Get upgrade offer banner HTML in courseware API

for use in the Learning MFE.

lms/static/sass/features/_first-purchase-banner.scss

@@ -25,3 +25,7 @@
 #seq_content .first-purchase-offer-banner {
   max-width: $text-width-readability-max;
 }
+
+body.view-in-mfe .first-purchase-offer-banner {
+  display: none;
+}

openedx/core/djangoapps/courseware_api/serializers.py

@@ -79,6 +79,7 @@ class CourseInfoSerializer(serializers.Serializer):  # pylint: disable=abstract-
     media = _CourseApiMediaCollectionSerializer(source='*')
     name = serializers.CharField(source='display_name_with_default_escaped')
     number = serializers.CharField(source='display_number_with_default')
+    offer_html = serializers.CharField()
     org = serializers.CharField(source='display_org_with_default')
     short_description = serializers.CharField()
     start = serializers.DateTimeField()

openedx/core/djangoapps/courseware_api/views.py

@@ -18,6 +18,7 @@ from student.models import CourseEnrollment
 from openedx.core.lib.api.view_utils import DeveloperErrorViewMixin
 from openedx.features.content_type_gating.models import ContentTypeGatingConfig
 from openedx.features.course_duration_limits.access import generate_course_expired_message
+from openedx.features.discounts.utils import generate_offer_html
 from xmodule.course_module import COURSE_VISIBILITY_PUBLIC
 
 from .serializers import CourseInfoSerializer
@@ -117,6 +118,8 @@ class CoursewareInformation(RetrieveAPIView):
 
         # TODO: TNL-7185 Legacy: Refactor to return the expiration date and format the message in the MFE
         overview.course_expired_message = generate_course_expired_message(self.request.user, overview)
+        # TODO: TNL-7185 Legacy: Refactor to return the offer data and format the message in the MFE
+        overview.offer_html = generate_offer_html(self.request.user, overview)
 
         course_key = CourseKey.from_string(self.kwargs['course_key_string'])
         overview.content_type_gating_enabled = ContentTypeGatingConfig.enabled_for_enrollment(