Add an account activation step in the signing request flow when needed

Signed-off-by: Émile Ré <emile@getprobo.com>

apps/console/src/hooks/useSafeContinueUrl.ts

@@ -0,0 +1,22 @@
+import { useSearchParams } from "react-router";
+
+export function useSafeContinueUrl(fallbackUrl?: URL): URL {
+  fallbackUrl = new URL(fallbackUrl ?? window.location.origin, window.location.origin);
+  const [searchParams] = useSearchParams();
+
+  const continueUrlParam = searchParams.get("continue");
+  let safeContinueUrl: URL;
+  if (continueUrlParam) {
+    let continueUrl: URL;
+    try {
+      continueUrl = new URL(continueUrlParam, window.location.origin);
+    } catch {
+      continueUrl = fallbackUrl;
+    }
+    safeContinueUrl = new URL(continueUrl.pathname + continueUrl.search, window.location.origin);
+  } else {
+    safeContinueUrl = fallbackUrl;
+  }
+
+  return safeContinueUrl;
+}