includes/api/ApiExpandTemplates.php

   1 <?php
   2 /**
   3  *
   4  *
   5  * Created on Oct 05, 2007
   6  *
   7  * Copyright © 2007 Yuri Astrakhan "<Firstname><Lastname>@gmail.com"
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 /**
  28  * API module that functions as a shortcut to the wikitext preprocessor. Expands
  29  * any templates in a provided string, and returns the result of this expansion
  30  * to the caller.
  31  *
  32  * @ingroup API
  33  */
  34 class ApiExpandTemplates extends ApiBase {
  35
  36         public function execute() {
  37                 // Cache may vary on $wgUser because ParserOptions gets data from it
  38                 $this->getMain()->setCacheMode( 'anon-public-user-private' );
  39
  40                 // Get parameters
  41                 $params = $this->extractRequestParams();
  42                 $this->requireMaxOneParameter( $params, 'prop', 'generatexml' );
  43
  44                 if ( $params['prop'] === null ) {
  45                         $this->setWarning( 'Because no values have been specified for the prop parameter, a legacy format has been used for the output.'
  46                                  . ' This format is deprecated, and in the future, a default value will be set for the prop parameter, causing the new format to always be used.' );
  47                         $prop = array();
  48                 } else {
  49                         $prop = array_flip( $params['prop'] );
  50                 }
  51
  52                 // Create title for parser
  53                 $title_obj = Title::newFromText( $params['title'] );
  54                 if ( !$title_obj || $title_obj->isExternal() ) {
  55                         $this->dieUsageMsg( array( 'invalidtitle', $params['title'] ) );
  56                 }
  57
  58                 $result = $this->getResult();
  59
  60                 // Parse text
  61                 global $wgParser;
  62                 $options = ParserOptions::newFromContext( $this->getContext() );
  63
  64                 if ( $params['includecomments'] ) {
  65                         $options->setRemoveComments( false );
  66                 }
  67
  68                 $retval = array();
  69
  70                 if ( isset( $prop['parsetree'] ) || $params['generatexml'] ) {
  71                         $wgParser->startExternalParse( $title_obj, $options, OT_PREPROCESS );
  72                         $dom = $wgParser->preprocessToDom( $params['text'] );
  73                         if ( is_callable( array( $dom, 'saveXML' ) ) ) {
  74                                 $xml = $dom->saveXML();
  75                         } else {
  76                                 $xml = $dom->__toString();
  77                         }
  78                         if ( isset( $prop['parsetree'] ) ) {
  79                                 unset( $prop['parsetree'] );
  80                                 $retval['parsetree'] = $xml;
  81                         } else {
  82                                 // the old way
  83                                 $xml_result = array();
  84                                 ApiResult::setContent( $xml_result, $xml );
  85                                 $result->addValue( null, 'parsetree', $xml_result );
  86                         }
  87                 }
  88
  89                 // if they didn't want any output except (probably) the parse tree,
  90                 // then don't bother actually fully expanding it
  91                 if ( $prop || $params['prop'] === null ) {
  92                         $frame = $wgParser->getPreprocessor()->newFrame();
  93                         $wikitext = $wgParser->preprocess( $params['text'], $title_obj, $options, null, $frame );
  94                         if ( $params['prop'] === null ) {
  95                                 // the old way
  96                                 ApiResult::setContent( $retval, $wikitext );
  97                         } else {
  98                                 if ( isset( $prop['categories'] ) ) {
  99                                         $categories = $wgParser->getOutput()->getCategories();
 100                                         if ( !empty( $categories ) ) {
 101                                                 $categories_result = array();
 102                                                 foreach ( $categories as $category => $sortkey ) {
 103                                                         $entry = array();
 104                                                         $entry['sortkey'] = $sortkey;
 105                                                         ApiResult::setContent( $entry, $category );
 106                                                         $categories_result[] = $entry;
 107                                                 }
 108                                                 $result->setIndexedTagName( $categories_result, 'category' );
 109                                                 $retval['categories'] = $categories_result;
 110                                         }
 111                                 }
 112                                 if ( isset( $prop['volatile'] ) && $frame->isVolatile() ) {
 113                                         $retval['volatile'] = '';
 114                                 }
 115                                 if ( isset( $prop['ttl'] ) && $frame->getTTL() !== null ) {
 116                                         $retval['ttl'] = $frame->getTTL();
 117                                 }
 118                                 if ( isset( $prop['wikitext'] ) ) {
 119                                         $retval['wikitext'] = $wikitext;
 120                                 }
 121                         }
 122                 }
 123                 $result->setSubelements( $retval, array( 'wikitext', 'parsetree' ) );
 124                 $result->addValue( null, $this->getModuleName(), $retval );
 125         }
 126
 127         public function getAllowedParams() {
 128                 return array(
 129                         'title' => array(
 130                                 ApiBase::PARAM_DFLT => 'API',
 131                         ),
 132                         'text' => array(
 133                                 ApiBase::PARAM_TYPE => 'string',
 134                                 ApiBase::PARAM_REQUIRED => true,
 135                         ),
 136                         'prop' => array(
 137                                 ApiBase::PARAM_TYPE => array(
 138                                         'wikitext',
 139                                         'categories',
 140                                         'volatile',
 141                                         'ttl',
 142                                         'parsetree',
 143                                 ),
 144                                 ApiBase::PARAM_ISMULTI => true,
 145                         ),
 146                         'includecomments' => false,
 147                         'generatexml' => array(
 148                                 ApiBase::PARAM_TYPE => 'boolean',
 149                                 ApiBase::PARAM_DEPRECATED => true,
 150                         ),
 151                 );
 152         }
 153
 154         public function getParamDescription() {
 155                 return array(
 156                         'text' => 'Wikitext to convert',
 157                         'title' => 'Title of page',
 158                         'prop' => array(
 159                                 'Which pieces of information to get',
 160                                 ' wikitext   - The expanded wikitext',
 161                                 ' categories - Any categories present in the input that are not represented in the wikitext output',
 162                                 ' volatile   - Whether the output is volatile and should not be reused elsewhere within the page',
 163                                 ' ttl        - The maximum time after which caches of the result should be invalidated',
 164                                 ' parsetree  - The XML parse tree of the input',
 165                                 'Note that if no values are selected, the result will contain the wikitext,',
 166                                 'but the output will be in a deprecated format.',
 167                         ),
 168                         'includecomments' => 'Whether to include HTML comments in the output',
 169                         'generatexml' => 'Generate XML parse tree (replaced by prop=parsetree)',
 170                 );
 171         }
 172
 173         public function getResultProperties() {
 174                 return array(
 175                         'wikitext' => array(
 176                                 'wikitext' => 'string',
 177                         ),
 178                         'categories' => array(
 179                                 'categories' => array(
 180                                         ApiBase::PROP_TYPE => 'array',
 181                                         ApiBase::PROP_NULLABLE => true,
 182                                 ),
 183                         ),
 184                         'volatile' => array(
 185                                 'volatile' => array(
 186                                         ApiBase::PROP_TYPE => 'boolean',
 187                                         ApiBase::PROP_NULLABLE => true,
 188                                 ),
 189                         ),
 190                         'ttl' => array(
 191                                 'ttl' => array(
 192                                         ApiBase::PROP_TYPE => 'integer',
 193                                         ApiBase::PROP_NULLABLE => true,
 194                                 ),
 195                         ),
 196                         'parsetree' => array(
 197                                 'parsetree' => 'string',
 198                         ),
 199                 );
 200         }
 201
 202         public function getDescription() {
 203                 return 'Expands all templates in wikitext.';
 204         }
 205
 206         public function getPossibleErrors() {
 207                 return array_merge( parent::getPossibleErrors(), array(
 208                         array( 'invalidtitle', 'title' ),
 209                 ) );
 210         }
 211
 212         public function getExamples() {
 213                 return array(
 214                         'api.php?action=expandtemplates&text={{Project:Sandbox}}'
 215                 );
 216         }
 217
 218         public function getHelpUrls() {
 219                 return 'https://www.mediawiki.org/wiki/API:Parsing_wikitext#expandtemplates';
 220         }
 221 }