Add sitemap route

app.js

@@ -5,6 +5,7 @@ const fs = require('fs');
 const { marked } = require('marked');
 const nodemailer = require('nodemailer');
 const hljs = require('highlight.js');
+const { format } = require('date-fns'); // To format dates in a proper XML format
 
 const app = express();
 
@@ -202,6 +203,58 @@ app.get('/blog/:slug', (req, res) => {
     }
 });
 
+
+// Sitemap Route
+app.get('/sitemap.xml', (req, res) => {
+    const hostname = req.headers.host || 'http://localhost'; // Ensure this is your site URL in production
+    const blogFiles = fs.readdirSync(path.join(__dirname, 'markdown')).filter(file => file.endsWith('.md'));
+
+    // Static URLs (e.g., homepage, about, contact)
+    const staticUrls = [
+        { url: '/', changefreq: 'weekly', priority: 1.0 },
+        { url: '/about', changefreq: 'monthly', priority: 0.8 },
+        { url: '/contact', changefreq: 'monthly', priority: 0.8 }
+    ];
+
+    // Dynamic URLs (e.g., blog posts)
+    const blogUrls = blogFiles.map(file => {
+        const title = file.replace('.md', '');
+        const slug = titleToSlug(title);
+
+        // Get the last modified date of the markdown file
+        const stats = fs.statSync(path.join(__dirname, 'markdown', file));
+        const lastModifiedDate = format(new Date(stats.mtime), 'yyyy-MM-dd');
+
+        return {
+            url: `/blog/${slug}`,
+            lastmod: lastModifiedDate,
+            changefreq: 'monthly',
+            priority: 0.9
+        };
+    });
+
+    // Combine static and dynamic URLs
+    const urls = [...staticUrls, ...blogUrls];
+
+    // Generate the XML for the sitemap
+    let sitemap = `<?xml version="1.0" encoding="UTF-8"?>\n<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">\n`;
+    urls.forEach(({ url, lastmod, changefreq, priority }) => {
+        sitemap += `  <url>\n`;
+        sitemap += `    <loc>${hostname}${url}</loc>\n`;
+        if (lastmod) {
+            sitemap += `    <lastmod>${lastmod}</lastmod>\n`;
+        }
+        sitemap += `    <changefreq>${changefreq}</changefreq>\n`;
+        sitemap += `    <priority>${priority}</priority>\n`;
+        sitemap += `  </url>\n`;
+    });
+    sitemap += `</urlset>`;
+
+    // Set the content type to XML and send the response
+    res.header('Content-Type', 'application/xml');
+    res.send(sitemap);
+});
+
 // Global 404 handler for any other unmatched routes
 app.use((req, res) => {
     res.redirect('/'); // Redirect to the home page for any 404 error

package.json

@@ -12,6 +12,7 @@
   "dependencies": {
     "body-parser": "^1.20.3",
     "bootstrap": "^5.3.3",
+    "date-fns": "^4.0.0",
     "dotenv": "^16.4.5",
     "ejs": "^3.1.10",
     "express": "^4.21.0",