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<?php
/**
* API for MediaWiki 1.17+
*
* Created on May 14, 2010
*
* Copyright © 2010 Sam Reed
* 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 list all interwiki links on a page
*
* @ingroup API
*/
class ApiQueryIWLinks extends ApiQueryBase {
public function __construct( $query, $moduleName ) {
parent::__construct( $query, $moduleName, 'iw' );
}
public function execute() {
if ( $this->getPageSet()->getGoodTitleCount() == 0 ) {
return;
}
$params = $this->extractRequestParams();
if ( isset( $params['title'] ) && !isset( $params['prefix'] ) ) {
$this->dieUsageMsg( array( 'missingparam', 'prefix' ) );
}
$this->addFields( array(
'iwl_from',
'iwl_prefix',
'iwl_title'
) );
$this->addTables( 'iwlinks' );
$this->addWhereFld( 'iwl_from', array_keys( $this->getPageSet()->getGoodTitles() ) );
if ( !is_null( $params['continue'] ) ) {
$cont = explode( '|', $params['continue'] );
if ( count( $cont ) != 3 ) {
$this->dieUsage( 'Invalid continue param. You should pass the ' .
'original value returned by the previous query', '_badcontinue' );
}
$iwlfrom = intval( $cont[0] );
$iwlprefix = $this->getDB()->strencode( $cont[1] );
$iwltitle = $this->getDB()->strencode( $this->titleToKey( $cont[2] ) );
$this->addWhere(
"iwl_from > $iwlfrom OR " .
"(iwl_from = $iwlfrom AND " .
"(iwl_prefix > '$iwlprefix' OR " .
"(iwl_prefix = '$iwlprefix' AND " .
"iwl_title >= '$iwltitle')))"
);
}
$dir = ( $params['dir'] == 'descending' ? ' DESC' : '' );
if ( isset( $params['prefix'] ) ) {
$this->addWhereFld( 'iwl_prefix', $params['prefix'] );
if ( isset( $params['title'] ) ) {
$this->addWhereFld( 'iwl_title', $params['title'] );
$this->addOption( 'ORDER BY', 'iwl_from' . $dir );
} else {
$this->addOption( 'ORDER BY', array(
'iwl_title' . $dir,
'iwl_from' . $dir
));
}
} else {
// Don't order by iwl_from if it's constant in the WHERE clause
if ( count( $this->getPageSet()->getGoodTitles() ) == 1 ) {
$this->addOption( 'ORDER BY', 'iwl_prefix' . $dir );
} else {
$this->addOption( 'ORDER BY', array (
'iwl_from' . $dir,
'iwl_prefix' . $dir
));
}
}
$this->addOption( 'LIMIT', $params['limit'] + 1 );
$res = $this->select( __METHOD__ );
$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->iwl_from}|{$row->iwl_prefix}|{$row->iwl_title}" );
break;
}
$entry = array( 'prefix' => $row->iwl_prefix );
if ( $params['url'] ) {
$title = Title::newFromText( "{$row->iwl_prefix}:{$row->iwl_title}" );
if ( $title ) {
$entry['url'] = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
}
}
ApiResult::setContent( $entry, $row->iwl_title );
$fit = $this->addPageSubItem( $row->iwl_from, $entry );
if ( !$fit ) {
$this->setContinueEnumParameter( 'continue', "{$row->iwl_from}|{$row->iwl_prefix}|{$row->iwl_title}" );
break;
}
}
}
public function getCacheMode( $params ) {
return 'public';
}
public function getAllowedParams() {
return array(
'url' => false,
'limit' => array(
ApiBase::PARAM_DFLT => 10,
ApiBase::PARAM_TYPE => 'limit',
ApiBase::PARAM_MIN => 1,
ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
),
'continue' => null,
'prefix' => null,
'title' => null,
'dir' => array(
ApiBase::PARAM_DFLT => 'ascending',
ApiBase::PARAM_TYPE => array(
'ascending',
'descending'
)
),
);
}
public function getParamDescription() {
return array(
'url' => 'Whether to get the full URL',
'limit' => 'How many interwiki links to return',
'continue' => 'When more results are available, use this to continue',
'prefix' => 'Prefix for the interwiki',
'title' => "Interwiki link to search for. Must be used with {$this->getModulePrefix()}prefix",
'dir' => 'The direction in which to list',
);
}
public function getDescription() {
return 'Returns all interwiki links from the given page(s)';
}
public function getPossibleErrors() {
return array_merge( parent::getPossibleErrors(), array(
array( 'missingparam', 'prefix' ),
array( 'code' => '_badcontinue', 'info' => 'Invalid continue param. You should pass the original value returned by the previous query' ),
) );
}
public function getExamples() {
return array(
'api.php?action=query&prop=iwlinks&titles=Main%20Page' => 'Get interwiki links from the [[Main Page]]',
);
}
public function getVersion() {
return __CLASS__ . ': $Id$';
}
}
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