From 313d2e4af1c97afea080e57f200136821591e9d6 Mon Sep 17 00:00:00 2001
From: Umherirrender <umherirrender_de.wp@web.de>
Date: Fri, 15 Dec 2017 19:01:43 +0100
Subject: [PATCH] Use extension registry to check for CheckUser to be installed

Class was renamed in I39c60b2d059d1cb2c1c0d3a4206232d961536697

Change-Id: I8ca79302b9bbd8999e49a134240420d5cd6117c1
---
 includes/LoginNotify.php | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/includes/LoginNotify.php b/includes/LoginNotify.php
index 956c629..b5e7d12 100644
--- a/includes/LoginNotify.php
+++ b/includes/LoginNotify.php
@@ -12,6 +12,7 @@ use BagOStuff;
 use CentralAuthUser;
 use Config;
 use EchoEvent;
+use ExtensionRegistry;
 use IBufferingStatsdDataFactory;
 use JobQueueGroup;
 use JobSpecification;
@@ -238,7 +239,7 @@ class LoginNotify implements LoggerAwareInterface {
 		Assert::parameter( $user->isLoggedIn(), '$user', 'User must be logged in' );
 
 		if ( !$this->config->get( 'LoginNotifyCheckKnownIPs' )
-			|| !class_exists( 'CheckUser' )
+			|| !$this->isCheckUserInstalled()
 		) {
 			// Checkuser checks disabled.
 			// Note: It's important this be USER_NOT_KNOWN and not USER_NO_INFO.
@@ -401,6 +402,14 @@ class LoginNotify implements LoggerAwareInterface {
 		return true;
 	}
 
+	/**
+	 * Whether CheckUser extension is installed
+	 * @return bool
+	 */
+	private function isCheckUserInstalled() {
+		return ExtensionRegistry::getInstance()->isLoaded( 'CheckUser' );
+	}
+
 	/**
 	 * Give the user a cookie saying that they've previously logged in from this computer.
 	 *