feat: add RSS feed generation and content management features

src/pages/rss.xml.ts

@@ -1,33 +1,62 @@
 import type { APIContext } from 'astro'
+import type { CollectionEntry } from 'astro:content'
 import themeConfig from '@/config'
 import rss from '@astrojs/rss'
 import { getCollection } from 'astro:content'
 import MarkdownIt from 'markdown-it'
 import sanitizeHtml from 'sanitize-html'
-import
 
 const parser = new MarkdownIt()
 const { title, description, url } = themeConfig.site
 const { language } = themeConfig.global
+const followConfig = themeConfig.seo?.follow
 
+// Extract first 100 chars from content as description
+function getExcerpt(content: string): string {
+  const plainText = sanitizeHtml(
+    parser.render(content),
+    {
+      allowedTags: [],
+      allowedAttributes: {},
+    },
+  )
+
+  return `${plainText.slice(0, 100).trim()}...`
+}
+
+// Generate RSS feed
 export async function GET(_context: APIContext) {
-  const posts = await getCollection('blog', ({ data }) => {
-    return !data.draft // 只包含非草稿文章
-  })
+  const posts = await getCollection(
+    'posts',
+    ({ data }: { data: CollectionEntry<'posts'>['data'] }) => !data.draft,
+  )
 
   return rss({
     title,
     description,
     site: url,
-    items: posts.map(post => ({
+    stylesheet: '/rss/styles.xsl',
+    items: posts.map((post: CollectionEntry<'posts'>) => ({
       title: post.data.title,
-      pubDate: post.data.published, // 使用 published 而不是 pubDate
-      description: post.data.description,
+      pubDate: post.data.published,
+      description: post.data.description || getExcerpt(post.body),
       link: `/posts/${post.slug}/`,
-      content: sanitizeHtml(parser.render(post.body), {
-        allowedTags: sanitizeHtml.defaults.allowedTags.concat(['img']),
-      }),
+      content: sanitizeHtml(
+        parser.render(post.body),
+        {
+          allowedTags: sanitizeHtml.defaults.allowedTags.concat(['img']),
+        },
+      ),
     })),
-    customData: `<language>${language}</language>`,
+    customData: `
+      <language>${language}</language>
+      ${followConfig?.feedID && followConfig?.userID
+          ? `<follow_challenge>
+            <feedId>${followConfig.feedID}</feedId>
+            <userId>${followConfig.userID}</userId>
+          </follow_challenge>`
+          : ''
+      }
+    `.trim(),
   })
 }