includes/resourceloader/ResourceLoaderStartUpModule.php

   1 <?php
   2 /**
   3  * Module for ResourceLoader initialization.
   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  * @author Trevor Parscal
  22  * @author Roan Kattouw
  23  */
  24
  25 class ResourceLoaderStartUpModule extends ResourceLoaderModule {
  26
  27         // Cache for getConfigSettings() as it's called by multiple methods
  28         protected $configVars = [];
  29         protected $targets = [ 'desktop', 'mobile' ];
  30
  31         /**
  32          * @param ResourceLoaderContext $context
  33          * @return array
  34          */
  35         protected function getConfigSettings( $context ) {
  36                 $hash = $context->getHash();
  37                 if ( isset( $this->configVars[$hash] ) ) {
  38                         return $this->configVars[$hash];
  39                 }
  40
  41                 global $wgContLang;
  42                 $conf = $this->getConfig();
  43
  44                 // We can't use Title::newMainPage() if 'mainpage' is in
  45                 // $wgForceUIMsgAsContentMsg because that will try to use the session
  46                 // user's language and we have no session user. This does the
  47                 // equivalent but falling back to our ResourceLoaderContext language
  48                 // instead.
  49                 $mainPage = Title::newFromText( $context->msg( 'mainpage' )->inContentLanguage()->text() );
  50                 if ( !$mainPage ) {
  51                         $mainPage = Title::newFromText( 'Main Page' );
  52                 }
  53
  54                 /**
  55                  * Namespace related preparation
  56                  * - wgNamespaceIds: Key-value pairs of all localized, canonical and aliases for namespaces.
  57                  * - wgCaseSensitiveNamespaces: Array of namespaces that are case-sensitive.
  58                  */
  59                 $namespaceIds = $wgContLang->getNamespaceIds();
  60                 $caseSensitiveNamespaces = [];
  61                 foreach ( MWNamespace::getCanonicalNamespaces() as $index => $name ) {
  62                         $namespaceIds[$wgContLang->lc( $name )] = $index;
  63                         if ( !MWNamespace::isCapitalized( $index ) ) {
  64                                 $caseSensitiveNamespaces[] = $index;
  65                         }
  66                 }
  67
  68                 $illegalFileChars = $conf->get( 'IllegalFileChars' );
  69                 $oldCommentSchema = $conf->get( 'CommentTableSchemaMigrationStage' ) === MIGRATION_OLD;
  70
  71                 // Build list of variables
  72                 $vars = [
  73                         'wgLoadScript' => wfScript( 'load' ),
  74                         'debug' => $context->getDebug(),
  75                         'skin' => $context->getSkin(),
  76                         'stylepath' => $conf->get( 'StylePath' ),
  77                         'wgUrlProtocols' => wfUrlProtocols(),
  78                         'wgArticlePath' => $conf->get( 'ArticlePath' ),
  79                         'wgScriptPath' => $conf->get( 'ScriptPath' ),
  80                         'wgScriptExtension' => '.php',
  81                         'wgScript' => wfScript(),
  82                         'wgSearchType' => $conf->get( 'SearchType' ),
  83                         'wgVariantArticlePath' => $conf->get( 'VariantArticlePath' ),
  84                         // Force object to avoid "empty" associative array from
  85                         // becoming [] instead of {} in JS (T36604)
  86                         'wgActionPaths' => (object)$conf->get( 'ActionPaths' ),
  87                         'wgServer' => $conf->get( 'Server' ),
  88                         'wgServerName' => $conf->get( 'ServerName' ),
  89                         'wgUserLanguage' => $context->getLanguage(),
  90                         'wgContentLanguage' => $wgContLang->getCode(),
  91                         'wgTranslateNumerals' => $conf->get( 'TranslateNumerals' ),
  92                         'wgVersion' => $conf->get( 'Version' ),
  93                         'wgEnableAPI' => $conf->get( 'EnableAPI' ),
  94                         'wgEnableWriteAPI' => $conf->get( 'EnableWriteAPI' ),
  95                         'wgMainPageTitle' => $mainPage->getPrefixedText(),
  96                         'wgFormattedNamespaces' => $wgContLang->getFormattedNamespaces(),
  97                         'wgNamespaceIds' => $namespaceIds,
  98                         'wgContentNamespaces' => MWNamespace::getContentNamespaces(),
  99                         'wgSiteName' => $conf->get( 'Sitename' ),
 100                         'wgDBname' => $conf->get( 'DBname' ),
 101                         'wgExtraSignatureNamespaces' => $conf->get( 'ExtraSignatureNamespaces' ),
 102                         'wgAvailableSkins' => Skin::getSkinNames(),
 103                         'wgExtensionAssetsPath' => $conf->get( 'ExtensionAssetsPath' ),
 104                         // MediaWiki sets cookies to have this prefix by default
 105                         'wgCookiePrefix' => $conf->get( 'CookiePrefix' ),
 106                         'wgCookieDomain' => $conf->get( 'CookieDomain' ),
 107                         'wgCookiePath' => $conf->get( 'CookiePath' ),
 108                         'wgCookieExpiration' => $conf->get( 'CookieExpiration' ),
 109                         'wgResourceLoaderMaxQueryLength' => $conf->get( 'ResourceLoaderMaxQueryLength' ),
 110                         'wgCaseSensitiveNamespaces' => $caseSensitiveNamespaces,
 111                         'wgLegalTitleChars' => Title::convertByteClassToUnicodeClass( Title::legalChars() ),
 112                         'wgIllegalFileChars' => Title::convertByteClassToUnicodeClass( $illegalFileChars ),
 113                         'wgResourceLoaderStorageVersion' => $conf->get( 'ResourceLoaderStorageVersion' ),
 114                         'wgResourceLoaderStorageEnabled' => $conf->get( 'ResourceLoaderStorageEnabled' ),
 115                         'wgForeignUploadTargets' => $conf->get( 'ForeignUploadTargets' ),
 116                         'wgEnableUploads' => $conf->get( 'EnableUploads' ),
 117                         'wgCommentByteLimit' => $oldCommentSchema ? 255 : null,
 118                         'wgCommentCodePointLimit' => $oldCommentSchema ? null : CommentStore::COMMENT_CHARACTER_LIMIT,
 119                 ];
 120
 121                 Hooks::run( 'ResourceLoaderGetConfigVars', [ &$vars ] );
 122
 123                 $this->configVars[$hash] = $vars;
 124                 return $this->configVars[$hash];
 125         }
 126
 127         /**
 128          * Recursively get all explicit and implicit dependencies for to the given module.
 129          *
 130          * @param array $registryData
 131          * @param string $moduleName
 132          * @return array
 133          */
 134         protected static function getImplicitDependencies( array $registryData, $moduleName ) {
 135                 static $dependencyCache = [];
 136
 137                 // The list of implicit dependencies won't be altered, so we can
 138                 // cache them without having to worry.
 139                 if ( !isset( $dependencyCache[$moduleName] ) ) {
 140                         if ( !isset( $registryData[$moduleName] ) ) {
 141                                 // Dependencies may not exist
 142                                 $dependencyCache[$moduleName] = [];
 143                         } else {
 144                                 $data = $registryData[$moduleName];
 145                                 $dependencyCache[$moduleName] = $data['dependencies'];
 146
 147                                 foreach ( $data['dependencies'] as $dependency ) {
 148                                         // Recursively get the dependencies of the dependencies
 149                                         $dependencyCache[$moduleName] = array_merge(
 150                                                 $dependencyCache[$moduleName],
 151                                                 self::getImplicitDependencies( $registryData, $dependency )
 152                                         );
 153                                 }
 154                         }
 155                 }
 156
 157                 return $dependencyCache[$moduleName];
 158         }
 159
 160         /**
 161          * Optimize the dependency tree in $this->modules.
 162          *
 163          * The optimization basically works like this:
 164          *      Given we have module A with the dependencies B and C
 165          *              and module B with the dependency C.
 166          *      Now we don't have to tell the client to explicitly fetch module
 167          *              C as that's already included in module B.
 168          *
 169          * This way we can reasonably reduce the amount of module registration
 170          * data send to the client.
 171          *
 172          * @param array &$registryData Modules keyed by name with properties:
 173          *  - string 'version'
 174          *  - array 'dependencies'
 175          *  - string|null 'group'
 176          *  - string 'source'
 177          */
 178         public static function compileUnresolvedDependencies( array &$registryData ) {
 179                 foreach ( $registryData as $name => &$data ) {
 180                         $dependencies = $data['dependencies'];
 181                         foreach ( $data['dependencies'] as $dependency ) {
 182                                 $implicitDependencies = self::getImplicitDependencies( $registryData, $dependency );
 183                                 $dependencies = array_diff( $dependencies, $implicitDependencies );
 184                         }
 185                         // Rebuild keys
 186                         $data['dependencies'] = array_values( $dependencies );
 187                 }
 188         }
 189
 190         /**
 191          * Get registration code for all modules.
 192          *
 193          * @param ResourceLoaderContext $context
 194          * @return string JavaScript code for registering all modules with the client loader
 195          */
 196         public function getModuleRegistrations( ResourceLoaderContext $context ) {
 197                 $resourceLoader = $context->getResourceLoader();
 198                 $target = $context->getRequest()->getVal( 'target', 'desktop' );
 199                 // Bypass target filter if this request is Special:JavaScriptTest.
 200                 // To prevent misuse in production, this is only allowed if testing is enabled server-side.
 201                 $byPassTargetFilter = $this->getConfig()->get( 'EnableJavaScriptTest' ) && $target === 'test';
 202
 203                 $out = '';
 204                 $states = [];
 205                 $registryData = [];
 206
 207                 // Get registry data
 208                 foreach ( $resourceLoader->getModuleNames() as $name ) {
 209                         $module = $resourceLoader->getModule( $name );
 210                         $moduleTargets = $module->getTargets();
 211                         if ( !$byPassTargetFilter && !in_array( $target, $moduleTargets ) ) {
 212                                 continue;
 213                         }
 214
 215                         if ( $module->isRaw() ) {
 216                                 // Don't register "raw" modules (like 'jquery' and 'mediawiki') client-side because
 217                                 // depending on them is illegal anyway and would only lead to them being reloaded
 218                                 // causing any state to be lost (like jQuery plugins, mw.config etc.)
 219                                 continue;
 220                         }
 221
 222                         try {
 223                                 $versionHash = $module->getVersionHash( $context );
 224                         } catch ( Exception $e ) {
 225                                 // See also T152266 and ResourceLoader::getCombinedVersion()
 226                                 MWExceptionHandler::logException( $e );
 227                                 $context->getLogger()->warning(
 228                                         'Calculating version for "{module}" failed: {exception}',
 229                                         [
 230                                                 'module' => $name,
 231                                                 'exception' => $e,
 232                                         ]
 233                                 );
 234                                 $versionHash = '';
 235                                 $states[$name] = 'error';
 236                         }
 237
 238                         if ( $versionHash !== '' && strlen( $versionHash ) !== 7 ) {
 239                                 $context->getLogger()->warning(
 240                                         "Module '{module}' produced an invalid version hash: '{version}'.",
 241                                         [
 242                                                 'module' => $name,
 243                                                 'version' => $versionHash,
 244                                         ]
 245                                 );
 246                                 // Module implementation either broken or deviated from ResourceLoader::makeHash
 247                                 // Asserted by tests/phpunit/structure/ResourcesTest.
 248                                 $versionHash = ResourceLoader::makeHash( $versionHash );
 249                         }
 250
 251                         $skipFunction = $module->getSkipFunction();
 252                         if ( $skipFunction !== null && !ResourceLoader::inDebugMode() ) {
 253                                 $skipFunction = ResourceLoader::filter( 'minify-js', $skipFunction );
 254                         }
 255
 256                         $registryData[$name] = [
 257                                 'version' => $versionHash,
 258                                 'dependencies' => $module->getDependencies( $context ),
 259                                 'group' => $module->getGroup(),
 260                                 'source' => $module->getSource(),
 261                                 'skip' => $skipFunction,
 262                         ];
 263                 }
 264
 265                 self::compileUnresolvedDependencies( $registryData );
 266
 267                 // Register sources
 268                 $out .= ResourceLoader::makeLoaderSourcesScript( $resourceLoader->getSources() );
 269
 270                 // Figure out the different call signatures for mw.loader.register
 271                 $registrations = [];
 272                 foreach ( $registryData as $name => $data ) {
 273                         // Call mw.loader.register(name, version, dependencies, group, source, skip)
 274                         $registrations[] = [
 275                                 $name,
 276                                 $data['version'],
 277                                 $data['dependencies'],
 278                                 $data['group'],
 279                                 // Swap default (local) for null
 280                                 $data['source'] === 'local' ? null : $data['source'],
 281                                 $data['skip']
 282                         ];
 283                 }
 284
 285                 // Register modules
 286                 $out .= "\n" . ResourceLoader::makeLoaderRegisterScript( $registrations );
 287
 288                 if ( $states ) {
 289                         $out .= "\n" . ResourceLoader::makeLoaderStateScript( $states );
 290                 }
 291
 292                 return $out;
 293         }
 294
 295         /**
 296          * @return bool
 297          */
 298         public function isRaw() {
 299                 return true;
 300         }
 301
 302         /**
 303          * @param ResourceLoaderContext $context
 304          * @return array
 305          */
 306         public function getPreloadLinks( ResourceLoaderContext $context ) {
 307                 $url = self::getStartupModulesUrl( $context );
 308                 return [
 309                         $url => [ 'as' => 'script' ]
 310                 ];
 311         }
 312
 313         /**
 314          * Base modules required for the base environment of ResourceLoader
 315          *
 316          * @return array
 317          */
 318         public static function getStartupModules() {
 319                 return [ 'jquery', 'mediawiki' ];
 320         }
 321
 322         public static function getLegacyModules() {
 323                 global $wgIncludeLegacyJavaScript;
 324
 325                 $legacyModules = [];
 326                 if ( $wgIncludeLegacyJavaScript ) {
 327                         $legacyModules[] = 'mediawiki.legacy.wikibits';
 328                 }
 329
 330                 return $legacyModules;
 331         }
 332
 333         /**
 334          * Get the load URL of the startup modules.
 335          *
 336          * This is a helper for getScript(), but can also be called standalone, such
 337          * as when generating an AppCache manifest.
 338          *
 339          * @param ResourceLoaderContext $context
 340          * @return string
 341          */
 342         public static function getStartupModulesUrl( ResourceLoaderContext $context ) {
 343                 $rl = $context->getResourceLoader();
 344                 $derivative = new DerivativeResourceLoaderContext( $context );
 345                 $derivative->setModules( array_merge(
 346                         self::getStartupModules(),
 347                         self::getLegacyModules()
 348                 ) );
 349                 $derivative->setOnly( 'scripts' );
 350                 // Must setModules() before makeVersionQuery()
 351                 $derivative->setVersion( $rl->makeVersionQuery( $derivative ) );
 352
 353                 return $rl->createLoaderURL( 'local', $derivative );
 354         }
 355
 356         /**
 357          * @param ResourceLoaderContext $context
 358          * @return string JavaScript code
 359          */
 360         public function getScript( ResourceLoaderContext $context ) {
 361                 global $IP;
 362                 if ( $context->getOnly() !== 'scripts' ) {
 363                         return '/* Requires only=script */';
 364                 }
 365
 366                 $out = file_get_contents( "$IP/resources/src/startup.js" );
 367
 368                 $pairs = array_map( function ( $value ) {
 369                         $value = FormatJson::encode( $value, ResourceLoader::inDebugMode(), FormatJson::ALL_OK );
 370                         // Fix indentation
 371                         $value = str_replace( "\n", "\n\t", $value );
 372                         return $value;
 373                 }, [
 374                         '$VARS.wgLegacyJavaScriptGlobals' => $this->getConfig()->get( 'LegacyJavaScriptGlobals' ),
 375                         '$VARS.configuration' => $this->getConfigSettings( $context ),
 376                         // This url may be preloaded. See getPreloadLinks().
 377                         '$VARS.baseModulesUri' => self::getStartupModulesUrl( $context ),
 378                 ] );
 379                 $pairs['$CODE.registrations()'] = str_replace(
 380                         "\n",
 381                         "\n\t",
 382                         trim( $this->getModuleRegistrations( $context ) )
 383                 );
 384
 385                 return strtr( $out, $pairs );
 386         }
 387
 388         /**
 389          * @return bool
 390          */
 391         public function supportsURLLoading() {
 392                 return false;
 393         }
 394
 395         /**
 396          * Get the definition summary for this module.
 397          *
 398          * @param ResourceLoaderContext $context
 399          * @return array
 400          */
 401         public function getDefinitionSummary( ResourceLoaderContext $context ) {
 402                 global $IP;
 403                 $summary = parent::getDefinitionSummary( $context );
 404                 $summary[] = [
 405                         // Detect changes to variables exposed in mw.config (T30899).
 406                         'vars' => $this->getConfigSettings( $context ),
 407                         // Changes how getScript() creates mw.Map for mw.config
 408                         'wgLegacyJavaScriptGlobals' => $this->getConfig()->get( 'LegacyJavaScriptGlobals' ),
 409                         // Detect changes to the module registrations
 410                         'moduleHashes' => $this->getAllModuleHashes( $context ),
 411
 412                         'fileMtimes' => [
 413                                 filemtime( "$IP/resources/src/startup.js" ),
 414                         ],
 415                 ];
 416                 return $summary;
 417         }
 418
 419         /**
 420          * Helper method for getDefinitionSummary().
 421          *
 422          * @param ResourceLoaderContext $context
 423          * @return string SHA-1
 424          */
 425         protected function getAllModuleHashes( ResourceLoaderContext $context ) {
 426                 $rl = $context->getResourceLoader();
 427                 // Preload for getCombinedVersion()
 428                 $rl->preloadModuleInfo( $rl->getModuleNames(), $context );
 429
 430                 // ATTENTION: Because of the line below, this is not going to cause infinite recursion.
 431                 // Think carefully before making changes to this code!
 432                 // Pre-populate versionHash with something because the loop over all modules below includes
 433                 // the startup module (this module).
 434                 // See ResourceLoaderModule::getVersionHash() for usage of this cache.
 435                 $this->versionHash[$context->getHash()] = null;
 436
 437                 return $rl->getCombinedVersion( $context, $rl->getModuleNames() );
 438         }
 439
 440         /**
 441          * @return string
 442          */
 443         public function getGroup() {
 444                 return 'startup';
 445         }
 446 }