Initial Push to GIT

backend/src/utils/linkPreview.js

@@ -0,0 +1,37 @@
+const fetch = require('node-fetch');
+
+async function getLinkPreview(url) {
+  try {
+    const controller = new AbortController();
+    const timeout = setTimeout(() => controller.abort(), 5000);
+    
+    const res = await fetch(url, { 
+      signal: controller.signal,
+      headers: { 'User-Agent': 'TeamChatBot/1.0' }
+    });
+    clearTimeout(timeout);
+
+    const html = await res.text();
+    
+    const getTag = (name) => {
+      const match = html.match(new RegExp(`<meta[^>]*property=["']${name}["'][^>]*content=["']([^"']+)["']`, 'i')) ||
+                    html.match(new RegExp(`<meta[^>]*content=["']([^"']+)["'][^>]*property=["']${name}["']`, 'i')) ||
+                    html.match(new RegExp(`<meta[^>]*name=["']${name}["'][^>]*content=["']([^"']+)["']`, 'i'));
+      return match?.[1] || '';
+    };
+
+    const titleMatch = html.match(/<title[^>]*>([^<]+)<\/title>/i);
+    
+    return {
+      url,
+      title: getTag('og:title') || titleMatch?.[1] || url,
+      description: getTag('og:description') || getTag('description') || '',
+      image: getTag('og:image') || '',
+      siteName: getTag('og:site_name') || new URL(url).hostname,
+    };
+  } catch (e) {
+    return null;
+  }
+}
+
+module.exports = { getLinkPreview };