From a9eeb29b9bd32309a99ff336ae1ed247f75d9029 Mon Sep 17 00:00:00 2001
From: official-techsupport
 <98240022+official-techsupport@users.noreply.github.com>
Date: Wed, 31 Aug 2022 00:19:53 +0300
Subject: [PATCH] fix showmore quadratic behavior (#343)

---
 files/helpers/regex.py    | 5 +++--
 files/helpers/sanitize.py | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/files/helpers/regex.py b/files/helpers/regex.py
index 1d85db1b8..c27329d6a 100644
--- a/files/helpers/regex.py
+++ b/files/helpers/regex.py
@@ -91,7 +91,8 @@ reddit_domain_regex = re.compile("(^|\s|\()https?:\/\/(reddit\.com|new\.reddit.c
 
 color_regex = re.compile("[a-z0-9]{6}", flags=re.A)
 
-showmore_regex = re.compile("(.{3000,40000}?</p>)(<p>.*)", flags=re.A)
+# lazy match on the {}?, only match if there is trailing text
+showmore_regex = re.compile("^(.{3000,40000}?</p>)(<p>.*)", flags=re.A)
 
 search_token_regex = re.compile('"([^"]*)"|(\S+)', flags=re.A)
 
@@ -145,4 +146,4 @@ def command_regex_matcher(match, upper=False):
 	if match.group(2) == 'roll':
 		color = tuple(choices(range(256), k=3))
 		result = f'<b style="color:rgb{color}">Your roll: {result}</b>'
-	return match.group(1) + result
\ No newline at end of file
+	return match.group(1) + result
diff --git a/files/helpers/sanitize.py b/files/helpers/sanitize.py
index d00e84749..da1a600b5 100644
--- a/files/helpers/sanitize.py
+++ b/files/helpers/sanitize.py
@@ -373,7 +373,7 @@ def sanitize(sanitized, edit=False, limit_pings=0, showmore=True):
 		sanitized = sanitized.replace('\n','')
 
 	if showmore and len(sanitized) > 5000:
-		sanitized = showmore_regex.sub(r'\1<p><button class="showmore" onclick="showmore()">SHOW MORE</button></p><d class="d-none">\2</d>', sanitized)
+		sanitized = showmore_regex.sub(r'\1<p><button class="showmore" onclick="showmore()">SHOW MORE</button></p><d class="d-none">\2</d>', sanitized, count=1)
 
 	return sanitized.strip()