Start better utalizing OutputPage as the focal point for things related to the output...
[lhc/web/wiklou.git] / includes / api / ApiParse.php
index 205fa0b..714a8eb 100644 (file)
@@ -1,11 +1,10 @@
 <?php
-
-/*
- * Created on Dec 01, 2007
+/**
  *
- * API for MediaWiki 1.8+
  *
- * Copyright (C) 2007 Yuri Astrakhan <Firstname><Lastname>@gmail.com
+ * Created on Dec 01, 2007
+ *
+ * Copyright © 2007 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')) {
+if ( !defined( 'MEDIAWIKI' ) ) {
        // Eclipse helper - will be ignored in production
-       require_once ("ApiBase.php");
+       require_once( "ApiBase.php" );
 }
 
 /**
- * @addtogroup API
+ * @ingroup API
  */
 class ApiParse extends ApiBase {
 
-       public function __construct($main, $action) {
-               parent :: __construct($main, $action);
+       private $section, $text, $pstText = null;
+
+       public function __construct( $main, $action ) {
+               parent::__construct( $main, $action );
        }
 
        public function execute() {
+               // The data is hot but user-dependent, like page views, so we set vary cookies
+               $this->getMain()->setCacheMode( 'anon-public-user-private' );
+
                // Get parameters
                $params = $this->extractRequestParams();
                $text = $params['text'];
                $title = $params['title'];
-               $prop = array_flip($params['prop']);
+               $page = $params['page'];
+               $pageid = $params['pageid'];
+               $oldid = $params['oldid'];
+
+               if ( !is_null( $page ) && ( !is_null( $text ) || $title != 'API' ) ) {
+                       $this->dieUsage( 'The page parameter cannot be used together with the text and title parameters', 'params' );
+               }
+               $prop = array_flip( $params['prop'] );
 
-               //Create title for parser
-               $title_obj = Title :: newFromText($params['title']);
-               if(!$title_obj)
-                       $title_obj = Title :: newFromText("API");       //  Default title is "API". For example, ExpandTemplates uses "ExpendTemplates" for it
+               if ( isset( $params['section'] ) ) {
+                       $this->section = $params['section'];
+               } else {
+                       $this->section = false;
+               }
 
-               // Parse text
-               global $wgParser;
-               $p_result = $wgParser->parse( $text, $title_obj, new ParserOptions() );
+               // The parser needs $wgTitle to be set, apparently the
+               // $title parameter in Parser::parse isn't enough *sigh*
+               global $wgParser, $wgUser, $wgTitle, $wgLang;
+
+               // Currently unnecessary, code to act as a safeguard against any change in current behaviour of uselang breaks
+               $oldLang = null;
+               if ( isset( $params['uselang'] ) && $params['uselang'] != $wgLang->getCode() ) {
+                       $oldLang = $wgLang; // Backup wgLang
+                       $wgLang = Language::factory( $params['uselang'] );
+               }
+
+               $popts = new ParserOptions();
+               $popts->setTidy( true );
+               $popts->enableLimitReport( !$params['disablepp'] );
+
+               $redirValues = null;
+
+               if ( !is_null( $oldid ) || !is_null( $pageid ) || !is_null( $page ) ) {
+
+                       if ( !is_null( $oldid ) ) {
+                               // Don't use the parser cache
+                               $rev = Revision::newFromID( $oldid );
+                               if ( !$rev ) {
+                                       $this->dieUsage( "There is no revision ID $oldid", 'missingrev' );
+                               }
+                               if ( !$rev->userCan( Revision::DELETED_TEXT ) ) {
+                                       $this->dieUsage( "You don't have permission to view deleted revisions", 'permissiondenied' );
+                               }
+
+                               $titleObj = $rev->getTitle();
+
+                               $wgTitle = $titleObj;
+
+                               // If for some reason the "oldid" is actually the current revision, it may be cached
+                               if ( $titleObj->getLatestRevID() === intval( $oldid ) )  {
+                                       $articleObj = new Article( $titleObj, 0 );
+
+                                       $p_result = $this->getParsedSectionOrText( $articleObj, $titleObj, $popts, $pageid,
+                                                isset( $prop['wikitext'] ) ) ;
+
+                               } else { // This is an old revision, so get the text differently
+                                       $this->text = $rev->getText( Revision::FOR_THIS_USER );
+
+                                       $wgTitle = $titleObj;
+
+                                       if ( $this->section !== false ) {
+                                               $this->text = $this->getSectionText( $this->text, 'r' . $rev->getId() );
+                                       }
+
+                                       $p_result = $wgParser->parse( $this->text, $titleObj, $popts );
+                               }
+
+                       } else { // Not $oldid
+
+                               if ( !is_null ( $pageid ) ) {
+                                       $titleObj = Title::newFromID( $pageid );
+
+                                       if ( !$titleObj ) {
+                                               $this->dieUsageMsg( array( 'nosuchpageid', $pageid ) );
+                                       }
+                               } else { // $page
+
+                                       if ( $params['redirects'] ) {
+                                               $req = new FauxRequest( array(
+                                                       'action' => 'query',
+                                                       'redirects' => '',
+                                                       'titles' => $page
+                                               ) );
+                                               $main = new ApiMain( $req );
+                                               $main->execute();
+                                               $data = $main->getResultData();
+                                               $redirValues = @$data['query']['redirects'];
+                                               $to = $page;
+                                               foreach ( (array)$redirValues as $r ) {
+                                                       $to = $r['to'];
+                                               }
+                                       } else {
+                                               $to = $page;
+                                       }
+                                       $titleObj = Title::newFromText( $to );
+                                       if ( !$titleObj || !$titleObj->exists() ) {
+                                               $this->dieUsage( "The page you specified doesn't exist", 'missingtitle' );
+                                       }
+                               }
+                               $wgTitle = $titleObj;
+
+                               $articleObj = new Article( $titleObj, 0 );
+                               if ( isset( $prop['revid'] ) ) {
+                                       $oldid = $articleObj->getRevIdFetched();
+                               }
+
+                               $p_result = $this->getParsedSectionOrText( $articleObj, $titleObj, $popts, $pageid,
+                                        isset( $prop['wikitext'] ) ) ;
+                       }
+
+               } else { // Not $oldid, $pageid, $page. Hence based on $text
+
+                       $this->text = $text;
+                       $titleObj = Title::newFromText( $title );
+                       if ( !$titleObj ) {
+                               $titleObj = Title::newFromText( 'API' );
+                       }
+                       $wgTitle = $titleObj;
+
+                       if ( $this->section !== false ) {
+                               $this->text = $this->getSectionText( $this->text, $titleObj->getText() );
+                       }
+
+                       if ( $params['pst'] || $params['onlypst'] ) {
+                               $this->pstText = $wgParser->preSaveTransform( $this->text, $titleObj, $wgUser, $popts );
+                       }
+                       if ( $params['onlypst'] ) {
+                               // Build a result and bail out
+                               $result_array['text'] = array();
+                               $this->getResult()->setContent( $result_array['text'], $this->pstText );
+                               if ( isset( $prop['wikitext'] ) ) {
+                                       $result_array['wikitext'] = array();
+                                       $this->getResult()->setContent( $result_array['wikitext'], $this->text );
+                               }
+                               $this->getResult()->addValue( null, $this->getModuleName(), $result_array );
+                               return;
+                       }
+                       $p_result = $wgParser->parse( $params['pst'] ? $this->pstText : $this->text, $titleObj, $popts );
+               }
 
                // Return result
                $result = $this->getResult();
                $result_array = array();
-               if(isset($prop['text'])) {
+
+               $result_array['title'] = $titleObj->getPrefixedText();
+
+               if ( !is_null( $oldid ) ) {
+                       $result_array['revid'] = intval( $oldid );
+               }
+
+               if ( $params['redirects'] && !is_null( $redirValues ) ) {
+                       $result_array['redirects'] = $redirValues;
+               }
+
+               if ( isset( $prop['text'] ) ) {
                        $result_array['text'] = array();
-                       $result->setContent($result_array['text'], $p_result->getText());
-               }
-               if(isset($prop['langlinks']))
-                       $result_array['langlinks'] = $this->formatLangLinks($p_result->getLanguageLinks());
-               if(isset($prop['categories']))
-                       $result_array['categories'] = $this->formatCategoryLinks($p_result->getCategories());
-               if(isset($prop['links']))
-                       $result_array['links'] = $this->formatLinks($p_result->getLinks());
-               if(isset($prop['templates']))
-                       $result_array['templates'] = $this->formatLinks($p_result->getTemplates());
-               if(isset($prop['images']))
-                       $result_array['images'] = array_keys($p_result->getImages());
-               if(isset($prop['externallinks']))
-                       $result_array['externallinks'] = array_keys($p_result->getExternalLinks());
-               if(isset($prop['sections']))
+                       $result->setContent( $result_array['text'], $p_result->getText() );
+               }
+
+               if ( !is_null( $params['summary'] ) ) {
+                       $result_array['parsedsummary'] = array();
+                       $result->setContent( $result_array['parsedsummary'], $wgUser->getSkin()->formatComment( $params['summary'], $titleObj ) );
+               }
+
+               if ( isset( $prop['langlinks'] ) ) {
+                       $result_array['langlinks'] = $this->formatLangLinks( $p_result->getLanguageLinks() );
+               }
+               if ( isset( $prop['languageshtml'] ) ) {
+                       $languagesHtml = $this->languagesHtml( $p_result->getLanguageLinks() );
+                       $result_array['languageshtml'] = array();
+                       $result->setContent( $result_array['languageshtml'], $languagesHtml );
+               }
+               if ( isset( $prop['categories'] ) ) {
+                       $result_array['categories'] = $this->formatCategoryLinks( $p_result->getCategories() );
+               }
+               if ( isset( $prop['categorieshtml'] ) ) {
+                       $categoriesHtml = $this->categoriesHtml( $p_result->getCategories() );
+                       $result_array['categorieshtml'] = array();
+                       $result->setContent( $result_array['categorieshtml'], $categoriesHtml );
+               }
+               if ( isset( $prop['links'] ) ) {
+                       $result_array['links'] = $this->formatLinks( $p_result->getLinks() );
+               }
+               if ( isset( $prop['templates'] ) ) {
+                       $result_array['templates'] = $this->formatLinks( $p_result->getTemplates() );
+               }
+               if ( isset( $prop['images'] ) ) {
+                       $result_array['images'] = array_keys( $p_result->getImages() );
+               }
+               if ( isset( $prop['externallinks'] ) ) {
+                       $result_array['externallinks'] = array_keys( $p_result->getExternalLinks() );
+               }
+               if ( isset( $prop['sections'] ) ) {
                        $result_array['sections'] = $p_result->getSections();
+               }
+
+               if ( isset( $prop['displaytitle'] ) ) {
+                       $result_array['displaytitle'] = $p_result->getDisplayTitle() ?
+                                                       $p_result->getDisplayTitle() :
+                                                       $titleObj->getPrefixedText();
+               }
+
+               if ( isset( $prop['headitems'] ) || isset( $prop['headhtml'] ) ) {
+                       $out = new OutputPage;
+                       $out->setUser( $wgUser );
+                       $out->addParserOutputNoText( $p_result );
+                       $userSkin = $wgUser->getSkin();
+
+                       if ( isset( $prop['headitems'] ) ) {
+                               $headItems = $this->formatHeadItems( $p_result->getHeadItems() );
+
+                               $userSkin->setupUserCss( $out );
+                               $css = $this->formatCss( $out->buildCssLinksArray() );
+
+                               $scripts = array( $out->getHeadScripts( $userSkin ) );
+
+                               $result_array['headitems'] = array_merge( $headItems, $css, $scripts );
+                       }
+
+                       if ( isset( $prop['headhtml'] ) ) {
+                               $result_array['headhtml'] = array();
+                               $result->setContent( $result_array['headhtml'], $out->headElement( $userSkin ) );
+                       }
+               }
+
+               if ( isset( $prop['iwlinks'] ) ) {
+                       $result_array['iwlinks'] = $this->formatIWLinks( $p_result->getInterwikiLinks() );
+               }
                
+               if ( isset( $prop['wikitext'] ) ) {
+                       $result_array['wikitext'] = array();
+                       $result->setContent( $result_array['wikitext'], $this->text );
+                       if ( !is_null( $this->pstText ) ) {
+                               $result_array['psttext'] = array();
+                               $result->setContent( $result_array['psttext'], $this->pstText );
+                       }
+               }
+
                $result_mapping = array(
+                       'redirects' => 'r',
                        'langlinks' => 'll',
                        'categories' => 'cl',
                        'links' => 'pl',
                        'templates' => 'tl',
                        'images' => 'img',
                        'externallinks' => 'el',
+                       'iwlinks' => 'iw',
                        'sections' => 's',
+                       'headitems' => 'hi',
                );
                $this->setIndexedTagNames( $result_array, $result_mapping );
                $result->addValue( null, $this->getModuleName(), $result_array );
+
+               if ( !is_null( $oldLang ) ) {
+                       $wgLang = $oldLang; // Reset $wgLang to $oldLang
+               }
+       }
+
+       /**
+        * @param  $articleObj Article
+        * @param  $titleObj Title
+        * @param  $popts ParserOptions
+        * @param  $pageId Int
+        * @param  $getWikitext Bool
+        * @return ParserOutput
+        */
+       private function getParsedSectionOrText( $articleObj, $titleObj, $popts, $pageId = null, $getWikitext = false ) {
+               if ( $this->section !== false ) {
+                       global $wgParser;
+
+                       $this->text = $this->getSectionText( $articleObj->getRawText(), !is_null ( $pageId )
+                                       ? 'page id ' . $pageId : $titleObj->getText() );
+
+                       return $wgParser->parse( $this->text, $titleObj, $popts );
+               } else {
+                       // Try the parser cache first
+                       $pout = $articleObj->getParserOutput();
+                       if ( $getWikitext ) {
+                               $rev = Revision::newFromTitle( $titleObj );
+                               if ( $rev ) {
+                                       $this->text = $rev->getText();
+                               }
+                       }
+                       return $pout;
+               }
+       }
+
+       private function getSectionText( $text, $what ) {
+               global $wgParser;
+               $text = $wgParser->getSection( $text, $this->section, false );
+               if ( $text === false ) {
+                       $this->dieUsage( "There is no section {$this->section} in " . $what, 'nosuchsection' );
+               }
+               return $text;
        }
-       
+
        private function formatLangLinks( $links ) {
                $result = array();
-               foreach( $links as $link ) {
+               foreach ( $links as $link ) {
                        $entry = array();
-                       $bits = split( ':', $link, 2 );
+                       $bits = explode( ':', $link, 2 );
+                       $title = Title::newFromText( $link );
+                       
                        $entry['lang'] = $bits[0];
+                       if ( $title ) {
+                               $entry['url'] = $title->getFullURL();
+                       }
                        $this->getResult()->setContent( $entry, $bits[1] );
                        $result[] = $entry;
                }
                return $result;
        }
-       
+
        private function formatCategoryLinks( $links ) {
                $result = array();
-               foreach( $links as $link => $sortkey ) {
+               foreach ( $links as $link => $sortkey ) {
                        $entry = array();
                        $entry['sortkey'] = $sortkey;
                        $this->getResult()->setContent( $entry, $link );
@@ -110,57 +371,192 @@ class ApiParse extends ApiBase {
                }
                return $result;
        }
-       
+
+       private function categoriesHtml( $categories ) {
+               global $wgOut, $wgUser;
+               $wgOut->addCategoryLinks( $categories );
+               $sk = $wgUser->getSkin();
+               return $sk->getCategories();
+       }
+
+       /**
+        * @deprecated No modern skin generates langlinks this way, please use langlinks data to generate your own html
+        */
+       private function languagesHtml( $languages ) {
+               global $wgContLang, $wgHideInterlanguageLinks;
+
+               if ( $wgHideInterlanguageLinks || count( $languages ) == 0 ) {
+                       return '';
+               }
+
+               $s = htmlspecialchars( wfMsg( 'otherlanguages' ) . wfMsg( 'colon-separator' ) );
+
+               $langs = array();
+               foreach ( $languages as $l ) {
+                       $nt = Title::newFromText( $l );
+                       $text = $wgContLang->getLanguageName( $nt->getInterwiki() );
+
+                       $langs[] = Html::element( 'a',
+                               array( 'href' => $nt->getFullURL(), 'title' => $nt->getText(), 'class' => "external" ),
+                               $text == '' ? $l : $text );
+               }
+
+               $s .= implode( htmlspecialchars( wfMsgExt( 'pipe-separator', 'escapenoentities' ) ), $langs );
+
+               if ( $wgContLang->isRTL() ) {
+                       $s = Html::rawElement( 'span', array( 'dir' => "LTR" ), $s );
+               }
+
+               return $s;
+       }
+
        private function formatLinks( $links ) {
                $result = array();
-               foreach( $links as $ns => $nslinks ) {
-                       foreach( $nslinks as $title => $id ) {
+               foreach ( $links as $ns => $nslinks ) {
+                       foreach ( $nslinks as $title => $id ) {
                                $entry = array();
                                $entry['ns'] = $ns;
                                $this->getResult()->setContent( $entry, Title::makeTitle( $ns, $title )->getFullText() );
-                               if( $id != 0 )
+                               if ( $id != 0 ) {
                                        $entry['exists'] = '';
+                               }
                                $result[] = $entry;
                        }
                }
                return $result;
        }
-       
+
+       private function formatIWLinks( $iw ) {
+               $result = array();
+               foreach ( $iw as $prefix => $titles ) {
+                       foreach ( array_keys( $titles ) as $title ) {
+                               $entry = array();
+                               $entry['prefix'] = $prefix;
+
+                               $title = Title::newFromText( "{$prefix}:{$title}" );
+                               if ( $title ) {
+                                       $entry['url'] = $title->getFullURL();
+                               }
+
+                               $this->getResult()->setContent( $entry, $title->getFullText() );
+                               $result[] = $entry;
+                       }
+               }
+               return $result;
+       }
+
+       private function formatHeadItems( $headItems ) {
+               $result = array();
+               foreach ( $headItems as $tag => $content ) {
+                       $entry = array();
+                       $entry['tag'] = $tag;
+                       $this->getResult()->setContent( $entry, $content );
+                       $result[] = $entry;
+               }
+               return $result;
+       }
+
+       private function formatCss( $css ) {
+               $result = array();
+               foreach ( $css as $file => $link ) {
+                       $entry = array();
+                       $entry['file'] = $file;
+                       $this->getResult()->setContent( $entry, $link );
+                       $result[] = $entry;
+               }
+               return $result;
+       }
+
        private function setIndexedTagNames( &$array, $mapping ) {
-               foreach( $mapping as $key => $name ) {
-                       if( isset( $array[$key] ) )
+               foreach ( $mapping as $key => $name ) {
+                       if ( isset( $array[$key] ) ) {
                                $this->getResult()->setIndexedTagName( $array[$key], $name );
+                       }
                }
        }
 
        public function getAllowedParams() {
-               return array (
-                       'title' => array( 
-                               ApiBase :: PARAM_DFLT => 'API',
+               return array(
+                       'title' => array(
+                               ApiBase::PARAM_DFLT => 'API',
                        ),
                        'text' => null,
+                       'summary' => null,
+                       'page' => null,
+                       'pageid' => null,
+                       'redirects' => false,
+                       'oldid' => null,
                        'prop' => array(
-                               ApiBase :: PARAM_DFLT => 'text|langlinks|categories|links|templates|images|externallinks|sections',
-                               ApiBase :: PARAM_ISMULTI => true,
-                               ApiBase :: PARAM_TYPE => array(
+                               ApiBase::PARAM_DFLT => 'text|langlinks|categories|links|templates|images|externallinks|sections|revid|displaytitle',
+                               ApiBase::PARAM_ISMULTI => true,
+                               ApiBase::PARAM_TYPE => array(
                                        'text',
                                        'langlinks',
+                                       'languageshtml',
                                        'categories',
+                                       'categorieshtml',
                                        'links',
                                        'templates',
                                        'images',
                                        'externallinks',
-                                       'sections'
+                                       'sections',
+                                       'revid',
+                                       'displaytitle',
+                                       'headitems',
+                                       'headhtml',
+                                       'iwlinks',
+                                       'wikitext',
                                )
-                       )
+                       ),
+                       'pst' => false,
+                       'onlypst' => false,
+                       'uselang' => null,
+                       'section' => null,
+                       'disablepp' => false,
                );
        }
 
        public function getParamDescription() {
-               return array (
+               $p = $this->getModulePrefix();
+               return array(
                        'text' => 'Wikitext to parse',
-                       'title' => 'Title of page',
-                       'prop' => 'Which pieces of information to get'
+                       'summary' => 'Summary to parse',
+                       'redirects' => "If the {$p}page parameter is set to a redirect, resolve it",
+                       'title' => 'Title of page the text belongs to',
+                       'page' => "Parse the content of this page. Cannot be used together with {$p}text and {$p}title",
+                       'pageid' => "Parse the content of this page. Overrides {$p}page",
+                       'oldid' => "Parse the content of this revision. Overrides {$p}page and {$p}pageid",
+                       'prop' => array(
+                               'Which pieces of information to get',
+                               ' text           - Gives the parsed text of the wikitext',
+                               ' langlinks      - Gives the language links in the parsed wikitext',
+                               ' categories     - Gives the categories in the parsed wikitext',
+                               ' categorieshtml - Gives the HTML version of the categories',
+                               ' languageshtml  - Gives the HTML version of the language links',
+                               ' links          - Gives the internal links in the parsed wikitext',
+                               ' templates      - Gives the templates in the parsed wikitext',
+                               ' images         - Gives the images in the parsed wikitext',
+                               ' externallinks  - Gives the external links in the parsed wikitext',
+                               ' sections       - Gives the sections in the parsed wikitext',
+                               ' revid          - Adds the revision ID of the parsed page',
+                               ' displaytitle   - Adds the title of the parsed wikitext',
+                               ' headitems      - Gives items to put in the <head> of the page',
+                               ' headhtml       - Gives parsed <head> of the page',
+                               ' iwlinks        - Gives interwiki links in the parsed wikitext',
+                               ' wikitext       - Gives the original wikitext that was parsed',
+                               'NOTE: Section tree is only generated if there are more than 4 sections, or if the __TOC__ keyword is present'
+                       ),
+                       'pst' => array(
+                               'Do a pre-save transform on the input before parsing it',
+                               'Ignored if page, pageid or oldid is used'
+                       ),
+                       'onlypst' => array(
+                               'Do a pre-save transform (PST) on the input, but don\'t parse it',
+                               'Returns the same wikitext, after a PST has been applied. Ignored if page, pageid or oldid is used'
+                       ),
+                       'uselang' => 'Which language to parse the request in',
+                       'section' => 'Only retrieve the content of this section number',
+                       'disablepp' => 'Disable the PP Report from the parser output',
                );
        }
 
@@ -168,8 +564,19 @@ class ApiParse extends ApiBase {
                return 'This module parses wikitext and returns parser output';
        }
 
+       public function getPossibleErrors() {
+               return array_merge( parent::getPossibleErrors(), array(
+                       array( 'code' => 'params', 'info' => 'The page parameter cannot be used together with the text and title parameters' ),
+                       array( 'code' => 'missingrev', 'info' => 'There is no revision ID oldid' ),
+                       array( 'code' => 'permissiondenied', 'info' => 'You don\'t have permission to view deleted revisions' ),
+                       array( 'code' => 'missingtitle', 'info' => 'The page you specified doesn\'t exist' ),
+                       array( 'code' => 'nosuchsection', 'info' => 'There is no section sectionnumber in page' ),
+                       array( 'nosuchpageid' ),
+               ) );
+       }
+
        protected function getExamples() {
-               return array (
+               return array(
                        'api.php?action=parse&text={{Project:Sandbox}}'
                );
        }
@@ -178,4 +585,3 @@ class ApiParse extends ApiBase {
                return __CLASS__ . ': $Id$';
        }
 }
-