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<?php
/*
* Created on May 13, 2007
*
* API for MediaWiki 1.8+
*
* Copyright (C) 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
*
* 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.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
* http://www.gnu.org/copyleft/gpl.html
*/
if ( !defined( 'MEDIAWIKI' ) ) {
// Eclipse helper - will be ignored in production
require_once ( "ApiQueryBase.php" );
}
/**
* This query adds an <images> subelement to all pages with the list of images embedded into those pages.
*
* @ingroup API
*/
class ApiQueryImages extends ApiQueryGeneratorBase {
public function __construct( $query, $moduleName ) {
parent :: __construct( $query, $moduleName, 'im' );
}
public function execute() {
$this->run();
}
public function executeGenerator( $resultPageSet ) {
$this->run( $resultPageSet );
}
private function run( $resultPageSet = null ) {
if ( $this->getPageSet()->getGoodTitleCount() == 0 )
return; // nothing to do
$params = $this->extractRequestParams();
$this->addFields( array (
'il_from',
'il_to'
) );
$this->addTables( 'imagelinks' );
$this->addWhereFld( 'il_from', array_keys( $this->getPageSet()->getGoodTitles() ) );
if ( !is_null( $params['continue'] ) ) {
$cont = explode( '|', $params['continue'] );
if ( count( $cont ) != 2 )
$this->dieUsage( "Invalid continue param. You should pass the " .
"original value returned by the previous query", "_badcontinue" );
$ilfrom = intval( $cont[0] );
$ilto = $this->getDB()->strencode( $this->titleToKey( $cont[1] ) );
$this->addWhere( "il_from > $ilfrom OR " .
"(il_from = $ilfrom AND " .
"il_to >= '$ilto')" );
}
// Don't order by il_from if it's constant in the WHERE clause
if ( count( $this->getPageSet()->getGoodTitles() ) == 1 )
$this->addOption( 'ORDER BY', 'il_to' );
else
$this->addOption( 'ORDER BY', 'il_from, il_to' );
$this->addOption( 'LIMIT', $params['limit'] + 1 );
$db = $this->getDB();
$res = $this->select( __METHOD__ );
if ( is_null( $resultPageSet ) ) {
$count = 0;
while ( $row = $db->fetchObject( $res ) ) {
if ( ++$count > $params['limit'] ) {
// We've reached the one extra which shows that
// there are additional pages to be had. Stop here...
$this->setContinueEnumParameter( 'continue', $row->il_from .
'|' . $this->keyToTitle( $row->il_to ) );
break;
}
$vals = array();
ApiQueryBase :: addTitleInfo( $vals, Title :: makeTitle( NS_FILE, $row->il_to ) );
$fit = $this->addPageSubItem( $row->il_from, $vals );
if ( !$fit )
{
$this->setContinueEnumParameter( 'continue', $row->il_from .
'|' . $this->keyToTitle( $row->il_to ) );
break;
}
}
} else {
$titles = array();
$count = 0;
while ( $row = $db->fetchObject( $res ) ) {
if ( ++$count > $params['limit'] ) {
// We've reached the one extra which shows that
// there are additional pages to be had. Stop here...
$this->setContinueEnumParameter( 'continue', $row->il_from .
'|' . $this->keyToTitle( $row->il_to ) );
break;
}
$titles[] = Title :: makeTitle( NS_FILE, $row->il_to );
}
$resultPageSet->populateFromTitles( $titles );
}
$db->freeResult( $res );
}
public function getCacheMode( $params ) {
return 'public';
}
public function getAllowedParams() {
return array(
'limit' => array(
ApiBase :: PARAM_DFLT => 10,
ApiBase :: PARAM_TYPE => 'limit',
ApiBase :: PARAM_MIN => 1,
ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
),
'continue' => null,
);
}
public function getParamDescription () {
return array(
'limit' => 'How many images to return',
'continue' => 'When more results are available, use this to continue',
);
}
public function getDescription() {
return 'Returns all images contained on the given page(s)';
}
public function getPossibleErrors() {
return array_merge( parent::getPossibleErrors(), array(
array( 'code' => '_badcontinue', 'info' => 'Invalid continue param. You should pass the original value returned by the previous query' ),
) );
}
protected function getExamples() {
return array (
"Get a list of images used in the [[Main Page]]:",
" api.php?action=query&prop=images&titles=Main%20Page",
"Get information about all images used in the [[Main Page]]:",
" api.php?action=query&generator=images&titles=Main%20Page&prop=info"
);
}
public function getVersion() {
return __CLASS__ . ': $Id: ApiQueryImages.php 69932 2010-07-26 08:03:21Z tstarling $';
}
}
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