add cron to flush objekt stats cache every hour

src/app/api/cron/objekt-stats/route.ts

@@ -0,0 +1,19 @@
+import { env } from "@/env";
+import { revalidateTag } from "next/cache";
+
+/**
+ * Flush the objekt stats cache.
+ */
+export function GET(req: Request) {
+  const authHeader = req.headers.get("authorization");
+  if (authHeader !== `Bearer ${env.CRON_SECRET}`) {
+    return new Response("unauthorized", {
+      status: 401,
+    });
+  }
+
+  // flush the cache tag
+  revalidateTag("objekt-stats");
+
+  return new Response("ok");
+}

src/lib/server/objekts/stats.ts

@@ -173,12 +173,12 @@ async function fetchObjektStats(): Promise<ObjektStats> {
 
 /**
  * Get the stats for the fixed 24-hour window.
- * Cached for 1 hour.
+ * Cached for 2 hours, but a cron job flushes the cache every hour.
  */
 export const getObjektStats = unstable_cache(
   fetchObjektStats,
   ["objekt-stats"],
   {
-    revalidate: 60 * 60, // 1 hour
+    revalidate: 60 * 60 * 2, // 2 hours
   }
 );

vercel.json

@@ -5,6 +5,10 @@
     {
       "path": "/api/cron/gravity",
       "schedule": "*/30 * * * *"
+    },
+    {
+      "path": "/api/cron/objekt-stats",
+      "schedule": "0 * * * *"
     }
   ]
 }