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
  24 /**
  25  * Job to prune link tables for pages that were deleted
  26  *
  27  * Only DataUpdate classes should construct these jobs
  28  *
  29  * @ingroup JobQueue
  30  * @since 1.27
  31  */
  32 class DeleteLinksJob extends Job {
  33         function __construct( Title $title, array $params ) {
  34                 parent::__construct( 'deleteLinks', $title, $params );
  35                 $this->removeDuplicates = true;
  36         }
  37
  38         function run() {
  39                 if ( is_null( $this->title ) ) {
  40                         $this->setLastError( "deleteLinks: Invalid title" );
  41                         return false;
  42                 }
  43
  44                 $pageId = $this->params['pageId'];
  45
  46                 // Serialize links updates by page ID so they see each others' changes
  47                 $scopedLock = LinksUpdate::acquirePageLock( wfGetDB( DB_MASTER ), $pageId, 'job' );
  48
  49                 if ( WikiPage::newFromID( $pageId, WikiPage::READ_LATEST ) ) {
  50                         // The page was restored somehow or something went wrong
  51                         $this->setLastError( "deleteLinks: Page #$pageId exists" );
  52                         return false;
  53                 }
  54
  55                 $timestamp = isset( $this->params['timestamp'] ) ? $this->params['timestamp'] : null;
  56
  57                 $page = WikiPage::factory( $this->title ); // title when deleted
  58                 $update = new LinksDeletionUpdate( $page, $pageId, $timestamp );
  59                 DataUpdate::runUpdates( [ $update ] );
  60
  61                 return true;
  62         }
  63 }