AA-117 mfe date tab waffle flag

- create master course home waffle flag
- create course waffle flag for accessing the mfe dates tab

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

@@ -9,6 +9,7 @@ from django.urls import reverse
 
 from course_modes.models import CourseMode
 from lms.djangoapps.course_home_api.tests.utils import BaseCourseHomeTests
+from lms.djangoapps.course_home_api.toggles import COURSE_HOME_MICROFRONTEND, COURSE_HOME_MICROFRONTEND_DATES_TAB
 from student.models import CourseEnrollment
 
 
@@ -22,6 +23,8 @@ class DatesTabTestViews(BaseCourseHomeTests):
         BaseCourseHomeTests.setUpClass()
         cls.url = reverse('course-home-dates-tab', args=[cls.course.id])
 
+    @COURSE_HOME_MICROFRONTEND.override(active=True)
+    @COURSE_HOME_MICROFRONTEND_DATES_TAB.override(active=True)
     @ddt.data(CourseMode.AUDIT, CourseMode.VERIFIED)
     def test_get_authenticated_enrolled_user(self, enrollment_mode):
         CourseEnrollment.enroll(self.user, self.course.id, enrollment_mode)
@@ -38,6 +41,8 @@ class DatesTabTestViews(BaseCourseHomeTests):
             self.assertTrue(response.data.get('learner_is_verified'))
             self.assertTrue(all(block.get('learner_has_access') for block in date_blocks))
 
+    @COURSE_HOME_MICROFRONTEND.override(active=True)
+    @COURSE_HOME_MICROFRONTEND_DATES_TAB.override(active=True)
     def test_get_authenticated_user_not_enrolled(self):
         response = self.client.get(self.url)
         self.assertEqual(response.status_code, 200)
@@ -48,6 +53,8 @@ class DatesTabTestViews(BaseCourseHomeTests):
         response = self.client.get(self.url)
         self.assertEqual(response.status_code, 403)
 
+    @COURSE_HOME_MICROFRONTEND.override(active=True)
+    @COURSE_HOME_MICROFRONTEND_DATES_TAB.override(active=True)
     def test_get_unknown_course(self):
         url = reverse('course-home-dates-tab', args=['course-v1:unknown+course+2T2020'])
         response = self.client.get(url)

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

@@ -3,6 +3,7 @@ Dates Tab Views
 """
 
 
+from rest_framework import status
 from rest_framework.generics import RetrieveAPIView
 from rest_framework.permissions import IsAuthenticated
 from rest_framework.response import Response
@@ -14,6 +15,7 @@ from lms.djangoapps.courseware.context_processor import user_timezone_locale_pre
 from lms.djangoapps.courseware.courses import get_course_date_blocks, get_course_with_access
 from lms.djangoapps.courseware.date_summary import TodaysDate, verified_upgrade_deadline_link
 from lms.djangoapps.course_home_api.dates.v1.serializers import DatesTabSerializer
+from lms.djangoapps.course_home_api.toggles import course_home_mfe_dates_tab_is_active
 from openedx.core.djangoapps.enrollments.api import get_enrollment
 from openedx.features.course_experience.utils import dates_banner_should_display
 
@@ -58,13 +60,16 @@ class DatesTabView(RetrieveAPIView):
 
     def get(self, request, *args, **kwargs):
         course_key_string = kwargs.get('course_key_string')
+        course_key = CourseKey.from_string(course_key_string)
+
+        if not course_home_mfe_dates_tab_is_active(course_key):
+            return Response(status=status.HTTP_404_NOT_FOUND)
 
         # Enable NR tracing for this view based on course
         monitoring_utils.set_custom_metric('course_id', course_key_string)
         monitoring_utils.set_custom_metric('user_id', request.user.id)
         monitoring_utils.set_custom_metric('is_staff', request.user.is_staff)
 
-        course_key = CourseKey.from_string(course_key_string)
         course = get_course_with_access(request.user, 'load', course_key, check_if_enrolled=False)
         blocks = get_course_date_blocks(course, request.user, request, include_access=True, include_past_dates=True)
         display_reset_dates_text, _ = dates_banner_should_display(course_key, request)

lms/djangoapps/course_home_api/toggles.py

+"""
+Toggles for course home experience.
+"""
+
+from lms.djangoapps.experiments.flags import ExperimentWaffleFlag
+from openedx.core.djangoapps.waffle_utils import CourseWaffleFlag, WaffleFlagNamespace
+
+WAFFLE_FLAG_NAMESPACE = WaffleFlagNamespace(name='course_home')
+
+COURSE_HOME_MICROFRONTEND = ExperimentWaffleFlag(WAFFLE_FLAG_NAMESPACE, 'course_home_mfe')
+
+COURSE_HOME_MICROFRONTEND_DATES_TAB = CourseWaffleFlag(WAFFLE_FLAG_NAMESPACE, 'course_home_mfe_dates_tab')
+
+
+def course_home_mfe_dates_tab_is_active(course_key):
+    return (
+        COURSE_HOME_MICROFRONTEND.is_enabled(course_key) and
+        COURSE_HOME_MICROFRONTEND_DATES_TAB.is_enabled(course_key)
+    )

lms/djangoapps/course_home_api/utils.py

+"""Utility functions for course home"""
+
+from django.conf import settings
+
+
+def get_microfrontend_url(course_key, view_name=None):
+    """
+    Takes in a course key and view name, returns the appropriate course home mfe route
+    """
+    mfe_link = '{}/course/{}'.format(settings.LEARNING_MICROFRONTEND_URL, course_key)
+
+    if view_name:
+        mfe_link += '/{}'.format(view_name)
+
+    return mfe_link

lms/djangoapps/courseware/tabs.py

@@ -11,6 +11,8 @@ from django.utils.translation import ugettext_noop
 
 from lms.djangoapps.courseware.access import has_access
 from lms.djangoapps.courseware.entrance_exams import user_can_skip_entrance_exam
+from lms.djangoapps.course_home_api.toggles import course_home_mfe_dates_tab_is_active
+from lms.djangoapps.course_home_api.utils import get_microfrontend_url
 from openedx.core.djangoapps.content.course_overviews.models import CourseOverview
 from openedx.core.lib.course_tabs import CourseTabPluginManager
 from openedx.features.course_experience import RELATIVE_DATES_FLAG, UNIFIED_COURSE_TAB_FLAG, default_course_url_name
@@ -318,6 +320,16 @@ class DatesTab(CourseTab):
     view_name = "dates"
     is_dynamic = True
 
+    def __init__(self, tab_dict):
+        def link_func(course, reverse_func):
+            if course_home_mfe_dates_tab_is_active(course.id):
+                return get_microfrontend_url(course_key=course.id, view_name=self.view_name)
+            else:
+                return reverse_func(self.view_name, args=[six.text_type(course.id)])
+
+        tab_dict['link_func'] = link_func
+        super(DatesTab, self).__init__(tab_dict)
+
     @classmethod
     def is_enabled(cls, course, user=None):
         """Returns true if this tab is enabled."""