escape HTML elements in docblock with double quotes
[lhc/web/wiklou.git] / includes / api / ApiQueryLinks.php
index 6bbd893..7b675b0 100644 (file)
@@ -1,11 +1,10 @@
 <?php
-
-/*
- * Created on May 12, 2007
+/**
  *
- * API for MediaWiki 1.8+
  *
- * Copyright (C) 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
+ * Created on May 12, 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
  *
  * 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 all wiki links on a given set of pages.
  *
@@ -38,162 +34,205 @@ class ApiQueryLinks extends ApiQueryGeneratorBase {
        const LINKS = 'links';
        const TEMPLATES = 'templates';
 
-       private $table, $prefix, $description;
-
-       public function __construct($query, $moduleName) {
+       private $table, $prefix, $description, $helpUrl;
 
-               switch ($moduleName) {
-                       case self::LINKS :
+       public function __construct( $query, $moduleName ) {
+               switch ( $moduleName ) {
+                       case self::LINKS:
                                $this->table = 'pagelinks';
                                $this->prefix = 'pl';
                                $this->description = 'link';
+                               $this->titlesParam = 'titles';
+                               $this->titlesParamDescription = 'Only list links to these titles. Useful for checking whether a certain page links to a certain title.';
+                               $this->helpUrl = 'https://www.mediawiki.org/wiki/API:Properties#links_.2F_pl';
                                break;
-                       case self::TEMPLATES :
+                       case self::TEMPLATES:
                                $this->table = 'templatelinks';
                                $this->prefix = 'tl';
                                $this->description = 'template';
+                               $this->titlesParam = 'templates';
+                               $this->titlesParamDescription = 'Only list these templates. Useful for checking whether a certain page uses a certain template.';
+                               $this->helpUrl = 'https://www.mediawiki.org/wiki/API:Properties#templates_.2F_tl';
                                break;
-                       default :
-                               ApiBase :: dieDebug(__METHOD__, 'Unknown module name');
+                       default:
+                               ApiBase::dieDebug( __METHOD__, 'Unknown module name' );
                }
 
-               parent :: __construct($query, $moduleName, $this->prefix);
+               parent::__construct( $query, $moduleName, $this->prefix );
        }
 
        public function execute() {
                $this->run();
        }
 
-       public function executeGenerator($resultPageSet) {
-               $this->run($resultPageSet);
+       public function getCacheMode( $params ) {
+               return 'public';
        }
 
-       private function run($resultPageSet = null) {
+       public function executeGenerator( $resultPageSet ) {
+               $this->run( $resultPageSet );
+       }
 
-               if ($this->getPageSet()->getGoodTitleCount() == 0)
+       /**
+        * @param $resultPageSet ApiPageSet
+        * @return
+        */
+       private function run( $resultPageSet = null ) {
+               if ( $this->getPageSet()->getGoodTitleCount() == 0 ) {
                        return; // nothing to do
+               }
 
                $params = $this->extractRequestParams();
 
-               $this->addFields(array (
-                       $this->prefix . '_from pl_from',
-                       $this->prefix . '_namespace pl_namespace',
-                       $this->prefix . '_title pl_title'
-               ));
-
-               $this->addTables($this->table);
-               $this->addWhereFld($this->prefix . '_from', array_keys($this->getPageSet()->getGoodTitles()));
-               $this->addWhereFld($this->prefix . '_namespace', $params['namespace']);
-
-               if(!is_null($params['continue'])) {
-                       $cont = explode('|', $params['continue']);
-                       if(count($cont) != 3)
-                               $this->dieUsage("Invalid continue param. You should pass the " .
-                                       "original value returned by the previous query", "_badcontinue");
-                       $plfrom = intval($cont[0]);
-                       $plns = intval($cont[1]);
-                       $pltitle = $this->getDb()->strencode($this->titleToKey($cont[2]));
-                       $this->addWhere("{$this->prefix}_from > $plfrom OR ".
-                                       "({$this->prefix}_from = $plfrom AND ".
-                                       "({$this->prefix}_namespace > $plns OR ".
-                                       "({$this->prefix}_namespace = $plns AND ".
-                                       "{$this->prefix}_title >= '$pltitle')))");
+               $this->addFields( array(
+                       $this->prefix . '_from AS pl_from',
+                       $this->prefix . '_namespace AS pl_namespace',
+                       $this->prefix . '_title AS pl_title'
+               ) );
+
+               $this->addTables( $this->table );
+               $this->addWhereFld( $this->prefix . '_from', array_keys( $this->getPageSet()->getGoodTitles() ) );
+               $this->addWhereFld( $this->prefix . '_namespace', $params['namespace'] );
+
+               if ( !is_null( $params[$this->titlesParam] ) ) {
+                       $lb = new LinkBatch;
+                       foreach ( $params[$this->titlesParam] as $t ) {
+                               $title = Title::newFromText( $t );
+                               if ( !$title ) {
+                                       $this->setWarning( "\"$t\" is not a valid title" );
+                               } else {
+                                       $lb->addObj( $title );
+                               }
+                       }
+                       $cond = $lb->constructSet( $this->prefix, $this->getDB() );
+                       if ( $cond ) {
+                               $this->addWhere( $cond );
+                       }
                }
 
-               # Here's some MySQL craziness going on: if you use WHERE foo='bar'
-               # and later ORDER BY foo MySQL doesn't notice the ORDER BY is pointless
-               # but instead goes and filesorts, because the index for foo was used
-               # already. To work around this, we drop constant fields in the WHERE
-               # clause from the ORDER BY clause
+               if ( !is_null( $params['continue'] ) ) {
+                       $cont = explode( '|', $params['continue'] );
+                       if ( count( $cont ) != 3 ) {
+                               $this->dieUsage( 'Invalid continue param. You should pass the ' .
+                                       'original value returned by the previous query', '_badcontinue' );
+                       }
+                       $op = $params['dir'] == 'descending' ? '<' : '>';
+                       $plfrom = intval( $cont[0] );
+                       $plns = intval( $cont[1] );
+                       $pltitle = $this->getDB()->addQuotes( $this->titleToKey( $cont[2] ) );
+                       $this->addWhere(
+                               "{$this->prefix}_from $op $plfrom OR " .
+                               "({$this->prefix}_from = $plfrom AND " .
+                               "({$this->prefix}_namespace $op $plns OR " .
+                               "({$this->prefix}_namespace = $plns AND " .
+                               "{$this->prefix}_title $op= $pltitle)))"
+                       );
+               }
+
+               $sort = ( $params['dir'] == 'descending' ? ' DESC' : '' );
+               // Here's some MySQL craziness going on: if you use WHERE foo='bar'
+               // and later ORDER BY foo MySQL doesn't notice the ORDER BY is pointless
+               // but instead goes and filesorts, because the index for foo was used
+               // already. To work around this, we drop constant fields in the WHERE
+               // clause from the ORDER BY clause
                $order = array();
-               if(count($this->getPageSet()->getGoodTitles()) != 1)
-                       $order[] = "{$this->prefix}_from";
-               if(count($params['namespace']) != 1)
-                       $order[] = "{$this->prefix}_namespace";
-               $order[] = "{$this->prefix}_title";
-               $this->addOption('ORDER BY', implode(", ", $order));
-               $this->addOption('USE INDEX', "{$this->prefix}_from");
-               $this->addOption('LIMIT', $params['limit'] + 1);
-
-               $db = $this->getDB();
-               $res = $this->select(__METHOD__);
-
-               if (is_null($resultPageSet)) {
-
-                       $data = array();
-                       $lastId = 0;    // database has no ID 0
+               if ( count( $this->getPageSet()->getGoodTitles() ) != 1 ) {
+                       $order[] = $this->prefix . '_from' . $sort;
+               }
+               if ( count( $params['namespace'] ) != 1 ) {
+                       $order[] = $this->prefix . '_namespace' . $sort;
+               }
+
+               $order[] = $this->prefix . '_title' . $sort;
+               $this->addOption( 'ORDER BY', $order );
+               $this->addOption( 'USE INDEX', $this->prefix . '_from' );
+               $this->addOption( 'LIMIT', $params['limit'] + 1 );
+
+               $res = $this->select( __METHOD__ );
+
+               if ( is_null( $resultPageSet ) ) {
                        $count = 0;
-                       while ($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',
+                                       $this->setContinueEnumParameter( 'continue',
                                                "{$row->pl_from}|{$row->pl_namespace}|" .
-                                               $this->keyToTitle($row->pl_title));
+                                               $this->keyToTitle( $row->pl_title ) );
                                        break;
                                }
-                               if ($lastId != $row->pl_from) {
-                                       if($lastId != 0) {
-                                               $this->addPageSubItems($lastId, $data);
-                                               $data = array();
-                                       }
-                                       $lastId = $row->pl_from;
-                               }
-
                                $vals = array();
-                               ApiQueryBase :: addTitleInfo($vals, Title :: makeTitle($row->pl_namespace, $row->pl_title));
-                               $data[] = $vals;
-                       }
-
-                       if($lastId != 0) {
-                               $this->addPageSubItems($lastId, $data);
+                               ApiQueryBase::addTitleInfo( $vals, Title::makeTitle( $row->pl_namespace, $row->pl_title ) );
+                               $fit = $this->addPageSubItem( $row->pl_from, $vals );
+                               if ( !$fit ) {
+                                       $this->setContinueEnumParameter( 'continue',
+                                               "{$row->pl_from}|{$row->pl_namespace}|" .
+                                               $this->keyToTitle( $row->pl_title ) );
+                                       break;
+                               }
                        }
-
                } else {
-
                        $titles = array();
                        $count = 0;
-                       while ($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',
+                                       $this->setContinueEnumParameter( 'continue',
                                                "{$row->pl_from}|{$row->pl_namespace}|" .
-                                               $this->keyToTitle($row->pl_title));
+                                               $this->keyToTitle( $row->pl_title ) );
                                        break;
                                }
-                               $titles[] = Title :: makeTitle($row->pl_namespace, $row->pl_title);
+                               $titles[] = Title::makeTitle( $row->pl_namespace, $row->pl_title );
                        }
-                       $resultPageSet->populateFromTitles($titles);
+                       $resultPageSet->populateFromTitles( $titles );
                }
+       }
 
-               $db->freeResult($res);
+       public function getAllowedParams() {
+               return array(
+                       'namespace' => array(
+                               ApiBase::PARAM_TYPE => 'namespace',
+                               ApiBase::PARAM_ISMULTI => true
+                       ),
+                       '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,
+                       $this->titlesParam => array(
+                               ApiBase::PARAM_ISMULTI => true,
+                       ),
+                       'dir' => array(
+                               ApiBase::PARAM_DFLT => 'ascending',
+                               ApiBase::PARAM_TYPE => array(
+                                       'ascending',
+                                       'descending'
+                               )
+                       ),
+               );
        }
 
-       public function getAllowedParams()
-       {
+       public function getParamDescription() {
+               $desc = $this->description;
                return array(
-                               'namespace' => array(
-                                       ApiBase :: PARAM_TYPE => 'namespace',
-                                       ApiBase :: PARAM_ISMULTI => true
-                               ),
-                               'limit' => array(
-                                       ApiBase :: PARAM_DFLT => 10,
-                                       ApiBase :: PARAM_TYPE => 'limit',
-                                       ApiBase :: PARAM_MIN => 1,
-                                       ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
-                                       ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
-                               ),
-                               'continue' => null,
-                       );
+                       'namespace' => "Show {$desc}s in this namespace(s) only",
+                       'limit' => "How many {$desc}s to return",
+                       'continue' => 'When more results are available, use this to continue',
+                       $this->titlesParam => $this->titlesParamDescription,
+                       'dir' => 'The direction in which to list',
+               );
        }
 
-       public function getParamDescription()
-       {
+       public function getResultProperties() {
                return array(
-                               'namespace' => "Show {$this->description}s in this namespace(s) only",
-                               'limit' => 'How many links to return',
-                               'continue' => 'When more results are available, use this to continue',
+                       '' => array(
+                               'ns' => 'namespace',
+                               'title' => 'string'
+                       )
                );
        }
 
@@ -201,15 +240,18 @@ class ApiQueryLinks extends ApiQueryGeneratorBase {
                return "Returns all {$this->description}s from the given page(s)";
        }
 
-       protected function getExamples() {
-               return array (
-                               "Get {$this->description}s from the [[Main Page]]:",
-                               "  api.php?action=query&prop={$this->getModuleName()}&titles=Main%20Page",
-                               "Get information about the {$this->description} pages in the [[Main Page]]:",
-                               "  api.php?action=query&generator={$this->getModuleName()}&titles=Main%20Page&prop=info",
-                               "Get {$this->description}s from the Main Page in the User and Template namespaces:",
-                               "  api.php?action=query&prop={$this->getModuleName()}&titles=Main%20Page&{$this->prefix}namespace=2|10"
-                       );
+       public function getExamples() {
+               $desc = $this->description;
+               $name = $this->getModuleName();
+               return array(
+                       "api.php?action=query&prop={$name}&titles=Main%20Page" => "Get {$desc}s from the [[Main Page]]:",
+                       "api.php?action=query&generator={$name}&titles=Main%20Page&prop=info" => "Get information about the {$desc} pages in the [[Main Page]]:",
+                       "api.php?action=query&prop={$name}&titles=Main%20Page&{$this->prefix}namespace=2|10" => "Get {$desc}s from the Main Page in the User and Template namespaces:",
+               );
+       }
+
+       public function getHelpUrls() {
+               return $this->helpUrl;
        }
 
        public function getVersion() {