Implement a stub unified course tab

lms/djangoapps/courseware/tabs.py

@@ -2,6 +2,8 @@
 This module is essentially a broker to xmodule/tabs.py -- it was originally introduced to
 perform some LMS-specific tab display gymnastics for the Entrance Exams feature
 """
+import waffle
+
 from django.conf import settings
 from django.utils.translation import ugettext as _, ugettext_noop
 
@@ -9,7 +11,7 @@ from courseware.access import has_access
 from courseware.entrance_exams import user_must_complete_entrance_exam
 from openedx.core.lib.course_tabs import CourseTabPluginManager
 from student.models import CourseEnrollment
-from xmodule.tabs import CourseTab, CourseTabList, key_checker
+from xmodule.tabs import CourseTab, CourseTabList, key_checker, link_reverse_func
 
 
 class EnrolledTab(CourseTab):
@@ -34,6 +36,16 @@ class CoursewareTab(EnrolledTab):
     is_movable = False
     is_default = False
 
+    @property
+    def link_func(self):
+        """
+        Returns a function that computes the URL for this tab.
+        """
+        if waffle.switch_is_active('unified_course_view'):
+            return link_reverse_func('unified_course_view')
+        else:
+            return link_reverse_func('courseware')
+
 
 class CourseInfoTab(CourseTab):
     """

lms/djangoapps/courseware/views/views.py

@@ -25,6 +25,7 @@ from django.http import (
     QueryDict,
 )
 from django.shortcuts import redirect
+from django.template.loader import render_to_string
 from django.utils.decorators import method_decorator
 from django.utils.timezone import UTC
 from django.utils.translation import ugettext as _
@@ -1623,3 +1624,55 @@ def financial_assistance_form(request):
             }
         ],
     })
+
+
+class UnifiedCourseView(View):
+    """
+    Unified view for a course.
+    """
+    @method_decorator(login_required)
+    @method_decorator(ensure_csrf_cookie)
+    @method_decorator(cache_control(no_cache=True, no_store=True, must_revalidate=True))
+    @method_decorator(ensure_valid_course_key)
+    def get(self, request, course_id):
+        """
+        Displays the main view for the specified course.
+
+        Arguments:
+            request: HTTP request
+            course_id (unicode): course id
+        """
+        course_key = CourseKey.from_string(course_id)
+        course = get_course_with_access(request.user, 'load', course_key, check_if_enrolled=True)
+
+        # Render the outline as a fragment
+        outline_fragment = CourseOutlineFragmentView().render_fragment(request, course_id=course_id)
+
+        # Render the entire unified course view
+        context = {
+            'csrf': csrf(request)['csrf_token'],
+            'course': course,
+            'outline_fragment': outline_fragment,
+            'disable_courseware_js': True,
+            'uses_pattern_library': True,
+        }
+        return render_to_response('courseware/unified-course-view.html', context)
+
+
+class CourseOutlineFragmentView(FragmentView):
+    """
+    Course outline fragment to be shown in the unified course view.
+    """
+
+    def render_fragment(self, request, course_id=None):
+        """
+        Renders the course outline as a fragment.
+        """
+        course_key = CourseKey.from_string(course_id)
+        course = get_course_with_access(request.user, 'load', course_key, check_if_enrolled=True)
+        context = {
+            'csrf': csrf(request)['csrf_token'],
+            'course': course,
+        }
+        html = render_to_string('courseware/course-outline.html', context)
+        return Fragment(html)