def transform(self, usage_info, block_structure):
"""
Mutates block_structure based on the given usage_info.
"""
all_library_children = set()
all_selected_children = set()
for block_key in block_structure.topological_traversal(
filter_func=lambda block_key: block_key.block_type == 'library_content',
yield_descendants_of_unyielded=True,
):
library_children = block_structure.get_children(block_key)
if library_children:
all_library_children.update(library_children)
selected = []
mode = block_structure.get_xblock_field(block_key, 'mode')
max_count = block_structure.get_xblock_field(block_key, 'max_count')
# Retrieve "selected" json from LMS MySQL database.
module = self._get_student_module(usage_info.user, usage_info.course_key, block_key)
if module:
state_dict = json.loads(module.state)
# Add all selected entries for this user for this
# library module to the selected list.
for state in state_dict['selected']:
usage_key = usage_info.course_key.make_usage_key(state[0], state[1])
if usage_key in library_children:
selected.append((state[0], state[1]))
# update selected
previous_count = len(selected)
block_keys = LibraryContentModule.make_selection(selected, library_children, max_count, mode)
selected = block_keys['selected']
# publish events for analytics
self._publish_events(block_structure, block_key, previous_count, max_count, block_keys)
all_selected_children.update(usage_info.course_key.make_usage_key(s[0], s[1]) for s in selected)
def check_child_removal(block_key):
"""
Return True if selected block should be removed.
Block is removed if it is part of library_content, but has
not been selected for current user.
"""
if block_key not in all_library_children:
return False
if block_key in all_selected_children:
return False
return True
# Check and remove all non-selected children from course
# structure.
block_structure.remove_block_if(
check_child_removal
)
def transform_block_filters(self, usage_info, block_structure):
all_library_children = set()
all_selected_children = set()
for block_key in block_structure:
if block_key.block_type != 'library_content':
continue
library_children = block_structure.get_children(block_key)
if library_children:
all_library_children.update(library_children)
selected = []
mode = block_structure.get_xblock_field(block_key, 'mode')
max_count = block_structure.get_xblock_field(
block_key, 'max_count')
# Retrieve "selected" json from LMS MySQL database.
module = self._get_student_module(usage_info.user,
usage_info.course_key,
block_key)
if module:
state_dict = json.loads(module.state)
# Add all selected entries for this user for this
# library module to the selected list.
for state in state_dict['selected']:
usage_key = usage_info.course_key.make_usage_key(
state[0], state[1])
if usage_key in library_children:
selected.append((state[0], state[1]))
# update selected
previous_count = len(selected)
block_keys = LibraryContentModule.make_selection(
selected, library_children, max_count, mode)
selected = block_keys['selected']
# publish events for analytics
self._publish_events(block_structure, block_key,
previous_count, max_count, block_keys)
all_selected_children.update(
usage_info.course_key.make_usage_key(s[0], s[1])
for s in selected)
def check_child_removal(block_key):
"""
Return True if selected block should be removed.
Block is removed if it is part of library_content, but has
not been selected for current user.
"""
if block_key not in all_library_children:
return False
if block_key in all_selected_children:
return False
return True
return [block_structure.create_removal_filter(check_child_removal)]
def transform_block_filters(self, usage_info, block_structure):
all_library_children = set()
all_selected_children = set()
for block_key in block_structure:
if block_key.block_type != 'library_content':
continue
library_children = block_structure.get_children(block_key)
if library_children:
all_library_children.update(library_children)
selected = []
mode = block_structure.get_xblock_field(block_key, 'mode')
max_count = block_structure.get_xblock_field(block_key, 'max_count')
# Retrieve "selected" json from LMS MySQL database.
module = self._get_student_module(usage_info.user, usage_info.course_key, block_key)
if module:
state_dict = json.loads(module.state)
# Add all selected entries for this user for this
# library module to the selected list.
for state in state_dict['selected']:
usage_key = usage_info.course_key.make_usage_key(state[0], state[1])
if usage_key in library_children:
selected.append((state[0], state[1]))
# update selected
previous_count = len(selected)
block_keys = LibraryContentModule.make_selection(selected, library_children, max_count, mode)
selected = block_keys['selected']
# publish events for analytics
self._publish_events(block_structure, block_key, previous_count, max_count, block_keys)
all_selected_children.update(usage_info.course_key.make_usage_key(s[0], s[1]) for s in selected)
def check_child_removal(block_key):
"""
Return True if selected block should be removed.
Block is removed if it is part of library_content, but has
not been selected for current user.
"""
if block_key not in all_library_children:
return False
if block_key in all_selected_children:
return False
return True
return [block_structure.create_removal_filter(check_child_removal)]
def transform_block_filters(self, usage_info, block_structure):
all_library_children = set()
all_selected_children = set()
for block_key in block_structure:
if block_key.block_type != 'library_content':
continue
library_children = block_structure.get_children(block_key)
if library_children:
all_library_children.update(library_children)
selected = []
mode = block_structure.get_xblock_field(block_key, 'mode')
max_count = block_structure.get_xblock_field(
block_key, 'max_count')
# Retrieve "selected" json from LMS MySQL database.
state_dict = get_student_module_as_dict(
usage_info.user, usage_info.course_key, block_key)
for selected_block in state_dict.get('selected', []):
# Add all selected entries for this user for this
# library module to the selected list.
block_type, block_id = selected_block
usage_key = usage_info.course_key.make_usage_key(
block_type, block_id)
if usage_key in library_children:
selected.append(selected_block)
# Update selected
previous_count = len(selected)
block_keys = LibraryContentModule.make_selection(
selected, library_children, max_count, mode)
selected = block_keys['selected']
# Save back any changes
if any(block_keys[changed]
for changed in ('invalid', 'overlimit', 'added')):
state_dict['selected'] = list(selected)
StudentModule.save_state(
student=usage_info.user,
course_id=usage_info.course_key,
module_state_key=block_key,
defaults={
'state': json.dumps(state_dict),
},
)
# publish events for analytics
self._publish_events(
block_structure,
block_key,
previous_count,
max_count,
block_keys,
usage_info.user.id,
)
all_selected_children.update(
usage_info.course_key.make_usage_key(s[0], s[1])
for s in selected)
def check_child_removal(block_key):
"""
Return True if selected block should be removed.
Block is removed if it is part of library_content, but has
not been selected for current user, with staff as an exemption.
"""
if usage_info.has_staff_access:
return False
if block_key not in all_library_children:
return False
if block_key in all_selected_children:
return False
return True
return [block_structure.create_removal_filter(check_child_removal)]
def transform_block_filters(self, usage_info, block_structure):
all_library_children = set()
all_selected_children = set()
for block_key in block_structure:
if block_key.block_type != 'library_content':
continue
library_children = block_structure.get_children(block_key)
if library_children:
all_library_children.update(library_children)
selected = []
mode = block_structure.get_xblock_field(block_key, 'mode')
max_count = block_structure.get_xblock_field(block_key, 'max_count')
# Retrieve "selected" json from LMS MySQL database.
module = self._get_student_module(usage_info.user, usage_info.course_key, block_key)
if module:
state_dict = json.loads(module.state)
else:
state_dict = {}
for selected_block in state_dict.get('selected', []):
# Add all selected entries for this user for this
# library module to the selected list.
block_type, block_id = selected_block
usage_key = usage_info.course_key.make_usage_key(block_type, block_id)
if usage_key in library_children:
selected.append(selected_block)
# Update selected
previous_count = len(selected)
block_keys = LibraryContentModule.make_selection(selected, library_children, max_count, mode)
selected = block_keys['selected']
# Save back any changes
if any(block_keys[changed] for changed in ('invalid', 'overlimit', 'added')):
state_dict['selected'] = list(selected)
StudentModule.objects.update_or_create( # pylint: disable=no-member
student=usage_info.user,
course_id=usage_info.course_key,
module_state_key=block_key,
defaults={
'state': json.dumps(state_dict),
},
)
# publish events for analytics
self._publish_events(block_structure, block_key, previous_count, max_count, block_keys)
all_selected_children.update(usage_info.course_key.make_usage_key(s[0], s[1]) for s in selected)
def check_child_removal(block_key):
"""
Return True if selected block should be removed.
Block is removed if it is part of library_content, but has
not been selected for current user.
"""
if block_key not in all_library_children:
return False
if block_key in all_selected_children:
return False
return True
return [block_structure.create_removal_filter(check_child_removal)]
