From a3d486408bf1ce30aa88223a75e2d7fa2da6bc0f Mon Sep 17 00:00:00 2001
From: =?utf8?q?Tim=20D=C3=BCsterhus?= <duesterhus@woltlab.com>
Date: Fri, 28 Aug 2015 19:17:04 +0200
Subject: [PATCH] Guard against stupid forum software containing duplicate
 subscriptions

---
 .../importer/AbstractWatchedObjectImporter.class.php | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/wcfsetup/install/files/lib/system/importer/AbstractWatchedObjectImporter.class.php b/wcfsetup/install/files/lib/system/importer/AbstractWatchedObjectImporter.class.php
index 2b1ce6f44c..ff1c719aa7 100644
--- a/wcfsetup/install/files/lib/system/importer/AbstractWatchedObjectImporter.class.php
+++ b/wcfsetup/install/files/lib/system/importer/AbstractWatchedObjectImporter.class.php
@@ -1,6 +1,7 @@
 <?php
 namespace wcf\system\importer;
 use wcf\data\user\object\watch\UserObjectWatchEditor;
+use wcf\system\database\DatabaseException
 
 /**
  * Imports watched objects.
@@ -31,7 +32,16 @@ class AbstractWatchedObjectImporter extends AbstractImporter {
 		$data['userID'] = ImportHandler::getInstance()->getNewID('com.woltlab.wcf.user', $data['userID']);
 		if (!$data['userID']) return 0;
 		
-		$watch = UserObjectWatchEditor::create(array_merge($data, array('objectTypeID' => $this->objectTypeID)));
+		try {
+			$watch = UserObjectWatchEditor::create(array_merge($data, array('objectTypeID' => $this->objectTypeID)));
+		}
+		catch (DatabaseException $e) {
+			// 23000 = INTEGRITY CONSTRAINT VIOLATION a.k.a. duplicate key
+			if ($e->getCode() != 23000) {
+				throw $e;
+			}
+		}
+		
 		return $watch->watchID;
 	}
 }
-- 
2.20.1