Add caching into the code to make it faster.

server/api/home/uuid_lt/action.ts

@@ -1,5 +1,17 @@
 // Check /about/scraping_line_today_home.md for more info or https://news.yuanhau.com/datainfo/linetodayjsondata.json
+interface CacheItem {
+  data: string[];
+  timestamp: number;
+}
+const cache: Record<string, CacheItem> = {};
+const CACHE_DURATION = 1000 * 60 * 60; // 1 Hour
+
 async function getLineTodayData(type: string) {
+  if (cache[type] && Date.now() - cache[type].timestamp < CACHE_DURATION) {
+    console.log("Serving from cache for type:", type);
+    return cache[type].data;
+  }
+
   try {
     const buildUrl = `https://today.line.me/_next/data/v1/tw/v3/tab/${type}.json?tabs=${type}`;
     const req = await fetch(buildUrl, {
@@ -21,17 +33,42 @@ async function getLineTodayData(type: string) {
             req3.push(listing.id);
           }
         });
-      } else if (listings && listings.id) {
-        req3.push(listings.id);
       }
     });
+
+    cache[type] = {
+      data: req3,
+      timestamp: Date.now(),
+    };
+
     return req3;
   } catch (e) {
     console.log(e);
+    if (cache[type]) {
+      console.log("Serving expired cache due to error");
+      return cache[type].data;
+    }
+    return [];
   }
 }
 
+function filterUUIDs(ids: string[]): string[] {
+  const uuidPattern =
+    /^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
+  return ids.filter((id) => uuidPattern.test(id));
+}
+
 export default defineEventHandler(async (event) => {
-  const slug = getRouterParam(event, "slug");
-  return await getLineTodayData(slug);
+  const query = getQuery(event);
+  if (!query.query) {
+    return {
+      error: "NOT_A_QUERY",
+    };
+  }
+  const data = await getLineTodayData(String(query.query));
+  const validUUIDs = filterUUIDs(data || []);
+  return {
+    data: validUUIDs,
+    cached: !!cache[String(query.query)],
+  };
 });