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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
*/
if ( !defined( 'MEDIAWIKI' ) ) {
// Eclipse helper - will be ignored in production
require_once( "ApiQueryBase.php" );
}
/**
* A query module to list all langlinks (links to correspanding foreign language pages).
*
* @ingroup API
*/
class ApiQueryLangLinks extends ApiQueryBase {
public function __construct( $query, $moduleName ) {
parent::__construct( $query, $moduleName, 'll' );
}
public function execute() {
if ( $this->getPageSet()->getGoodTitleCount() == 0 ) {
return;
}
$params = $this->extractRequestParams();
if ( isset( $params['title'] ) && !isset( $params['lang'] ) ) {
$this->dieUsageMsg( array( 'missingparam', 'lang' ) );
}
$this->addFields( array(
'll_from',
'll_lang',
'll_title'
) );
$this->addTables( 'langlinks' );
$this->addWhereFld( 'll_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' );
}
$llfrom = intval( $cont[0] );
$lllang = $this->getDB()->strencode( $cont[1] );
$this->addWhere(
"ll_from > $llfrom OR " .
"(ll_from = $llfrom AND " .
"ll_lang >= '$lllang')"
);
}
if ( isset( $params['lang'] ) ) {
$this->addWhereFld( 'll_lang', $params['lang'] );
if ( isset( $params['title'] ) ) {
$this->addWhereFld( 'll_title', $params['title'] );
$this->addOption( 'ORDER BY', 'll_from' );
} else {
$this->addOption( 'ORDER BY', 'll_title, ll_from' );
}
} else {
// Don't order by ll_from if it's constant in the WHERE clause
if ( count( $this->getPageSet()->getGoodTitles() ) == 1 ) {
$this->addOption( 'ORDER BY', 'll_lang' );
} else {
$this->addOption( 'ORDER BY', 'll_from, ll_lang' );
}
}
$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->ll_from}|{$row->ll_lang}" );
break;
}
$entry = array( 'lang' => $row->ll_lang );
if ( $params['url'] ) {
$title = Title::newFromText( "{$row->ll_lang}:{$row->ll_title}" );
if ( $title ) {
$entry['url'] = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
}
}
ApiResult::setContent( $entry, $row->ll_title );
$fit = $this->addPageSubItem( $row->ll_from, $entry );
if ( !$fit ) {
$this->setContinueEnumParameter( 'continue', "{$row->ll_from}|{$row->ll_lang}" );
break;
}
}
}
public function getCacheMode( $params ) {
return 'public';
}
public function getAllowedParams() {
return array(
'limit' => array(
ApiBase::PARAM_DFLT => 10,
ApiBase::PARAM_TYPE => 'limit',
ApiBase::PARAM_MIN => 1,
ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
),
'continue' => null,
'url' => false,
'lang' => null,
'title' => null,
);
}
public function getParamDescription() {
return array(
'limit' => 'How many langlinks to return',
'continue' => 'When more results are available, use this to continue',
'url' => 'Whether to get the full URL',
'lang' => 'Language code',
'title' => "Link to search for. Must be used with {$this->getModulePrefix()}lang",
);
}
public function getDescription() {
return 'Returns all interlanguage links from the given page(s)';
}
public function getPossibleErrors() {
return array_merge( parent::getPossibleErrors(), array(
array( 'missingparam', 'lang' ),
array( 'code' => '_badcontinue', 'info' => 'Invalid continue param. You should pass the original value returned by the previous query' ),
) );
}
protected function getExamples() {
return array(
'Get interlanguage links from the [[Main Page]]:',
' api.php?action=query&prop=langlinks&titles=Main%20Page&redirects=',
);
}
public function getHelpUrls() {
return 'https://www.mediawiki.org/wiki/API:Properties#langlinks_.2F_ll';
}
public function getVersion() {
return __CLASS__ . ': $Id$';
}
}
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