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;
  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                                 $pcache = ParserCache::singleton();
 102                                 $p_result = $pcache->get($articleObj, $wgUser);
 103                                 if(!$p_result)
 104                                 {
 105                                         $p_result = $wgParser->parse($articleObj->getContent(), $titleObj, $popts);
 106                                         global $wgUseParserCache;
 107                                         if($wgUseParserCache)
 108                                                 $pcache->save($p_result, $articleObj, $wgUser);
 109                                 }
 110                         }
 111                 }
 112                 else
 113                 {
 114                         $titleObj = Title::newFromText($title);
 115                         if(!$titleObj)
 116                                 $titleObj = Title::newFromText("API");
 117                         $wgTitle = $titleObj;
 118                         if($params['pst'] || $params['onlypst'])
 119                                 $text = $wgParser->preSaveTransform($text, $titleObj, $wgUser, $popts);
 120                         if($params['onlypst'])
 121                         {
 122                                 // Build a result and bail out
 123                                 $result_array['text'] = array();
 124                                 $this->getResult()->setContent($result_array['text'], $text);
 125                                 $this->getResult()->addValue(null, $this->getModuleName(), $result_array);
 126                                 return;
 127                         }
 128                         $p_result = $wgParser->parse($text, $titleObj, $popts);
 129                 }
 130
 131                 // Return result
 132                 $result = $this->getResult();
 133                 $result_array = array();
 134                 if($params['redirects'] && !is_null($redirValues))
 135                         $result_array['redirects'] = $redirValues;
 136                 if(isset($prop['text'])) {
 137                         $result_array['text'] = array();
 138                         $result->setContent($result_array['text'], $p_result->getText());
 139                 }
 140                 if(isset($prop['langlinks']))
 141                         $result_array['langlinks'] = $this->formatLangLinks($p_result->getLanguageLinks());
 142                 if(isset($prop['categories']))
 143                         $result_array['categories'] = $this->formatCategoryLinks($p_result->getCategories());
 144                 if(isset($prop['links']))
 145                         $result_array['links'] = $this->formatLinks($p_result->getLinks());
 146                 if(isset($prop['templates']))
 147                         $result_array['templates'] = $this->formatLinks($p_result->getTemplates());
 148                 if(isset($prop['images']))
 149                         $result_array['images'] = array_keys($p_result->getImages());
 150                 if(isset($prop['externallinks']))
 151                         $result_array['externallinks'] = array_keys($p_result->getExternalLinks());
 152                 if(isset($prop['sections']))
 153                         $result_array['sections'] = $p_result->getSections();
 154                 if(isset($prop['displaytitle']))
 155                         $result_array['displaytitle'] = $p_result->getDisplayTitle() ?
 156                                                         $p_result->getDisplayTitle() :
 157                                                         $titleObj->getPrefixedText();
 158                 if(!is_null($oldid))
 159                         $result_array['revid'] = $oldid;
 160
 161                 $result_mapping = array(
 162                         'redirects' => 'r',
 163                         'langlinks' => 'll',
 164                         'categories' => 'cl',
 165                         'links' => 'pl',
 166                         'templates' => 'tl',
 167                         'images' => 'img',
 168                         'externallinks' => 'el',
 169                         'sections' => 's',
 170                 );
 171                 $this->setIndexedTagNames( $result_array, $result_mapping );
 172                 $result->addValue( null, $this->getModuleName(), $result_array );
 173         }
 174
 175         private function formatLangLinks( $links ) {
 176                 $result = array();
 177                 foreach( $links as $link ) {
 178                         $entry = array();
 179                         $bits = split( ':', $link, 2 );
 180                         $entry['lang'] = $bits[0];
 181                         $this->getResult()->setContent( $entry, $bits[1] );
 182                         $result[] = $entry;
 183                 }
 184                 return $result;
 185         }
 186
 187         private function formatCategoryLinks( $links ) {
 188                 $result = array();
 189                 foreach( $links as $link => $sortkey ) {
 190                         $entry = array();
 191                         $entry['sortkey'] = $sortkey;
 192                         $this->getResult()->setContent( $entry, $link );
 193                         $result[] = $entry;
 194                 }
 195                 return $result;
 196         }
 197
 198         private function formatLinks( $links ) {
 199                 $result = array();
 200                 foreach( $links as $ns => $nslinks ) {
 201                         foreach( $nslinks as $title => $id ) {
 202                                 $entry = array();
 203                                 $entry['ns'] = $ns;
 204                                 $this->getResult()->setContent( $entry, Title::makeTitle( $ns, $title )->getFullText() );
 205                                 if( $id != 0 )
 206                                         $entry['exists'] = '';
 207                                 $result[] = $entry;
 208                         }
 209                 }
 210                 return $result;
 211         }
 212
 213         private function setIndexedTagNames( &$array, $mapping ) {
 214                 foreach( $mapping as $key => $name ) {
 215                         if( isset( $array[$key] ) )
 216                                 $this->getResult()->setIndexedTagName( $array[$key], $name );
 217                 }
 218         }
 219
 220         public function getAllowedParams() {
 221                 return array (
 222                         'title' => array(
 223                                 ApiBase :: PARAM_DFLT => 'API',
 224                         ),
 225                         'text' => null,
 226                         'page' => null,
 227                         'redirects' => false,
 228                         'oldid' => null,
 229                         'prop' => array(
 230                                 ApiBase :: PARAM_DFLT => 'text|langlinks|categories|links|templates|images|externallinks|sections|revid|displaytitle',
 231                                 ApiBase :: PARAM_ISMULTI => true,
 232                                 ApiBase :: PARAM_TYPE => array(
 233                                         'text',
 234                                         'langlinks',
 235                                         'categories',
 236                                         'links',
 237                                         'templates',
 238                                         'images',
 239                                         'externallinks',
 240                                         'sections',
 241                                         'revid',
 242                                         'displaytitle',
 243                                 )
 244                         ),
 245                         'pst' => false,
 246                         'onlypst' => false,
 247                 );
 248         }
 249
 250         public function getParamDescription() {
 251                 return array (
 252                         'text' => 'Wikitext to parse',
 253                         'redirects' => 'If the page parameter is set to a redirect, resolve it',
 254                         'title' => 'Title of page the text belongs to',
 255                         'page' => 'Parse the content of this page. Cannot be used together with text and title',
 256                         'oldid' => 'Parse the content of this revision. Overrides page',
 257                         'prop' => array('Which pieces of information to get.',
 258                                         'NOTE: Section tree is only generated if there are more than 4 sections, or if the __TOC__ keyword is present'
 259                         ),
 260                         'pst' => array( 'Do a pre-save transform on the input before parsing it.',
 261                                         'Ignored if page or oldid is used.'
 262                         ),
 263                         'onlypst' => array('Do a PST on the input, but don\'t parse it.',
 264                                         'Returns PSTed wikitext. Ignored if page or oldid is used.'
 265                         ),
 266                 );
 267         }
 268
 269         public function getDescription() {
 270                 return 'This module parses wikitext and returns parser output';
 271         }
 272
 273         protected function getExamples() {
 274                 return array (
 275                         'api.php?action=parse&text={{Project:Sandbox}}'
 276                 );
 277         }
 278
 279         public function getVersion() {
 280                 return __CLASS__ . ': $Id$';
 281         }
 282 }