4fe5f3457d
Display gated sections in course outline, navigation and in the course when user has met prerequiste condition. WL-1273, WL-1317
80 lines
3.3 KiB
Python
80 lines
3.3 KiB
Python
"""
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API for the gating djangoapp
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"""
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import json
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import logging
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from collections import defaultdict
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from opaque_keys.edx.keys import UsageKey
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from lms.djangoapps.courseware.entrance_exams import get_entrance_exam_content
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from openedx.core.lib.gating import api as gating_api
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from util import milestones_helpers
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log = logging.getLogger(__name__)
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@gating_api.gating_enabled(default=False)
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def evaluate_prerequisite(course, subsection_grade, user):
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"""
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Evaluates any gating milestone relationships attached to the given
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subsection. If the subsection_grade meets the minimum score required
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by dependent subsections, the related milestone will be marked
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fulfilled for the user.
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"""
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prereq_milestone = gating_api.get_gating_milestone(course.id, subsection_grade.location, 'fulfills')
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if prereq_milestone:
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gated_content_milestones = defaultdict(list)
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for milestone in gating_api.find_gating_milestones(course.id, content_key=None, relationship='requires'):
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gated_content_milestones[milestone['id']].append(milestone)
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gated_content = gated_content_milestones.get(prereq_milestone['id'])
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if gated_content:
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for milestone in gated_content:
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gating_api.update_milestone(milestone, subsection_grade, prereq_milestone, user.id)
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def evaluate_entrance_exam(course_grade, user):
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"""
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Evaluates any entrance exam milestone relationships attached
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to the given course. If the course_grade meets the
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minimum score required, the dependent milestones will be marked
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fulfilled for the user.
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"""
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course = course_grade.course_data.course
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if milestones_helpers.is_entrance_exams_enabled() and getattr(course, 'entrance_exam_enabled', False):
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if get_entrance_exam_content(user, course):
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exam_chapter_key = get_entrance_exam_usage_key(course)
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exam_score_ratio = get_entrance_exam_score_ratio(course_grade, exam_chapter_key)
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if exam_score_ratio >= course.entrance_exam_minimum_score_pct:
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relationship_types = milestones_helpers.get_milestone_relationship_types()
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content_milestones = milestones_helpers.get_course_content_milestones(
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course.id,
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exam_chapter_key,
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relationship=relationship_types['FULFILLS']
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)
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# Mark each entrance exam dependent milestone as fulfilled by the user.
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for milestone in content_milestones:
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milestones_helpers.add_user_milestone({'id': user.id}, milestone)
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def get_entrance_exam_usage_key(course):
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"""
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Returns the UsageKey of the entrance exam for the course.
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"""
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return UsageKey.from_string(course.entrance_exam_id).replace(course_key=course.id)
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def get_entrance_exam_score_ratio(course_grade, exam_chapter_key):
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"""
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Returns the score for the given chapter as a ratio of the
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aggregated earned over the possible points, resulting in a
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decimal value less than 1.
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"""
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try:
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entrance_exam_score_ratio = course_grade.chapter_percentage(exam_chapter_key)
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except KeyError:
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entrance_exam_score_ratio = 0.0, 0.0
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log.warning(u'Gating: Unexpectedly failed to find chapter_grade for %s.', exam_chapter_key)
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return entrance_exam_score_ratio
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