From a56b74a95003b73604266a4172cb67961db28abd Mon Sep 17 00:00:00 2001
From: Victor Vasiliev <vasilievvv@users.mediawiki.org>
Date: Mon, 14 Jan 2008 18:44:29 +0000
Subject: [PATCH] * Add caching to the AJAX search

---
 RELEASE-NOTES              |  3 ++-
 includes/AjaxFunctions.php | 16 +++++++++++++---
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index 1657d6b934..6291317959 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -131,7 +131,8 @@ it from source control: http://www.mediawiki.org/wiki/Download_from_SVN
   edit, via the parameter 'bot'. (Default: '1')
 * (bug 12536) User should be able to get MediaWiki version from any page
 * (bug 12622) A JavaScript constant to declare whether api.php is available
- 
+* Add caching to the AJAX search
+
 
 === Bug fixes in 1.12 ===
 
diff --git a/includes/AjaxFunctions.php b/includes/AjaxFunctions.php
index b004cfc20f..d630461741 100644
--- a/includes/AjaxFunctions.php
+++ b/includes/AjaxFunctions.php
@@ -73,8 +73,10 @@ function code2utf($num){
    return '';
 }
 
+define( 'AJAX_SEARCH_VERSION', 1 );	//AJAX search cache version
+
 function wfSajaxSearch( $term ) {
-	global $wgContLang, $wgOut, $wgUser, $wgCapitalLinks;
+	global $wgContLang, $wgOut, $wgUser, $wgCapitalLinks, $wgMemc;
 	$limit = 16;
 	$sk = $wgUser->getSkin();
 
@@ -84,6 +86,14 @@ function wfSajaxSearch( $term ) {
 		$term = $wgContLang->ucfirst( $term ); 
 	$term_title = Title::newFromText( $term );
 
+	$memckey = wfMemcKey( 'ajaxsearch', md5( $term_title->getFullText() ) );
+	$cached = $wgMemc->get($memckey);
+	if( is_array( $cached ) && $cached['version'] == AJAX_SEARCH_VERSION ) {
+		$response = new AjaxResponse( $cached['html'] );
+		$response->setCacheDuration( 30*60 );
+		return $response;
+	}
+
 	$r = $more = '';
 	$canSearch = true;
 	if( $term_title && $term_title->getNamespace() != NS_SPECIAL ) {
@@ -147,10 +157,10 @@ function wfSajaxSearch( $term ) {
 			. '<ul>' .$r .'</ul>' . $more;
 	}
 
-	$response = new AjaxResponse( $html );
+	$wgMemc->set( $memckey, array( 'version' => AJAX_SEARCH_VERSION, 'html' => $html ), 30 * 60 );
 
+	$response = new AjaxResponse( $html );
 	$response->setCacheDuration( 30*60 );
-
 	return $response;
 }
 
-- 
2.20.1