def load_preview_module(request, preview_id, descriptor):
"""
Return a preview XModule instantiated from the supplied descriptor.
request: The active django request
preview_id (str): An identifier specifying which preview this module is used for
descriptor: An XModuleDescriptor
"""
student_data = DbModel(SessionKeyValueStore(request))
descriptor.bind_for_student(
preview_module_system(request, preview_id, descriptor),
lms_field_data(descriptor._field_data, student_data), # pylint: disable=protected-access
)
return descriptor
def setUp(self):
self.course = CourseFactory.create(data=self.COURSE_DATA)
# Turn off cache.
modulestore().request_cache = None
modulestore().metadata_inheritance_cache_subsystem = None
chapter = ItemFactory.create(parent_location=self.course.location, category="sequential")
section = ItemFactory.create(parent_location=chapter.location, category="sequential")
# username = robot{0}, password = '******'
self.users = [UserFactory.create() for i in range(self.USER_COUNT)]
for user in self.users:
CourseEnrollmentFactory.create(user=user, course_id=self.course.id)
self.item_descriptor = ItemFactory.create(
parent_location=section.location, category=self.CATEGORY, data=self.DATA
)
self.runtime = self.new_descriptor_runtime()
field_data = {}
field_data.update(self.MODEL_DATA)
student_data = DictFieldData(field_data)
self.item_descriptor._field_data = lms_field_data(self.item_descriptor._field_data, student_data)
self.item_descriptor.xmodule_runtime = self.new_module_runtime()
self.item_module = self.item_descriptor
self.item_url = Location(self.item_module.location).url()
# login all users for acces to Xmodule
self.clients = {user.username: Client() for user in self.users}
self.login_statuses = [
self.clients[user.username].login(username=user.username, password="******") for user in self.users
]
self.assertTrue(all(self.login_statuses))
def xblock_field_data(descriptor):
student_data = DbModel(DjangoKeyValueStore(field_data_cache))
return lms_field_data(descriptor._field_data, student_data)
def xblock_field_data(descriptor):
student_data = DbModel(DjangoKeyValueStore(field_data_cache))
return lms_field_data(descriptor._field_data, student_data)
def preview_field_data(descriptor):
"Helper method to create a DbModel from a descriptor"
student_data = DbModel(SessionKeyValueStore(request))
return lms_field_data(descriptor._field_data, student_data)
def preview_field_data(descriptor):
"Helper method to create a DbModel from a descriptor"
student_data = DbModel(SessionKeyValueStore(request))
return lms_field_data(descriptor._field_data, student_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.
"""
# 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 = DbModel(DjangoKeyValueStore(field_data_cache))
descriptor._field_data = lms_field_data(descriptor._field_data, student_data)
# Setup system context for module instance
ajax_url = reverse(
'modx_dispatch',
kwargs=dict(
course_id=course_id,
location=descriptor.location.url(),
dispatch=''
),
)
# Intended use is as {ajax_url}/{dispatch_command}, so get rid of the trailing slash.
ajax_url = ajax_url.rstrip('/')
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(event):
"""A function that allows XModules to publish events. This only supports grade changes right now."""
if event.get('event_name') != 'grade':
return
# 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 = [
"org:{0}".format(org),
"course:{0}".format(course_num),
"run:{0}".format(run),
"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(wrap_xblock)
# 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.MITX_FEATURES.get('DISPLAY_HISTOGRAMS_TO_STAFF'):
if has_access(user, descriptor, 'staff', course_id):
block_wrappers.append(partial(add_histogram, user))
system = ModuleSystem(
track_function=track_function,
render_template=render_to_string,
static_url=settings.STATIC_URL,
ajax_url=ajax_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=unique_id_for_user(user),
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,
)
# pass position specified in URL to module through ModuleSystem
system.set('position', position)
if settings.MITX_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('user_is_staff', has_access(user, descriptor.location, '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 xmodule_field_data(self, descriptor):
field_data = {}
field_data.update(self.MODEL_DATA)
student_data = DictFieldData(field_data)
return lms_field_data(descriptor._field_data, student_data)
def xmodule_field_data(self, descriptor):
field_data = {}
field_data.update(self.MODEL_DATA)
student_data = DictFieldData(field_data)
return lms_field_data(descriptor._field_data, student_data)