From c79685b0bc9686b41abcf295fdbe8f06d9e1771c Mon Sep 17 00:00:00 2001
From: Harrison Healey <harrisonmhealey@gmail.com>
Date: Wed, 3 Aug 2016 19:28:38 -0400
Subject: PLT-3534 Changed special handling of internal links to only occur for
 permalinks and links to channels (#3731)

---
 webapp/utils/markdown.jsx        | 6 +++---
 webapp/utils/text_formatting.jsx | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/webapp/utils/markdown.jsx b/webapp/utils/markdown.jsx
index e291ce546..028e667fd 100644
--- a/webapp/utils/markdown.jsx
+++ b/webapp/utils/markdown.jsx
@@ -151,9 +151,9 @@ class MattermostMarkdownRenderer extends marked.Renderer {
 
         let output = '<a class="theme markdown__link" href="' + outHref + '" rel="noreferrer"';
 
-        // special case for links that are inside the app
-        if (outHref.startsWith(global.location.origin)) {
-            output += ' data-link="' + outHref.substring(global.location.origin.length) + '"';
+        // special case for channel links and permalinks that are inside the app
+        if (new RegExp('^' + TextFormatting.escapeRegex(global.mm_config.SiteURL) + '\\/[^\\/]+\\/(pl|channels)\\/').test(outHref)) {
+            output += ' data-link="' + outHref.substring(global.mm_config.SiteURL.length) + '"';
         } else {
             output += ' target="_blank"';
         }
diff --git a/webapp/utils/text_formatting.jsx b/webapp/utils/text_formatting.jsx
index b304fa75a..655b4180e 100644
--- a/webapp/utils/text_formatting.jsx
+++ b/webapp/utils/text_formatting.jsx
@@ -199,7 +199,7 @@ function autolinkAtMentions(text, tokens) {
     return output;
 }
 
-function escapeRegex(text) {
+export function escapeRegex(text) {
     return text.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
 }
 
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