Update sitemaps for albums

astro/src/pages/sitemap/albums.xml.ts

@@ -1,3 +1,4 @@
+import { getAllAlbums } from "@/content/photos/albums";
 import { getSettings } from "@/content/settings/settings";
 import type { APIRoute } from "astro";
 import minifyXML from "minify-xml";
@@ -5,16 +6,43 @@ import minifyXML from "minify-xml";
 export const GET = (async () => {
     const settings = await getSettings();
 
-    const albumCount = 250;
+    if (!settings.photo.enabled) {
+        return new Response(null, {
+            status: 204,
+            statusText: "Not Found"
+        });
+    }
+
+    const albums = await getAllAlbums(settings);
+    const albumCount = albums.length;
     const perPage = settings.sitemap.perPage;
     const pages = Math.ceil(albumCount / perPage);
 
     let sitemaps: SitemapIndex[] = [];
 
     for (let i = 0; i < pages; i++) {
+        const selectedProjects = albums.slice(
+            ((Number(i + 1) - 1) * settings.sitemap.perPage),
+            Number(i + 1) * settings.sitemap.perPage - 1
+        );
+
+        let dates = [
+            settings.sitemap.lastModified,
+            settings.photo.lastModified,
+            settings.website.lastModified
+        ];
+
+        selectedProjects.forEach((project) => {
+            dates.push(project.lastModified);
+        });
+
+        const lastModified = dates.sort((a: Date, b: Date) => {
+            return b.getTime() - a.getTime();
+        });
+
         sitemaps.push({
             url: `/sitemap/albums-${i + 1}.xml`,
-            lastModified: new Date()
+            lastModified: lastModified[0]
         });
     }