feat: add RSS feed route for blog articles

app/rss.xml/route.ts

@@ -0,0 +1,86 @@
+import { getAllBlogArticles } from "@/data/blog";
+
+const SITE_URL = process.env.NEXT_PUBLIC_SITE_URL || "https://poyrazavsever.com";
+const FEED_PATH = "/rss.xml";
+const FEED_TITLE = "Poyraz Avsever Blog";
+const FEED_DESCRIPTION =
+  "Poyraz Avsever'in blog yazilari, yazilim notlari ve teknik icerikleri.";
+
+function toAbsoluteUrl(pathOrUrl: string) {
+  try {
+    return new URL(pathOrUrl).toString();
+  } catch {
+    return new URL(pathOrUrl, SITE_URL).toString();
+  }
+}
+
+function escapeXml(value: string) {
+  return value
+    .replace(/&/g, "&")
+    .replace(/</g, "&lt;")
+    .replace(/>/g, "&gt;")
+    .replace(/"/g, "&quot;")
+    .replace(/'/g, "&apos;");
+}
+
+function toRssDate(value: string | undefined) {
+  if (!value) return new Date().toUTCString();
+  const timestamp = Date.parse(value);
+  if (Number.isNaN(timestamp)) return new Date().toUTCString();
+  return new Date(timestamp).toUTCString();
+}
+
+export async function GET() {
+  const articles = await getAllBlogArticles();
+  const feedUrl = toAbsoluteUrl(FEED_PATH);
+  const siteUrl = toAbsoluteUrl("/");
+
+  const lastBuildDate = toRssDate(articles[0]?.date);
+
+  const items = articles
+    .map((article) => {
+      const link = toAbsoluteUrl(article.href);
+      const pubDate = toRssDate(article.date);
+      const title = escapeXml(article.title);
+      const description = escapeXml(article.excerpt || article.title);
+      const category = escapeXml(article.category || "General");
+      const author = escapeXml(article.author || "Poyraz Avsever");
+
+      return [
+        "    <item>",
+        `      <title>${title}</title>`,
+        `      <link>${link}</link>`,
+        `      <guid isPermaLink="true">${link}</guid>`,
+        `      <description>${description}</description>`,
+        `      <category>${category}</category>`,
+        `      <author>hello@poyrazavsever.com (${author})</author>`,
+        `      <pubDate>${pubDate}</pubDate>`,
+        "    </item>",
+      ].join("\n");
+    })
+    .join("\n");
+
+  const xml = [
+    '<?xml version="1.0" encoding="UTF-8"?>',
+    '<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">',
+    "  <channel>",
+    `    <title>${escapeXml(FEED_TITLE)}</title>`,
+    `    <link>${siteUrl}</link>`,
+    `    <description>${escapeXml(FEED_DESCRIPTION)}</description>`,
+    "    <language>tr-TR</language>",
+    `    <atom:link href="${feedUrl}" rel="self" type="application/rss+xml" />`,
+    `    <lastBuildDate>${lastBuildDate}</lastBuildDate>`,
+    "    <generator>Next.js RSS Route</generator>",
+    items,
+    "  </channel>",
+    "</rss>",
+    "",
+  ].join("\n");
+
+  return new Response(xml, {
+    headers: {
+      "Content-Type": "application/rss+xml; charset=utf-8",
+      "Cache-Control": "public, s-maxage=3600, stale-while-revalidate=86400",
+    },
+  });
+}