390 lines
16 KiB
Python
390 lines
16 KiB
Python
"""
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Utilities to facilitate experimentation
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"""
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from __future__ import absolute_import
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import logging
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from decimal import Decimal
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import six
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from django.utils.timezone import now
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from opaque_keys import InvalidKeyError
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from opaque_keys.edx.keys import CourseKey
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from course_modes.models import format_course_price, get_cosmetic_verified_display_price, CourseMode
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from courseware.access import has_staff_access_to_preview_mode
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from courseware.date_summary import verified_upgrade_deadline_link, verified_upgrade_link_is_valid
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from entitlements.models import CourseEntitlement
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from lms.djangoapps.commerce.utils import EcommerceService
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from openedx.core.djangoapps.catalog.utils import get_programs
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from openedx.core.djangoapps.django_comment_common.models import Role
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from openedx.core.djangoapps.waffle_utils import WaffleFlag, WaffleFlagNamespace
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from openedx.features.course_duration_limits.access import get_user_course_expiration_date
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from openedx.features.course_duration_limits.models import CourseDurationLimitConfig
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from student.models import CourseEnrollment
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from xmodule.partitions.partitions_service import get_all_partitions_for_course, get_user_partition_groups
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# Import this for backwards compatibility (so that anyone importing this function from here doesn't break)
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from .stable_bucketing import stable_bucketing_hash_group # pylint: disable=unused-import
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logger = logging.getLogger(__name__)
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# TODO: clean up as part of REVEM-199 (START)
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experiments_namespace = WaffleFlagNamespace(name=u'experiments')
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# .. toggle_name: experiments.add_programs
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# .. toggle_type: feature_flag
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# .. toggle_default: False
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# .. toggle_description: Toggle for adding the current course's program information to user metadata
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# .. toggle_category: experiments
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# .. toggle_expiration_date: None
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# .. toggle_warnings: None
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# .. toggle_tickets: REVEM-63, REVEM-198
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# .. toggle_status: supported
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PROGRAM_INFO_FLAG = WaffleFlag(
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waffle_namespace=experiments_namespace,
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flag_name=u'add_programs',
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flag_undefined_default=False
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)
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# .. toggle_name: experiments.add_dashboard_info
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# .. toggle_type: feature_flag
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# .. toggle_default: False
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# .. toggle_description: Toggle for adding info about each course to the dashboard metadata
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# .. toggle_category: experiments
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# .. toggle_expiration_date: None
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# .. toggle_warnings: None
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# .. toggle_tickets: REVEM-118
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# .. toggle_status: supported
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DASHBOARD_INFO_FLAG = WaffleFlag(experiments_namespace,
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u'add_dashboard_info',
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flag_undefined_default=False)
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# TODO END: clean up as part of REVEM-199 (End)
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def check_and_get_upgrade_link_and_date(user, enrollment=None, course=None):
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"""
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For an authenticated user, return a link to allow them to upgrade
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in the specified course.
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Returns the upgrade link and upgrade deadline for a user in a given course given
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that the user is within the window to upgrade defined by our dynamic pacing feature;
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otherwise, returns None for both the link and date.
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"""
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if enrollment is None and course is None:
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logger.warn(u'Must specify either an enrollment or a course')
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return (None, None)
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if enrollment:
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if course is None:
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course = enrollment.course
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elif enrollment.course_id != course.id:
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logger.warn(u'{} refers to a different course than {} which was supplied. Enrollment course id={}, '
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u'repr={!r}, deprecated={}. Course id={}, repr={!r}, deprecated={}.'
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.format(enrollment,
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course,
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enrollment.course_id,
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enrollment.course_id,
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enrollment.course_id.deprecated,
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course.id,
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course.id,
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course.id.deprecated
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)
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)
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return (None, None)
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if enrollment.user_id != user.id:
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logger.warn(u'{} refers to a different user than {} which was supplied. Enrollment user id={}, repr={!r}. '
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u'User id={}, repr={!r}.'.format(enrollment,
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user,
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enrollment.user_id,
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enrollment.user_id,
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user.id,
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user.id,
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)
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)
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return (None, None)
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if enrollment is None:
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enrollment = CourseEnrollment.get_enrollment(user, course.id)
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if user.is_authenticated and verified_upgrade_link_is_valid(enrollment):
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return (
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verified_upgrade_deadline_link(user, course),
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enrollment.upgrade_deadline
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)
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return (None, None)
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# TODO: clean up as part of REVEM-199 (START)
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def get_program_price_and_skus(courses):
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"""
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Get the total program price and purchase skus from these courses in the program
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"""
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program_price = 0
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skus = []
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for course in courses:
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course_price, course_sku = get_course_entitlement_price_and_sku(course)
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if course_price is not None and course_sku is not None:
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program_price = Decimal(program_price) + Decimal(course_price)
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skus.append(course_sku)
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if program_price <= 0:
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program_price = None
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skus = None
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else:
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program_price = format_course_price(program_price)
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program_price = six.text_type(program_price)
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return program_price, skus
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def get_course_entitlement_price_and_sku(course):
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"""
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Get the entitlement price and sku from this course.
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Try to get them from the first non-expired, verified entitlement that has a price and a sku. If that doesn't work,
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fall back to the first non-expired, verified course run that has a price and a sku.
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"""
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for entitlement in course.get('entitlements', []):
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if entitlement.get('mode') == 'verified' and entitlement['price'] and entitlement['sku']:
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expires = entitlement.get('expires')
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if not expires or expires > now():
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return entitlement['price'], entitlement['sku']
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course_runs = course.get('course_runs', [])
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published_course_runs = [run for run in course_runs if run['status'] == 'published']
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for published_course_run in published_course_runs:
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for seat in published_course_run['seats']:
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if seat.get('type') == 'verified' and seat['price'] and seat['sku']:
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price = Decimal(seat.get('price'))
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return price, seat.get('sku')
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return None, None
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def get_unenrolled_courses(courses, user_enrollments):
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"""
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Given a list of courses and a list of user enrollments, return the courses in which the user is not enrolled.
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Depending on the enrollments that are passed in, this method can be used to determine the courses in a program in
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which the user has not yet enrolled or the courses in a program for which the user has not yet purchased a
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certificate.
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"""
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# Get the enrollment course ids here, so we don't need to loop through them for every course run
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enrollment_course_ids = {enrollment.course_id for enrollment in user_enrollments}
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unenrolled_courses = []
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for course in courses:
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if not is_enrolled_in_course(course, enrollment_course_ids):
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unenrolled_courses.append(course)
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return unenrolled_courses
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def is_enrolled_in_all_courses(courses, user_enrollments):
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"""
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Determine if the user is enrolled in all of the courses
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"""
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# Get the enrollment course ids here, so we don't need to loop through them for every course run
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enrollment_course_ids = {enrollment.course_id for enrollment in user_enrollments}
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for course in courses:
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if not is_enrolled_in_course(course, enrollment_course_ids):
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# User is not enrolled in this course, meaning they are not enrolled in all courses in the program
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return False
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# User is enrolled in all courses in the program
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return True
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def is_enrolled_in_course(course, enrollment_course_ids):
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"""
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Determine if the user is enrolled in this course
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"""
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course_runs = course.get('course_runs')
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if course_runs:
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for course_run in course_runs:
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if is_enrolled_in_course_run(course_run, enrollment_course_ids):
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return True
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return False
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def is_enrolled_in_course_run(course_run, enrollment_course_ids):
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"""
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Determine if the user is enrolled in this course run
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"""
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key = None
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try:
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key = course_run.get('key')
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course_run_key = CourseKey.from_string(key)
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return course_run_key in enrollment_course_ids
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except InvalidKeyError:
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logger.warn(
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u'Unable to determine if user was enrolled since the course key {} is invalid'.format(key)
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)
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return False # Invalid course run key. Assume user is not enrolled.
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def get_dashboard_course_info(user, dashboard_enrollments):
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"""
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Given a list of enrollments shown on the dashboard, return a dict of course ids and experiment info for that course
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"""
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course_info = None
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if DASHBOARD_INFO_FLAG.is_enabled():
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# Get the enrollments here since the dashboard filters out those with completed entitlements
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user_enrollments = CourseEnrollment.objects.select_related('course').filter(user_id=user.id)
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course_info = {
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str(dashboard_enrollment.course): get_base_experiment_metadata_context(dashboard_enrollment.course,
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user,
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dashboard_enrollment,
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user_enrollments)
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for dashboard_enrollment in dashboard_enrollments
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}
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return course_info
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# TODO: clean up as part of REVEM-199 (END)
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def get_experiment_user_metadata_context(course, user):
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"""
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Return a context dictionary with the keys used by the user_metadata.html.
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"""
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enrollment = None
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# TODO: clean up as part of REVO-28 (START)
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user_enrollments = None
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audit_enrollments = None
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has_non_audit_enrollments = False
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try:
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user_enrollments = CourseEnrollment.objects.select_related('course').filter(user_id=user.id)
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has_non_audit_enrollments = user_enrollments.exclude(mode__in=CourseMode.UPSELL_TO_VERIFIED_MODES).exists()
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# TODO: clean up as part of REVO-28 (END)
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enrollment = CourseEnrollment.objects.select_related(
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'course'
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).get(user_id=user.id, course_id=course.id)
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except CourseEnrollment.DoesNotExist:
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pass # Not enrolled, use the default values
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has_entitlements = False
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if user.is_authenticated():
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has_entitlements = CourseEntitlement.objects.filter(user=user).exists()
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context = get_base_experiment_metadata_context(course, user, enrollment, user_enrollments)
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has_staff_access = has_staff_access_to_preview_mode(user, course.id)
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forum_roles = []
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if user.is_authenticated:
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forum_roles = list(Role.objects.filter(users=user, course_id=course.id).values_list('name').distinct())
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# get user partition data
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if user.is_authenticated():
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partition_groups = get_all_partitions_for_course(course)
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user_partitions = get_user_partition_groups(course.id, partition_groups, user, 'name')
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else:
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user_partitions = {}
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# TODO: clean up as part of REVO-28 (START)
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context['has_non_audit_enrollments'] = has_non_audit_enrollments or has_entitlements
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# TODO: clean up as part of REVO-28 (END)
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context['has_staff_access'] = has_staff_access
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context['forum_roles'] = forum_roles
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context['partition_groups'] = user_partitions
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return context
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def get_base_experiment_metadata_context(course, user, enrollment, user_enrollments):
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"""
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Return a context dictionary with the keys used by dashboard_metadata.html and user_metadata.html
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"""
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enrollment_mode = None
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enrollment_time = None
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# TODO: clean up as part of REVEM-199 (START)
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program_key = get_program_context(course, user_enrollments)
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# TODO: clean up as part of REVEM-199 (END)
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if enrollment and enrollment.is_active:
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enrollment_mode = enrollment.mode
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enrollment_time = enrollment.created
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# upgrade_link and upgrade_date should be None if user has passed their dynamic pacing deadline.
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upgrade_link, upgrade_date = check_and_get_upgrade_link_and_date(user, enrollment, course)
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return {
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'upgrade_link': upgrade_link,
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'upgrade_price': six.text_type(get_cosmetic_verified_display_price(course)),
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'enrollment_mode': enrollment_mode,
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'enrollment_time': enrollment_time,
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'pacing_type': 'self_paced' if course.self_paced else 'instructor_paced',
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'upgrade_deadline': upgrade_date,
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'audit_access_deadline': get_audit_access_expiration(user, course),
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'course_key': course.id,
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'course_start': course.start,
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'course_end': course.end,
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# TODO: clean up as part of REVEM-199 (START)
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'program_key_fields': program_key,
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# TODO: clean up as part of REVEM-199 (END)
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}
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def get_audit_access_expiration(user, course):
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"""
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Return the expiration date for the user's audit access to this course.
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"""
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if not CourseDurationLimitConfig.enabled_for_enrollment(user=user, course_key=course.id):
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return None
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return get_user_course_expiration_date(user, course)
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# TODO: clean up as part of REVEM-199 (START)
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def get_program_context(course, user_enrollments):
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"""
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Return a context dictionary with program information.
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"""
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program_key = None
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non_audit_enrollments = user_enrollments.exclude(mode__in=CourseMode.UPSELL_TO_VERIFIED_MODES)
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if PROGRAM_INFO_FLAG.is_enabled():
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programs = get_programs(course=course.id)
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if programs:
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# A course can be in multiple programs, but we're just grabbing the first one
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program = programs[0]
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complete_enrollment = False
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has_courses_left_to_purchase = False
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total_courses = None
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courses = program.get('courses')
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courses_left_to_purchase_price = None
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courses_left_to_purchase_url = None
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program_uuid = program.get('uuid')
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is_eligible_for_one_click_purchase = program.get('is_program_eligible_for_one_click_purchase')
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if courses is not None:
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total_courses = len(courses)
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complete_enrollment = is_enrolled_in_all_courses(courses, user_enrollments)
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# Get the price and purchase URL of the program courses the user has yet to purchase. Say a
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# program has 3 courses (A, B and C), and the user previously purchased a certificate for A.
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# The user is enrolled in audit mode for B. The "left to purchase price" should be the price of
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# B+C.
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courses_left_to_purchase = get_unenrolled_courses(courses, non_audit_enrollments)
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if courses_left_to_purchase:
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has_courses_left_to_purchase = True
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if courses_left_to_purchase and is_eligible_for_one_click_purchase:
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courses_left_to_purchase_price, courses_left_to_purchase_skus = \
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get_program_price_and_skus(courses_left_to_purchase)
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if courses_left_to_purchase_skus:
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courses_left_to_purchase_url = EcommerceService().get_checkout_page_url(
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*courses_left_to_purchase_skus, program_uuid=program_uuid)
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program_key = {
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'uuid': program_uuid,
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'title': program.get('title'),
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'marketing_url': program.get('marketing_url'),
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'status': program.get('status'),
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'is_eligible_for_one_click_purchase': is_eligible_for_one_click_purchase,
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'total_courses': total_courses,
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'complete_enrollment': complete_enrollment,
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'has_courses_left_to_purchase': has_courses_left_to_purchase,
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'courses_left_to_purchase_price': courses_left_to_purchase_price,
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'courses_left_to_purchase_url': courses_left_to_purchase_url,
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}
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return program_key
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# TODO: clean up as part of REVEM-199 (START)
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