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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| """ | ||
| Helpers that can be useful throughout Joanie's core app | ||
| """ | ||
| from django.core.exceptions import ValidationError | ||
| from django.utils import timezone | ||
|
|
||
| from joanie.core import enums, models | ||
|
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|
|
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| def generate_certificate_for_order(order): | ||
| """ | ||
| Check if order is eligible for certification then generate certificate is it is. | ||
| Eligibility means that order contains | ||
| one passed enrollment per graded courses. | ||
| Return: | ||
| 0 : if the order is not eligible for certification | ||
| 1: if a certificate has been generated for the current order | ||
| """ | ||
| graded_courses = order.target_courses.filter( | ||
| order_relations__is_graded=True | ||
| ).order_by("order_relations__position") | ||
| graded_courses_count = len(graded_courses) | ||
|
|
||
| if graded_courses_count == 0: | ||
| return 0 | ||
|
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| course_runs = models.CourseRun.objects.filter( | ||
| course__in=graded_courses, | ||
| is_gradable=True, | ||
| start__lte=timezone.now(), | ||
| ) | ||
|
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| enrollments = order.enrollments.filter( | ||
| course_run__in=course_runs, is_active=True | ||
| ).select_related("user", "course_run") | ||
|
|
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| # Cross graded courses and enrollments to check there is an active enrollment | ||
| # for each graded courses, if not it is useless to go further | ||
| course_enrollments = [] | ||
| for course in graded_courses: | ||
| for enrollment in enrollments.iterator(): | ||
| # Check if the enrollment relies on course by crossing | ||
| # all course runs implied | ||
| if course.course_runs.filter( | ||
| resource_link=enrollment.course_run.resource_link | ||
| ).exists(): | ||
| course_enrollments.append(enrollment) | ||
| break | ||
|
|
||
| # If we do not have one enrollment per graded course, there is no need to | ||
| # continue, we are sure that order is not eligible for certification. | ||
| if len(course_enrollments) != graded_courses_count: | ||
| return 0 | ||
|
|
||
| # Otherwise, we now need to know if each enrollment has been passed | ||
| passed_enrollment_count = 0 | ||
| for enrollment in course_enrollments: | ||
| if enrollment.is_passed is False: | ||
| # If one enrollment has not been passed, no need to continue, | ||
| # We are sure that order is not eligible for certification. | ||
| break | ||
| passed_enrollment_count += 1 | ||
|
|
||
| if passed_enrollment_count != graded_courses_count: | ||
| return 0 | ||
|
|
||
| try: | ||
| order.create_certificate() | ||
| except ValidationError: | ||
| return 0 | ||
|
|
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| return 1 | ||
|
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|
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| def generate_certificates_for_orders(orders): | ||
| """ | ||
| Iterate over the provided orders and check if they are eligible for certification | ||
| then return the count of generated certificates. | ||
| """ | ||
| total = 0 | ||
|
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| orders = [ | ||
| order | ||
| for order in orders.filter( | ||
| is_canceled=False, | ||
| certificate__isnull=True, | ||
| product__type__in=enums.PRODUCT_TYPE_CERTIFICATE_ALLOWED, | ||
| ) | ||
| .select_related("course__organization") | ||
| .iterator() | ||
| if order.state == enums.ORDER_STATE_VALIDATED | ||
| ] | ||
|
|
||
| for order in orders: | ||
| result = generate_certificate_for_order(order) | ||
| total += result | ||
|
|
||
| return total |
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