From bbd29892d5552842d9e22b82f1f955c26cff0b0d Mon Sep 17 00:00:00 2001
From: "Mr. E23" <e23@users.mediawiki.org>
Date: Fri, 28 Nov 2003 08:03:49 +0000
Subject: [PATCH] Purging relevant linkscc entries on page undelete.

---
 includes/SpecialUndelete.php | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/includes/SpecialUndelete.php b/includes/SpecialUndelete.php
index 6c8a24b254..3fda4d3017 100644
--- a/includes/SpecialUndelete.php
+++ b/includes/SpecialUndelete.php
@@ -158,7 +158,14 @@ function wfSpecialUndelete( $par )
 
 			$u = new LinksUpdate( $newid, $to->getPrefixedDBkey() );
 			array_push( $wgDeferredUpdateList, $u );
-
+			
+			global $wgEnablePersistentLC;
+			if ( $wgEnablePersistentLC ) {
+				// Purge related entries in links cache on undelete, to heal broken links
+				$ptitle = wfStrencode( $to->getPrefixedDBkey() );
+				wfQuery("DELETE linkscc FROM linkscc,brokenlinks ".
+					"WHERE lcc_pageid=bl_from AND bl_to='{$ptitle}'", DB_WRITE);
+			}
 			#TODO: SearchUpdate, etc.
 		}
 
-- 
2.20.1