<?php
/**
 * We want to make this whole thing as seamless as possible to the
 * end-user. Unfortunately, we can't do _all_ of the work in the class
 * because A) included files are not in global scope, but in the scope 
 * of their caller, and B) MediaWiki has way too many globals. So instead
 * we'll kinda fake it, and do the requires() inline. <3 PHP
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @ingroup Maintenance
 */

require_once( "Maintenance.php" );


class DeleteSelfExternals extends Maintenance {
	public function __construct() {
		parent::__construct();
		$this->mDescription = 'Delete self-references to $wgServer from externallinks';
		$this->mBatchSize = 1000;
	}
	
	public function execute() {
		global $wgServer;
		$this->output( "Deleting self externals from $wgServer\n" );
		$db = wfGetDB(DB_MASTER);
		while (1) {
			wfWaitForSlaves( 2 );
			$db->commit();
			$q = $db->limitResult( "DELETE /* deleteSelfExternals */ FROM externallinks WHERE el_to" 
				. $db->buildLike( $wgServer . '/', $db->anyString() ), $this->mBatchSize );
			$this->output( "Deleting a batch\n" );
			$db->query($q);
			if (!$db->affectedRows()) exit(0);
		}
	}
}

$maintClass = "DeleteSelfExternals";
require_once( DO_MAINTENANCE );
