includes/jobqueue/jobs/DeleteLinksJob.php

   1 <?php
   2 /**
   3  * Job to update link tables for pages
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup JobQueue
  22  */
  23 use \MediaWiki\MediaWikiServices;
  24
  25 /**
  26  * Job to prune link tables for pages that were deleted
  27  *
  28  * Only DataUpdate classes should construct these jobs
  29  *
  30  * @ingroup JobQueue
  31  * @since 1.27
  32  */
  33 class DeleteLinksJob extends Job {
  34         function __construct( Title $title, array $params ) {
  35                 parent::__construct( 'deleteLinks', $title, $params );
  36                 $this->removeDuplicates = true;
  37         }
  38
  39         function run() {
  40                 if ( is_null( $this->title ) ) {
  41                         $this->setLastError( "deleteLinks: Invalid title" );
  42                         return false;
  43                 }
  44
  45                 $pageId = $this->params['pageId'];
  46
  47                 // Serialize links updates by page ID so they see each others' changes
  48                 $scopedLock = LinksUpdate::acquirePageLock( wfGetDB( DB_MASTER ), $pageId, 'job' );
  49
  50                 if ( WikiPage::newFromID( $pageId, WikiPage::READ_LATEST ) ) {
  51                         // The page was restored somehow or something went wrong
  52                         $this->setLastError( "deleteLinks: Page #$pageId exists" );
  53                         return false;
  54                 }
  55
  56                 $factory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
  57                 $timestamp = isset( $this->params['timestamp'] ) ? $this->params['timestamp'] : null;
  58                 $page = WikiPage::factory( $this->title ); // title when deleted
  59
  60                 $update = new LinksDeletionUpdate( $page, $pageId, $timestamp );
  61                 $update->setTransactionTicket( $factory->getEmptyTransactionTicket( __METHOD__ ) );
  62                 $update->doUpdate();
  63
  64                 return true;
  65         }
  66 }