includes/api/ApiParse.php

   1 <?php
   2
   3 /*
   4  * Created on Dec 01, 2007
   5  *
   6  * API for MediaWiki 1.8+
   7  *
   8  * Copyright (C) 2007 Yuri Astrakhan <Firstname><Lastname>@gmail.com
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  23  * http://www.gnu.org/copyleft/gpl.html
  24  */
  25
  26 if ( !defined( 'MEDIAWIKI' ) ) {
  27         // Eclipse helper - will be ignored in production
  28         require_once ( "ApiBase.php" );
  29 }
  30
  31 /**
  32  * @ingroup API
  33  */
  34 class ApiParse extends ApiBase {
  35
  36         public function __construct( $main, $action ) {
  37                 parent :: __construct( $main, $action );
  38         }
  39
  40         public function execute() {
  41                 // Get parameters
  42                 $params = $this->extractRequestParams();
  43                 $text = $params['text'];
  44                 $title = $params['title'];
  45                 $page = $params['page'];
  46                 $oldid = $params['oldid'];
  47                 if ( !is_null( $page ) && ( !is_null( $text ) || $title != "API" ) )
  48                         $this->dieUsage( "The page parameter cannot be used together with the text and title parameters", 'params' );
  49                 $prop = array_flip( $params['prop'] );
  50                 $revid = false;
  51
  52                 // The parser needs $wgTitle to be set, apparently the
  53                 // $title parameter in Parser::parse isn't enough *sigh*
  54                 global $wgParser, $wgUser, $wgTitle, $wgEnableParserCache;
  55                 $popts = new ParserOptions();
  56                 $popts->setTidy( true );
  57                 $popts->enableLimitReport();
  58                 $redirValues = null;
  59                 if ( !is_null( $oldid ) || !is_null( $page ) )
  60                 {
  61                         if ( !is_null( $oldid ) )
  62                         {
  63                                 # Don't use the parser cache
  64                                 $rev = Revision::newFromID( $oldid );
  65                                 if ( !$rev )
  66                                         $this->dieUsage( "There is no revision ID $oldid", 'missingrev' );
  67                                 if ( !$rev->userCan( Revision::DELETED_TEXT ) )
  68                                         $this->dieUsage( "You don't have permission to view deleted revisions", 'permissiondenied' );
  69                                 $text = $rev->getText( Revision::FOR_THIS_USER );
  70                                 $titleObj = $rev->getTitle();
  71                                 $wgTitle = $titleObj;
  72                                 $p_result = $wgParser->parse( $text, $titleObj, $popts );
  73                         }
  74                         else
  75                         {
  76                                 if ( $params['redirects'] )
  77                                 {
  78                                         $req = new FauxRequest( array(
  79                                                 'action' => 'query',
  80                                                 'redirects' => '',
  81                                                 'titles' => $page
  82                                         ) );
  83                                         $main = new ApiMain( $req );
  84                                         $main->execute();
  85                                         $data = $main->getResultData();
  86                                         $redirValues = @$data['query']['redirects'];
  87                                         $to = $page;
  88                                         foreach ( (array)$redirValues as $r )
  89                                                 $to = $r['to'];
  90                                 }
  91                                 else
  92                                         $to = $page;
  93                                 $titleObj = Title::newFromText( $to );
  94                                 if ( !$titleObj )
  95                                         $this->dieUsage( "The page you specified doesn't exist", 'missingtitle' );
  96
  97                                 $articleObj = new Article( $titleObj );
  98                                 if ( isset( $prop['revid'] ) )
  99                                         $oldid = $articleObj->getRevIdFetched();
 100                                 // Try the parser cache first
 101                                 $p_result = false;
 102                                 $pcache = ParserCache::singleton();
 103                                 if ( $wgEnableParserCache )
 104                                         $p_result = $pcache->get( $articleObj, $wgUser );
 105                                 if ( !$p_result )
 106                                 {
 107                                         $p_result = $wgParser->parse( $articleObj->getContent(), $titleObj, $popts );
 108
 109                                         if ( $wgEnableParserCache )
 110                                                 $pcache->save( $p_result, $articleObj, $popts );
 111                                 }
 112                         }
 113                 }
 114                 else
 115                 {
 116                         $titleObj = Title::newFromText( $title );
 117                         if ( !$titleObj )
 118                                 $titleObj = Title::newFromText( "API" );
 119                         $wgTitle = $titleObj;
 120                         if ( $params['pst'] || $params['onlypst'] )
 121                                 $text = $wgParser->preSaveTransform( $text, $titleObj, $wgUser, $popts );
 122                         if ( $params['onlypst'] )
 123                         {
 124                                 // Build a result and bail out
 125                                 $result_array['text'] = array();
 126                                 $this->getResult()->setContent( $result_array['text'], $text );
 127                                 $this->getResult()->addValue( null, $this->getModuleName(), $result_array );
 128                                 return;
 129                         }
 130                         $p_result = $wgParser->parse( $text, $titleObj, $popts );
 131                 }
 132
 133                 // Return result
 134                 $result = $this->getResult();
 135                 $result_array = array();
 136                 if ( $params['redirects'] && !is_null( $redirValues ) )
 137                         $result_array['redirects'] = $redirValues;
 138                 if ( isset( $prop['text'] ) ) {
 139                         $result_array['text'] = array();
 140                         $result->setContent( $result_array['text'], $p_result->getText() );
 141                 }
 142                 if ( isset( $prop['langlinks'] ) )
 143                         $result_array['langlinks'] = $this->formatLangLinks( $p_result->getLanguageLinks() );
 144                 if ( isset( $prop['categories'] ) )
 145                         $result_array['categories'] = $this->formatCategoryLinks( $p_result->getCategories() );
 146                 if ( isset( $prop['links'] ) )
 147                         $result_array['links'] = $this->formatLinks( $p_result->getLinks() );
 148                 if ( isset( $prop['templates'] ) )
 149                         $result_array['templates'] = $this->formatLinks( $p_result->getTemplates() );
 150                 if ( isset( $prop['images'] ) )
 151                         $result_array['images'] = array_keys( $p_result->getImages() );
 152                 if ( isset( $prop['externallinks'] ) )
 153                         $result_array['externallinks'] = array_keys( $p_result->getExternalLinks() );
 154                 if ( isset( $prop['sections'] ) )
 155                         $result_array['sections'] = $p_result->getSections();
 156                 if ( isset( $prop['displaytitle'] ) )
 157                         $result_array['displaytitle'] = $p_result->getDisplayTitle() ?
 158                                                         $p_result->getDisplayTitle() :
 159                                                         $titleObj->getPrefixedText();
 160                 if ( !is_null( $oldid ) )
 161                         $result_array['revid'] = intval( $oldid );
 162
 163                 $result_mapping = array(
 164                         'redirects' => 'r',
 165                         'langlinks' => 'll',
 166                         'categories' => 'cl',
 167                         'links' => 'pl',
 168                         'templates' => 'tl',
 169                         'images' => 'img',
 170                         'externallinks' => 'el',
 171                         'sections' => 's',
 172                 );
 173                 $this->setIndexedTagNames( $result_array, $result_mapping );
 174                 $result->addValue( null, $this->getModuleName(), $result_array );
 175         }
 176
 177         private function formatLangLinks( $links ) {
 178                 $result = array();
 179                 foreach ( $links as $link ) {
 180                         $entry = array();
 181                         $bits = explode( ':', $link, 2 );
 182                         $entry['lang'] = $bits[0];
 183                         $this->getResult()->setContent( $entry, $bits[1] );
 184                         $result[] = $entry;
 185                 }
 186                 return $result;
 187         }
 188
 189         private function formatCategoryLinks( $links ) {
 190                 $result = array();
 191                 foreach ( $links as $link => $sortkey ) {
 192                         $entry = array();
 193                         $entry['sortkey'] = $sortkey;
 194                         $this->getResult()->setContent( $entry, $link );
 195                         $result[] = $entry;
 196                 }
 197                 return $result;
 198         }
 199
 200         private function formatLinks( $links ) {
 201                 $result = array();
 202                 foreach ( $links as $ns => $nslinks ) {
 203                         foreach ( $nslinks as $title => $id ) {
 204                                 $entry = array();
 205                                 $entry['ns'] = $ns;
 206                                 $this->getResult()->setContent( $entry, Title::makeTitle( $ns, $title )->getFullText() );
 207                                 if ( $id != 0 )
 208                                         $entry['exists'] = '';
 209                                 $result[] = $entry;
 210                         }
 211                 }
 212                 return $result;
 213         }
 214
 215         private function setIndexedTagNames( &$array, $mapping ) {
 216                 foreach ( $mapping as $key => $name ) {
 217                         if ( isset( $array[$key] ) )
 218                                 $this->getResult()->setIndexedTagName( $array[$key], $name );
 219                 }
 220         }
 221
 222         public function getAllowedParams() {
 223                 return array (
 224                         'title' => array(
 225                                 ApiBase :: PARAM_DFLT => 'API',
 226                         ),
 227                         'text' => null,
 228                         'page' => null,
 229                         'redirects' => false,
 230                         'oldid' => null,
 231                         'prop' => array(
 232                                 ApiBase :: PARAM_DFLT => 'text|langlinks|categories|links|templates|images|externallinks|sections|revid|displaytitle',
 233                                 ApiBase :: PARAM_ISMULTI => true,
 234                                 ApiBase :: PARAM_TYPE => array(
 235                                         'text',
 236                                         'langlinks',
 237                                         'categories',
 238                                         'links',
 239                                         'templates',
 240                                         'images',
 241                                         'externallinks',
 242                                         'sections',
 243                                         'revid',
 244                                         'displaytitle',
 245                                 )
 246                         ),
 247                         'pst' => false,
 248                         'onlypst' => false,
 249                 );
 250         }
 251
 252         public function getParamDescription() {
 253                 return array (
 254                         'text' => 'Wikitext to parse',
 255                         'redirects' => 'If the page parameter is set to a redirect, resolve it',
 256                         'title' => 'Title of page the text belongs to',
 257                         'page' => 'Parse the content of this page. Cannot be used together with text and title',
 258                         'oldid' => 'Parse the content of this revision. Overrides page',
 259                         'prop' => array( 'Which pieces of information to get.',
 260                                         'NOTE: Section tree is only generated if there are more than 4 sections, or if the __TOC__ keyword is present'
 261                         ),
 262                         'pst' => array( 'Do a pre-save transform on the input before parsing it.',
 263                                         'Ignored if page or oldid is used.'
 264                         ),
 265                         'onlypst' => array( 'Do a PST on the input, but don\'t parse it.',
 266                                         'Returns PSTed wikitext. Ignored if page or oldid is used.'
 267                         ),
 268                 );
 269         }
 270
 271         public function getDescription() {
 272                 return 'This module parses wikitext and returns parser output';
 273         }
 274
 275         protected function getExamples() {
 276                 return array (
 277                         'api.php?action=parse&text={{Project:Sandbox}}'
 278                 );
 279         }
 280
 281         public function getVersion() {
 282                 return __CLASS__ . ': $Id$';
 283         }
 284 }