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                 // The data is hot but user-dependent, like page views, so we set vary cookies
  42                 $this->getMain()->setCacheMode( 'anon-public-user-private' );
  43
  44                 // Get parameters
  45                 $params = $this->extractRequestParams();
  46                 $text = $params['text'];
  47                 $title = $params['title'];
  48                 $page = $params['page'];
  49                 $oldid = $params['oldid'];
  50                 if(!is_null($page) && (!is_null($text) || $title != "API"))
  51                         $this->dieUsage("The page parameter cannot be used together with the text and title parameters", 'params');
  52                 $prop = array_flip($params['prop']);
  53                 $revid = false;
  54
  55                 // The parser needs $wgTitle to be set, apparently the
  56                 // $title parameter in Parser::parse isn't enough *sigh*
  57                 global $wgParser, $wgUser, $wgTitle;
  58                 $popts = new ParserOptions();
  59                 $popts->setTidy(true);
  60                 $popts->enableLimitReport();
  61                 $redirValues = null;
  62                 if(!is_null($oldid) || !is_null($page))
  63                 {
  64                         if(!is_null($oldid))
  65                         {
  66                                 # Don't use the parser cache
  67                                 $rev = Revision::newFromID($oldid);
  68                                 if(!$rev)
  69                                         $this->dieUsage("There is no revision ID $oldid", 'missingrev');
  70                                 if(!$rev->userCan(Revision::DELETED_TEXT))
  71                                         $this->dieUsage("You don't have permission to view deleted revisions", 'permissiondenied');
  72                                 $text = $rev->getText( Revision::FOR_THIS_USER );
  73                                 $titleObj = $rev->getTitle();
  74                                 $wgTitle = $titleObj;
  75                                 $p_result = $wgParser->parse($text, $titleObj, $popts);
  76                         }
  77                         else
  78                         {
  79                                 if($params['redirects'])
  80                                 {
  81                                         $req = new FauxRequest(array(
  82                                                 'action' => 'query',
  83                                                 'redirects' => '',
  84                                                 'titles' => $page
  85                                         ));
  86                                         $main = new ApiMain($req);
  87                                         $main->execute();
  88                                         $data = $main->getResultData();
  89                                         $redirValues = @$data['query']['redirects'];
  90                                         $to = $page;
  91                                         foreach((array)$redirValues as $r)
  92                                                 $to = $r['to'];
  93                                 }
  94                                 else
  95                                         $to = $page;
  96                                 $titleObj = Title::newFromText($to);
  97                                 if(!$titleObj)
  98                                         $this->dieUsage("The page you specified doesn't exist", 'missingtitle');
  99
 100                                 $articleObj = new Article($titleObj);
 101                                 if(isset($prop['revid']))
 102                                         $oldid = $articleObj->getRevIdFetched();
 103                                 // Try the parser cache first
 104                                 $pcache = ParserCache::singleton();
 105                                 $p_result = $pcache->get($articleObj, $wgUser);
 106                                 if(!$p_result)
 107                                 {
 108                                         $p_result = $wgParser->parse($articleObj->getContent(), $titleObj, $popts);
 109                                         global $wgUseParserCache;
 110                                         if($wgUseParserCache)
 111                                                 $pcache->save($p_result, $articleObj, $popts);
 112                                 }
 113                         }
 114                 }
 115                 else
 116                 {
 117                         $titleObj = Title::newFromText($title);
 118                         if(!$titleObj)
 119                                 $titleObj = Title::newFromText("API");
 120                         $wgTitle = $titleObj;
 121                         if($params['pst'] || $params['onlypst'])
 122                                 $text = $wgParser->preSaveTransform($text, $titleObj, $wgUser, $popts);
 123                         if($params['onlypst'])
 124                         {
 125                                 // Build a result and bail out
 126                                 $result_array['text'] = array();
 127                                 $this->getResult()->setContent($result_array['text'], $text);
 128                                 $this->getResult()->addValue(null, $this->getModuleName(), $result_array);
 129                                 return;
 130                         }
 131                         $p_result = $wgParser->parse($text, $titleObj, $popts);
 132                 }
 133
 134                 // Return result
 135                 $result = $this->getResult();
 136                 $result_array = array();
 137                 if($params['redirects'] && !is_null($redirValues))
 138                         $result_array['redirects'] = $redirValues;
 139                 if(isset($prop['text'])) {
 140                         $result_array['text'] = array();
 141                         $result->setContent($result_array['text'], $p_result->getText());
 142                 }
 143                 if(isset($prop['langlinks']))
 144                         $result_array['langlinks'] = $this->formatLangLinks($p_result->getLanguageLinks());
 145                 if(isset($prop['categories']))
 146                         $result_array['categories'] = $this->formatCategoryLinks($p_result->getCategories());
 147                 if(isset($prop['links']))
 148                         $result_array['links'] = $this->formatLinks($p_result->getLinks());
 149                 if(isset($prop['templates']))
 150                         $result_array['templates'] = $this->formatLinks($p_result->getTemplates());
 151                 if(isset($prop['images']))
 152                         $result_array['images'] = array_keys($p_result->getImages());
 153                 if(isset($prop['externallinks']))
 154                         $result_array['externallinks'] = array_keys($p_result->getExternalLinks());
 155                 if(isset($prop['sections']))
 156                         $result_array['sections'] = $p_result->getSections();
 157                 if(isset($prop['displaytitle']))
 158                         $result_array['displaytitle'] = $p_result->getDisplayTitle() ?
 159                                                         $p_result->getDisplayTitle() :
 160                                                         $titleObj->getPrefixedText();
 161                 if(!is_null($oldid))
 162                         $result_array['revid'] = intval($oldid);
 163
 164                 $result_mapping = array(
 165                         'redirects' => 'r',
 166                         'langlinks' => 'll',
 167                         'categories' => 'cl',
 168                         'links' => 'pl',
 169                         'templates' => 'tl',
 170                         'images' => 'img',
 171                         'externallinks' => 'el',
 172                         'sections' => 's',
 173                 );
 174                 $this->setIndexedTagNames( $result_array, $result_mapping );
 175                 $result->addValue( null, $this->getModuleName(), $result_array );
 176         }
 177
 178         private function formatLangLinks( $links ) {
 179                 $result = array();
 180                 foreach( $links as $link ) {
 181                         $entry = array();
 182                         $bits = split( ':', $link, 2 );
 183                         $entry['lang'] = $bits[0];
 184                         $this->getResult()->setContent( $entry, $bits[1] );
 185                         $result[] = $entry;
 186                 }
 187                 return $result;
 188         }
 189
 190         private function formatCategoryLinks( $links ) {
 191                 $result = array();
 192                 foreach( $links as $link => $sortkey ) {
 193                         $entry = array();
 194                         $entry['sortkey'] = $sortkey;
 195                         $this->getResult()->setContent( $entry, $link );
 196                         $result[] = $entry;
 197                 }
 198                 return $result;
 199         }
 200
 201         private function formatLinks( $links ) {
 202                 $result = array();
 203                 foreach( $links as $ns => $nslinks ) {
 204                         foreach( $nslinks as $title => $id ) {
 205                                 $entry = array();
 206                                 $entry['ns'] = $ns;
 207                                 $this->getResult()->setContent( $entry, Title::makeTitle( $ns, $title )->getFullText() );
 208                                 if( $id != 0 )
 209                                         $entry['exists'] = '';
 210                                 $result[] = $entry;
 211                         }
 212                 }
 213                 return $result;
 214         }
 215
 216         private function setIndexedTagNames( &$array, $mapping ) {
 217                 foreach( $mapping as $key => $name ) {
 218                         if( isset( $array[$key] ) )
 219                                 $this->getResult()->setIndexedTagName( $array[$key], $name );
 220                 }
 221         }
 222
 223         public function getAllowedParams() {
 224                 return array (
 225                         'title' => array(
 226                                 ApiBase :: PARAM_DFLT => 'API',
 227                         ),
 228                         'text' => null,
 229                         'page' => null,
 230                         'redirects' => false,
 231                         'oldid' => null,
 232                         'prop' => array(
 233                                 ApiBase :: PARAM_DFLT => 'text|langlinks|categories|links|templates|images|externallinks|sections|revid|displaytitle',
 234                                 ApiBase :: PARAM_ISMULTI => true,
 235                                 ApiBase :: PARAM_TYPE => array(
 236                                         'text',
 237                                         'langlinks',
 238                                         'categories',
 239                                         'links',
 240                                         'templates',
 241                                         'images',
 242                                         'externallinks',
 243                                         'sections',
 244                                         'revid',
 245                                         'displaytitle',
 246                                 )
 247                         ),
 248                         'pst' => false,
 249                         'onlypst' => false,
 250                 );
 251         }
 252
 253         public function getParamDescription() {
 254                 return array (
 255                         'text' => 'Wikitext to parse',
 256                         'redirects' => 'If the page parameter is set to a redirect, resolve it',
 257                         'title' => 'Title of page the text belongs to',
 258                         'page' => 'Parse the content of this page. Cannot be used together with text and title',
 259                         'oldid' => 'Parse the content of this revision. Overrides page',
 260                         'prop' => array('Which pieces of information to get.',
 261                                         'NOTE: Section tree is only generated if there are more than 4 sections, or if the __TOC__ keyword is present'
 262                         ),
 263                         'pst' => array( 'Do a pre-save transform on the input before parsing it.',
 264                                         'Ignored if page or oldid is used.'
 265                         ),
 266                         'onlypst' => array('Do a PST on the input, but don\'t parse it.',
 267                                         'Returns PSTed wikitext. Ignored if page or oldid is used.'
 268                         ),
 269                 );
 270         }
 271
 272         public function getDescription() {
 273                 return 'This module parses wikitext and returns parser output';
 274         }
 275
 276         protected function getExamples() {
 277                 return array (
 278                         'api.php?action=parse&text={{Project:Sandbox}}'
 279                 );
 280         }
 281
 282         public function getVersion() {
 283                 return __CLASS__ . ': $Id: ApiParse.php 69986 2010-07-27 03:57:39Z tstarling $';
 284         }
 285 }