def get_user_course_duration(user, course):
"""
Return a timedelta measuring the duration of the course for a particular user.
Business Logic:
- Course access duration is bounded by the min and max duration.
- If course fields are missing, default course access duration to MIN_DURATION.
"""
if not CourseDurationLimitConfig.enabled_for_enrollment(user, course):
return None
enrollment = CourseEnrollment.get_enrollment(user, course.id)
if enrollment is None or enrollment.mode != CourseMode.AUDIT:
return None
verified_mode = CourseMode.verified_mode_for_course(course=course,
include_expired=True)
if not verified_mode:
return None
return get_expected_duration(course.id)
def get_schedules(self):
"""
Grabs possible schedules that could receive a Course Next Section Update and if a
next section highlight is applicable for the user, yields information needed to
send the next section highlight email.
"""
target_date = self.target_datetime.date()
course_duration = get_expected_duration(self.course_id)
schedules = Schedule.objects.select_related('enrollment').filter(
self.experience_filter,
enrollment__is_active=True,
enrollment__course_id=self.course_id,
enrollment__user__is_active=True,
start_date__gte=target_date - course_duration,
start_date__lt=target_date,
)
template_context = get_base_template_context(self.site)
for schedule in schedules:
course = schedule.enrollment.course
# We don't want to show any updates if the course has ended so we short circuit here.
if course.end and course.end.date() <= target_date:
return
# Next Section Updates are only for Self-paced courses since it uses Personalized
# Learner Schedule logic. See CourseUpdateResolver for Instructor-paced updates
if not course.self_paced:
continue
user = schedule.enrollment.user
start_date = max(filter(None, (schedule.start_date, course.start)))
LOG.info('Received a schedule for user {} in course {} for date {}'.format(
user.username, self.course_id, target_date,
))
try:
week_highlights, week_num = get_next_section_highlights(user, course.id, start_date, target_date)
# (None, None) is returned when there is no section with a due date of the target_date
if week_highlights is None:
continue
except CourseUpdateDoesNotExist as e:
log_message = self.log_prefix + ': ' + str(e)
LOG.warning(log_message)
# continue to the next schedule, don't yield an email for this one
continue
unsubscribe_url = None
if (COURSE_UPDATE_SHOW_UNSUBSCRIBE_WAFFLE_SWITCH.is_enabled() and
'bulk_email_optout' in settings.ACE_ENABLED_POLICIES):
unsubscribe_url = reverse('bulk_email_opt_out', kwargs={
'token': UsernameCipher.encrypt(user.username),
'course_id': str(course.id),
})
template_context.update({
'course_name': course.display_name,
'course_url': _get_trackable_course_home_url(course.id),
'week_num': week_num,
'week_highlights': week_highlights,
# This is used by the bulk email optout policy
'course_ids': [str(course.id)],
'unsubscribe_url': unsubscribe_url,
})
template_context.update(_get_upsell_information_for_schedule(user, schedule))
yield (user, course.closest_released_language, template_context)