def can_load():
"""
NOTE: This does not check that the student is enrolled in the course
that contains this module. We may or may not want to allow non-enrolled
students to see modules. If not, views should check the course, so we
don't have to hit the enrollments table on every module load.
"""
# If the user (or the role the user is currently masquerading as) does not have
# access to this content, then deny access. The problem with calling _has_staff_access_to_descriptor
# before this method is that _has_staff_access_to_descriptor short-circuits and returns True
# for staff users in preview mode.
group_access_response = _has_group_access(descriptor, user, course_key)
if not group_access_response:
return group_access_response
# If the user has staff access, they can load the module and checks below are not needed.
staff_access_response = _has_staff_access_to_descriptor(user, descriptor, course_key)
if staff_access_response:
return staff_access_response
return (
_visible_to_nonstaff_users(descriptor, display_error_to_user=False) and
(
_has_detached_class_tag(descriptor) or
check_start_date(
user,
descriptor.days_early_for_beta,
descriptor.start,
course_key,
display_error_to_user=False
)
)
)
def transform_block_filters(self, usage_info, block_structure):
# Users with staff access bypass the Start Date check.
if usage_info.has_staff_access:
return [block_structure.create_universal_filter()]
removal_condition = lambda block_key: not check_start_date(
usage_info.user,
block_structure.get_xblock_field(block_key, 'days_early_for_beta'),
self._get_merged_start_date(block_structure, block_key),
usage_info.course_key,
)
return [block_structure.create_removal_filter(removal_condition)]
def transform_block_filters(self, usage_info, block_structure):
# Users with staff access bypass the Start Date check.
if usage_info.has_staff_access:
return [block_structure.create_universal_filter()]
removal_condition = lambda block_key: not check_start_date(
usage_info.user,
block_structure.get_xblock_field(block_key, 'days_early_for_beta'),
self._get_merged_start_date(block_structure, block_key),
usage_info.course_key,
)
return [block_structure.create_removal_filter(removal_condition)]
def transform(self, usage_info, block_structure):
"""
Mutates block_structure based on the given usage_info.
"""
# Users with staff access bypass the Start Date check.
if usage_info.has_staff_access:
return
block_structure.remove_block_if(lambda block_key: not check_start_date(
usage_info.user,
block_structure.get_xblock_field(block_key, 'days_early_for_beta'),
self.get_merged_start_date(block_structure, block_key),
usage_info.course_key,
))
def transform(self, usage_info, block_structure):
"""
Mutates block_structure based on the given usage_info.
"""
# Users with staff access bypass the Start Date check.
if usage_info.has_staff_access:
return
block_structure.remove_block_if(
lambda block_key: not check_start_date(
usage_info.user,
block_structure.get_xblock_field(block_key, 'days_early_for_beta'),
self.get_merged_start_date(block_structure, block_key),
usage_info.course_key,
)
)
def transform_block_filters(self, usage_info, block_structure):
# Users with staff access bypass the Start Date check.
if usage_info.has_staff_access or usage_info.allow_start_dates_in_future:
return [block_structure.create_universal_filter()]
now = datetime.now(UTC)
removal_condition = lambda block_key: not check_start_date(
usage_info.user,
block_structure.get_xblock_field(block_key, 'days_early_for_beta'),
self._get_merged_start_date(block_structure, block_key),
usage_info.course_key,
now=now,
)
if usage_info.include_has_scheduled_content:
self._check_has_scheduled_content(block_structure, removal_condition)
return [block_structure.create_removal_filter(removal_condition)]
