feat: cozify to prefetch links and open in cozy

src/components/Post.astro

@@ -1,6 +1,6 @@
 ---
 import { ArticleData } from "@extractus/article-extractor";
-import clean from '../utils/sanitizer';
+import { cozify } from "../utils/sanitizer"
 export interface Props {
   article: ArticleData | null;
 }
@@ -14,7 +14,7 @@ article ??= error;
 const datePublished =
   article?.published && new Date(article.published).toDateString();
 
-const cleanContent = clean(article.content ?? '')
+const cleanContent = await cozify(article.content ?? '', Astro.url.origin)
 ---
 
 <!-- 

src/utils/sanitizer.ts

@@ -1,11 +1,25 @@
-import { transform } from 'ultrahtml'
+import { parse, render, transform, walkSync } from 'ultrahtml'
 import sanitize from 'ultrahtml/transformers/sanitize'
 
-export default function clean(html: string) {
+export async function cozify(html: string, baseUrl: string): Promise<string> {
 
-    return transform(html, [
+    // remove target="_blank" from links
+    const ast = parse(html)
+    walkSync(ast, (node) => {
+        if (node.name === 'a') {
+            node.attributes.href = `${baseUrl}?url=${node.attributes.href}`
+            node.attributes.prefetch = true
+        }
+    })
+
+    const newHtml = await render(ast);
+
+    return transform(newHtml, [
         sanitize({
             dropElements: ['script'],
+            dropAttributes: {
+                target: ['a']
+            }
         })
     ])
 }