Add caching into the code to make it faster.

server/api/news/get/lt/[slug].ts

@@ -1,6 +1,31 @@
 import lineToday from "~/server/scrape/line_today";
 import sql from "~/server/components/postgres";
-import saveDataToSql from "~/server/scrape/save_scrape_data";
+
+interface CacheItems {
+  title: string;
+  paragraph: string[];
+  origin: string;
+  author: string;
+  images: string[];
+  cached: boolean;
+  articleId: string;
+  timestamp: number;
+}
+
+const CACHE_DURATION = 1000 * 60 * 60;
+
+const cache: Record<string, CacheItems> = {};
+
+function cleanupCache() {
+  const now = Date.now();
+  Object.keys(cache).forEach((key) => {
+    if (now - cache[key].timestamp > CACHE_DURATION) {
+      delete cache[key];
+    }
+  });
+}
+
+setInterval(cleanupCache, CACHE_DURATION);
 
 function cleanUpSlug(orgslug: string) {
   let slug = orgslug.trim();
@@ -14,16 +39,36 @@ function cleanUpSlug(orgslug: string) {
 export default defineEventHandler(async (event) => {
   const slug = getRouterParam(event, "slug");
   const cleanSlug = cleanUpSlug(slug);
-  /*const result = await sql`
-       select * from articles_lt
-       where slug = ${cleanSlug}
-       `;*/
-  if (false) {
-    //return result;
-  } else {
+  if (
+    cache[cleanSlug] &&
+    Date.now() - cache[cleanSlug].timestamp < CACHE_DURATION
+  ) {
+    return {
+      ...cache[cleanSlug],
+      cached: true,
+    };
+  }
+
+  try {
     const data = await lineToday(cleanSlug);
-    //saveDataToSql(data, slug);
-    console.log(data);
-    return data;
+    cache[cleanSlug] = {
+      ...data,
+      timestamp: Date.now(),
+    };
+    return {
+      ...data,
+      cached: false,
+    };
+  } catch (e) {
+    if (cache[cleanSlug]) {
+      return {
+        ...cache[cleanSlug],
+        cached: true,
+      };
+    }
+    throw createError({
+      statusCode: 500,
+      message: "SERVER_SIDE_ERROR",
+    });
   }
 });