From 9b73990083fe67ac270e484eb8bad9b3b5a4fe14 Mon Sep 17 00:00:00 2001
From: soxa <6390896+Soxasora@users.noreply.github.com>
Date: Sat, 12 Apr 2025 21:20:01 +0200
Subject: [PATCH] Non-word boundary Regex on user Mentions (#2096)

* fix: non-word boundary regex on user mentions; show user when mentioned with a path

* allow only a single slash after the user
---
 lib/rehype-sn.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/lib/rehype-sn.js b/lib/rehype-sn.js
index 98a17dbd..bed7e8f4 100644
--- a/lib/rehype-sn.js
+++ b/lib/rehype-sn.js
@@ -6,7 +6,7 @@ import { toString } from 'mdast-util-to-string'
 const userGroup = '[\\w_]+'
 const subGroup = '[A-Za-z][\\w_]+'
 
-const mentionRegex = new RegExp('(?:^|\\s)@(' + userGroup + '(?:\\/' + userGroup + ')?)', 'gi')
+const mentionRegex = new RegExp('\\B@(' + userGroup + '(?:\\/' + userGroup + ')?)', 'gi')
 const subRegex = new RegExp('~(' + subGroup + '(?:\\/' + subGroup + ')?)', 'gi')
 const nostrIdRegex = /\b((npub1|nevent1|nprofile1|note1|naddr1)[02-9ac-hj-np-z]+)\b/g
 
@@ -116,8 +116,8 @@ export default function rehypeSN (options = {}) {
             }
 
             const [fullMatch, mentionMatch, subMatch] = match
-            const replacement = mentionMatch ? replaceMention(fullMatch, mentionMatch) : replaceSub(fullMatch, subMatch)
 
+            const replacement = mentionMatch ? replaceMention(fullMatch, mentionMatch) : replaceSub(fullMatch, subMatch)
             if (replacement) {
               newChildren.push(replacement)
             } else {
@@ -238,10 +238,11 @@ export default function rehypeSN (options = {}) {
   }
 
   function replaceMention (value, username) {
+    // split the name by / to allow user paths and still show the user
     return {
       type: 'element',
       tagName: 'mention',
-      properties: { href: '/' + username, name: username },
+      properties: { href: '/' + username, name: username.split('/')[0] },
       children: [{ type: 'text', value }]
     }
   }