feat: generate latest xml

packages/app/src/pages/rss/latest.xml.ts

@@ -0,0 +1,50 @@
+import type { APIRoute } from 'astro';
+
+import rss from '@astrojs/rss';
+import { toDate } from 'date-fns-tz';
+
+import { fetchResources } from '../../fetch';
+
+export const get: APIRoute = async (context) => {
+  const { resources } = await fetchResources(1);
+
+  return rss({
+    title: 'Anime Garden 最新资源',
+    description: 'Anime Garden 最新资源',
+    site: context.site!.origin,
+    items: resources.map((r) => {
+      return {
+        title: r.title,
+        pubDate: toDate(r.createdAt, { timeZone: 'Asia/Shanghai' }),
+        link: toGardenURL(context.site!.origin, r.href),
+        enclosure: {
+          url: r.magnet,
+          length: r.size ? formatSize(r.size) : 1,
+          type: 'application/x-bittorrent'
+        }
+      };
+    })
+  });
+};
+
+function toGardenURL(origin: string, href: string) {
+  const id = href.split('/').at(-1)!;
+  return origin + '/resource/' + id;
+}
+
+function formatSize(size: string) {
+  const RES = [
+    [/^([0-9\.]+)B$/, 1],
+    [/^([0-9\.]+)KB$/, 1024],
+    [/^([0-9\.]+)MB$/, 1024 * 1024],
+    [/^([0-9\.]+)GB$/, 1024 * 1024 * 1024],
+    [/^([0-9\.]+)TB$/, 1024 * 1024 * 1024 * 1024]
+  ] as const;
+  for (const [RE, base] of RES) {
+    const match = RE.exec(size);
+    if (match) {
+      return Math.round(+match[1] * base);
+    }
+  }
+  return 0;
+}