refactoring

Resolve #7779

packages/backend/src/server/api/endpoints/federation/show-instance.ts

@@ -0,0 +1,29 @@
+import $ from 'cafy';
+import define from '../../define';
+import { Instances } from '@/models/index';
+import { toPuny } from '@/misc/convert-host';
+
+export const meta = {
+	tags: ['federation'],
+
+	requireCredential: false as const,
+
+	params: {
+		host: {
+			validator: $.str
+		}
+	},
+
+	res: {
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
+		ref: 'FederationInstance'
+	}
+};
+
+export default define(meta, async (ps, me) => {
+	const instance = await Instances
+		.findOne({ host: toPuny(ps.host) });
+
+	return instance;
+});