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<?php
/**
*
*
* Created on Sep 27, 2008
*
* Copyright © 2008 Roan Kattouw <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 duplicates of the given file(s)
*
* @ingroup API
*/
class ApiQueryDuplicateFiles extends ApiQueryGeneratorBase {
public function __construct( $query, $moduleName ) {
parent::__construct( $query, $moduleName, 'df' );
}
public function execute() {
$this->run();
}
public function getCacheMode( $params ) {
return 'public';
}
public function executeGenerator( $resultPageSet ) {
$this->run( $resultPageSet );
}
/**
* @param $resultPageSet ApiPageSet
* @return
*/
private function run( $resultPageSet = null ) {
$params = $this->extractRequestParams();
$namespaces = $this->getPageSet()->getAllTitlesByNamespace();
if ( empty( $namespaces[NS_FILE] ) ) {
return;
}
$images = $namespaces[NS_FILE];
$this->addTables( 'image', 'i1' );
$this->addTables( 'image', 'i2' );
$this->addFields( array(
'i1.img_name AS orig_name',
'i2.img_name AS dup_name',
'i2.img_user_text AS dup_user_text',
'i2.img_timestamp AS dup_timestamp'
) );
$this->addWhere( array(
'i1.img_name' => array_keys( $images ),
'i1.img_sha1 = i2.img_sha1',
'i1.img_name != i2.img_name',
) );
if ( isset( $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' );
}
$orig = $this->getDB()->strencode( $this->titleTokey( $cont[0] ) );
$dup = $this->getDB()->strencode( $this->titleToKey( $cont[1] ) );
$this->addWhere(
"i1.img_name > '$orig' OR " .
"(i1.img_name = '$orig' AND " .
"i2.img_name >= '$dup')"
);
}
$dir = ( $params['dir'] == 'descending' ? ' DESC' : '' );
$this->addOption( 'ORDER BY', 'i1.img_name' . $dir );
$this->addOption( 'LIMIT', $params['limit'] + 1 );
$res = $this->select( __METHOD__ );
$count = 0;
$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',
$this->keyToTitle( $row->orig_name ) . '|' .
$this->keyToTitle( $row->dup_name ) );
break;
}
if ( !is_null( $resultPageSet ) ) {
$titles[] = Title::makeTitle( NS_FILE, $row->dup_name );
} else {
$r = array(
'name' => $row->dup_name,
'user' => $row->dup_user_text,
'timestamp' => wfTimestamp( TS_ISO_8601, $row->dup_timestamp )
);
$fit = $this->addPageSubItem( $images[$row->orig_name], $r );
if ( !$fit ) {
$this->setContinueEnumParameter( 'continue',
$this->keyToTitle( $row->orig_name ) . '|' .
$this->keyToTitle( $row->dup_name ) );
break;
}
}
}
if ( !is_null( $resultPageSet ) ) {
$resultPageSet->populateFromTitles( $titles );
}
}
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,
'dir' => array(
ApiBase::PARAM_DFLT => 'ascending',
ApiBase::PARAM_TYPE => array(
'ascending',
'descending'
)
),
);
}
public function getParamDescription() {
return array(
'limit' => 'How many files to return',
'continue' => 'When more results are available, use this to continue',
'dir' => 'The direction in which to list',
);
}
public function getDescription() {
return 'List all files that are duplicates of the given file(s)';
}
public function getPossibleErrors() {
return array_merge( parent::getPossibleErrors(), array(
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&titles=File:Albert_Einstein_Head.jpg&prop=duplicatefiles',
'api.php?action=query&generator=allimages&prop=duplicatefiles',
);
}
public function getHelpUrls() {
return 'https://www.mediawiki.org/wiki/API:Properties#duplicatefiles_.2F_df';
}
public function getVersion() {
return __CLASS__ . ': $Id$';
}
}
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