allow adding users to exams by group

generic/views.py

@@ -133,6 +133,17 @@ class CidManagerRequiredMixin(UserPassesTestMixin):
 #            return obj
 #        raise PermissionDenied()  # or Http404
 
+def get_exam_model_from_app_name(app_name: str) -> ExamBase:
+    EXAM_MAP = {
+        "physics": PhysicsExam,
+        "anatomy": AnatomyExam,
+        "rapids": RapidsExam,
+        "longs": LongsExam,
+        "sbas": SbasExam,
+    }
+
+    return EXAM_MAP[app_name]
+
 
 def normaliseRapidsScore(score):
     if score == 49:
@@ -2709,6 +2720,30 @@ def cid_group_view_all(request):
         {"groups": groups, "view_all": True},
     )
 
+@user_is_cid_user_manager
+def user_group_add_candidates_to_exams(request, group_id):
+    if request.htmx:
+        group = get_object_or_404(UserUserGroup, pk=group_id)
+
+        exam_id = request.POST.get("exam_id")
+        exam_type = request.POST.get("exam_type")
+
+        ExamModel = get_exam_model_from_app_name(exam_type)
+
+        exam = get_object_or_404(ExamModel, pk=exam_id)
+
+        if request.POST.get("action") == "remove":
+            exam.valid_user_users.remove(*group.users.all())
+            return HttpResponse(f"Candidates removed")
+        else:
+            exam.valid_user_users.add(*group.users.all())
+            return HttpResponse(f"Candidates added")
+        #exam.save()
+
+
+
+    raise PermissionDenied()  # or Http404
+    pass
 
 @user_is_cid_user_manager
 def user_group_view_detail(request, group_id):