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| 1 | <?php |
| 2 | /** |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 16 | * http://www.gnu.org/copyleft/gpl.html |
| 17 | * |
| 18 | * @file |
| 19 | * @author Trevor Parscal |
| 20 | * @author Roan Kattouw |
| 21 | */ |
| 22 | |
| 23 | namespace MediaWiki\ResourceLoader; |
| 24 | |
| 25 | use Content; |
| 26 | use CSSJanus; |
| 27 | use FormatJson; |
| 28 | use MediaWiki\Linker\LinkTarget; |
| 29 | use MediaWiki\MainConfigNames; |
| 30 | use MediaWiki\MediaWikiServices; |
| 31 | use MediaWiki\Page\PageIdentity; |
| 32 | use MediaWiki\Revision\RevisionRecord; |
| 33 | use MediaWiki\Revision\SlotRecord; |
| 34 | use MediaWiki\Title\Title; |
| 35 | use MediaWiki\Title\TitleValue; |
| 36 | use MemoizedCallable; |
| 37 | use Wikimedia\Minify\CSSMin; |
| 38 | use Wikimedia\Rdbms\Database; |
| 39 | use Wikimedia\Rdbms\IReadableDatabase; |
| 40 | use Wikimedia\Timestamp\ConvertibleTimestamp; |
| 41 | |
| 42 | /** |
| 43 | * Abstraction for ResourceLoader modules which pull from wiki pages |
| 44 | * |
| 45 | * This can only be used for wiki pages in the MediaWiki and User namespaces, |
| 46 | * because of its dependence on the functionality of Title::isUserConfigPage() |
| 47 | * and Title::isSiteConfigPage(). |
| 48 | * |
| 49 | * This module supports being used as a placeholder for a module on a remote wiki. |
| 50 | * To do so, getDB() must be overloaded to return a foreign database object that |
| 51 | * allows local wikis to query page metadata. |
| 52 | * |
| 53 | * Safe for calls on local wikis are: |
| 54 | * - Option getters: |
| 55 | * - getGroup() |
| 56 | * - getPages() |
| 57 | * - Basic methods that strictly involve the foreign database |
| 58 | * - getDB() |
| 59 | * - isKnownEmpty() |
| 60 | * - getTitleInfo() |
| 61 | * |
| 62 | * @ingroup ResourceLoader |
| 63 | * @since 1.17 |
| 64 | */ |
| 65 | class WikiModule extends Module { |
| 66 | /** @var string Origin defaults to users with sitewide authority */ |
| 67 | protected $origin = self::ORIGIN_USER_SITEWIDE; |
| 68 | |
| 69 | /** |
| 70 | * In-process cache for title info, structured as an array |
| 71 | * [ |
| 72 | * <batchKey> // Pipe-separated list of sorted keys from getPages |
| 73 | * => [ |
| 74 | * <titleKey> => [ // Normalised title key |
| 75 | * 'page_len' => .., |
| 76 | * 'page_latest' => .., |
| 77 | * 'page_touched' => .., |
| 78 | * ] |
| 79 | * ] |
| 80 | * ] |
| 81 | * @see self::fetchTitleInfo() |
| 82 | * @see self::makeTitleKey() |
| 83 | * @var array |
| 84 | */ |
| 85 | protected $titleInfo = []; |
| 86 | |
| 87 | /** @var array List of page names that contain CSS */ |
| 88 | protected $styles = []; |
| 89 | |
| 90 | /** @var array List of page names that contain JavaScript */ |
| 91 | protected $scripts = []; |
| 92 | |
| 93 | /** @var array List of page names that contain JSON */ |
| 94 | protected $datas = []; |
| 95 | |
| 96 | /** @var string|null Group of module */ |
| 97 | protected $group; |
| 98 | |
| 99 | /** |
| 100 | * @param array|null $options For back-compat, this can be omitted in favour of overwriting |
| 101 | * getPages. |
| 102 | */ |
| 103 | public function __construct( array $options = null ) { |
| 104 | if ( $options === null ) { |
| 105 | return; |
| 106 | } |
| 107 | |
| 108 | foreach ( $options as $member => $option ) { |
| 109 | switch ( $member ) { |
| 110 | case 'styles': |
| 111 | case 'scripts': |
| 112 | case 'datas': |
| 113 | case 'group': |
| 114 | $this->{$member} = $option; |
| 115 | break; |
| 116 | } |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * Subclasses should return an associative array of resources in the module. |
| 122 | * Keys should be the title of a page in the MediaWiki or User namespace. |
| 123 | * |
| 124 | * Values should be a nested array of options. |
| 125 | * The supported keys are 'type' and (CSS only) 'media'. |
| 126 | * |
| 127 | * For scripts, 'type' should be 'script'. |
| 128 | * For JSON files, 'type' should be 'data'. |
| 129 | * For stylesheets, 'type' should be 'style'. |
| 130 | * |
| 131 | * There is an optional 'media' key, the value of which can be the |
| 132 | * medium ('screen', 'print', etc.) of the stylesheet. |
| 133 | * |
| 134 | * @param Context $context |
| 135 | * @return array[] |
| 136 | * @phan-return array<string,array{type:string,media?:string}> |
| 137 | */ |
| 138 | protected function getPages( Context $context ) { |
| 139 | $config = $this->getConfig(); |
| 140 | $pages = []; |
| 141 | |
| 142 | // Filter out pages from origins not allowed by the current wiki configuration. |
| 143 | if ( $config->get( MainConfigNames::UseSiteJs ) ) { |
| 144 | foreach ( $this->scripts as $script ) { |
| 145 | $pages[$script] = [ 'type' => 'script' ]; |
| 146 | } |
| 147 | foreach ( $this->datas as $data ) { |
| 148 | $pages[$data] = [ 'type' => 'data' ]; |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | if ( $config->get( MainConfigNames::UseSiteCss ) ) { |
| 153 | foreach ( $this->styles as $style ) { |
| 154 | $pages[$style] = [ 'type' => 'style' ]; |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | return $pages; |
| 159 | } |
| 160 | |
| 161 | /** |
| 162 | * Get group name |
| 163 | * |
| 164 | * @return string|null |
| 165 | */ |
| 166 | public function getGroup() { |
| 167 | return $this->group; |
| 168 | } |
| 169 | |
| 170 | /** |
| 171 | * Get the Database handle used for computing the module version. |
| 172 | * |
| 173 | * Subclasses may override this to return a foreign database, which would |
| 174 | * allow them to register a module on wiki A that fetches wiki pages from |
| 175 | * wiki B. |
| 176 | * |
| 177 | * The way this works is that the local module is a placeholder that can |
| 178 | * only computer a module version hash. The 'source' of the module must |
| 179 | * be set to the foreign wiki directly. Methods getScript() and getContent() |
| 180 | * will not use this handle and are not valid on the local wiki. |
| 181 | * |
| 182 | * @return IReadableDatabase |
| 183 | */ |
| 184 | protected function getDB() { |
| 185 | return MediaWikiServices::getInstance()->getConnectionProvider()->getReplicaDatabase(); |
| 186 | } |
| 187 | |
| 188 | /** |
| 189 | * @param string $titleText |
| 190 | * @param Context $context |
| 191 | * @return null|string |
| 192 | * @since 1.32 added the $context parameter |
| 193 | */ |
| 194 | protected function getContent( $titleText, Context $context ) { |
| 195 | $pageStore = MediaWikiServices::getInstance()->getPageStore(); |
| 196 | $title = $pageStore->getPageByText( $titleText ); |
| 197 | if ( !$title ) { |
| 198 | return null; // Bad title |
| 199 | } |
| 200 | |
| 201 | $content = $this->getContentObj( $title, $context ); |
| 202 | if ( !$content ) { |
| 203 | return null; // No content found |
| 204 | } |
| 205 | |
| 206 | $handler = $content->getContentHandler(); |
| 207 | if ( $handler->isSupportedFormat( CONTENT_FORMAT_CSS ) ) { |
| 208 | $format = CONTENT_FORMAT_CSS; |
| 209 | } elseif ( $handler->isSupportedFormat( CONTENT_FORMAT_JAVASCRIPT ) ) { |
| 210 | $format = CONTENT_FORMAT_JAVASCRIPT; |
| 211 | } elseif ( $handler->isSupportedFormat( CONTENT_FORMAT_JSON ) ) { |
| 212 | $format = CONTENT_FORMAT_JSON; |
| 213 | } else { |
| 214 | return null; // Bad content model |
| 215 | } |
| 216 | |
| 217 | return $content->serialize( $format ); |
| 218 | } |
| 219 | |
| 220 | /** |
| 221 | * @param PageIdentity $page |
| 222 | * @param Context $context |
| 223 | * @param int $maxRedirects Maximum number of redirects to follow. |
| 224 | * Either 0 or 1. |
| 225 | * @return Content|null |
| 226 | * @since 1.32 added the $context and $maxRedirects parameters |
| 227 | * @internal for testing |
| 228 | */ |
| 229 | protected function getContentObj( |
| 230 | PageIdentity $page, Context $context, $maxRedirects = 1 |
| 231 | ) { |
| 232 | $overrideCallback = $context->getContentOverrideCallback(); |
| 233 | $content = $overrideCallback ? call_user_func( $overrideCallback, $page ) : null; |
| 234 | if ( $content ) { |
| 235 | if ( !$content instanceof Content ) { |
| 236 | $this->getLogger()->error( |
| 237 | 'Bad content override for "{title}" in ' . __METHOD__, |
| 238 | [ 'title' => (string)$page ] |
| 239 | ); |
| 240 | return null; |
| 241 | } |
| 242 | } else { |
| 243 | $revision = MediaWikiServices::getInstance() |
| 244 | ->getRevisionLookup() |
| 245 | ->getKnownCurrentRevision( $page ); |
| 246 | if ( !$revision ) { |
| 247 | return null; |
| 248 | } |
| 249 | $content = $revision->getContent( SlotRecord::MAIN, RevisionRecord::RAW ); |
| 250 | |
| 251 | if ( !$content ) { |
| 252 | $this->getLogger()->error( |
| 253 | 'Failed to load content of CSS/JS/JSON page "{title}" in ' . __METHOD__, |
| 254 | [ 'title' => (string)$page ] |
| 255 | ); |
| 256 | return null; |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | if ( $maxRedirects > 0 ) { |
| 261 | $newTitle = $content->getRedirectTarget(); |
| 262 | if ( $newTitle ) { |
| 263 | return $this->getContentObj( $newTitle, $context, 0 ); |
| 264 | } |
| 265 | } |
| 266 | |
| 267 | return $content; |
| 268 | } |
| 269 | |
| 270 | /** |
| 271 | * @param Context $context |
| 272 | * @return bool |
| 273 | */ |
| 274 | public function shouldEmbedModule( Context $context ) { |
| 275 | $overrideCallback = $context->getContentOverrideCallback(); |
| 276 | if ( $overrideCallback && $this->getSource() === 'local' ) { |
| 277 | foreach ( $this->getPages( $context ) as $page => $info ) { |
| 278 | $title = Title::newFromText( $page ); |
| 279 | if ( $title && call_user_func( $overrideCallback, $title ) !== null ) { |
| 280 | return true; |
| 281 | } |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | return parent::shouldEmbedModule( $context ); |
| 286 | } |
| 287 | |
| 288 | /** |
| 289 | * @param Context $context |
| 290 | * @return string|array JavaScript code, or a package files array |
| 291 | */ |
| 292 | public function getScript( Context $context ) { |
| 293 | if ( $this->isPackaged() ) { |
| 294 | return $this->getPackageFiles( $context ); |
| 295 | } else { |
| 296 | $scripts = ''; |
| 297 | foreach ( $this->getPages( $context ) as $titleText => $options ) { |
| 298 | if ( $options['type'] !== 'script' ) { |
| 299 | continue; |
| 300 | } |
| 301 | $script = $this->getContent( $titleText, $context ); |
| 302 | if ( strval( $script ) !== '' ) { |
| 303 | $script = $this->validateScriptFile( $titleText, $script ); |
| 304 | $scripts .= ResourceLoader::makeComment( $titleText ) . $script . "\n"; |
| 305 | } |
| 306 | } |
| 307 | return $scripts; |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | /** |
| 312 | * Get whether this module is a packaged module. |
| 313 | * |
| 314 | * If false (the default), JavaScript pages are concatenated and executed as a single |
| 315 | * script. JSON pages are not supported. |
| 316 | * |
| 317 | * If true, the pages are bundled such that each page gets a virtual file name, where only |
| 318 | * the "main" script will be executed at first, and other JS or JSON pages may be be imported |
| 319 | * in client-side code through the `require()` function. |
| 320 | * |
| 321 | * @stable to override |
| 322 | * @since 1.38 |
| 323 | * @return bool |
| 324 | */ |
| 325 | protected function isPackaged(): bool { |
| 326 | // Packaged mode is disabled by default for backwards compatibility. |
| 327 | // Subclasses may opt-in to this feature. |
| 328 | return false; |
| 329 | } |
| 330 | |
| 331 | /** |
| 332 | * @return bool |
| 333 | */ |
| 334 | public function supportsURLLoading() { |
| 335 | // If package files are involved, don't support URL loading |
| 336 | return !$this->isPackaged(); |
| 337 | } |
| 338 | |
| 339 | /** |
| 340 | * Convert a namespace-formatted page title to a virtual package file name. |
| 341 | * |
| 342 | * This determines how the page may be imported in client-side code via `require()`. |
| 343 | * |
| 344 | * @stable to override |
| 345 | * @since 1.38 |
| 346 | * @param string $titleText |
| 347 | * @return string |
| 348 | */ |
| 349 | protected function getRequireKey( string $titleText ): string { |
| 350 | return $titleText; |
| 351 | } |
| 352 | |
| 353 | /** |
| 354 | * @param Context $context |
| 355 | * @return array |
| 356 | * @phan-return array{main:string,files:string[][]} |
| 357 | */ |
| 358 | private function getPackageFiles( Context $context ): array { |
| 359 | $main = null; |
| 360 | |
| 361 | $files = []; |
| 362 | foreach ( $this->getPages( $context ) as $titleText => $options ) { |
| 363 | if ( $options['type'] !== 'script' && $options['type'] !== 'data' ) { |
| 364 | continue; |
| 365 | } |
| 366 | $content = $this->getContent( $titleText, $context ); |
| 367 | if ( strval( $content ) !== '' ) { |
| 368 | $fileKey = $this->getRequireKey( $titleText ); |
| 369 | if ( $options['type'] === 'script' ) { |
| 370 | $script = $this->validateScriptFile( $titleText, $content ); |
| 371 | $files[$fileKey] = [ |
| 372 | 'type' => 'script', |
| 373 | 'content' => $script, |
| 374 | ]; |
| 375 | // First script becomes the "main" script |
| 376 | if ( $main === null ) { |
| 377 | $main = $fileKey; |
| 378 | } |
| 379 | } elseif ( $options['type'] === 'data' ) { |
| 380 | $data = FormatJson::decode( $content ); |
| 381 | if ( $data == null ) { |
| 382 | // This is unlikely to happen since we only load JSON from |
| 383 | // wiki pages with a JSON content model, which are validated |
| 384 | // during edit save. |
| 385 | $data = [ 'error' => 'Invalid JSON' ]; |
| 386 | } |
| 387 | $files[$fileKey] = [ |
| 388 | 'type' => 'data', |
| 389 | 'content' => $data, |
| 390 | ]; |
| 391 | } |
| 392 | } |
| 393 | } |
| 394 | |
| 395 | return [ |
| 396 | 'main' => $main, |
| 397 | 'files' => $files, |
| 398 | ]; |
| 399 | } |
| 400 | |
| 401 | /** |
| 402 | * @param Context $context |
| 403 | * @return array |
| 404 | */ |
| 405 | public function getStyles( Context $context ) { |
| 406 | $remoteDir = $this->getConfig()->get( MainConfigNames::ScriptPath ); |
| 407 | if ( $remoteDir === '' ) { |
| 408 | // When the site is configured with the script path at the |
| 409 | // document root, MediaWiki uses an empty string but that is |
| 410 | // not a valid URI path. Expand to a slash to avoid fatals |
| 411 | // later in CSSMin::resolveUrl(). |
| 412 | // See also FilePath::extractBasePaths, T282280. |
| 413 | $remoteDir = '/'; |
| 414 | } |
| 415 | |
| 416 | $styles = []; |
| 417 | foreach ( $this->getPages( $context ) as $titleText => $options ) { |
| 418 | if ( $options['type'] !== 'style' ) { |
| 419 | continue; |
| 420 | } |
| 421 | $style = $this->getContent( $titleText, $context ); |
| 422 | if ( strval( $style ) === '' ) { |
| 423 | continue; |
| 424 | } |
| 425 | if ( $this->getFlip( $context ) ) { |
| 426 | $style = CSSJanus::transform( $style, true, false ); |
| 427 | } |
| 428 | |
| 429 | $style = MemoizedCallable::call( |
| 430 | [ CSSMin::class, 'remap' ], |
| 431 | [ $style, false, $remoteDir, true ] |
| 432 | ); |
| 433 | $media = $options['media'] ?? 'all'; |
| 434 | $style = ResourceLoader::makeComment( $titleText ) . $style; |
| 435 | $styles[$media][] = $style; |
| 436 | } |
| 437 | return $styles; |
| 438 | } |
| 439 | |
| 440 | /** |
| 441 | * Disable module content versioning. |
| 442 | * |
| 443 | * This class does not support generating content outside of a module |
| 444 | * request due to foreign database support. |
| 445 | * |
| 446 | * See getDefinitionSummary() for meta-data versioning. |
| 447 | * |
| 448 | * @return bool |
| 449 | */ |
| 450 | public function enableModuleContentVersion() { |
| 451 | return false; |
| 452 | } |
| 453 | |
| 454 | /** |
| 455 | * @param Context $context |
| 456 | * @return array |
| 457 | */ |
| 458 | public function getDefinitionSummary( Context $context ) { |
| 459 | $summary = parent::getDefinitionSummary( $context ); |
| 460 | $summary[] = [ |
| 461 | 'pages' => $this->getPages( $context ), |
| 462 | // Includes meta data of current revisions |
| 463 | 'titleInfo' => $this->getTitleInfo( $context ), |
| 464 | ]; |
| 465 | return $summary; |
| 466 | } |
| 467 | |
| 468 | /** |
| 469 | * @param Context $context |
| 470 | * @return bool |
| 471 | */ |
| 472 | public function isKnownEmpty( Context $context ) { |
| 473 | // If a module has dependencies it cannot be empty. An empty array will be cast to false |
| 474 | if ( $this->getDependencies() ) { |
| 475 | return false; |
| 476 | } |
| 477 | |
| 478 | // Optimisation: For user modules, don't needlessly load if there are no non-empty pages |
| 479 | // This is worthwhile because unlike most modules, user modules require their own |
| 480 | // separate embedded request (managed by ClientHtml). |
| 481 | $revisions = $this->getTitleInfo( $context ); |
| 482 | if ( $this->getGroup() === self::GROUP_USER ) { |
| 483 | foreach ( $revisions as $revision ) { |
| 484 | if ( $revision['page_len'] > 0 ) { |
| 485 | // At least one non-empty page, module should be loaded |
| 486 | return false; |
| 487 | } |
| 488 | } |
| 489 | return true; |
| 490 | } |
| 491 | |
| 492 | // T70488: For non-user modules (i.e. ones that are called in cached HTML output) only check |
| 493 | // page existence. This ensures that, if some pages in a module are temporarily blanked, |
| 494 | // we don't stop embedding the module's script or link tag on newly cached pages. |
| 495 | return count( $revisions ) === 0; |
| 496 | } |
| 497 | |
| 498 | private function setTitleInfo( $batchKey, array $titleInfo ) { |
| 499 | $this->titleInfo[$batchKey] = $titleInfo; |
| 500 | } |
| 501 | |
| 502 | private static function makeTitleKey( LinkTarget $title ) { |
| 503 | // Used for keys in titleInfo. |
| 504 | return "{$title->getNamespace()}:{$title->getDBkey()}"; |
| 505 | } |
| 506 | |
| 507 | /** |
| 508 | * Get the information about the wiki pages for a given context. |
| 509 | * @param Context $context |
| 510 | * @return array[] Keyed by page name |
| 511 | */ |
| 512 | protected function getTitleInfo( Context $context ) { |
| 513 | $pageNames = array_keys( $this->getPages( $context ) ); |
| 514 | sort( $pageNames ); |
| 515 | $batchKey = implode( '|', $pageNames ); |
| 516 | if ( !isset( $this->titleInfo[$batchKey] ) ) { |
| 517 | $this->titleInfo[$batchKey] = static::fetchTitleInfo( $this->getDB(), $pageNames, __METHOD__ ); |
| 518 | } |
| 519 | |
| 520 | $titleInfo = $this->titleInfo[$batchKey]; |
| 521 | |
| 522 | // Override the title info from the overrides, if any |
| 523 | $overrideCallback = $context->getContentOverrideCallback(); |
| 524 | if ( $overrideCallback ) { |
| 525 | foreach ( $pageNames as $page ) { |
| 526 | $title = Title::newFromText( $page ); |
| 527 | $content = $title ? call_user_func( $overrideCallback, $title ) : null; |
| 528 | if ( $content !== null ) { |
| 529 | $titleInfo[$title->getPrefixedText()] = [ |
| 530 | 'page_len' => $content->getSize(), |
| 531 | 'page_latest' => 'TBD', // None available |
| 532 | 'page_touched' => ConvertibleTimestamp::now( TS_MW ), |
| 533 | ]; |
| 534 | } |
| 535 | } |
| 536 | } |
| 537 | |
| 538 | return $titleInfo; |
| 539 | } |
| 540 | |
| 541 | /** |
| 542 | * @param IReadableDatabase $db |
| 543 | * @param string[] $pages |
| 544 | * @param string $fname |
| 545 | * @return array |
| 546 | */ |
| 547 | protected static function fetchTitleInfo( IReadableDatabase $db, array $pages, $fname = __METHOD__ ) { |
| 548 | $titleInfo = []; |
| 549 | $linkBatchFactory = MediaWikiServices::getInstance()->getLinkBatchFactory(); |
| 550 | $batch = $linkBatchFactory->newLinkBatch(); |
| 551 | foreach ( $pages as $titleText ) { |
| 552 | $title = Title::newFromText( $titleText ); |
| 553 | if ( $title ) { |
| 554 | // Page name may be invalid if user-provided (e.g. gadgets) |
| 555 | $batch->addObj( $title ); |
| 556 | } |
| 557 | } |
| 558 | if ( !$batch->isEmpty() ) { |
| 559 | $res = $db->newSelectQueryBuilder() |
| 560 | // Include page_touched to allow purging if cache is poisoned (T117587, T113916) |
| 561 | ->select( [ 'page_namespace', 'page_title', 'page_touched', 'page_len', 'page_latest' ] ) |
| 562 | ->from( 'page' ) |
| 563 | ->where( $batch->constructSet( 'page', $db ) ) |
| 564 | ->caller( $fname )->fetchResultSet(); |
| 565 | foreach ( $res as $row ) { |
| 566 | // Avoid including ids or timestamps of revision/page tables so |
| 567 | // that versions are not wasted |
| 568 | $title = new TitleValue( (int)$row->page_namespace, $row->page_title ); |
| 569 | $titleInfo[self::makeTitleKey( $title )] = [ |
| 570 | 'page_len' => $row->page_len, |
| 571 | 'page_latest' => $row->page_latest, |
| 572 | 'page_touched' => ConvertibleTimestamp::convert( TS_MW, $row->page_touched ), |
| 573 | ]; |
| 574 | } |
| 575 | } |
| 576 | return $titleInfo; |
| 577 | } |
| 578 | |
| 579 | /** |
| 580 | * Batched version of WikiModule::getTitleInfo |
| 581 | * |
| 582 | * Title info for the passed modules is cached together. On index.php, OutputPage improves |
| 583 | * cache use by having one batch shared between all users (site-wide modules) and a batch |
| 584 | * for current-user modules. |
| 585 | * |
| 586 | * @since 1.28 |
| 587 | * @internal For use by ResourceLoader and OutputPage only |
| 588 | * @param Context $context |
| 589 | * @param string[] $moduleNames |
| 590 | */ |
| 591 | public static function preloadTitleInfo( |
| 592 | Context $context, array $moduleNames |
| 593 | ) { |
| 594 | $rl = $context->getResourceLoader(); |
| 595 | // getDB() can be overridden to point to a foreign database. |
| 596 | // Group pages by database to ensure we fetch titles from the correct database. |
| 597 | // By preloading both local and foreign titles, this method doesn't depend |
| 598 | // on knowing the local database. |
| 599 | |
| 600 | /** @var array<string,array{db:IReadableDatabase,pages:string[],modules:WikiModule[]}> $byDomain */ |
| 601 | $byDomain = []; |
| 602 | foreach ( $moduleNames as $name ) { |
| 603 | $module = $rl->getModule( $name ); |
| 604 | if ( $module instanceof self ) { |
| 605 | // Subclasses may implement getDB differently |
| 606 | $db = $module->getDB(); |
| 607 | $domain = $db->getDomainID(); |
| 608 | |
| 609 | $byDomain[ $domain ] ??= [ 'db' => $db, 'pages' => [], 'modules' => [] ]; |
| 610 | $byDomain[ $domain ]['pages'] = array_merge( |
| 611 | $byDomain[ $domain ]['pages'], |
| 612 | array_keys( $module->getPages( $context ) ) |
| 613 | ); |
| 614 | $byDomain[ $domain ]['modules'][] = $module; |
| 615 | } |
| 616 | } |
| 617 | |
| 618 | if ( !$byDomain ) { |
| 619 | // Nothing to preload |
| 620 | return; |
| 621 | } |
| 622 | |
| 623 | $cache = MediaWikiServices::getInstance()->getMainWANObjectCache(); |
| 624 | $fname = __METHOD__; |
| 625 | |
| 626 | foreach ( $byDomain as $domainId => $batch ) { |
| 627 | // Fetch title info |
| 628 | sort( $batch['pages'] ); |
| 629 | $pagesHash = sha1( implode( '|', $batch['pages'] ) ); |
| 630 | $allInfo = $cache->getWithSetCallback( |
| 631 | $cache->makeGlobalKey( 'resourceloader-titleinfo', $domainId, $pagesHash ), |
| 632 | $cache::TTL_HOUR, |
| 633 | static function ( $curVal, &$ttl, array &$setOpts ) use ( $batch, $fname ) { |
| 634 | $setOpts += Database::getCacheSetOptions( $batch['db'] ); |
| 635 | return static::fetchTitleInfo( $batch['db'], $batch['pages'], $fname ); |
| 636 | }, |
| 637 | [ |
| 638 | 'checkKeys' => [ |
| 639 | $cache->makeGlobalKey( 'resourceloader-titleinfo', $domainId ) ] |
| 640 | ] |
| 641 | ); |
| 642 | |
| 643 | // Inject to WikiModule objects |
| 644 | foreach ( $batch['modules'] as $wikiModule ) { |
| 645 | $pages = $wikiModule->getPages( $context ); |
| 646 | $info = []; |
| 647 | foreach ( $pages as $pageName => $unused ) { |
| 648 | // Map page name to canonical form (T145673). |
| 649 | $title = Title::newFromText( $pageName ); |
| 650 | if ( !$title ) { |
| 651 | // Page name may be invalid if user-provided (e.g. gadgets) |
| 652 | $rl->getLogger()->info( |
| 653 | 'Invalid wiki page title "{title}" in ' . __METHOD__, |
| 654 | [ 'title' => $pageName ] |
| 655 | ); |
| 656 | continue; |
| 657 | } |
| 658 | $infoKey = self::makeTitleKey( $title ); |
| 659 | if ( isset( $allInfo[$infoKey] ) ) { |
| 660 | $info[$infoKey] = $allInfo[$infoKey]; |
| 661 | } |
| 662 | } |
| 663 | $pageNames = array_keys( $pages ); |
| 664 | sort( $pageNames ); |
| 665 | $batchKey = implode( '|', $pageNames ); |
| 666 | $wikiModule->setTitleInfo( $batchKey, $info ); |
| 667 | } |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | /** |
| 672 | * Clear the preloadTitleInfo() cache for all wiki modules on this wiki on |
| 673 | * page change if it was a JS or CSS page |
| 674 | * |
| 675 | * @internal |
| 676 | * @param PageIdentity $page |
| 677 | * @param RevisionRecord|null $old Prior page revision |
| 678 | * @param RevisionRecord|null $new New page revision |
| 679 | * @param string $domain Database domain ID |
| 680 | */ |
| 681 | public static function invalidateModuleCache( |
| 682 | PageIdentity $page, |
| 683 | ?RevisionRecord $old, |
| 684 | ?RevisionRecord $new, |
| 685 | string $domain |
| 686 | ) { |
| 687 | static $models = [ CONTENT_MODEL_CSS, CONTENT_MODEL_JAVASCRIPT ]; |
| 688 | |
| 689 | $purge = false; |
| 690 | // TODO: MCR: differentiate between page functionality and content model! |
| 691 | // Not all pages containing CSS or JS have to be modules! [PageType] |
| 692 | if ( $old ) { |
| 693 | $oldModel = $old->getSlot( SlotRecord::MAIN, RevisionRecord::RAW )->getModel(); |
| 694 | if ( in_array( $oldModel, $models ) ) { |
| 695 | $purge = true; |
| 696 | } |
| 697 | } |
| 698 | |
| 699 | if ( !$purge && $new ) { |
| 700 | $newModel = $new->getSlot( SlotRecord::MAIN, RevisionRecord::RAW )->getModel(); |
| 701 | if ( in_array( $newModel, $models ) ) { |
| 702 | $purge = true; |
| 703 | } |
| 704 | } |
| 705 | |
| 706 | if ( !$purge ) { |
| 707 | $title = Title::newFromPageIdentity( $page ); |
| 708 | $purge = ( $title->isSiteConfigPage() || $title->isUserConfigPage() ); |
| 709 | } |
| 710 | |
| 711 | if ( $purge ) { |
| 712 | $cache = MediaWikiServices::getInstance()->getMainWANObjectCache(); |
| 713 | $key = $cache->makeGlobalKey( 'resourceloader-titleinfo', $domain ); |
| 714 | $cache->touchCheckKey( $key ); |
| 715 | } |
| 716 | } |
| 717 | |
| 718 | /** |
| 719 | * @since 1.28 |
| 720 | * @return string |
| 721 | */ |
| 722 | public function getType() { |
| 723 | // Check both because subclasses don't always pass pages via the constructor, |
| 724 | // they may also override getPages() instead, in which case we should keep |
| 725 | // defaulting to LOAD_GENERAL and allow them to override getType() separately. |
| 726 | return ( $this->styles && !$this->scripts ) ? self::LOAD_STYLES : self::LOAD_GENERAL; |
| 727 | } |
| 728 | } |