From c825a21b19ade9d8621e955581f7d99493d4a35c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Reynir=20Bj=C3=B6rnsson?= <reynir@reynir.dk>
Date: Wed, 13 Oct 2021 12:59:33 +0200
Subject: [PATCH] Error: Authenticator has already been registered

---
 bin/template.ml | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/bin/template.ml b/bin/template.ml
index 54bd158..a21406d 100644
--- a/bin/template.ml
+++ b/bin/template.ml
@@ -102,7 +102,12 @@ let register_view origin user =
               });
             });
           }).catch(function (err) {
-            alert("exception: " + err);
+            // XXX: only if the exception came from navigator.credentials.create()
+            if (err.name === "InvalidStateError") {
+              alert("authenticator already registered");
+            } else {
+              alert("exception: " + err);
+            }
             window.location = "/";
           });
       });