includes/api/ApiExpandTemplates.php

   1 <?php
   2 /**
   3  * Copyright © 2007 Yuri Astrakhan "<Firstname><Lastname>@gmail.com"
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 use MediaWiki\MediaWikiServices;
  24
  25 /**
  26  * API module that functions as a shortcut to the wikitext preprocessor. Expands
  27  * any templates in a provided string, and returns the result of this expansion
  28  * to the caller.
  29  *
  30  * @ingroup API
  31  */
  32 class ApiExpandTemplates extends ApiBase {
  33
  34         public function execute() {
  35                 // Cache may vary on the user because ParserOptions gets data from it
  36                 $this->getMain()->setCacheMode( 'anon-public-user-private' );
  37
  38                 // Get parameters
  39                 $params = $this->extractRequestParams();
  40                 $this->requireMaxOneParameter( $params, 'prop', 'generatexml' );
  41
  42                 $title = $params['title'];
  43                 if ( $title === null ) {
  44                         $titleProvided = false;
  45                         // A title is needed for parsing, so arbitrarily choose one
  46                         $title = 'API';
  47                 } else {
  48                         $titleProvided = true;
  49                 }
  50
  51                 if ( $params['prop'] === null ) {
  52                         $this->addDeprecation(
  53                                 [ 'apiwarn-deprecation-missingparam', 'prop' ], 'action=expandtemplates&!prop'
  54                         );
  55                         $prop = [];
  56                 } else {
  57                         $prop = array_flip( $params['prop'] );
  58                 }
  59
  60                 $titleObj = Title::newFromText( $title );
  61                 if ( !$titleObj || $titleObj->isExternal() ) {
  62                         $this->dieWithError( [ 'apierror-invalidtitle', wfEscapeWikiText( $params['title'] ) ] );
  63                 }
  64
  65                 // Get title and revision ID for parser
  66                 $revid = $params['revid'];
  67                 if ( $revid !== null ) {
  68                         $rev = MediaWikiServices::getInstance()->getRevisionStore()->getRevisionById( $revid );
  69                         if ( !$rev ) {
  70                                 $this->dieWithError( [ 'apierror-nosuchrevid', $revid ] );
  71                         }
  72                         $pTitleObj = $titleObj;
  73                         $titleObj = Title::newFromLinkTarget( $rev->getPageAsLinkTarget() );
  74                         if ( $titleProvided ) {
  75                                 if ( !$titleObj->equals( $pTitleObj ) ) {
  76                                         $this->addWarning( [ 'apierror-revwrongpage', $rev->getId(),
  77                                                 wfEscapeWikiText( $pTitleObj->getPrefixedText() ) ] );
  78                                 }
  79                         } else {
  80                                 // Consider the title derived from the revid as having
  81                                 // been provided.
  82                                 $titleProvided = true;
  83                         }
  84                 }
  85
  86                 $result = $this->getResult();
  87
  88                 // Parse text
  89                 $options = ParserOptions::newFromContext( $this->getContext() );
  90
  91                 if ( $params['includecomments'] ) {
  92                         $options->setRemoveComments( false );
  93                 }
  94
  95                 $reset = null;
  96                 $suppressCache = false;
  97                 Hooks::run( 'ApiMakeParserOptions',
  98                         [ $options, $titleObj, $params, $this, &$reset, &$suppressCache ] );
  99
 100                 $retval = [];
 101
 102                 $parser = MediaWikiServices::getInstance()->getParser();
 103                 if ( isset( $prop['parsetree'] ) || $params['generatexml'] ) {
 104                         $parser->startExternalParse( $titleObj, $options, Parser::OT_PREPROCESS );
 105                         $dom = $parser->preprocessToDom( $params['text'] );
 106                         if ( is_callable( [ $dom, 'saveXML' ] ) ) {
 107                                 // @phan-suppress-next-line PhanUndeclaredMethod
 108                                 $xml = $dom->saveXML();
 109                         } else {
 110                                 // @phan-suppress-next-line PhanUndeclaredMethod
 111                                 $xml = $dom->__toString();
 112                         }
 113                         if ( isset( $prop['parsetree'] ) ) {
 114                                 unset( $prop['parsetree'] );
 115                                 $retval['parsetree'] = $xml;
 116                         } else {
 117                                 // the old way
 118                                 $result->addValue( null, 'parsetree', $xml );
 119                                 $result->addValue( null, ApiResult::META_BC_SUBELEMENTS, [ 'parsetree' ] );
 120                         }
 121                 }
 122
 123                 // if they didn't want any output except (probably) the parse tree,
 124                 // then don't bother actually fully expanding it
 125                 if ( $prop || $params['prop'] === null ) {
 126                         $parser->startExternalParse( $titleObj, $options, Parser::OT_PREPROCESS );
 127                         $frame = $parser->getPreprocessor()->newFrame();
 128                         $wikitext = $parser->preprocess( $params['text'], $titleObj, $options, $revid, $frame );
 129                         if ( $params['prop'] === null ) {
 130                                 // the old way
 131                                 ApiResult::setContentValue( $retval, 'wikitext', $wikitext );
 132                         } else {
 133                                 $p_output = $parser->getOutput();
 134                                 if ( isset( $prop['categories'] ) ) {
 135                                         $categories = $p_output->getCategories();
 136                                         if ( $categories ) {
 137                                                 $categories_result = [];
 138                                                 foreach ( $categories as $category => $sortkey ) {
 139                                                         $entry = [];
 140                                                         $entry['sortkey'] = $sortkey;
 141                                                         ApiResult::setContentValue( $entry, 'category', (string)$category );
 142                                                         $categories_result[] = $entry;
 143                                                 }
 144                                                 ApiResult::setIndexedTagName( $categories_result, 'category' );
 145                                                 $retval['categories'] = $categories_result;
 146                                         }
 147                                 }
 148                                 if ( isset( $prop['properties'] ) ) {
 149                                         $properties = $p_output->getProperties();
 150                                         if ( $properties ) {
 151                                                 ApiResult::setArrayType( $properties, 'BCkvp', 'name' );
 152                                                 ApiResult::setIndexedTagName( $properties, 'property' );
 153                                                 $retval['properties'] = $properties;
 154                                         }
 155                                 }
 156                                 if ( isset( $prop['volatile'] ) ) {
 157                                         $retval['volatile'] = $frame->isVolatile();
 158                                 }
 159                                 if ( isset( $prop['ttl'] ) && $frame->getTTL() !== null ) {
 160                                         $retval['ttl'] = $frame->getTTL();
 161                                 }
 162                                 if ( isset( $prop['wikitext'] ) ) {
 163                                         $retval['wikitext'] = $wikitext;
 164                                 }
 165                                 if ( isset( $prop['modules'] ) ) {
 166                                         $retval['modules'] = array_values( array_unique( $p_output->getModules() ) );
 167                                         // Deprecated since 1.32 (T188689)
 168                                         $retval['modulescripts'] = [];
 169                                         $retval['modulestyles'] = array_values( array_unique( $p_output->getModuleStyles() ) );
 170                                 }
 171                                 if ( isset( $prop['jsconfigvars'] ) ) {
 172                                         $retval['jsconfigvars'] =
 173                                                 ApiResult::addMetadataToResultVars( $p_output->getJsConfigVars() );
 174                                 }
 175                                 if ( isset( $prop['encodedjsconfigvars'] ) ) {
 176                                         $retval['encodedjsconfigvars'] = FormatJson::encode(
 177                                                 $p_output->getJsConfigVars(), false, FormatJson::ALL_OK
 178                                         );
 179                                         $retval[ApiResult::META_SUBELEMENTS][] = 'encodedjsconfigvars';
 180                                 }
 181                                 if ( isset( $prop['modules'] ) &&
 182                                         !isset( $prop['jsconfigvars'] ) && !isset( $prop['encodedjsconfigvars'] ) ) {
 183                                         $this->addWarning( 'apiwarn-moduleswithoutvars' );
 184                                 }
 185                         }
 186                 }
 187                 ApiResult::setSubelementsList( $retval, [ 'wikitext', 'parsetree' ] );
 188                 $result->addValue( null, $this->getModuleName(), $retval );
 189         }
 190
 191         public function getAllowedParams() {
 192                 return [
 193                         'title' => null,
 194                         'text' => [
 195                                 ApiBase::PARAM_TYPE => 'text',
 196                                 ApiBase::PARAM_REQUIRED => true,
 197                         ],
 198                         'revid' => [
 199                                 ApiBase::PARAM_TYPE => 'integer',
 200                         ],
 201                         'prop' => [
 202                                 ApiBase::PARAM_TYPE => [
 203                                         'wikitext',
 204                                         'categories',
 205                                         'properties',
 206                                         'volatile',
 207                                         'ttl',
 208                                         'modules',
 209                                         'jsconfigvars',
 210                                         'encodedjsconfigvars',
 211                                         'parsetree',
 212                                 ],
 213                                 ApiBase::PARAM_ISMULTI => true,
 214                                 ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
 215                         ],
 216                         'includecomments' => false,
 217                         'generatexml' => [
 218                                 ApiBase::PARAM_TYPE => 'boolean',
 219                                 ApiBase::PARAM_DEPRECATED => true,
 220                         ],
 221                 ];
 222         }
 223
 224         protected function getExamplesMessages() {
 225                 return [
 226                         'action=expandtemplates&text={{Project:Sandbox}}'
 227                                 => 'apihelp-expandtemplates-example-simple',
 228                 ];
 229         }
 230
 231         public function getHelpUrls() {
 232                 return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Parsing_wikitext#expandtemplates';
 233         }
 234 }