125 lines
4.0 KiB
Python
125 lines
4.0 KiB
Python
# -*- coding: utf-8 -*-
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"""
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Contains code related to computing discount percentage
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and discount applicability.
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WARNING:
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Keep in mind that the code in this file only applies to discounts controlled in the lms like the first purchase offer,
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not other discounts like coupons or enterprise/program offers configured in ecommerce.
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"""
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from __future__ import absolute_import
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from datetime import datetime
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import crum
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import pytz
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from course_modes.models import CourseMode
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from entitlements.models import CourseEntitlement
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from lms.djangoapps.experiments.stable_bucketing import stable_bucketing_hash_group
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from openedx.core.djangoapps.waffle_utils import WaffleFlag, WaffleFlagNamespace
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from openedx.features.discounts.models import DiscountRestrictionConfig
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from student.models import CourseEnrollment
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from track import segment
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# .. feature_toggle_name: discounts.enable_discounting
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# .. feature_toggle_type: flag
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# .. feature_toggle_default: False
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# .. feature_toggle_description: Toggle discounts always being disabled
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# .. feature_toggle_category: discounts
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# .. feature_toggle_use_cases: monitored_rollout
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# .. feature_toggle_creation_date: 2019-4-16
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# .. feature_toggle_expiration_date: None
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# .. feature_toggle_warnings: None
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# .. feature_toggle_tickets: REVEM-282
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# .. feature_toggle_status: supported
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DISCOUNT_APPLICABILITY_FLAG = WaffleFlag(
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waffle_namespace=WaffleFlagNamespace(name=u'discounts'),
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flag_name=u'enable_discounting',
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flag_undefined_default=False
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)
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DISCOUNT_APPLICABILITY_HOLDBACK = 'first_purchase_discount_holdback'
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def can_receive_discount(user, course): # pylint: disable=unused-argument
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"""
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Check all the business logic about whether this combination of user and course
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can receive a discount.
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"""
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# Always disable discounts until we are ready to enable this feature
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if not DISCOUNT_APPLICABILITY_FLAG.is_enabled():
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return False
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# TODO: Add additional conditions to return False here
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# Course end date needs to be in the future
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if course.has_ended():
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return False
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# Course needs to have a non-expired verified mode
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modes_dict = CourseMode.modes_for_course_dict(course=course, include_expired=False)
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verified_mode = modes_dict.get('verified', None)
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if not verified_mode:
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return False
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# Site, Partner, Course or Course Run not excluded from lms-controlled discounts
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if DiscountRestrictionConfig.disabled_for_course_stacked_config(course):
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return False
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# Don't allow users who have enrolled in any courses in non-upsellable
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# modes
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if CourseEnrollment.objects.filter(user=user).exclude(mode__in=CourseMode.UPSELL_TO_VERIFIED_MODES).exists():
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return False
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# Don't allow any users who have entitlements (past or present)
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if CourseEntitlement.objects.filter(user=user).exists():
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return False
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# Excute holdback
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if _is_in_holdback(user):
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return False
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return True
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def _is_in_holdback(user):
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"""
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Return whether the specified user is in the first-purchase-discount holdback group.
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"""
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if datetime(2020, 8, 1, tzinfo=pytz.UTC) <= datetime.now(tz=pytz.UTC):
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return False
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# Holdback is 50/50
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bucket = stable_bucketing_hash_group(DISCOUNT_APPLICABILITY_HOLDBACK, 2, user.username)
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request = crum.get_current_request()
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if hasattr(request, 'session') and DISCOUNT_APPLICABILITY_HOLDBACK not in request.session:
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properties = {
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'site': request.site.domain,
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'app_label': 'discounts',
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'nonInteraction': 1,
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'bucket': bucket,
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'experiment': 'REVEM-363',
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}
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segment.track(
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user_id=user.id,
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event_name='edx.bi.experiment.user.bucketed',
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properties=properties,
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)
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# Mark that we've recorded this bucketing, so that we don't do it again this session
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request.session[DISCOUNT_APPLICABILITY_HOLDBACK] = True
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return bucket == 0
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def discount_percentage():
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"""
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Get the configured discount amount.
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"""
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# TODO: Add configuration information here
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return 15
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