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| 1 | <?php |
| 2 | /** |
| 3 | * Copyright (C) 2011-2022 Wikimedia Foundation and others. |
| 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 | */ |
| 19 | |
| 20 | namespace MediaWiki\Parser\Parsoid\Config; |
| 21 | |
| 22 | use ContentHandler; |
| 23 | use File; |
| 24 | use LanguageCode; |
| 25 | use MediaTransformError; |
| 26 | use MediaWiki\Cache\LinkBatchFactory; |
| 27 | use MediaWiki\Config\ServiceOptions; |
| 28 | use MediaWiki\Content\Transform\ContentTransformer; |
| 29 | use MediaWiki\HookContainer\HookContainer; |
| 30 | use MediaWiki\HookContainer\HookRunner; |
| 31 | use MediaWiki\Linker\Linker; |
| 32 | use MediaWiki\MainConfigNames; |
| 33 | use MediaWiki\Page\File\BadFileLookup; |
| 34 | use MediaWiki\Parser\Parser; |
| 35 | use MediaWiki\Title\Title; |
| 36 | use ParserFactory; |
| 37 | use PPFrame; |
| 38 | use RepoGroup; |
| 39 | use Wikimedia\Assert\UnreachableException; |
| 40 | use Wikimedia\Parsoid\Config\DataAccess as IDataAccess; |
| 41 | use Wikimedia\Parsoid\Config\PageConfig as IPageConfig; |
| 42 | use Wikimedia\Parsoid\Config\PageContent as IPageContent; |
| 43 | use Wikimedia\Parsoid\Core\ContentMetadataCollector; |
| 44 | use Wikimedia\Parsoid\Core\LinkTarget as ParsoidLinkTarget; |
| 45 | use Wikimedia\Rdbms\ReadOnlyMode; |
| 46 | |
| 47 | /** |
| 48 | * Implement Parsoid's abstract class for data access. |
| 49 | * |
| 50 | * @since 1.39 |
| 51 | * @internal |
| 52 | */ |
| 53 | class DataAccess extends IDataAccess { |
| 54 | public const CONSTRUCTOR_OPTIONS = [ |
| 55 | MainConfigNames::SVGMaxSize, |
| 56 | ]; |
| 57 | |
| 58 | private RepoGroup $repoGroup; |
| 59 | private BadFileLookup $badFileLookup; |
| 60 | private HookContainer $hookContainer; |
| 61 | private HookRunner $hookRunner; |
| 62 | private ContentTransformer $contentTransformer; |
| 63 | private ParserFactory $parserFactory; |
| 64 | /** Lazy-created via self::prepareParser() */ |
| 65 | private ?Parser $parser = null; |
| 66 | private PPFrame $ppFrame; |
| 67 | private ?PageConfig $previousPageConfig = null; |
| 68 | private ServiceOptions $config; |
| 69 | private ReadOnlyMode $readOnlyMode; |
| 70 | private LinkBatchFactory $linkBatchFactory; |
| 71 | |
| 72 | /** |
| 73 | * @param ServiceOptions $config MediaWiki main configuration object |
| 74 | * @param RepoGroup $repoGroup |
| 75 | * @param BadFileLookup $badFileLookup |
| 76 | * @param HookContainer $hookContainer |
| 77 | * @param ContentTransformer $contentTransformer |
| 78 | * @param ReadOnlyMode $readOnlyMode used to disable linting when the |
| 79 | * database is read-only. |
| 80 | * @param ParserFactory $parserFactory A legacy parser factory, |
| 81 | * for PST/preprocessing/extension handling |
| 82 | * @param LinkBatchFactory $linkBatchFactory |
| 83 | */ |
| 84 | public function __construct( |
| 85 | ServiceOptions $config, |
| 86 | RepoGroup $repoGroup, |
| 87 | BadFileLookup $badFileLookup, |
| 88 | HookContainer $hookContainer, |
| 89 | ContentTransformer $contentTransformer, |
| 90 | ReadOnlyMode $readOnlyMode, |
| 91 | ParserFactory $parserFactory, |
| 92 | LinkBatchFactory $linkBatchFactory |
| 93 | ) { |
| 94 | $config->assertRequiredOptions( self::CONSTRUCTOR_OPTIONS ); |
| 95 | $this->config = $config; |
| 96 | $this->repoGroup = $repoGroup; |
| 97 | $this->badFileLookup = $badFileLookup; |
| 98 | $this->hookContainer = $hookContainer; |
| 99 | $this->contentTransformer = $contentTransformer; |
| 100 | $this->readOnlyMode = $readOnlyMode; |
| 101 | $this->linkBatchFactory = $linkBatchFactory; |
| 102 | |
| 103 | $this->hookRunner = new HookRunner( $hookContainer ); |
| 104 | |
| 105 | $this->parserFactory = $parserFactory; |
| 106 | $this->previousPageConfig = null; // ensure we initialize parser options |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * @param IPageConfig $pageConfig |
| 111 | * @param File $file |
| 112 | * @param array $hp |
| 113 | * @return array |
| 114 | */ |
| 115 | private function makeTransformOptions( IPageConfig $pageConfig, $file, array $hp ): array { |
| 116 | // Validate the input parameters like Parser::makeImage() |
| 117 | $handler = $file->getHandler(); |
| 118 | if ( !$handler ) { |
| 119 | return []; // will get iconThumb() |
| 120 | } |
| 121 | foreach ( $hp as $name => $value ) { |
| 122 | if ( !$handler->validateParam( $name, $value ) ) { |
| 123 | unset( $hp[$name] ); |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | // This part is similar to Linker::makeImageLink(). If there is no width, |
| 128 | // set one based on the source file size. |
| 129 | $page = $hp['page'] ?? 0; |
| 130 | if ( !isset( $hp['width'] ) ) { |
| 131 | if ( isset( $hp['height'] ) && $file->isVectorized() ) { |
| 132 | // If it's a vector image, and user only specifies height |
| 133 | // we don't want it to be limited by its "normal" width. |
| 134 | $hp['width'] = $this->config->get( MainConfigNames::SVGMaxSize ); |
| 135 | } else { |
| 136 | $hp['width'] = $file->getWidth( $page ); |
| 137 | } |
| 138 | |
| 139 | // We don't need to fill in a default thumbnail width here, since |
| 140 | // that is done by Parsoid. Parsoid always sets the width parameter |
| 141 | // for thumbnails. |
| 142 | } |
| 143 | |
| 144 | // Parser::makeImage() always sets this |
| 145 | $hp['targetlang'] = LanguageCode::bcp47ToInternal( |
| 146 | $pageConfig->getPageLanguageBcp47() |
| 147 | ); |
| 148 | |
| 149 | return $hp; |
| 150 | } |
| 151 | |
| 152 | /** @inheritDoc */ |
| 153 | public function getPageInfo( $pageConfigOrTitle, array $titles ): array { |
| 154 | if ( $pageConfigOrTitle instanceof IPageConfig ) { |
| 155 | $context_title = Title::newFromLinkTarget( |
| 156 | $pageConfigOrTitle->getLinkTarget() |
| 157 | ); |
| 158 | } elseif ( is_string( $pageConfigOrTitle ) ) { |
| 159 | // Temporary, deprecated. |
| 160 | $context_title = Title::newFromTextThrow( $pageConfigOrTitle ); |
| 161 | } elseif ( $pageConfigOrTitle instanceof ParsoidLinkTarget ) { |
| 162 | $context_title = Title::newFromLinkTarget( $pageConfigOrTitle ); |
| 163 | } else { |
| 164 | throw new UnreachableException( "Bad type for argument 1" ); |
| 165 | } |
| 166 | $titleObjs = []; |
| 167 | $pagemap = []; |
| 168 | $classes = []; |
| 169 | $ret = []; |
| 170 | foreach ( $titles as $name ) { |
| 171 | $t = Title::newFromText( $name ); |
| 172 | // Filter out invalid titles. Title::newFromText in core (not our bespoke |
| 173 | // version in src/Utils/Title.php) can return null for invalid titles. |
| 174 | if ( !$t ) { |
| 175 | // FIXME: This is a bandaid to patch up the fact that Env::makeTitle treats |
| 176 | // this as a valid title, but Title::newFromText treats it as invalid. |
| 177 | // T237535 |
| 178 | // This matches what ApiQuery::outputGeneralPageInfo() would |
| 179 | // return for an invalid title. |
| 180 | $ret[$name] = [ |
| 181 | 'pageId' => -1, |
| 182 | 'revId' => -1, |
| 183 | 'invalid' => true, |
| 184 | 'invalidreason' => 'The requested page title is invalid', |
| 185 | ]; |
| 186 | } else { |
| 187 | $titleObjs[$name] = $t; |
| 188 | } |
| 189 | } |
| 190 | $linkBatch = $this->linkBatchFactory->newLinkBatch( $titleObjs ); |
| 191 | $linkBatch->setCaller( __METHOD__ ); |
| 192 | $linkBatch->execute(); |
| 193 | |
| 194 | foreach ( $titleObjs as $obj ) { |
| 195 | $pdbk = $obj->getPrefixedDBkey(); |
| 196 | $pagemap[$obj->getArticleID()] = $pdbk; |
| 197 | $classes[$pdbk] = $obj->isRedirect() ? 'mw-redirect' : ''; |
| 198 | } |
| 199 | $this->hookRunner->onGetLinkColours( |
| 200 | # $classes is passed by reference and mutated |
| 201 | $pagemap, $classes, $context_title |
| 202 | ); |
| 203 | |
| 204 | foreach ( $titleObjs as $name => $obj ) { |
| 205 | /** @var Title $obj */ |
| 206 | $pdbk = $obj->getPrefixedDBkey(); |
| 207 | $c = preg_split( |
| 208 | '/\s+/', $classes[$pdbk] ?? '', -1, PREG_SPLIT_NO_EMPTY |
| 209 | ); |
| 210 | $ret[$name] = [ |
| 211 | 'pageId' => $obj->getArticleID(), |
| 212 | 'revId' => $obj->getLatestRevID(), |
| 213 | 'missing' => !$obj->exists(), |
| 214 | 'known' => $obj->isKnown(), |
| 215 | 'redirect' => $obj->isRedirect(), |
| 216 | 'linkclasses' => $c, # See ApiQueryInfo::getLinkClasses() in core |
| 217 | ]; |
| 218 | } |
| 219 | return $ret; |
| 220 | } |
| 221 | |
| 222 | /** @inheritDoc */ |
| 223 | public function getFileInfo( IPageConfig $pageConfig, array $files ): array { |
| 224 | $page = Title::newFromLinkTarget( $pageConfig->getLinkTarget() ); |
| 225 | |
| 226 | $keys = []; |
| 227 | foreach ( $files as $f ) { |
| 228 | $keys[] = $f[0]; |
| 229 | } |
| 230 | $fileObjs = $this->repoGroup->findFiles( $keys ); |
| 231 | |
| 232 | $ret = []; |
| 233 | foreach ( $files as $f ) { |
| 234 | $filename = $f[0]; |
| 235 | $dims = $f[1]; |
| 236 | |
| 237 | /** @var File $file */ |
| 238 | $file = $fileObjs[$filename] ?? null; |
| 239 | if ( !$file ) { |
| 240 | $ret[] = null; |
| 241 | continue; |
| 242 | } |
| 243 | |
| 244 | // See Linker::makeImageLink; 'page' is a key in $handlerParams |
| 245 | // core uses 'false' as the default then casts to (int) => 0 |
| 246 | $pageNum = $dims['page'] ?? 0; |
| 247 | |
| 248 | $result = [ |
| 249 | 'width' => $file->getWidth( $pageNum ), |
| 250 | 'height' => $file->getHeight( $pageNum ), |
| 251 | 'size' => $file->getSize(), |
| 252 | 'mediatype' => $file->getMediaType(), |
| 253 | 'mime' => $file->getMimeType(), |
| 254 | 'url' => $file->getFullUrl(), |
| 255 | 'mustRender' => $file->mustRender(), |
| 256 | 'badFile' => $this->badFileLookup->isBadFile( $filename, $page ), |
| 257 | 'timestamp' => $file->getTimestamp(), |
| 258 | 'sha1' => $file->getSha1(), |
| 259 | ]; |
| 260 | |
| 261 | $length = $file->getLength(); |
| 262 | if ( $length ) { |
| 263 | $result['duration'] = (float)$length; |
| 264 | } |
| 265 | |
| 266 | if ( isset( $dims['seek'] ) ) { |
| 267 | $dims['thumbtime'] = $dims['seek']; |
| 268 | } |
| 269 | |
| 270 | $txopts = $this->makeTransformOptions( $pageConfig, $file, $dims ); |
| 271 | $mto = $file->transform( $txopts ); |
| 272 | if ( $mto ) { |
| 273 | if ( $mto->isError() && $mto instanceof MediaTransformError ) { |
| 274 | $result['thumberror'] = $mto->toText(); |
| 275 | } else { |
| 276 | if ( $txopts ) { |
| 277 | // Do srcset scaling |
| 278 | Linker::processResponsiveImages( $file, $mto, $txopts ); |
| 279 | if ( count( $mto->responsiveUrls ) ) { |
| 280 | $result['responsiveUrls'] = []; |
| 281 | foreach ( $mto->responsiveUrls as $density => $url ) { |
| 282 | $result['responsiveUrls'][$density] = $url; |
| 283 | } |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | // Proposed MediaTransformOutput serialization method for T51896 etc. |
| 288 | // Note that getAPIData(['fullurl']) would return |
| 289 | // wfExpandUrl(), which wouldn't respect the wiki's |
| 290 | // protocol preferences -- instead it would use the |
| 291 | // protocol used for the API request. |
| 292 | if ( is_callable( [ $mto, 'getAPIData' ] ) ) { |
| 293 | $result['thumbdata'] = $mto->getAPIData( [ 'withhash' ] ); |
| 294 | } |
| 295 | |
| 296 | $result['thumburl'] = $mto->getUrl(); |
| 297 | $result['thumbwidth'] = $mto->getWidth(); |
| 298 | $result['thumbheight'] = $mto->getHeight(); |
| 299 | } |
| 300 | } else { |
| 301 | $result['thumberror'] = "Presumably, invalid parameters, despite validation."; |
| 302 | } |
| 303 | |
| 304 | $ret[] = $result; |
| 305 | } |
| 306 | |
| 307 | return $ret; |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * Prepare MediaWiki's parser for preprocessing or extension tag parsing, |
| 312 | * clearing its state if necessary. |
| 313 | * |
| 314 | * @param IPageConfig $pageConfig |
| 315 | * @param int $outputType |
| 316 | * @return Parser |
| 317 | */ |
| 318 | private function prepareParser( IPageConfig $pageConfig, int $outputType ) { |
| 319 | '@phan-var PageConfig $pageConfig'; // @var PageConfig $pageConfig |
| 320 | // Clear the state only when the PageConfig changes, so that Parser's internal caches can |
| 321 | // be retained. This should also provide better compatibility with extension tags. |
| 322 | $clearState = $this->previousPageConfig !== $pageConfig; |
| 323 | $this->previousPageConfig = $pageConfig; |
| 324 | // Use the same legacy parser object for all calls to extension tag |
| 325 | // processing, for greater compatibility. |
| 326 | $this->parser ??= $this->parserFactory->create(); |
| 327 | $this->parser->startExternalParse( |
| 328 | Title::newFromLinkTarget( $pageConfig->getLinkTarget() ), |
| 329 | $pageConfig->getParserOptions(), |
| 330 | $outputType, $clearState, $pageConfig->getRevisionId() ); |
| 331 | $this->parser->resetOutput(); |
| 332 | |
| 333 | // Retain a PPFrame object between preprocess requests since it contains |
| 334 | // some useful caches. |
| 335 | if ( $clearState ) { |
| 336 | $this->ppFrame = $this->parser->getPreprocessor()->newFrame(); |
| 337 | } |
| 338 | return $this->parser; |
| 339 | } |
| 340 | |
| 341 | /** @inheritDoc */ |
| 342 | public function doPst( IPageConfig $pageConfig, string $wikitext ): string { |
| 343 | '@phan-var PageConfig $pageConfig'; // @var PageConfig $pageConfig |
| 344 | // This could use prepareParser(), but it's only called once per page, |
| 345 | // so it's not essential. |
| 346 | $titleObj = Title::newFromLinkTarget( $pageConfig->getLinkTarget() ); |
| 347 | $user = $pageConfig->getParserOptions()->getUserIdentity(); |
| 348 | $content = ContentHandler::makeContent( $wikitext, $titleObj, CONTENT_MODEL_WIKITEXT ); |
| 349 | return $this->contentTransformer->preSaveTransform( |
| 350 | $content, |
| 351 | $titleObj, |
| 352 | $user, |
| 353 | $pageConfig->getParserOptions() |
| 354 | )->serialize(); |
| 355 | } |
| 356 | |
| 357 | /** @inheritDoc */ |
| 358 | public function parseWikitext( |
| 359 | IPageConfig $pageConfig, |
| 360 | ContentMetadataCollector $metadata, |
| 361 | string $wikitext |
| 362 | ): string { |
| 363 | $parser = $this->prepareParser( $pageConfig, Parser::OT_HTML ); |
| 364 | $html = $parser->parseExtensionTagAsTopLevelDoc( $wikitext ); |
| 365 | // XXX: Ideally we will eventually have the legacy parser use our |
| 366 | // ContentMetadataCollector instead of having a new ParserOutput |
| 367 | // created (implicitly in ::prepareParser()/Parser::resetOutput() ) |
| 368 | // which we then have to manually merge. |
| 369 | $out = $parser->getOutput(); |
| 370 | $out->setRawText( $html ); |
| 371 | $out->collectMetadata( $metadata ); # merges $out into $metadata |
| 372 | return Parser::extractBody( $out->getRawText() ); |
| 373 | } |
| 374 | |
| 375 | /** @inheritDoc */ |
| 376 | public function preprocessWikitext( |
| 377 | IPageConfig $pageConfig, |
| 378 | ContentMetadataCollector $metadata, |
| 379 | string $wikitext |
| 380 | ): string { |
| 381 | $parser = $this->prepareParser( $pageConfig, Parser::OT_PREPROCESS ); |
| 382 | $this->hookRunner->onParserBeforePreprocess( |
| 383 | # $wikitext is passed by reference and mutated |
| 384 | $parser, $wikitext, $parser->getStripState() |
| 385 | ); |
| 386 | $wikitext = $parser->replaceVariables( $wikitext, $this->ppFrame ); |
| 387 | // FIXME (T289545): StripState markers protect content that need to be protected from further |
| 388 | // "wikitext processing". So, where the result has strip state markers, we actually |
| 389 | // need to tunnel this content through rather than unwrap and let it go through the |
| 390 | // rest of the parsoid pipeline. For example, some parser functions might return HTML |
| 391 | // not wikitext, and where the content might contain wikitext characters, we are now |
| 392 | // going to potentially mangle that output. |
| 393 | $wikitext = $parser->getStripState()->unstripBoth( $wikitext ); |
| 394 | |
| 395 | // XXX: Ideally we will eventually have the legacy parser use our |
| 396 | // ContentMetadataCollector instead of having a new ParserOutput |
| 397 | // created (implicitly in ::prepareParser()/Parser::resetOutput() ) |
| 398 | // which we then have to manually merge. |
| 399 | $out = $parser->getOutput(); |
| 400 | $out->collectMetadata( $metadata ); # merges $out into $metadata |
| 401 | return $wikitext; |
| 402 | } |
| 403 | |
| 404 | /** @inheritDoc */ |
| 405 | public function fetchTemplateSource( |
| 406 | IPageConfig $pageConfig, $title |
| 407 | ): ?IPageContent { |
| 408 | '@phan-var PageConfig $pageConfig'; // @var PageConfig $pageConfig |
| 409 | if ( is_string( $title ) ) { |
| 410 | $titleObj = Title::newFromTextThrow( $title ); |
| 411 | } else { |
| 412 | $titleObj = Title::newFromLinkTarget( $title ); |
| 413 | } |
| 414 | |
| 415 | // Use the PageConfig to take advantage of custom template |
| 416 | // fetch hooks like FlaggedRevisions, etc. |
| 417 | $revRecord = $pageConfig->fetchRevisionRecordOfTemplate( $titleObj ); |
| 418 | |
| 419 | return $revRecord ? new PageContent( $revRecord ) : null; |
| 420 | } |
| 421 | |
| 422 | /** @inheritDoc */ |
| 423 | public function fetchTemplateData( IPageConfig $pageConfig, $title ): ?array { |
| 424 | $ret = []; |
| 425 | if ( !is_string( $title ) ) { |
| 426 | $titleObj = Title::newFromLinkTarget( $title ); |
| 427 | $title = $titleObj->getPrefixedText(); |
| 428 | } |
| 429 | // @todo: This hook needs some clean up: T304899 |
| 430 | $this->hookRunner->onParserFetchTemplateData( |
| 431 | [ $title ], |
| 432 | $ret # value returned by reference |
| 433 | ); |
| 434 | |
| 435 | // Cast value to array since the hook returns this as a stdclass |
| 436 | $tplData = $ret[$title] ?? null; |
| 437 | if ( $tplData ) { |
| 438 | // Deep convert to associative array |
| 439 | $tplData = json_decode( json_encode( $tplData ), true ); |
| 440 | } |
| 441 | return $tplData; |
| 442 | } |
| 443 | |
| 444 | /** @inheritDoc */ |
| 445 | public function logLinterData( IPageConfig $pageConfig, array $lints ): void { |
| 446 | if ( $this->readOnlyMode->isReadOnly() ) { |
| 447 | return; |
| 448 | } |
| 449 | |
| 450 | $revId = $pageConfig->getRevisionId(); |
| 451 | $title = Title::newFromLinkTarget( |
| 452 | $pageConfig->getLinkTarget() |
| 453 | )->getPrefixedText(); |
| 454 | $pageInfo = $this->getPageInfo( $pageConfig, [ $title ] ); |
| 455 | $latest = $pageInfo[$title]['revId']; |
| 456 | |
| 457 | // Only send the request if it the latest revision |
| 458 | if ( $revId !== null && $revId === $latest ) { |
| 459 | $this->hookRunner->onParserLogLinterData( |
| 460 | $title, $revId, $lints |
| 461 | ); |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | } |