includes/api/ApiExpandTemplates.php
<?php
/**
* Copyright © 2007 Yuri Astrakhan "<Firstname><Lastname>@gmail.com"
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
use MediaWiki\Json\FormatJson;
use MediaWiki\Parser\Parser;
use MediaWiki\Revision\RevisionStore;
use MediaWiki\Title\Title;
use Wikimedia\ParamValidator\ParamValidator;
/**
* API module that functions as a shortcut to the wikitext preprocessor. Expands
* any templates in a provided string, and returns the result of this expansion
* to the caller.
*
* @ingroup API
*/
class ApiExpandTemplates extends ApiBase {
private RevisionStore $revisionStore;
private ParserFactory $parserFactory;
/**
* @param ApiMain $main
* @param string $action
* @param RevisionStore $revisionStore
* @param ParserFactory $parserFactory
*/
public function __construct(
ApiMain $main,
$action,
RevisionStore $revisionStore,
ParserFactory $parserFactory
) {
parent::__construct( $main, $action );
$this->revisionStore = $revisionStore;
$this->parserFactory = $parserFactory;
}
public function execute() {
// Cache may vary on the user because ParserOptions gets data from it
$this->getMain()->setCacheMode( 'anon-public-user-private' );
// Get parameters
$params = $this->extractRequestParams();
$this->requireMaxOneParameter( $params, 'prop', 'generatexml' );
$title = $params['title'];
if ( $title === null ) {
$titleProvided = false;
// A title is needed for parsing, so arbitrarily choose one
$title = 'API';
} else {
$titleProvided = true;
}
if ( $params['prop'] === null ) {
$this->addDeprecation(
[ 'apiwarn-deprecation-missingparam', 'prop' ], 'action=expandtemplates&!prop'
);
$prop = [];
} else {
$prop = array_fill_keys( $params['prop'], true );
}
$titleObj = Title::newFromText( $title );
if ( !$titleObj || $titleObj->isExternal() ) {
$this->dieWithError( [ 'apierror-invalidtitle', wfEscapeWikiText( $params['title'] ) ] );
}
// Get title and revision ID for parser
$revid = $params['revid'];
if ( $revid !== null ) {
$rev = $this->revisionStore->getRevisionById( $revid );
if ( !$rev ) {
$this->dieWithError( [ 'apierror-nosuchrevid', $revid ] );
}
$pTitleObj = $titleObj;
$titleObj = Title::newFromLinkTarget( $rev->getPageAsLinkTarget() );
if ( $titleProvided && !$titleObj->equals( $pTitleObj ) ) {
$this->addWarning( [ 'apierror-revwrongpage', $rev->getId(),
wfEscapeWikiText( $pTitleObj->getPrefixedText() ) ] );
}
}
$result = $this->getResult();
// Parse text
$options = ParserOptions::newFromContext( $this->getContext() );
if ( $params['includecomments'] ) {
$options->setRemoveComments( false );
}
$reset = null;
$suppressCache = false;
$this->getHookRunner()->onApiMakeParserOptions(
$options, $titleObj, $params, $this, $reset, $suppressCache );
$retval = [];
if ( isset( $prop['parsetree'] ) || $params['generatexml'] ) {
$parser = $this->parserFactory->getInstance();
$parser->startExternalParse( $titleObj, $options, Parser::OT_PREPROCESS );
$dom = $parser->preprocessToDom( $params['text'] );
// @phan-suppress-next-line PhanUndeclaredMethodInCallable
if ( is_callable( [ $dom, 'saveXML' ] ) ) {
// @phan-suppress-next-line PhanUndeclaredMethod
$xml = $dom->saveXML();
} else {
// @phan-suppress-next-line PhanUndeclaredMethod
$xml = $dom->__toString();
}
if ( isset( $prop['parsetree'] ) ) {
unset( $prop['parsetree'] );
$retval['parsetree'] = $xml;
} else {
// the old way
$result->addValue( null, 'parsetree', $xml );
$result->addValue( null, ApiResult::META_BC_SUBELEMENTS, [ 'parsetree' ] );
}
}
// if they didn't want any output except (probably) the parse tree,
// then don't bother actually fully expanding it
if ( $prop || $params['prop'] === null ) {
$parser = $this->parserFactory->getInstance();
$parser->startExternalParse( $titleObj, $options, Parser::OT_PREPROCESS );
$frame = $parser->getPreprocessor()->newFrame();
$wikitext = $parser->preprocess( $params['text'], $titleObj, $options, $revid, $frame );
if ( $params['prop'] === null ) {
// the old way
ApiResult::setContentValue( $retval, 'wikitext', $wikitext );
} else {
$p_output = $parser->getOutput();
if ( isset( $prop['categories'] ) ) {
$categories = $p_output->getCategoryNames();
if ( $categories ) {
$defaultSortKey = $p_output->getPageProperty( 'defaultsort' ) ?? '';
$categories_result = [];
foreach ( $categories as $category ) {
$entry = [
// Note that ::getCategorySortKey() returns
// the empty string '' to mean
// "use the default sort key"
'sortkey' => $p_output->getCategorySortKey( $category ) ?: $defaultSortKey,
];
ApiResult::setContentValue( $entry, 'category', $category );
$categories_result[] = $entry;
}
ApiResult::setIndexedTagName( $categories_result, 'category' );
$retval['categories'] = $categories_result;
}
}
if ( isset( $prop['properties'] ) ) {
$properties = $p_output->getPageProperties();
if ( $properties ) {
ApiResult::setArrayType( $properties, 'BCkvp', 'name' );
ApiResult::setIndexedTagName( $properties, 'property' );
$retval['properties'] = $properties;
}
}
if ( isset( $prop['volatile'] ) ) {
$retval['volatile'] = $frame->isVolatile();
}
if ( isset( $prop['ttl'] ) && $frame->getTTL() !== null ) {
$retval['ttl'] = $frame->getTTL();
}
if ( isset( $prop['wikitext'] ) ) {
$retval['wikitext'] = $wikitext;
}
if ( isset( $prop['modules'] ) ) {
$retval['modules'] = array_values( array_unique( $p_output->getModules() ) );
// Deprecated since 1.32 (T188689)
$retval['modulescripts'] = [];
$retval['modulestyles'] = array_values( array_unique( $p_output->getModuleStyles() ) );
}
if ( isset( $prop['jsconfigvars'] ) ) {
$showStrategyKeys = (bool)( $params['showstrategykeys'] );
$retval['jsconfigvars'] =
ApiResult::addMetadataToResultVars( $p_output->getJsConfigVars( $showStrategyKeys ) );
}
if ( isset( $prop['encodedjsconfigvars'] ) ) {
$retval['encodedjsconfigvars'] = FormatJson::encode(
$p_output->getJsConfigVars(), false, FormatJson::ALL_OK
);
$retval[ApiResult::META_SUBELEMENTS][] = 'encodedjsconfigvars';
}
if ( isset( $prop['modules'] ) &&
!isset( $prop['jsconfigvars'] ) && !isset( $prop['encodedjsconfigvars'] ) ) {
$this->addWarning( 'apiwarn-moduleswithoutvars' );
}
}
}
ApiResult::setSubelementsList( $retval, [ 'wikitext', 'parsetree' ] );
$result->addValue( null, $this->getModuleName(), $retval );
}
public function getAllowedParams() {
return [
'title' => null,
'text' => [
ParamValidator::PARAM_TYPE => 'text',
ParamValidator::PARAM_REQUIRED => true,
],
'revid' => [
ParamValidator::PARAM_TYPE => 'integer',
],
'prop' => [
ParamValidator::PARAM_TYPE => [
'wikitext',
'categories',
'properties',
'volatile',
'ttl',
'modules',
'jsconfigvars',
'encodedjsconfigvars',
'parsetree',
],
ParamValidator::PARAM_ISMULTI => true,
ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
],
'includecomments' => false,
'showstrategykeys' => false,
'generatexml' => [
ParamValidator::PARAM_TYPE => 'boolean',
ParamValidator::PARAM_DEPRECATED => true,
],
];
}
protected function getExamplesMessages() {
return [
'action=expandtemplates&text={{Project:Sandbox}}'
=> 'apihelp-expandtemplates-example-simple',
];
}
public function getHelpUrls() {
return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Expandtemplates';
}
}