Move view_course_access functionality to sole caller lms/mobile_api.

lms/djangoapps/mobile_api/utils.py

@@ -1,14 +1,47 @@
 """
 Common utility methods and decorators for Mobile APIs.
 """
-from openedx.core.lib.api.view_utils import view_course_access, view_auth_classes
+import functools
+from rest_framework import status
+from rest_framework.response import Response
+
+from lms.djangoapps.courseware.courses import get_course_with_access
+from lms.djangoapps.courseware.courseware_access_exception import CoursewareAccessException
+from opaque_keys.edx.keys import CourseKey
+from openedx.core.lib.api.view_utils import view_auth_classes
+from xmodule.modulestore.django import modulestore
 
 
 def mobile_course_access(depth=0):
     """
     Method decorator for a mobile API endpoint that verifies the user has access to the course in a mobile context.
     """
-    return view_course_access(depth=depth, access_action='load_mobile', check_for_milestones=True)
+    def _decorator(func):
+        """Outer method decorator."""
+
+        @functools.wraps(func)
+        def _wrapper(self, request, *args, **kwargs):
+            """
+            Expects kwargs to contain 'course_id'.
+            Passes the course descriptor to the given decorated function.
+            Raises 404 if access to course is disallowed.
+            """
+            course_id = CourseKey.from_string(kwargs.pop('course_id'))
+            with modulestore().bulk_operations(course_id):
+                try:
+                    course = get_course_with_access(
+                        request.user,
+                        'load_mobile',
+                        course_id,
+                        depth=depth,
+                        check_if_enrolled=True,
+                    )
+                except CoursewareAccessException as error:
+                    return Response(data=error.to_json(), status=status.HTTP_404_NOT_FOUND)
+                return func(self, request, course=course, *args, **kwargs)
+
+        return _wrapper
+    return _decorator
 
 
 def mobile_view(is_user=False):