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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
*/
/**
* A query module to enumerate categories the set of pages belong to.
*
* @ingroup API
*/
class ApiQueryCategories extends ApiQueryGeneratorBase {
public function __construct( ApiQuery $query, $moduleName ) {
parent::__construct( $query, $moduleName, 'cl' );
}
public function execute() {
$this->run();
}
public function getCacheMode( $params ) {
return 'public';
}
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();
$prop = array_flip( (array)$params['prop'] );
$show = array_flip( (array)$params['show'] );
$this->addFields( array(
'cl_from',
'cl_to'
) );
$this->addFieldsIf( array( 'cl_sortkey', 'cl_sortkey_prefix' ), isset( $prop['sortkey'] ) );
$this->addFieldsIf( 'cl_timestamp', isset( $prop['timestamp'] ) );
$this->addTables( 'categorylinks' );
$this->addWhereFld( 'cl_from', array_keys( $this->getPageSet()->getGoodTitles() ) );
if ( !is_null( $params['categories'] ) ) {
$cats = array();
foreach ( $params['categories'] as $cat ) {
$title = Title::newFromText( $cat );
if ( !$title || $title->getNamespace() != NS_CATEGORY ) {
$this->setWarning( "\"$cat\" is not a category" );
} else {
$cats[] = $title->getDBkey();
}
}
$this->addWhereFld( 'cl_to', $cats );
}
if ( !is_null( $params['continue'] ) ) {
$cont = explode( '|', $params['continue'] );
$this->dieContinueUsageIf( count( $cont ) != 2 );
$op = $params['dir'] == 'descending' ? '<' : '>';
$clfrom = intval( $cont[0] );
$clto = $this->getDB()->addQuotes( $cont[1] );
$this->addWhere(
"cl_from $op $clfrom OR " .
"(cl_from = $clfrom AND " .
"cl_to $op= $clto)"
);
}
if ( isset( $show['hidden'] ) && isset( $show['!hidden'] ) ) {
$this->dieUsageMsg( 'show' );
}
if ( isset( $show['hidden'] ) || isset( $show['!hidden'] ) || isset( $prop['hidden'] ) ) {
$this->addOption( 'STRAIGHT_JOIN' );
$this->addTables( array( 'page', 'page_props' ) );
$this->addFieldsIf( 'pp_propname', isset( $prop['hidden'] ) );
$this->addJoinConds( array(
'page' => array( 'LEFT JOIN', array(
'page_namespace' => NS_CATEGORY,
'page_title = cl_to' ) ),
'page_props' => array( 'LEFT JOIN', array(
'pp_page=page_id',
'pp_propname' => 'hiddencat' ) )
) );
if ( isset( $show['hidden'] ) ) {
$this->addWhere( array( 'pp_propname IS NOT NULL' ) );
} elseif ( isset( $show['!hidden'] ) ) {
$this->addWhere( array( 'pp_propname IS NULL' ) );
}
}
$sort = ( $params['dir'] == 'descending' ? ' DESC' : '' );
// Don't order by cl_from if it's constant in the WHERE clause
if ( count( $this->getPageSet()->getGoodTitles() ) == 1 ) {
$this->addOption( 'ORDER BY', 'cl_to' . $sort );
} else {
$this->addOption( 'ORDER BY', array(
'cl_from' . $sort,
'cl_to' . $sort
) );
}
$res = $this->select( __METHOD__ );
$count = 0;
if ( is_null( $resultPageSet ) ) {
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->cl_from . '|' . $row->cl_to );
break;
}
$title = Title::makeTitle( NS_CATEGORY, $row->cl_to );
$vals = array();
ApiQueryBase::addTitleInfo( $vals, $title );
if ( isset( $prop['sortkey'] ) ) {
$vals['sortkey'] = bin2hex( $row->cl_sortkey );
$vals['sortkeyprefix'] = $row->cl_sortkey_prefix;
}
if ( isset( $prop['timestamp'] ) ) {
$vals['timestamp'] = wfTimestamp( TS_ISO_8601, $row->cl_timestamp );
}
if ( isset( $prop['hidden'] ) ) {
$vals['hidden'] = !is_null( $row->pp_propname );
}
$fit = $this->addPageSubItem( $row->cl_from, $vals );
if ( !$fit ) {
$this->setContinueEnumParameter( 'continue', $row->cl_from . '|' . $row->cl_to );
break;
}
}
} else {
$titles = array();
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->cl_from . '|' . $row->cl_to );
break;
}
$titles[] = Title::makeTitle( NS_CATEGORY, $row->cl_to );
}
$resultPageSet->populateFromTitles( $titles );
}
}
public function getAllowedParams() {
return array(
'prop' => array(
ApiBase::PARAM_ISMULTI => true,
ApiBase::PARAM_TYPE => array(
'sortkey',
'timestamp',
'hidden',
),
ApiBase::PARAM_HELP_MSG_PER_VALUE => array(),
),
'show' => array(
ApiBase::PARAM_ISMULTI => true,
ApiBase::PARAM_TYPE => array(
'hidden',
'!hidden',
)
),
'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',
),
'categories' => 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=categories&titles=Albert%20Einstein'
=> 'apihelp-query+categories-example-simple',
'action=query&generator=categories&titles=Albert%20Einstein&prop=info'
=> 'apihelp-query+categories-example-generator',
);
}
public function getHelpUrls() {
return 'https://www.mediawiki.org/wiki/API:Categories';
}
}
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