MediaWiki 1.15.1

[autoinstallsdev/mediawiki.git] / includes / filerepo / LocalRepo.php

diff --git a/includes/filerepo/LocalRepo.php b/includes/filerepo/LocalRepo.php
index 1ec1b9a614bd8714fcec2c6757288320fe5f2a8f..c679dd98cd17aa9061edeadf3a03180f90de6f7c 100644 (file)
--- a/includes/filerepo/LocalRepo.php
+++ b/includes/filerepo/LocalRepo.php
@@ -10,10 +10,6 @@ class LocalRepo extends FSRepo {
        var $fileFromRowFactory = array( 'LocalFile', 'newFromRow' );
        var $oldFileFromRowFactory = array( 'OldLocalFile', 'newFromRow' );
 
-       function getMemcKey( $key ) {
-               return wfWikiID( $this->getSlaveDB() ) . ":{$key}";
-       }
-
        function newFileFromRow( $row ) {
                if ( isset( $row->img_name ) ) {
                        return call_user_func( $this->fileFromRowFactory, $row, $this );
@@ -71,6 +67,51 @@ class LocalRepo extends FSRepo {
                }
                return $status;
        }
+       
+       /**
+        * Checks if there is a redirect named as $title
+        *
+        * @param Title $title Title of image
+        */
+       function checkRedirect( $title ) {
+               global $wgMemc;
+
+               if( is_string( $title ) ) {
+                       $title = Title::newFromTitle( $title );
+               }
+               if( $title instanceof Title && $title->getNamespace() == NS_MEDIA ) {
+                       $title = Title::makeTitle( NS_FILE, $title->getText() );
+               }
+
+               $memcKey = $this->getMemcKey( "image_redirect:" . md5( $title->getPrefixedDBkey() ) );
+               $cachedValue = $wgMemc->get( $memcKey );
+               if( $cachedValue ) {
+                       return Title::newFromDbKey( $cachedValue );
+               } elseif( $cachedValue == ' ' ) { # FIXME: ugly hack, but BagOStuff caching seems to be weird and return false if !cachedValue, not only if it doesn't exist
+                       return false;
+               }
+
+               $id = $this->getArticleID( $title );
+               if( !$id ) {
+                       $wgMemc->set( $memcKey, " ", 9000 );
+                       return false;
+               }
+               $dbr = $this->getSlaveDB();
+               $row = $dbr->selectRow(
+                       'redirect',
+                       array( 'rd_title', 'rd_namespace' ),
+                       array( 'rd_from' => $id ),
+                       __METHOD__
+               );
+
+               if( $row ) $targetTitle = Title::makeTitle( $row->rd_namespace, $row->rd_title );
+               $wgMemc->set( $memcKey, ($row ? $targetTitle->getPrefixedDBkey() : " "), 9000 );
+               if( !$row ) {
+                       return false;
+               }
+               return $targetTitle;
+       }
+
 
        /**
         * Function link Title::getArticleID().