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<?php
/**
* Created on December 31, 2012
*
* Copyright © 2012 Brad Jorsch <bjorsch@wikimedia.org>
*
* 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
* @since 1.21
* @author Brad Jorsch
*/
/**
* A query module to enumerate pages that use a particular prop
*
* @ingroup API
* @since 1.21
*/
class ApiQueryPagesWithProp extends ApiQueryGeneratorBase {
public function __construct( $query, $moduleName ) {
parent::__construct( $query, $moduleName, 'pwp' );
}
public function execute() {
$this->run();
}
public function getCacheMode( $params ) {
return 'public';
}
public function executeGenerator( $resultPageSet ) {
$this->run( $resultPageSet );
}
/**
* @param $resultPageSet ApiPageSet
* @return void
*/
private function run( $resultPageSet = null ) {
$params = $this->extractRequestParams();
$prop = array_flip( $params['prop'] );
$fld_ids = isset( $prop['ids'] );
$fld_title = isset( $prop['title'] );
$fld_value = isset( $prop['value'] );
if ( $resultPageSet === null ) {
$this->addFields( array( 'page_id' ) );
$this->addFieldsIf( array( 'page_title', 'page_namespace' ), $fld_title );
$this->addFieldsIf( 'pp_value', $fld_value );
} else {
$this->addFields( $resultPageSet->getPageTableFields() );
}
$this->addTables( array( 'page_props', 'page' ) );
$this->addWhere( 'pp_page=page_id' );
$this->addWhereFld( 'pp_propname', $params['propname'] );
$dir = ( $params['dir'] == 'ascending' ) ? 'newer' : 'older';
if ( $params['continue'] ) {
$cont = explode( '|', $params['continue'] );
$this->dieContinueUsageIf( count( $cont ) != 1 );
// Add a WHERE clause
$from = (int)$cont[0];
$this->addWhereRange( 'pp_page', $dir, $from, null );
}
$sort = ( $params['dir'] === 'descending' ? ' DESC' : '' );
$this->addOption( 'ORDER BY', 'pp_page' . $sort );
$limit = $params['limit'];
$this->addOption( 'LIMIT', $limit + 1 );
$result = $this->getResult();
$count = 0;
foreach ( $this->select( __METHOD__ ) as $row ) {
if ( ++$count > $limit ) {
// We've reached the one extra which shows that there are additional pages to be had. Stop here...
$this->setContinueEnumParameter( 'continue', $row->page_id );
break;
}
if ( $resultPageSet === null ) {
$vals = array();
if ( $fld_ids ) {
$vals['pageid'] = (int)$row->page_id;
}
if ( $fld_title ) {
$title = Title::makeTitle( $row->page_namespace, $row->page_title );
ApiQueryBase::addTitleInfo( $vals, $title );
}
if ( $fld_value ) {
$vals['value'] = $row->pp_value;
}
$fit = $result->addValue( array( 'query', $this->getModuleName() ), null, $vals );
if ( !$fit ) {
$this->setContinueEnumParameter( 'continue', $row->page_id );
break;
}
} else {
$resultPageSet->processDbRow( $row );
}
}
if ( $resultPageSet === null ) {
$result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'page' );
}
}
public function getAllowedParams() {
return array(
'propname' => array(
ApiBase::PARAM_TYPE => 'string',
ApiBase::PARAM_REQUIRED => true,
),
'prop' => array(
ApiBase::PARAM_DFLT => 'ids|title',
ApiBase::PARAM_ISMULTI => true,
ApiBase::PARAM_TYPE => array(
'ids',
'title',
'value',
)
),
'continue' => null,
'limit' => array(
ApiBase::PARAM_TYPE => 'limit',
ApiBase::PARAM_DFLT => 10,
ApiBase::PARAM_MIN => 1,
ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
),
'dir' => array(
ApiBase::PARAM_DFLT => 'ascending',
ApiBase::PARAM_TYPE => array(
'ascending',
'descending',
)
),
);
}
public function getParamDescription() {
return array(
'propname' => 'Page prop for which to enumerate pages',
'prop' => array(
'What pieces of information to include',
' ids - Adds the page ID',
' title - Adds the title and namespace ID of the page',
' value - Adds the value of the page prop',
),
'dir' => 'In which direction to sort',
'continue' => 'When more results are available, use this to continue',
'limit' => 'The maximum number of pages to return',
);
}
public function getDescription() {
return 'List all pages using a given page prop';
}
public function getExamples() {
return array(
'api.php?action=query&list=pageswithprop&pwppropname=displaytitle&pwpprop=ids|title|value' => 'Get first 10 pages using {{DISPLAYTITLE:}}',
'api.php?action=query&generator=pageswithprop&gpwppropname=notoc&prop=info' => 'Get page info about first 10 pages using __NOTOC__',
);
}
public function getHelpUrls() {
return 'https://www.mediawiki.org/wiki/API:Pageswithprop';
}
}
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