add some basic checks when batch creating users

rad/urls.py

@@ -72,6 +72,9 @@ urlpatterns = [
     path(
         "accounts/bulk_create/", views.accounts_bulk_create, name="accounts_bulk_create"
     ),
+    path(
+        "accounts/bulk_create/check", views.accounts_bulk_create_check, name="accounts_bulk_create_check"
+    ),
     path(
         "accounts/create/", generic_views.create_user, name="create_user"
     ),

rad/views.py

@@ -730,6 +730,35 @@ def accounts_check_users(request):
 
     return
 
+@user_is_cid_user_manager
+def accounts_bulk_create_check(request):
+    if not request.method == "POST":
+        return HttpResponse("Invalid request")
+
+    user = json.loads(request.POST.get("user"))
+
+    if User.objects.filter(username=user["email"]).exists():
+        return HttpResponse(format_html("<span class='error'>{}</span>", "User already exists"))
+
+    if not UserGrades.objects.filter(name=user["grade"]):
+        return HttpResponse(format_html("<span class='error'>{}</span>", "Invalid grade"))
+
+    if "supervisor_email" in user:
+        supervisor = Supervisor.objects.filter(email=user["supervisor_email"])
+
+        if not supervisor:
+            return HttpResponse("Ok, supervisor will be created")
+
+        if supervisor.count() > 1:
+            return HttpResponse(format_html("<span class='error'>{}</span>", "More than one supervisor with that email"))
+
+        if supervisor.first().name != user["supervisor_name"]:
+            return HttpResponse(format_html("<span class='error'>{}</span>", "Supervisor name does not match"))
+
+        return HttpResponse("OK, supervisor exists")
+
+    return  HttpResponse("OK")
+    
 
 @user_is_cid_user_manager
 def accounts_bulk_create(request):
@@ -781,6 +810,7 @@ def accounts_bulk_create(request):
                     try:
                         user_profile = UserProfile.objects.get(user=new_user)
                         user_profile.peninsula_trainee = True
+                        # TODO: check supervisor details are correct
                         if "supervisor_email" in user and "supervisor_name" in user:
                             s, created = Supervisor.objects.get_or_create(
                                 email=user["supervisor_email"],