Fix migration dashboard

Fix #98

Author: dahlia

CHANGES.md

@@ -6,6 +6,12 @@ Version 0.4.5
 
 To be released.
 
+ -  Fixed the bug where the migration dashboard had not been shown correctly
+    when the aliases of the account contained an actor whose the server was
+    unreachable.  [[#98]]
+
+[#98]: https://github.com/fedify-dev/hollo/issues/98
+
 
 Version 0.4.4
 -------------

src/pages/accounts.tsx

@@ -441,10 +441,19 @@ accounts.get("/:id/migrate", async (c) => {
   if (accountOwner == null) return c.notFound();
   const username = `@${accountOwner.handle}`;
   const aliases = await Promise.all(
-    uniq(accountOwner.account.aliases).map(async (alias) => ({
-      iri: alias,
-      handle: await getActorHandle(new URL(alias)),
-    })),
+    uniq(accountOwner.account.aliases).map(async (alias) => {
+      let handle: Awaited<ReturnType<typeof getActorHandle>> | null;
+      try {
+        handle = await getActorHandle(new URL(alias));
+      } catch (e) {
+        if (e instanceof TypeError) {
+          handle = null;
+        } else {
+          throw e;
+        }
+      }
+      return { iri: alias, handle };
+    }),
   );
   const [{ followsCount }] = await db
     .select({ followsCount: count() })
@@ -497,7 +506,15 @@ accounts.get("/:id/migrate", async (c) => {
           <ul>
             {aliases.map(({ iri, handle }) => (
               <li>
-                <tt>{handle}</tt> (<tt>{iri}</tt>)
+                {handle == null ? (
+                  <>
+                    <tt>{iri}</tt> (The server is not available.)
+                  </>
+                ) : (
+                  <>
+                    <tt>{handle}</tt> (<tt>{iri}</tt>)
+                  </>
+                )}
               </li>
             ))}
           </ul>