65 lines
2.5 KiB
Python
65 lines
2.5 KiB
Python
"""
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This file contains celery tasks related to course content gating.
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"""
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import logging
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from celery import task
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from django.contrib.auth.models import User
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from gating import api as gating_api
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from lms.djangoapps.course_blocks.api import get_course_blocks
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from opaque_keys.edx.keys import CourseKey, UsageKey
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from xmodule.modulestore.django import modulestore
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log = logging.getLogger(__name__)
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@task()
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def task_evaluate_subsection_completion_milestones(course_id, block_id, user_id):
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"""
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Updates users' milestones related to completion of a subsection.
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Args:
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course_id(str): Course id which triggered a completion event
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block_id(str): Id of the completed block
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user_id(int): Id of the user who completed a block
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"""
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store = modulestore()
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course_key = CourseKey.from_string(course_id)
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with store.bulk_operations(course_key):
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course = store.get_course(course_key)
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if not course or not course.enable_subsection_gating:
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log.debug(
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u"Gating: ignoring evaluation of completion milestone because it disabled for course [%s]", course_id
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)
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else:
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try:
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user = User.objects.get(id=user_id)
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course_structure = get_course_blocks(user, store.make_course_usage_key(course_key))
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completed_block_usage_key = UsageKey.from_string(block_id).map_into_course(course.id)
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subsection_block = _get_subsection_of_block(completed_block_usage_key, course_structure)
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subsection = course_structure[subsection_block]
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log.debug(
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u"Gating: Evaluating completion milestone for subsection [%s] and user [%s]",
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unicode(subsection.location), user.id
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)
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gating_api.evaluate_prerequisite(course, subsection, user)
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except KeyError:
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log.error(u"Gating: Given prerequisite subsection [%s] not found in course structure", block_id)
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def _get_subsection_of_block(usage_key, block_structure):
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"""
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Finds subsection of a block by recursively iterating over its parents
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:param usage_key: key of the block
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:param block_structure: block structure
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:return: sequential block
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"""
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parents = block_structure.get_parents(usage_key)
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if parents:
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for parent_block in parents:
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if parent_block.block_type == 'sequential':
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return parent_block
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else:
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return _get_subsection_of_block(parent_block, block_structure)
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