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