feat: plan limits

packages/lib/server-only/http/with-swr.ts

@@ -0,0 +1,28 @@
+import { NextApiResponse } from 'next';
+import { NextResponse } from 'next/server';
+
+type NarrowedResponse<T> = T extends NextResponse
+  ? NextResponse
+  : T extends NextApiResponse<infer U>
+  ? NextApiResponse<U>
+  : never;
+
+export const withStaleWhileRevalidate = <T>(
+  res: NarrowedResponse<T>,
+  cacheInSeconds = 60,
+  staleCacheInSeconds = 300,
+) => {
+  if ('headers' in res) {
+    res.headers.set(
+      'Cache-Control',
+      `public, s-maxage=${cacheInSeconds}, stale-while-revalidate=${staleCacheInSeconds}`,
+    );
+  } else {
+    res.setHeader(
+      'Cache-Control',
+      `public, s-maxage=${cacheInSeconds}, stale-while-revalidate=${staleCacheInSeconds}`,
+    );
+  }
+
+  return res;
+};