From 8940af9d9bf5c9deb27840f0f7e76ff043ca2263 Mon Sep 17 00:00:00 2001
From: Alexander Ebert <ebert@woltlab.com>
Date: Thu, 22 Dec 2016 17:20:33 +0100
Subject: [PATCH] Fixed handling of broken ACP controllers

---
 .../system/request/ControllerMap.class.php    | 24 ++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/wcfsetup/install/files/lib/system/request/ControllerMap.class.php b/wcfsetup/install/files/lib/system/request/ControllerMap.class.php
index 068d03b930..ac436f1eec 100644
--- a/wcfsetup/install/files/lib/system/request/ControllerMap.class.php
+++ b/wcfsetup/install/files/lib/system/request/ControllerMap.class.php
@@ -363,7 +363,29 @@ class ControllerMap extends SingletonFactory {
 	 * @return	string		url representation, e.g. 'board-list'
 	 */
 	public static function transformController($controller) {
-		$parts = preg_split('~([A-Z][a-z0-9]+)~', $controller, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
+		// work-around for broken controllers that violate the strict naming rules
+		if (preg_match('~[A-Z]{2,}~', $controller)) {
+			$parts = preg_split('~([A-Z][a-z0-9]+)~', $controller, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
+			
+			// fix for invalid pages that would cause single character fragments
+			$sanitizedParts = [];
+			$tmp = '';
+			foreach ($parts as $part) {
+				if (strlen($part) === 1) {
+					$tmp .= $part;
+					continue;
+				}
+				
+				$sanitizedParts[] = $tmp . $part;
+				$tmp = '';
+			}
+			if ($tmp) $sanitizedParts[] = $tmp;
+			$parts = $sanitizedParts;
+		}
+		else {
+			$parts = preg_split('~([A-Z][a-z0-9]+)~', $controller, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
+		}
+		
 		$parts = array_map('strtolower', $parts);
 		
 		return implode('-', $parts);
-- 
2.20.1