add expiration banner

openedx/features/course_duration_limits/access.py

@@ -12,9 +12,12 @@ from django.utils.translation import ugettext as _
 from util.date_utils import DEFAULT_SHORT_DATE_FORMAT, strftime_localized
 from lms.djangoapps.courseware.access_response import AccessError
 from lms.djangoapps.courseware.access_utils import ACCESS_GRANTED
+from lms.djangoapps.courseware.date_summary import verified_upgrade_deadline_link
 from openedx.core.djangoapps.catalog.utils import get_course_run_details
 from openedx.core.djangoapps.content.course_overviews.models import CourseOverview
-
+from openedx.core.djangoapps.util.user_messages import PageLevelMessages
+from openedx.core.djangolib.markup import HTML
+from openedx.features.course_duration_limits.config import CONTENT_TYPE_GATING_FLAG
 
 MIN_DURATION = timedelta(weeks=4)
 MAX_DURATION = timedelta(weeks=12)
@@ -91,3 +94,21 @@ def check_course_expired(user, course):
         return AuditExpiredError(user, course, expiration_date)
 
     return ACCESS_GRANTED
+
+
+def register_course_expired_message(request, course):
+    """
+    Add a banner notifying the user of the user course expiration date if it exists.
+    """
+    if CONTENT_TYPE_GATING_FLAG.is_enabled():
+        expiration_date = get_user_course_expiration_date(request.user, course)
+        if expiration_date:
+            upgrade_message = _('Your access to this course expires on {expiration_date}. \
+                    <a href="{upgrade_link}">Upgrade now</a> for unlimited access.')
+            PageLevelMessages.register_info_message(
+                request,
+                HTML(upgrade_message).format(
+                    expiration_date=expiration_date.strftime('%b %-d'),
+                    upgrade_link=verified_upgrade_deadline_link(user=request.user, course=course)
+                )
+            )