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<?php
/**
*
*
* Created on May 13, 2007
*
* Copyright © 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
/**
* 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( ApiQuery $query, $moduleName ) {
parent::__construct( $query, $moduleName, 'im' );
}
public function execute() {
$this->run();
}
public function executeGenerator( $resultPageSet ) {
$this->run( $resultPageSet );
}
/**
* @param ApiPageSet $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'] );
$this->dieContinueUsageIf( count( $cont ) != 2 );
$op = $params['dir'] == 'descending' ? '<' : '>';
$ilfrom = intval( $cont[0] );
$ilto = $this->getDB()->addQuotes( $cont[1] );
$this->addWhere(
"il_from $op $ilfrom OR " .
"(il_from = $ilfrom AND " .
"il_to $op= $ilto)"
);
}
$sort = ( $params['dir'] == 'descending' ? ' DESC' : '' );
// 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' . $sort );
} else {
$this->addOption( 'ORDER BY', array(
'il_from' . $sort,
'il_to' . $sort
) );
}
$this->addOption( 'LIMIT', $params['limit'] + 1 );
if ( !is_null( $params['images'] ) ) {
$images = array();
foreach ( $params['images'] as $img ) {
$title = Title::newFromText( $img );
if ( !$title || $title->getNamespace() != NS_FILE ) {
$this->setWarning( "\"$img\" is not a file" );
} else {
$images[] = $title->getDBkey();
}
}
$this->addWhereFld( 'il_to', $images );
}
$res = $this->select( __METHOD__ );
if ( is_null( $resultPageSet ) ) {
$count = 0;
foreach ( $res as $row ) {
if ( ++$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 . '|' . $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 . '|' . $row->il_to );
break;
}
}
} else {
$titles = array();
$count = 0;
foreach ( $res as $row ) {
if ( ++$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 . '|' . $row->il_to );
break;
}
$titles[] = Title::makeTitle( NS_FILE, $row->il_to );
}
$resultPageSet->populateFromTitles( $titles );
}
}
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' => array(
ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
),
'images' => array(
ApiBase::PARAM_ISMULTI => true,
),
'dir' => array(
ApiBase::PARAM_DFLT => 'ascending',
ApiBase::PARAM_TYPE => array(
'ascending',
'descending'
)
),
);
}
protected function getExamplesMessages() {
return array(
'action=query&prop=images&titles=Main%20Page'
=> 'apihelp-query+images-example-simple',
'action=query&generator=images&titles=Main%20Page&prop=info'
=> 'apihelp-query+images-example-generator',
);
}
public function getHelpUrls() {
return 'https://www.mediawiki.org/wiki/API:Properties#images_.2F_im';
}
}
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