Refactor course access check

server/vbv_lernwelt/course/permissions.py

@@ -1,15 +1,17 @@
 from vbv_lernwelt.course.models import CourseSessionUser
 
 
-def has_course_access(request, obj):
-    if request.user.is_superuser:
-        return True
+def has_course_access_by_page_request(request, obj):
+    return has_course_access(request.user, obj.specific.get_course())
 
-    course = obj.specific.get_course()
+
+def has_course_access(user, course):
+    if user.is_superuser:
+        return True
 
     # attached to CourseSession
     course_session = CourseSessionUser.objects.filter(
-        course_session__course_id=course.id, user=request.user
+        course_session__course_id=course.id, user=user
     ).exists()
 
     if course_session:

server/vbv_lernwelt/course/views.py

@@ -6,7 +6,9 @@ from wagtail.models import Page
 
 from vbv_lernwelt.core.utils import api_page_cache_get_or_set
 from vbv_lernwelt.course.models import CourseCompletion
-from vbv_lernwelt.course.permissions import has_course_access
+from vbv_lernwelt.course.permissions import (
+    has_course_access_by_page_request,
+)
 from vbv_lernwelt.course.serializers import CourseCompletionSerializer
 from vbv_lernwelt.learnpath.utils import get_wagtail_type
 
@@ -17,7 +19,7 @@ logger = structlog.get_logger(__name__)
 def course_page_api_view(request, slug):
     try:
         page = Page.objects.get(slug=slug, locale__language_code="de-CH")
-        if not has_course_access(request, page):
+        if not has_course_access_by_page_request(request, page):
             raise PermissionDenied()
 
         data = api_page_cache_get_or_set(
@@ -56,7 +58,7 @@ def mark_course_completion(request):
         completion_status = request.data.get("completion_status", "success")
 
         page = Page.objects.get(translation_key=page_key, locale__language_code="de-CH")
-        if not has_course_access(request, page):
+        if not has_course_access_by_page_request(request, page):
             raise PermissionDenied()
 
         page_type = get_wagtail_type(page.specific)