refactor: migrate TikTok polling from external cron to internal Next.js instrumentation interval

docker-compose.yml

@@ -14,10 +14,3 @@ services:
       - erika
     restart: unless-stopped
 
-  cron:
-    image: curlimages/curl
-    network_mode: host
-    restart: unless-stopped
-    env_file:
-      - .env
-    command: /bin/sh -c "while true; do echo \"[$$(date)] Triggering TikTok cron...\"; curl -s \"http://localhost:3000/api/cron/tiktok?secret=$${CRON_SECRET}\"; echo \"\"; sleep 300; done"

instrumentation.ts

@@ -0,0 +1,6 @@
+export async function register() {
+  if (process.env.NEXT_RUNTIME === 'nodejs') {
+    const { startTiktokFeedInterval } = await import('@/lib/autofeed');
+    startTiktokFeedInterval();
+  }
+}

lib/autofeed.ts

@@ -1,35 +1,20 @@
-import { NextResponse } from "next/server";
-import { getLatestTiktokVideo, getTiktokProfile } from "@/lib/followers/tiktok";
 import { getRedisClient } from "@/lib/redis";
 import { sendDiscordNotification } from "@/lib/discord";
+import { getLatestTiktokVideo, getTiktokProfile } from "@/lib/followers/tiktok";
 
-export async function GET(req: Request) {
+async function checkTiktokFeed() {
   try {
-    const { searchParams } = new URL(req.url);
-    
-    // 1. Verify cron secret
-    const cronSecret = process.env.CRON_SECRET;
-    if (!cronSecret || searchParams.get("secret") !== cronSecret) {
-      return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
-    }
-
-    // 2. Fetch the latest video from TikTok API
     const latestVideo = await getLatestTiktokVideo();
-    if (!latestVideo) {
-      return NextResponse.json({ message: "No videos found or failed to fetch." }, { status: 200 });
-    }
+    if (!latestVideo) return;
 
-    // 3. Check Redis to see if we've already notified about this video
     const redis = await getRedisClient();
     const redisKey = "erika:tiktok_last_video_id";
     const lastVideoId = await redis.get(redisKey);
 
     if (lastVideoId === latestVideo.id) {
-      // Already notified
-      return NextResponse.json({ message: "No new videos.", id: latestVideo.id }, { status: 200 });
+      return; // Already notified
     }
 
-    // 4. We have a new video! Prepare the notification
     let officialAuthorName = "TikTok";
     let officialAvatarUrl: string | undefined = undefined;
     try {
@@ -37,7 +22,7 @@ export async function GET(req: Request) {
       if (profile.displayName) officialAuthorName = profile.displayName;
       if (profile.avatarUrl) officialAvatarUrl = profile.avatarUrl;
     } catch (e) {
-      console.error("[TikTok Cron] Failed to fetch profile:", e);
+      console.error("[TikTok Feed] Failed to fetch profile:", e);
     }
 
     const message = `ลงคลิปใหม่แล้วววสสสสส ${latestVideo.shareUrl}`;
@@ -53,16 +38,22 @@ export async function GET(req: Request) {
       image: latestVideo.coverImageUrl ? { url: latestVideo.coverImageUrl } : undefined
     };
 
-    // 5. Send Discord notification
     await sendDiscordNotification(message, embed);
-
-    // 6. Update Redis with the new video ID
-    // We don't set an expiry because we want to remember it forever (until the next video)
     await redis.set(redisKey, latestVideo.id);
-
-    return NextResponse.json({ success: true, message: "New video notified!", id: latestVideo.id }, { status: 200 });
   } catch (error) {
-    console.error("[TikTok Cron] Error processing request:", error);
-    return NextResponse.json({ error: "Internal Server Error" }, { status: 500 });
+    console.error("[TikTok Feed] Error processing:", error);
+  }
+}
+
+export function startTiktokFeedInterval() {
+  if (!(global as any).tiktokFeedIntervalStarted) {
+    (global as any).tiktokFeedIntervalStarted = true;
+    console.log("[TikTok Feed] Starting 5-minute interval check in background...");
+    
+    // Run immediately on start
+    checkTiktokFeed();
+    
+    // Then every 5 minutes
+    setInterval(checkTiktokFeed, 5 * 60 * 1000);
   }
 }

lib/followers/tiktok.ts

@@ -1,12 +1,3 @@
-/**
- * Fetches TikTok follower count using the official TikTok API v2.
- *
- * Required env vars:
- * - TIKTOK_CLIENT_KEY
- * - TIKTOK_CLIENT_SECRET
- * - TIKTOK_REFRESH_TOKEN (obtained via one-time OAuth flow at /api/auth/tiktok)
- */
-
 let cachedAccessToken: string | null = null;
 let tokenExpiresAt = 0;