a key.
# To prevent loss of data, we will continue to provide old modules with
# the per-student anonymized id (as we have in the past),
# while giving selected modules a per-course anonymized id.
# As we have the time to manually test more modules, we can add to the list
# of modules that get the per-course anonymized id.
is_pure_xblock = isinstance(descriptor, XBlock) and not isinstance(descriptor, XModuleDescriptor)
module_class = getattr(descriptor, "module_class", None)
is_lti_module = not is_pure_xblock and issubclass(module_class, LTIModule)
if is_pure_xblock or is_lti_module:
anonymous_student_id = anonymous_id_for_user(user, course_id)
else:
anonymous_student_id = anonymous_id_for_user(user, None)
system = LmsModuleSystem(
track_function=track_function,
render_template=render_to_string,
static_url=settings.STATIC_URL,
xqueue=xqueue,
# TODO (cpennington): Figure out how to share info between systems
filestore=descriptor.runtime.resources_fs,
get_module=inner_get_module,
user=user,
debug=settings.DEBUG,
hostname=settings.SITE_NAME,
# TODO (cpennington): This should be removed when all html from
# a module is coming through get_html and is therefore covered
# by the replace_static_urls code below
replace_urls=partial(
static_replace.replace_static_urls,
data_directory=getattr(descriptor, "data_dir", None),
course_id=course_id,
static_asset_path=static_asset_path or descriptor.static_asset_path,
),
replace_course_urls=partial(static_replace.replace_course_urls, course_key=course_id),
replace_jump_to_id_urls=partial(
static_replace.replace_jump_to_id_urls,
course_id=course_id,
jump_to_id_base_url=reverse(
"jump_to_id", kwargs={"course_id": course_id.to_deprecated_string(), "module_id": ""}
),
),
node_path=settings.NODE_PATH,
publish=publish,
anonymous_student_id=anonymous_student_id,
course_id=course_id,
open_ended_grading_interface=open_ended_grading_interface,
s3_interface=s3_interface,
cache=cache,
can_execute_unsafe_code=(lambda: can_execute_unsafe_code(course_id)),
# TODO: When we merge the descriptor and module systems, we can stop reaching into the mixologist (cpennington)
mixins=descriptor.runtime.mixologist._mixins, # pylint: disable=protected-access
wrappers=block_wrappers,
get_real_user=user_by_anonymous_id,
services={"i18n": ModuleI18nService()},
get_user_role=lambda: get_user_role(user, course_id),
descriptor_runtime=descriptor.runtime,
rebind_noauth_module_to_user=rebind_noauth_module_to_user,
)
# pass position specified in URL to module through ModuleSystem
system.set("position", position)
if settings.FEATURES.get("ENABLE_PSYCHOMETRICS"):
system.set(
"psychometrics_handler", # set callback for updating PsychometricsData
make_psychometrics_data_update_handler(course_id, user, descriptor.location),
)
system.set(u"user_is_staff", has_access(user, u"staff", descriptor.location, course_id))
system.set(u"user_is_admin", has_access(user, u"staff", "global"))
# make an ErrorDescriptor -- assuming that the descriptor's system is ok
if has_access(user, u"staff", descriptor.location, course_id):
system.error_descriptor_class = ErrorDescriptor
else:
system.error_descriptor_class = NonStaffErrorDescriptor
return system, student_data
def test_user_role_anonymous(self):
"""Ensure that user role is student for anonymous user."""
self.assertEqual("student", access.get_user_role(self.anonymous_user, self.course_key))
def get_module_system_for_user(
user,
student_data, # TODO # pylint: disable=too-many-statements
# Arguments preceding this comment have user binding, those following don't
descriptor,
course_id,
track_function,
xqueue_callback_url_prefix,
request_token,
position=None,
wrap_xmodule_display=True,
grade_bucket_type=None,
static_asset_path='',
user_location=None,
disable_staff_debug_info=False,
course=None
):
"""
Helper function that returns a module system and student_data bound to a user and a descriptor.
The purpose of this function is to factor out everywhere a user is implicitly bound when creating a module,
to allow an existing module to be re-bound to a user. Most of the user bindings happen when creating the
closures that feed the instantiation of ModuleSystem.
The arguments fall into two categories: those that have explicit or implicit user binding, which are user
and student_data, and those don't and are just present so that ModuleSystem can be instantiated, which
are all the other arguments. Ultimately, this isn't too different than how get_module_for_descriptor_internal
was before refactoring.
Arguments:
see arguments for get_module()
request_token (str): A token unique to the request use by xblock initialization
Returns:
(LmsModuleSystem, KvsFieldData): (module system, student_data) bound to, primarily, the user and descriptor
"""
def make_xqueue_callback(dispatch='score_update'):
"""
Returns fully qualified callback URL for external queueing system
"""
relative_xqueue_callback_url = reverse(
'xqueue_callback',
kwargs=dict(
course_id=course_id.to_deprecated_string(),
userid=str(user.id),
mod_id=descriptor.location.to_deprecated_string(),
dispatch=dispatch
),
)
return xqueue_callback_url_prefix + relative_xqueue_callback_url
# Default queuename is course-specific and is derived from the course that
# contains the current module.
# TODO: Queuename should be derived from 'course_settings.json' of each course
xqueue_default_queuename = descriptor.location.org + '-' + descriptor.location.course
xqueue = {
'interface': XQUEUE_INTERFACE,
'construct_callback': make_xqueue_callback,
'default_queuename': xqueue_default_queuename.replace(' ', '_'),
'waittime': settings.XQUEUE_WAITTIME_BETWEEN_REQUESTS
}
def inner_get_module(descriptor):
"""
Delegate to get_module_for_descriptor_internal() with all values except `descriptor` set.
Because it does an access check, it may return None.
"""
# TODO: fix this so that make_xqueue_callback uses the descriptor passed into
# inner_get_module, not the parent's callback. Add it as an argument....
return get_module_for_descriptor_internal(
user=user,
descriptor=descriptor,
student_data=student_data,
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
)
def get_event_handler(event_type):
"""
Return an appropriate function to handle the event.
Returns None if no special processing is required.
"""
handlers = {
'completion': handle_completion_event,
'grade': handle_grade_event,
'progress': handle_deprecated_progress_event,
}
return handlers.get(event_type)
def publish(block, event_type, event):
"""
A function that allows XModules to publish events.
"""
handle_event = get_event_handler(event_type)
if handle_event and not is_masquerading_as_specific_student(user, course_id):
handle_event(block, event)
else:
context = contexts.course_context_from_course_id(course_id)
if block.runtime.user_id:
context['user_id'] = block.runtime.user_id
context['asides'] = {}
for aside in block.runtime.get_asides(block):
if hasattr(aside, 'get_event_context'):
aside_event_info = aside.get_event_context(event_type, event)
if aside_event_info is not None:
context['asides'][aside.scope_ids.block_type] = aside_event_info
with tracker.get_tracker().context(event_type, context):
track_function(event_type, event)
def handle_completion_event(block, event):
"""
Submit a completion object for the block.
"""
if not completion_waffle.waffle().is_enabled(completion_waffle.ENABLE_COMPLETION_TRACKING):
raise Http404
else:
BlockCompletion.objects.submit_completion(
user=user,
course_key=course_id,
block_key=block.scope_ids.usage_id,
completion=event['completion'],
)
def handle_grade_event(block, event):
"""
Submit a grade for the block.
"""
SCORE_PUBLISHED.send(
sender=None,
block=block,
user=user,
raw_earned=event['value'],
raw_possible=event['max_value'],
only_if_higher=event.get('only_if_higher'),
score_deleted=event.get('score_deleted'),
)
def handle_deprecated_progress_event(block, event):
"""
DEPRECATED: Submit a completion for the block represented by the
progress event.
This exists to support the legacy progress extension used by
edx-solutions. New XBlocks should not emit these events, but instead
emit completion events directly.
"""
if not completion_waffle.waffle().is_enabled(completion_waffle.ENABLE_COMPLETION_TRACKING):
raise Http404
else:
requested_user_id = event.get('user_id', user.id)
if requested_user_id != user.id:
log.warning("{} tried to submit a completion on behalf of {}".format(user, requested_user_id))
return
BlockCompletion.objects.submit_completion(
user=user,
course_key=course_id,
block_key=block.scope_ids.usage_id,
completion=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
# Build a list of wrapping functions that will be applied in order
# to the Fragment content coming out of the xblocks that are about to be rendered.
block_wrappers = []
if is_masquerading_as_specific_student(user, course_id):
block_wrappers.append(filter_displayed_blocks)
if settings.FEATURES.get("LICENSING", False):
block_wrappers.append(wrap_with_license)
# Wrap the output display in a single div to allow for the XModule
# javascript to be bound correctly
if wrap_xmodule_display is True:
block_wrappers.append(partial(
wrap_xblock,
'LmsRuntime',
extra_data={'course-id': course_id.to_deprecated_string()},
usage_id_serializer=lambda usage_id: quote_slashes(usage_id.to_deprecated_string()),
request_token=request_token,
))
# TODO (cpennington): When modules are shared between courses, the static
# prefix is going to have to be specific to the module, not the directory
# that the xml was loaded from
# Rewrite urls beginning in /static to point to course-specific content
block_wrappers.append(partial(
replace_static_urls,
getattr(descriptor, 'data_dir', None),
course_id=course_id,
static_asset_path=static_asset_path or descriptor.static_asset_path
))
# Allow URLs of the form '/course/' refer to the root of multicourse directory
# hierarchy of this course
block_wrappers.append(partial(replace_course_urls, course_id))
# this will rewrite intra-courseware links (/jump_to_id/<id>). This format
# is an improvement over the /course/... format for studio authored courses,
# because it is agnostic to course-hierarchy.
# NOTE: module_id is empty string here. The 'module_id' will get assigned in the replacement
# function, we just need to specify something to get the reverse() to work.
block_wrappers.append(partial(
replace_jump_to_id_urls,
course_id,
reverse('jump_to_id', kwargs={'course_id': course_id.to_deprecated_string(), 'module_id': ''}),
))
if settings.FEATURES.get('DISPLAY_DEBUG_INFO_TO_STAFF'):
if is_masquerading_as_specific_student(user, course_id):
# When masquerading as a specific student, we want to show the debug button
# unconditionally to enable resetting the state of the student we are masquerading as.
# We already know the user has staff access when masquerading is active.
staff_access = True
# To figure out whether the user has instructor access, we temporarily remove the
# masquerade_settings from the real_user. With the masquerading settings in place,
# the result would always be "False".
masquerade_settings = user.real_user.masquerade_settings
del user.real_user.masquerade_settings
instructor_access = bool(has_access(user.real_user, 'instructor', descriptor, course_id))
user.real_user.masquerade_settings = masquerade_settings
else:
staff_access = has_access(user, 'staff', descriptor, course_id)
instructor_access = bool(has_access(user, 'instructor', descriptor, course_id))
if staff_access:
block_wrappers.append(partial(add_staff_markup, user, instructor_access, disable_staff_debug_info))
# These modules store data using the anonymous_student_id as a key.
# To prevent loss of data, we will continue to provide old modules with
# the per-student anonymized id (as we have in the past),
# while giving selected modules a per-course anonymized id.
# As we have the time to manually test more modules, we can add to the list
# of modules that get the per-course anonymized id.
is_pure_xblock = isinstance(descriptor, XBlock) and not isinstance(descriptor, XModuleDescriptor)
module_class = getattr(descriptor, 'module_class', None)
is_lti_module = not is_pure_xblock and issubclass(module_class, LTIModule)
if is_pure_xblock or is_lti_module:
anonymous_student_id = anonymous_id_for_user(user, course_id)
else:
anonymous_student_id = anonymous_id_for_user(user, None)
field_data = LmsFieldData(descriptor._field_data, student_data) # pylint: disable=protected-access
user_is_staff = bool(has_access(user, u'staff', descriptor.location, course_id))
system = LmsModuleSystem(
track_function=track_function,
render_template=render_to_string,
static_url=settings.STATIC_URL,
xqueue=xqueue,
# TODO (cpennington): Figure out how to share info between systems
filestore=descriptor.runtime.resources_fs,
get_module=inner_get_module,
user=user,
debug=settings.DEBUG,
hostname=settings.SITE_NAME,
# TODO (cpennington): This should be removed when all html from
# a module is coming through get_html and is therefore covered
# by the replace_static_urls code below
replace_urls=partial(
static_replace.replace_static_urls,
data_directory=getattr(descriptor, 'data_dir', None),
course_id=course_id,
static_asset_path=static_asset_path or descriptor.static_asset_path,
),
replace_course_urls=partial(
static_replace.replace_course_urls,
course_key=course_id
),
replace_jump_to_id_urls=partial(
static_replace.replace_jump_to_id_urls,
course_id=course_id,
jump_to_id_base_url=reverse('jump_to_id', kwargs={'course_id': course_id.to_deprecated_string(), 'module_id': ''})
),
node_path=settings.NODE_PATH,
publish=publish,
anonymous_student_id=anonymous_student_id,
course_id=course_id,
cache=cache,
can_execute_unsafe_code=(lambda: can_execute_unsafe_code(course_id)),
get_python_lib_zip=(lambda: get_python_lib_zip(contentstore, course_id)),
# TODO: When we merge the descriptor and module systems, we can stop reaching into the mixologist (cpennington)
mixins=descriptor.runtime.mixologist._mixins, # pylint: disable=protected-access
wrappers=block_wrappers,
get_real_user=user_by_anonymous_id,
services={
'fs': FSService(),
'field-data': field_data,
'user': DjangoXBlockUserService(user, user_is_staff=user_is_staff),
'verification': VerificationService(),
'proctoring': ProctoringService(),
'milestones': milestones_helpers.get_service(),
'credit': CreditService(),
'bookmarks': BookmarksService(user=user),
},
get_user_role=lambda: get_user_role(user, course_id),
descriptor_runtime=descriptor._runtime, # pylint: disable=protected-access
rebind_noauth_module_to_user=rebind_noauth_module_to_user,
user_location=user_location,
request_token=request_token,
)
# pass position specified in URL to module through ModuleSystem
if position is not None:
try:
position = int(position)
except (ValueError, TypeError):
log.exception('Non-integer %r passed as position.', position)
position = None
system.set('position', position)
system.set(u'user_is_staff', user_is_staff)
system.set(u'user_is_admin', bool(has_access(user, u'staff', 'global')))
system.set(u'user_is_beta_tester', CourseBetaTesterRole(course_id).has_user(user))
system.set(u'days_early_for_beta', descriptor.days_early_for_beta)
# make an ErrorDescriptor -- assuming that the descriptor's system is ok
if has_access(user, u'staff', descriptor.location, course_id):
system.error_descriptor_class = ErrorDescriptor
else:
system.error_descriptor_class = NonStaffErrorDescriptor
return system, field_data