chore: cleanup get_cockpit_type a bit

server/vbv_lernwelt/api/user.py

@@ -14,19 +14,25 @@ from vbv_lernwelt.learning_mentor.models import LearningMentor
 def get_cockpit_type(request, course_id: int):
     course = get_object_or_404(Course, id=course_id)
 
-    cockpit_type = None
+    is_mentor = LearningMentor.objects.filter(
+        mentor=request.user, course=course
+    ).exists()
 
-    if LearningMentor.objects.filter(mentor=request.user, course=course).exists():
-        cockpit_type = "mentor"
-    elif CourseSessionUser.objects.filter(
+    is_expert = CourseSessionUser.objects.filter(
         user=request.user,
         course_session__course=course,
         role=CourseSessionUser.Role.EXPERT,
-    ).exists():
-        cockpit_type = "expert"
-    elif CourseSessionGroup.objects.filter(
+    ).exists()
+
+    is_supervisor = CourseSessionGroup.objects.filter(
         course_session__course=course, supervisor=request.user
-    ).exists():
+    ).exists()
+
+    if is_mentor:
+        cockpit_type = "mentor"
+    elif is_expert or is_supervisor:
         cockpit_type = "expert"
+    else:
+        cockpit_type = None
 
     return Response({"type": cockpit_type})