fix ISR in preview in cloudflare (#3250)

Co-authored-by: Nicolas Dorseuil <nicolas@gitbook.io>

Author: conico974

.changeset/nasty-moles-visit.md

@@ -0,0 +1,5 @@
+---
+"gitbook-v2": patch
+---
+
+fix ISR on preview env

packages/gitbook-v2/open-next.config.ts

@@ -1,5 +1,4 @@
 import { defineCloudflareConfig } from '@opennextjs/cloudflare';
-import doQueue from '@opennextjs/cloudflare/overrides/queue/do-queue';
 import doShardedTagCache from '@opennextjs/cloudflare/overrides/tag-cache/do-sharded-tag-cache';
 import {
     softTagFilter,
@@ -20,7 +19,7 @@ export default defineCloudflareConfig({
         // We don't use `revalidatePath`, so we filter out soft tags
         filterFn: softTagFilter,
     }),
-    queue: doQueue,
+    queue: () => import('./openNext/queue').then((m) => m.default),
 
     // Performance improvements as we don't use PPR
     enableCacheInterception: true,

packages/gitbook-v2/openNext/queue.ts

@@ -0,0 +1,17 @@
+import type { Queue } from '@opennextjs/aws/types/overrides.js';
+import { getCloudflareContext } from '@opennextjs/cloudflare';
+import doQueue from '@opennextjs/cloudflare/overrides/queue/do-queue';
+import memoryQueue from '@opennextjs/cloudflare/overrides/queue/memory-queue';
+
+interface Env {
+    IS_PREVIEW?: string;
+}
+
+export default {
+    name: 'GitbookISRQueue',
+    send: async (msg) => {
+        const { ctx, env } = getCloudflareContext();
+        const isPreview = (env as Env).IS_PREVIEW === 'true';
+        ctx.waitUntil(isPreview ? memoryQueue.send(msg) : doQueue.send(msg));
+    },
+} satisfies Queue;

packages/gitbook-v2/wrangler.jsonc

@@ -15,10 +15,14 @@
         "enabled": true
     },
     "vars": {
-        "NEXT_CACHE_DO_QUEUE_DISABLE_SQLITE": "true"
+        "NEXT_CACHE_DO_QUEUE_DISABLE_SQLITE": "true",
+        "IS_PREVIEW": "false"
     },
     "env": {
         "preview": {
+            "vars": {
+                "IS_PREVIEW": "true"
+            },
             "r2_buckets": [
                 {
                     "binding": "NEXT_INC_CACHE_R2_BUCKET",