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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 list all langlinks (links to corresponding foreign language pages).
*
* @ingroup API
*/
class ApiQueryLangLinks extends ApiQueryBase {
public function __construct( ApiQuery $query, $moduleName ) {
parent::__construct( $query, $moduleName, 'll' );
}
public function execute() {
if ( $this->getPageSet()->getGoodTitleCount() == 0 ) {
return;
}
$params = $this->extractRequestParams();
$prop = array_flip( (array)$params['prop'] );
if ( isset( $params['title'] ) && !isset( $params['lang'] ) ) {
$this->dieUsageMsg( [ 'missingparam', 'lang' ] );
}
// Handle deprecated param
$this->requireMaxOneParameter( $params, 'url', 'prop' );
if ( $params['url'] ) {
$prop = [ 'url' => 1 ];
}
$this->addFields( [
'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'] );
$this->dieContinueUsageIf( count( $cont ) != 2 );
$op = $params['dir'] == 'descending' ? '<' : '>';
$llfrom = intval( $cont[0] );
$lllang = $this->getDB()->addQuotes( $cont[1] );
$this->addWhere(
"ll_from $op $llfrom OR " .
"(ll_from = $llfrom AND " .
"ll_lang $op= $lllang)"
);
}
// FIXME: (follow-up) To allow extensions to add to the language links, we need
// to load them all, add the extra links, then apply paging.
// Should not be terrible, it's not going to be more than a few hundred links.
// Note that, since (ll_from, ll_lang) is a unique key, we don't need
// to sort by ll_title to ensure deterministic ordering.
$sort = ( $params['dir'] == 'descending' ? ' DESC' : '' );
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' . $sort );
} 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' . $sort );
} else {
$this->addOption( 'ORDER BY', [
'll_from' . $sort,
'll_lang' . $sort
] );
}
}
$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 = [ 'lang' => $row->ll_lang ];
if ( isset( $prop['url'] ) ) {
$title = Title::newFromText( "{$row->ll_lang}:{$row->ll_title}" );
if ( $title ) {
$entry['url'] = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
}
}
if ( isset( $prop['langname'] ) ) {
$entry['langname'] = Language::fetchLanguageName( $row->ll_lang, $params['inlanguagecode'] );
}
if ( isset( $prop['autonym'] ) ) {
$entry['autonym'] = Language::fetchLanguageName( $row->ll_lang );
}
ApiResult::setContentValue( $entry, 'title', $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() {
global $wgContLang;
return [
'prop' => [
ApiBase::PARAM_ISMULTI => true,
ApiBase::PARAM_TYPE => [
'url',
'langname',
'autonym',
],
ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
],
'lang' => null,
'title' => null,
'dir' => [
ApiBase::PARAM_DFLT => 'ascending',
ApiBase::PARAM_TYPE => [
'ascending',
'descending'
]
],
'inlanguagecode' => $wgContLang->getCode(),
'limit' => [
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' => [
ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
],
'url' => [
ApiBase::PARAM_DFLT => false,
ApiBase::PARAM_DEPRECATED => true,
],
];
}
protected function getExamplesMessages() {
return [
'action=query&prop=langlinks&titles=Main%20Page&redirects='
=> 'apihelp-query+langlinks-example-simple',
];
}
public function getHelpUrls() {
return 'https://www.mediawiki.org/wiki/API:Langlinks';
}
}
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