AA-123 welcome message

lms/djangoapps/course_home_api/outline/v1/serializers.py

@@ -62,3 +62,4 @@ class OutlineTabSerializer(serializers.Serializer):
     course_tools = CourseToolSerializer(many=True)
     dates_widget = DatesWidgetSerializer()
     handouts_html = serializers.CharField()
+    welcome_message_html = serializers.CharField()

lms/djangoapps/course_home_api/outline/v1/tests/test_views.py

@@ -8,6 +8,7 @@ from django.urls import reverse
 from course_modes.models import CourseMode
 from lms.djangoapps.course_home_api.tests.utils import BaseCourseHomeTests
 from openedx.core.djangoapps.user_api.preferences.api import set_user_preference
+from openedx.core.djangoapps.user_api.tests.factories import UserCourseTagFactory
 from openedx.features.course_experience import COURSE_ENABLE_UNENROLLED_ACCESS_FLAG
 from student.models import CourseEnrollment
 from student.tests.factories import UserFactory
@@ -97,3 +98,27 @@ class OutlineTabTestViews(BaseCourseHomeTests):
         self.assertEqual(handouts_html, '<p>Hi</p>' if handouts_visible else '')
 
     # TODO: write test_get_unknown_course when more data is pulled into the Outline Tab API
+
+    @ddt.data(True, False)
+    def test_welcome_message(self, welcome_message_is_dismissed):
+        self.store.create_item(
+            self.user.id, self.course.id,
+            'course_info',
+            'updates',
+            fields={
+                'items': [{
+                    'content': '<p>Welcome</p>',
+                    'status': 'visible',
+                    'date': 'July 23, 2020',
+                    'id': 1
+                }]
+            }
+        )
+        UserCourseTagFactory(
+            user=self.user,
+            course_id=self.course.id,
+            key='view-welcome-message',
+            value=False if welcome_message_is_dismissed else True
+        )
+        welcome_message_html = self.client.get(self.url).data['welcome_message_html']
+        self.assertEqual(welcome_message_html, None if welcome_message_is_dismissed else '<p>Welcome</p>')

lms/djangoapps/course_home_api/outline/v1/views.py

@@ -2,11 +2,15 @@
 Outline Tab Views
 """
 
+from rest_framework.decorators import api_view, authentication_classes, permission_classes
+from rest_framework.exceptions import APIException, ParseError
 from rest_framework.generics import RetrieveAPIView
 from rest_framework.permissions import IsAuthenticated
 from rest_framework.response import Response
 
+from django.utils.translation import ugettext as _
 from edx_django_utils import monitoring as monitoring_utils
+from edx_rest_framework_extensions.auth.jwt.authentication import JwtAuthentication
 from django.urls import reverse
 from opaque_keys.edx.keys import CourseKey
 
@@ -21,13 +25,22 @@ from lms.djangoapps.courseware.courses import get_course_date_blocks, get_course
 from lms.djangoapps.courseware.date_summary import TodaysDate
 from lms.djangoapps.courseware.masquerade import setup_masquerade
 from openedx.core.djangoapps.content.block_structure.transformers import BlockStructureTransformers
+from openedx.core.djangoapps.user_api.course_tag.api import get_course_tag, set_course_tag
+from openedx.features.course_experience import COURSE_ENABLE_UNENROLLED_ACCESS_FLAG, LATEST_UPDATE_FLAG
 from openedx.features.course_experience.course_tools import CourseToolsPluginManager
-from openedx.features.course_experience import COURSE_ENABLE_UNENROLLED_ACCESS_FLAG
+from openedx.features.course_experience.views.latest_update import LatestUpdateFragmentView
+from openedx.features.course_experience.views.welcome_message import PREFERENCE_KEY, WelcomeMessageFragmentView
 from student.models import CourseEnrollment
 from xmodule.course_module import COURSE_VISIBILITY_PUBLIC
 from xmodule.modulestore.django import modulestore
 
 
+class UnableToDismissWelcomeMessage(APIException):
+    status_code = 400
+    default_detail = 'Unable to dismiss welcome message.'
+    default_code = 'unable_to_dismiss_welcome_message'
+
+
 class OutlineTabView(RetrieveAPIView):
     """
     **Use Cases**
@@ -99,6 +112,13 @@ class OutlineTabView(RetrieveAPIView):
         show_handouts = is_enrolled or is_staff or allow_public
         handouts_html = get_course_info_section(request, request.user, course, 'handouts') if show_handouts else ''
 
+        welcome_message_html = None
+        if get_course_tag(request.user, course_key, PREFERENCE_KEY) != 'False':
+            if LATEST_UPDATE_FLAG.is_enabled(course_key):
+                welcome_message_html = LatestUpdateFragmentView().latest_update_html(request, course)
+            else:
+                welcome_message_html = WelcomeMessageFragmentView().welcome_message_html(request, course)
+
         course_tools = CourseToolsPluginManager.get_enabled_course_tools(request, course_key)
         date_blocks = get_course_date_blocks(course, request.user, request, num_assignments=1)
 
@@ -129,9 +149,32 @@ class OutlineTabView(RetrieveAPIView):
             'course_tools': course_tools,
             'dates_widget': dates_widget,
             'handouts_html': handouts_html,
+            'welcome_message_html': welcome_message_html,
         }
         context = self.get_serializer_context()
         context['course_key'] = course_key
         serializer = self.get_serializer_class()(data, context=context)
 
         return Response(serializer.data)
+
+
+@api_view(['POST'])
+@authentication_classes((JwtAuthentication,))
+@permission_classes((IsAuthenticated,))
+def dismiss_welcome_message(request):
+    course_id = request.data.get('course_id', None)
+
+    # If body doesnt contain 'course_id', return 400 to client.
+    if not course_id:
+        raise ParseError(_("'course_id' is required."))
+
+    # If body contains params other than 'course_id', return 400 to client.
+    if len(request.data) > 1:
+        raise ParseError(_("Only 'course_id' is expected."))
+
+    try:
+        course_key = CourseKey.from_string(course_id)
+        set_course_tag(request.user, course_key, PREFERENCE_KEY, 'False')
+        return Response({'message': _('Welcome message successfully dismissed.')})
+    except Exception:
+        raise UnableToDismissWelcomeMessage

lms/djangoapps/course_home_api/urls.py

@@ -8,7 +8,7 @@ from django.urls import re_path
 
 from lms.djangoapps.course_home_api.dates.v1.views import DatesTabView
 from lms.djangoapps.course_home_api.course_metadata.v1.views import CourseHomeMetadataView
-from lms.djangoapps.course_home_api.outline.v1.views import OutlineTabView
+from lms.djangoapps.course_home_api.outline.v1.views import OutlineTabView, dismiss_welcome_message
 from lms.djangoapps.course_home_api.progress.v1.views import ProgressTabView
 
 urlpatterns = []
@@ -40,6 +40,14 @@ urlpatterns += [
     ),
 ]
 
+urlpatterns += [
+    re_path(
+        r'v1/dismiss_welcome_message',
+        dismiss_welcome_message,
+        name='course-experience-dismiss-welcome-message'
+    ),
+]
+
 # Progress Tab URLs
 urlpatterns += [
     re_path(