Merge branch 'master' of ssh://gerrit.wikimedia.org:29418/mediawiki/core into Wikidata
[lhc/web/wiklou.git] / includes / api / ApiQueryDuplicateFiles.php
index 67bae8b..6fb3ea3 100644 (file)
@@ -1,11 +1,10 @@
 <?php
-
-/*
- * Created on Sep 27, 2008
+/**
  *
- * API for MediaWiki 1.8+
  *
- * Copyright (C) 2008 Roan Kattow <Firstname>,<Lastname>@home.nl
+ * 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
  *
  * 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.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * 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 duplicates of the given file(s)
  *
@@ -35,121 +31,159 @@ if (!defined('MEDIAWIKI')) {
  */
 class ApiQueryDuplicateFiles extends ApiQueryGeneratorBase {
 
-       public function __construct($query, $moduleName) {
-               parent :: __construct($query, $moduleName, 'df');
+       public function __construct( $query, $moduleName ) {
+               parent::__construct( $query, $moduleName, 'df' );
        }
 
        public function execute() {
                $this->run();
        }
 
-       public function executeGenerator($resultPageSet) {
-               $this->run($resultPageSet);
+       public function getCacheMode( $params ) {
+               return 'public';
+       }
+
+       public function executeGenerator( $resultPageSet ) {
+               $this->run( $resultPageSet );
        }
 
-       private function run($resultPageSet = null) {
+       /**
+        * @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(
+
+               $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),
+               ) );
+
+               $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')");
+               ) );
+
+               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' );
+                       }
+                       $op = $params['dir'] == 'descending' ? '<' : '>';
+                       $db = $this->getDB();
+                       $orig = $db->addQuotes( $this->titleTokey( $cont[0] ) );
+                       $dup = $db->addQuotes( $this->titleToKey( $cont[1] ) );
+                       $this->addWhere(
+                               "i1.img_name $op $orig OR " .
+                               "(i1.img_name = $orig AND " .
+                               "i2.img_name $op= $dup)"
+                       );
+               }
+
+               $sort = ( $params['dir'] == 'descending' ? ' DESC' : '' );
+               // Don't order by i1.img_name if it's constant in the WHERE clause
+               if ( count( $this->getPageSet()->getGoodTitles() ) == 1 ) {
+                       $this->addOption( 'ORDER BY', 'i2.img_name' . $sort );
+               } else {
+                       $this->addOption( 'ORDER BY', array(
+                                       'i1.img_name' . $sort,
+                                       'i2.img_name' . $sort
+                       ));
                }
-               $this->addOption('ORDER BY', 'i1.img_name');
-               $this->addOption('LIMIT', $params['limit'] + 1);
+               $this->addOption( 'LIMIT', $params['limit'] + 1 );
 
-               $res = $this->select(__METHOD__);
-               $db = $this->getDB();
+               $res = $this->select( __METHOD__ );
                $count = 0;
                $titles = array();
-               while($row = $db->fetchObject($res))
-               {
-                       if(++$count > $params['limit'])
-                       {
+               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));
+                               $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
-                       {
+                       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)
+                                       '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));
+                               $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);
-               $db->freeResult($res);
+               if ( !is_null( $resultPageSet ) ) {
+                       $resultPageSet->populateFromTitles( $titles );
+               }
        }
 
        public function getAllowedParams() {
-               return array (
+               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
+                               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 (
+               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).';
+               return 'List all files that are duplicates of the given file(s)';
        }
 
-       protected function getExamples() {
-               return array (  'api.php?action=query&titles=Image:Albert_Einstein_Head.jpg&prop=duplicatefiles',
-                               'api.php?action=query&generator=allimages&prop=duplicatefiles',
-                       );
+       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() {