From 1c9843333397b6540924633c09417e3e04181fab Mon Sep 17 00:00:00 2001
From: Lim Chee Aun <cheeaun@gmail.com>
Date: Fri, 23 Dec 2022 00:40:25 +0800
Subject: [PATCH] Linkify twitter usernames

This is due to some folks cross-posting from Twitter.
---
 src/utils/enhance-content.js | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/utils/enhance-content.js b/src/utils/enhance-content.js
index 4783f3c3..417c03c2 100644
--- a/src/utils/enhance-content.js
+++ b/src/utils/enhance-content.js
@@ -57,6 +57,23 @@ function enhanceContent(content, opts = {}) {
     block.replaceWith(pre);
   });
 
+  // TWITTER USERNAMES
+  // =================
+  // Convert @username@twitter.com to <a href="https://twitter.com/username">@username@twitter.com</a>
+  textNodes = extractTextNodes(dom);
+  textNodes.forEach((node) => {
+    let html = node.nodeValue.replace(/</g, '&lt;').replace(/>/g, '&gt;');
+    if (/@[a-zA-Z0-9_]+@twitter\.com/g.test(html)) {
+      html = html.replaceAll(
+        /(@([a-zA-Z0-9_]+)@twitter\.com)/g,
+        '<a href="https://twitter.com/$2" rel="nofollow noopener noreferrer" target="_blank">$1</a>',
+      );
+    }
+    fauxDiv.innerHTML = html;
+    const nodes = Array.from(fauxDiv.childNodes);
+    node.replaceWith(...nodes);
+  });
+
   if (postEnhanceDOM) {
     postEnhanceDOM(dom); // mutate dom
   }