refactoring

Resolve #7779

packages/backend/src/daemons/janitor.ts

@@ -0,0 +1,20 @@
+// TODO: 消したい
+
+const interval = 30 * 60 * 1000;
+import { AttestationChallenges } from '@/models/index';
+import { LessThan } from 'typeorm';
+
+/**
+ * Clean up database occasionally
+ */
+export default function() {
+	async function tick() {
+		await AttestationChallenges.delete({
+			createdAt: LessThan(new Date(new Date().getTime() - 5 * 60 * 1000))
+		});
+	}
+
+	tick();
+
+	setInterval(tick, interval);
+}