From 519f15c7700222357952e8cab41bbe960730c7fd Mon Sep 17 00:00:00 2001
From: Alexander Ebert <ebert@woltlab.com>
Date: Mon, 21 Nov 2016 18:12:28 +0100
Subject: [PATCH] Added work-around for broken controllers

---
 .../builder/RoutingCacheBuilder.class.php     | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/wcfsetup/install/files/lib/system/cache/builder/RoutingCacheBuilder.class.php b/wcfsetup/install/files/lib/system/cache/builder/RoutingCacheBuilder.class.php
index b13416be82..360f5d9859 100644
--- a/wcfsetup/install/files/lib/system/cache/builder/RoutingCacheBuilder.class.php
+++ b/wcfsetup/install/files/lib/system/cache/builder/RoutingCacheBuilder.class.php
@@ -17,6 +17,16 @@ use wcf\util\FileUtil;
  * @since	3.0
  */
 class RoutingCacheBuilder extends AbstractCacheBuilder {
+	/**
+	 * list of controllers violating the url schema, but are
+	 * supported for legacy reasons
+	 * @var array
+	 */
+	protected $brokenControllers = [
+		'lookup' => [],
+		'reverse' => []
+	];
+	
 	/**
 	 * @inheritDoc
 	 */
@@ -73,12 +83,37 @@ class RoutingCacheBuilder extends AbstractCacheBuilder {
 							// drop the last part containing `Action` or `Page`
 							array_pop($parts);
 							
+							// fix for invalid pages that would cause single character fragments
+							$sanitizedParts = [];
+							$tmp = '';
+							$isBrokenController = false;
+							foreach ($parts as $part) {
+								if (strlen($part) === 1) {
+									$isBrokenController = true;
+									$tmp .= $part;
+									continue;
+								}
+								
+								$sanitizedParts[] = $tmp . $part;
+								$tmp = '';
+							}
+							if ($tmp) $sanitizedParts[] = $tmp;
+							$parts = $sanitizedParts;
+							
 							$ciController = implode('-', array_map('strtolower', $parts));
 							$className = $abbreviation . '\\' . ($libDirectory === 'lib/acp' ? 'acp\\' : '') . $pageType . '\\' . $filename;
 							
 							if (!isset($data['lookup'][$abbreviation])) $data['lookup'][$abbreviation] = ['acp' => [], 'frontend' => []];
 							$data['lookup'][$abbreviation][$libDirectory === 'lib' ? 'frontend' : 'acp'][$ciController] = $className;
 							$data['reverse'][$filename] = $ciController;
+							
+							if ($isBrokenController) {
+								if (!isset($this->brokenControllers['lookup'][$abbreviation])) $this->brokenControllers['lookup'][$abbreviation] = [];
+								$this->brokenControllers['lookup'][$abbreviation][$ciController] = $className;
+								
+								if (!isset($this->brokenControllers['reverse'][$abbreviation])) $this->brokenControllers['reverse'][$abbreviation] = [];
+								$this->brokenControllers['reverse'][$abbreviation][preg_replace('~(?:Page|Form|Action)$~', '', $filename)] = $ciController;
+							}
 						}
 					}
 				}
@@ -148,6 +183,21 @@ class RoutingCacheBuilder extends AbstractCacheBuilder {
 			}
 		}
 		
+		// masquerade broken controllers as custom urls
+		foreach ($this->brokenControllers as $type => $brokenControllers) {
+			foreach ($brokenControllers as $application => $controllers) {
+				foreach ($controllers as $key => $value) {
+					if (!isset($data[$type][$application])) {
+						$data[$type][$application] = [];
+					}
+					
+					if (!isset($data[$type][$application][$key])) {
+						$data[$type][$application][$key] = $value;
+					}
+				}
+			}
+		}
+		
 		return $data;
 	}
 	
-- 
2.20.1