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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( ApiQuery $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 ApiPageSet $resultPageSet
*/
private function run( $resultPageSet = null ) {
$params = $this->extractRequestParams();
$namespaces = $this->getPageSet()->getAllTitlesByNamespace();
if ( empty( $namespaces[NS_FILE] ) ) {
return;
}
$images = $namespaces[NS_FILE];
if ( $params['dir'] == 'descending' ) {
$images = array_reverse( $images );
}
$skipUntilThisDup = false;
if ( isset( $params['continue'] ) ) {
$cont = explode( '|', $params['continue'] );
$this->dieContinueUsageIf( count( $cont ) != 2 );
$fromImage = $cont[0];
$skipUntilThisDup = $cont[1];
// Filter out any images before $fromImage
foreach ( $images as $image => $pageId ) {
if ( $image < $fromImage ) {
unset( $images[$image] );
} else {
break;
}
}
}
$filesToFind = array_keys( $images );
if ( $params['localonly'] ) {
$files = RepoGroup::singleton()->getLocalRepo()->findFiles( $filesToFind );
} else {
$files = RepoGroup::singleton()->findFiles( $filesToFind );
}
$fit = true;
$count = 0;
$titles = array();
$sha1s = array();
foreach ( $files as $file ) {
/** @var $file File */
$sha1s[$file->getName()] = $file->getSha1();
}
// find all files with the hashes, result format is:
// array( hash => array( dup1, dup2 ), hash1 => ... )
$filesToFindBySha1s = array_unique( array_values( $sha1s ) );
if ( $params['localonly'] ) {
$filesBySha1s = RepoGroup::singleton()->getLocalRepo()->findBySha1s( $filesToFindBySha1s );
} else {
$filesBySha1s = RepoGroup::singleton()->findBySha1s( $filesToFindBySha1s );
}
// iterate over $images to handle continue param correct
foreach ( $images as $image => $pageId ) {
if ( !isset( $sha1s[$image] ) ) {
continue; //file does not exist
}
$sha1 = $sha1s[$image];
$dupFiles = $filesBySha1s[$sha1];
if ( $params['dir'] == 'descending' ) {
$dupFiles = array_reverse( $dupFiles );
}
/** @var $dupFile File */
foreach ( $dupFiles as $dupFile ) {
$dupName = $dupFile->getName();
if ( $image == $dupName && $dupFile->isLocal() ) {
continue; //ignore the local file itself
}
if ( $skipUntilThisDup !== false && $dupName < $skipUntilThisDup ) {
continue; //skip to pos after the image from continue param
}
$skipUntilThisDup = false;
if ( ++$count > $params['limit'] ) {
$fit = false; //break outer loop
// We're one over limit which shows that
// there are additional images to be had. Stop here...
$this->setContinueEnumParameter( 'continue', $image . '|' . $dupName );
break;
}
if ( !is_null( $resultPageSet ) ) {
$titles[] = $dupFile->getTitle();
} else {
$r = array(
'name' => $dupName,
'user' => $dupFile->getUser( 'text' ),
'timestamp' => wfTimestamp( TS_ISO_8601, $dupFile->getTimestamp() )
);
if ( !$dupFile->isLocal() ) {
$r['shared'] = '';
}
$fit = $this->addPageSubItem( $pageId, $r );
if ( !$fit ) {
$this->setContinueEnumParameter( 'continue', $image . '|' . $dupName );
break;
}
}
}
if ( !$fit ) {
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'
)
),
'localonly' => false,
);
}
public function getParamDescription() {
return array(
'limit' => 'How many duplicate files to return',
'continue' => 'When more results are available, use this to continue',
'dir' => 'The direction in which to list',
'localonly' => 'Look only for files in the local repository',
);
}
public function getDescription() {
return 'List all files that are duplicates of the given file(s) based on hash values.';
}
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';
}
}
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