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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
23namespace MediaWiki\Api;
24
25use MediaWiki\Json\FormatJson;
26use MediaWiki\Parser\Parser;
27use MediaWiki\Parser\ParserFactory;
28use MediaWiki\Parser\ParserOptions;
29use MediaWiki\Revision\RevisionStore;
30use MediaWiki\Title\Title;
31use Wikimedia\ParamValidator\ParamValidator;
32
33/**
34 * API module that functions as a shortcut to the wikitext preprocessor. Expands
35 * any templates in a provided string, and returns the result of this expansion
36 * to the caller.
37 *
38 * @ingroup API
39 */
40class ApiExpandTemplates extends ApiBase {
41    private RevisionStore $revisionStore;
42    private ParserFactory $parserFactory;
43
44    public function __construct(
45        ApiMain $main,
46        string $action,
47        RevisionStore $revisionStore,
48        ParserFactory $parserFactory
49    ) {
50        parent::__construct( $main, $action );
51        $this->revisionStore = $revisionStore;
52        $this->parserFactory = $parserFactory;
53    }
54
55    public function execute() {
56        // Cache may vary on the user because ParserOptions gets data from it
57        $this->getMain()->setCacheMode( 'anon-public-user-private' );
58
59        // Get parameters
60        $params = $this->extractRequestParams();
61        $this->requireMaxOneParameter( $params, 'prop', 'generatexml' );
62
63        $title = $params['title'];
64        if ( $title === null ) {
65            $titleProvided = false;
66            // A title is needed for parsing, so arbitrarily choose one
67            $title = 'API';
68        } else {
69            $titleProvided = true;
70        }
71
72        if ( $params['prop'] === null ) {
73            $this->addDeprecation(
74                [ 'apiwarn-deprecation-missingparam', 'prop' ], 'action=expandtemplates&!prop'
75            );
76            $prop = [];
77        } else {
78            $prop = array_fill_keys( $params['prop'], true );
79        }
80
81        $titleObj = Title::newFromText( $title );
82        if ( !$titleObj || $titleObj->isExternal() ) {
83            $this->dieWithError( [ 'apierror-invalidtitle', wfEscapeWikiText( $params['title'] ) ] );
84        }
85
86        // Get title and revision ID for parser
87        $revid = $params['revid'];
88        if ( $revid !== null ) {
89            $rev = $this->revisionStore->getRevisionById( $revid );
90            if ( !$rev ) {
91                $this->dieWithError( [ 'apierror-nosuchrevid', $revid ] );
92            }
93            $pTitleObj = $titleObj;
94            $titleObj = Title::newFromLinkTarget( $rev->getPageAsLinkTarget() );
95            if ( $titleProvided && !$titleObj->equals( $pTitleObj ) ) {
96                $this->addWarning( [ 'apierror-revwrongpage', $rev->getId(),
97                    wfEscapeWikiText( $pTitleObj->getPrefixedText() ) ] );
98            }
99        }
100
101        $result = $this->getResult();
102
103        // Parse text
104        $options = ParserOptions::newFromContext( $this->getContext() );
105
106        if ( $params['includecomments'] ) {
107            $options->setRemoveComments( false );
108        }
109
110        $reset = null;
111        $suppressCache = false;
112        $this->getHookRunner()->onApiMakeParserOptions(
113            $options, $titleObj, $params, $this, $reset, $suppressCache );
114
115        $retval = [];
116
117        if ( isset( $prop['parsetree'] ) || $params['generatexml'] ) {
118            $parser = $this->parserFactory->getInstance();
119            $parser->startExternalParse( $titleObj, $options, Parser::OT_PREPROCESS );
120            $dom = $parser->preprocessToDom( $params['text'] );
121            // @phan-suppress-next-line PhanUndeclaredMethodInCallable
122            if ( is_callable( [ $dom, 'saveXML' ] ) ) {
123                // @phan-suppress-next-line PhanUndeclaredMethod
124                $xml = $dom->saveXML();
125            } else {
126                // @phan-suppress-next-line PhanUndeclaredMethod
127                $xml = $dom->__toString();
128            }
129            if ( isset( $prop['parsetree'] ) ) {
130                unset( $prop['parsetree'] );
131                $retval['parsetree'] = $xml;
132            } else {
133                // the old way
134                $result->addValue( null, 'parsetree', $xml );
135                $result->addValue( null, ApiResult::META_BC_SUBELEMENTS, [ 'parsetree' ] );
136            }
137        }
138
139        // if they didn't want any output except (probably) the parse tree,
140        // then don't bother actually fully expanding it
141        if ( $prop || $params['prop'] === null ) {
142            $parser = $this->parserFactory->getInstance();
143            $parser->startExternalParse( $titleObj, $options, Parser::OT_PREPROCESS );
144            $frame = $parser->getPreprocessor()->newFrame();
145            $wikitext = $parser->preprocess( $params['text'], $titleObj, $options, $revid, $frame );
146            if ( $params['prop'] === null ) {
147                // the old way
148                ApiResult::setContentValue( $retval, 'wikitext', $wikitext );
149            } else {
150                $p_output = $parser->getOutput();
151                if ( isset( $prop['categories'] ) ) {
152                    $categories = $p_output->getCategoryNames();
153                    if ( $categories ) {
154                        $defaultSortKey = $p_output->getPageProperty( 'defaultsort' ) ?? '';
155                        $categories_result = [];
156                        foreach ( $categories as $category ) {
157                            $entry = [
158                                // Note that ::getCategorySortKey() returns
159                                // the empty string '' to mean
160                                // "use the default sort key"
161                                'sortkey' => $p_output->getCategorySortKey( $category ) ?: $defaultSortKey,
162                            ];
163                            ApiResult::setContentValue( $entry, 'category', $category );
164                            $categories_result[] = $entry;
165                        }
166                        ApiResult::setIndexedTagName( $categories_result, 'category' );
167                        $retval['categories'] = $categories_result;
168                    }
169                }
170                if ( isset( $prop['properties'] ) ) {
171                    $properties = $p_output->getPageProperties();
172                    if ( $properties ) {
173                        ApiResult::setArrayType( $properties, 'BCkvp', 'name' );
174                        ApiResult::setIndexedTagName( $properties, 'property' );
175                        $retval['properties'] = $properties;
176                    }
177                }
178                if ( isset( $prop['volatile'] ) ) {
179                    $retval['volatile'] = $frame->isVolatile();
180                }
181                if ( isset( $prop['ttl'] ) && $frame->getTTL() !== null ) {
182                    $retval['ttl'] = $frame->getTTL();
183                }
184                if ( isset( $prop['wikitext'] ) ) {
185                    $retval['wikitext'] = $wikitext;
186                }
187                if ( isset( $prop['modules'] ) ) {
188                    $retval['modules'] = array_values( array_unique( $p_output->getModules() ) );
189                    // Deprecated since 1.32 (T188689)
190                    $retval['modulescripts'] = [];
191                    $retval['modulestyles'] = array_values( array_unique( $p_output->getModuleStyles() ) );
192                }
193                if ( isset( $prop['jsconfigvars'] ) ) {
194                    $showStrategyKeys = (bool)( $params['showstrategykeys'] );
195                    $retval['jsconfigvars'] =
196                        ApiResult::addMetadataToResultVars( $p_output->getJsConfigVars( $showStrategyKeys ) );
197                }
198                if ( isset( $prop['encodedjsconfigvars'] ) ) {
199                    $retval['encodedjsconfigvars'] = FormatJson::encode(
200                        $p_output->getJsConfigVars(), false, FormatJson::ALL_OK
201                    );
202                    $retval[ApiResult::META_SUBELEMENTS][] = 'encodedjsconfigvars';
203                }
204                if ( isset( $prop['modules'] ) &&
205                    !isset( $prop['jsconfigvars'] ) && !isset( $prop['encodedjsconfigvars'] ) ) {
206                    $this->addWarning( 'apiwarn-moduleswithoutvars' );
207                }
208            }
209        }
210        ApiResult::setSubelementsList( $retval, [ 'wikitext', 'parsetree' ] );
211        $result->addValue( null, $this->getModuleName(), $retval );
212    }
213
214    public function getAllowedParams() {
215        return [
216            'title' => null,
217            'text' => [
218                ParamValidator::PARAM_TYPE => 'text',
219                ParamValidator::PARAM_REQUIRED => true,
220            ],
221            'revid' => [
222                ParamValidator::PARAM_TYPE => 'integer',
223            ],
224            'prop' => [
225                ParamValidator::PARAM_TYPE => [
226                    'wikitext',
227                    'categories',
228                    'properties',
229                    'volatile',
230                    'ttl',
231                    'modules',
232                    'jsconfigvars',
233                    'encodedjsconfigvars',
234                    'parsetree',
235                ],
236                ParamValidator::PARAM_ISMULTI => true,
237                ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
238            ],
239            'includecomments' => false,
240            'showstrategykeys' => false,
241            'generatexml' => [
242                ParamValidator::PARAM_TYPE => 'boolean',
243                ParamValidator::PARAM_DEPRECATED => true,
244            ],
245        ];
246    }
247
248    protected function getExamplesMessages() {
249        return [
250            'action=expandtemplates&text={{Project:Sandbox}}'
251                => 'apihelp-expandtemplates-example-simple',
252        ];
253    }
254
255    public function getHelpUrls() {
256        return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Expandtemplates';
257    }
258}
259
260/** @deprecated class alias since 1.43 */
261class_alias( ApiExpandTemplates::class, 'ApiExpandTemplates' );