wcfsetup/install/files/lib/system/WCF.class.php

   1 <?php
   2 declare(strict_types=1);
   3 namespace wcf\system;
   4 use wcf\data\application\Application;
   5 use wcf\data\option\OptionEditor;
   6 use wcf\data\package\Package;
   7 use wcf\data\package\PackageCache;
   8 use wcf\data\package\PackageEditor;
   9 use wcf\data\page\Page;
  10 use wcf\data\page\PageCache;
  11 use wcf\page\CmsPage;
  12 use wcf\system\application\ApplicationHandler;
  13 use wcf\system\application\IApplication;
  14 use wcf\system\box\BoxHandler;
  15 use wcf\system\cache\builder\CoreObjectCacheBuilder;
  16 use wcf\system\cache\builder\PackageUpdateCacheBuilder;
  17 use wcf\system\cronjob\CronjobScheduler;
  18 use wcf\system\database\MySQLDatabase;
  19 use wcf\system\event\EventHandler;
  20 use wcf\system\exception\AJAXException;
  21 use wcf\system\exception\ErrorException;
  22 use wcf\system\exception\IPrintableException;
  23 use wcf\system\exception\NamedUserException;
  24 use wcf\system\exception\ParentClassException;
  25 use wcf\system\exception\PermissionDeniedException;
  26 use wcf\system\exception\SystemException;
  27 use wcf\system\language\LanguageFactory;
  28 use wcf\system\package\PackageInstallationDispatcher;
  29 use wcf\system\registry\RegistryHandler;
  30 use wcf\system\request\Request;
  31 use wcf\system\request\RequestHandler;
  32 use wcf\system\session\SessionFactory;
  33 use wcf\system\session\SessionHandler;
  34 use wcf\system\style\StyleHandler;
  35 use wcf\system\template\EmailTemplateEngine;
  36 use wcf\system\template\TemplateEngine;
  37 use wcf\system\user\storage\UserStorageHandler;
  38 use wcf\util\FileUtil;
  39 use wcf\util\HeaderUtil;
  40 use wcf\util\StringUtil;
  41 use wcf\util\UserUtil;
  42
  43 // try to set a time-limit to infinite
  44 @set_time_limit(0);
  45
  46 // fix timezone warning issue
  47 if (!@ini_get('date.timezone')) {
  48         @date_default_timezone_set('Europe/London');
  49 }
  50
  51 // define current woltlab suite version
  52 define('WCF_VERSION', '3.1.2 pl 2');
  53
  54 // define current API version
  55 define('WSC_API_VERSION', 2018);
  56
  57 // define current unix timestamp
  58 define('TIME_NOW', time());
  59
  60 // wcf imports
  61 if (!defined('NO_IMPORTS')) {
  62         require_once(WCF_DIR.'lib/core.functions.php');
  63         require_once(WCF_DIR.'lib/system/api/autoload.php');
  64 }
  65
  66 /**
  67  * WCF is the central class for the WoltLab Suite Core.
  68  * It holds the database connection, access to template and language engine.
  69  *
  70  * @author      Marcel Werk
  71  * @copyright   2001-2018 WoltLab GmbH
  72  * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
  73  * @package     WoltLabSuite\Core\System
  74  */
  75 class WCF {
  76         /**
  77          * list of supported legacy API versions
  78          * @var integer[]
  79          */
  80         private static $supportedLegacyApiVersions = [2017];
  81
  82         /**
  83          * list of currently loaded applications
  84          * @var Application[]
  85          */
  86         protected static $applications = [];
  87
  88         /**
  89          * list of currently loaded application objects
  90          * @var IApplication[]
  91          */
  92         protected static $applicationObjects = [];
  93
  94         /**
  95          * list of autoload directories
  96          * @var array
  97          */
  98         protected static $autoloadDirectories = [];
  99
 100         /**
 101          * list of unique instances of each core object
 102          * @var SingletonFactory[]
 103          */
 104         protected static $coreObject = [];
 105
 106         /**
 107          * list of cached core objects
 108          * @var string[]
 109          */
 110         protected static $coreObjectCache = [];
 111
 112         /**
 113          * database object
 114          * @var MySQLDatabase
 115          */
 116         protected static $dbObj = null;
 117
 118         /**
 119          * language object
 120          * @var \wcf\data\language\Language
 121          */
 122         protected static $languageObj = null;
 123
 124         /**
 125          * overrides disabled debug mode
 126          * @var boolean
 127          */
 128         protected static $overrideDebugMode = false;
 129
 130         /**
 131          * session object
 132          * @var SessionHandler
 133          */
 134         protected static $sessionObj = null;
 135
 136         /**
 137          * template object
 138          * @var TemplateEngine
 139          */
 140         protected static $tplObj = null;
 141
 142         /**
 143          * true if Zend Opcache is loaded and enabled
 144          * @var boolean
 145          */
 146         protected static $zendOpcacheEnabled = null;
 147
 148         /**
 149          * force logout during destructor call
 150          * @var boolean
 151          */
 152         protected static $forceLogout = false;
 153
 154         /**
 155          * Calls all init functions of the WCF class.
 156          */
 157         public function __construct() {
 158                 // add autoload directory
 159                 self::$autoloadDirectories['wcf'] = WCF_DIR . 'lib/';
 160
 161                 // define tmp directory
 162                 if (!defined('TMP_DIR')) define('TMP_DIR', FileUtil::getTempFolder());
 163
 164                 // start initialization
 165                 $this->initDB();
 166                 $this->loadOptions();
 167                 $this->initSession();
 168                 $this->initLanguage();
 169                 $this->initTPL();
 170                 $this->initCronjobs();
 171                 $this->initCoreObjects();
 172                 $this->initApplications();
 173                 $this->initBlacklist();
 174
 175                 EventHandler::getInstance()->fireAction($this, 'initialized');
 176         }
 177
 178         /**
 179          * Flushes the output, closes the session, performs background tasks and more.
 180          *
 181          * You *must* not create output in here under normal circumstances, as it might get eaten
 182          * when gzip is enabled.
 183          */
 184         public static function destruct() {
 185                 try {
 186                         // database has to be initialized
 187                         if (!is_object(self::$dbObj)) return;
 188
 189                         $debug = self::debugModeIsEnabled(true);
 190                         if (!$debug) {
 191                                 // flush output
 192                                 if (ob_get_level()) ob_end_flush();
 193                                 flush();
 194
 195                                 // close connection if using FPM
 196                                 if (function_exists('fastcgi_finish_request')) fastcgi_finish_request();
 197                         }
 198
 199                         // update session
 200                         if (is_object(self::getSession())) {
 201                                 if (self::$forceLogout) {
 202                                         // do logout
 203                                         self::getSession()->delete();
 204                                 }
 205                                 else {
 206                                         self::getSession()->update();
 207                                 }
 208                         }
 209
 210                         // execute shutdown actions of storage handlers
 211                         RegistryHandler::getInstance()->shutdown();
 212                         UserStorageHandler::getInstance()->shutdown();
 213                 }
 214                 catch (\Exception $exception) {
 215                         die("<pre>WCF::destruct() Unhandled exception: ".$exception->getMessage()."\n\n".$exception->getTraceAsString());
 216                 }
 217         }
 218
 219         /**
 220          * Returns the database object.
 221          *
 222          * @return      \wcf\system\database\Database
 223          */
 224         public static final function getDB() {
 225                 return self::$dbObj;
 226         }
 227
 228         /**
 229          * Returns the session object.
 230          *
 231          * @return      SessionHandler
 232          */
 233         public static final function getSession() {
 234                 return self::$sessionObj;
 235         }
 236
 237         /**
 238          * Returns the user object.
 239          *
 240          * @return      \wcf\data\user\User
 241          */
 242         public static final function getUser() {
 243                 return self::getSession()->getUser();
 244         }
 245
 246         /**
 247          * Returns the language object.
 248          *
 249          * @return      \wcf\data\language\Language
 250          */
 251         public static final function getLanguage() {
 252                 return self::$languageObj;
 253         }
 254
 255         /**
 256          * Returns the template object.
 257          *
 258          * @return      TemplateEngine
 259          */
 260         public static final function getTPL() {
 261                 return self::$tplObj;
 262         }
 263
 264         /**
 265          * Calls the show method on the given exception.
 266          *
 267          * @param       \Exception      $e
 268          */
 269         public static final function handleException($e) {
 270                 // backwards compatibility
 271                 if ($e instanceof IPrintableException) {
 272                         $e->show();
 273                         exit;
 274                 }
 275
 276                 if (ob_get_level()) {
 277                         // discard any output generated before the exception occurred, prevents exception
 278                         // being hidden inside HTML elements and therefore not visible in browser output
 279                         //
 280                         // ob_get_level() can return values > 1, if the PHP setting `output_buffering` is on
 281                         while (ob_get_level()) ob_end_clean();
 282
 283                         // Some webservers are broken and will apply gzip encoding at all cost, but they fail
 284                         // to set a proper `Content-Encoding` HTTP header and mess things up even more.
 285                         // Especially the `identity` value appears to be unrecognized by some of them, hence
 286                         // we'll just gzip the output of the exception to prevent them from tampering.
 287                         // This part is copied from `HeaderUtil` in order to isolate the exception handler!
 288                         if (HTTP_ENABLE_GZIP && !defined('HTTP_DISABLE_GZIP')) {
 289                                 if (function_exists('gzcompress') && !@ini_get('zlib.output_compression') && !@ini_get('output_handler') && isset($_SERVER['HTTP_ACCEPT_ENCODING']) && strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip')) {
 290                                         if (strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'x-gzip')) {
 291                                                 @header('Content-Encoding: x-gzip');
 292                                         }
 293                                         else {
 294                                                 @header('Content-Encoding: gzip');
 295                                         }
 296
 297                                         ob_start(function($output) {
 298                                                 $size = strlen($output);
 299                                                 $crc = crc32($output);
 300
 301                                                 $newOutput = "\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff";
 302                                                 $newOutput .= substr(gzcompress($output, 1), 2, -4);
 303                                                 $newOutput .= pack('V', $crc);
 304                                                 $newOutput .= pack('V', $size);
 305
 306                                                 return $newOutput;
 307                                         });
 308                                 }
 309                         }
 310                 }
 311
 312                 @header('HTTP/1.1 503 Service Unavailable');
 313                 try {
 314                         \wcf\functions\exception\printThrowable($e);
 315                 }
 316                 catch (\Throwable $e2) {
 317                         echo "<pre>An Exception was thrown while handling an Exception:\n\n";
 318                         echo preg_replace('/Database->__construct\(.*\)/', 'Database->__construct(...)', $e2);
 319                         echo "\n\nwas thrown while:\n\n";
 320                         echo preg_replace('/Database->__construct\(.*\)/', 'Database->__construct(...)', $e);
 321                         echo "\n\nwas handled.</pre>";
 322                         exit;
 323                 }
 324         }
 325
 326         /**
 327          * Turns PHP errors into an ErrorException.
 328          *
 329          * @param       integer         $severity
 330          * @param       string          $message
 331          * @param       string          $file
 332          * @param       integer         $line
 333          * @throws      ErrorException
 334          */
 335         public static final function handleError($severity, $message, $file, $line) {
 336                 // this is necessary for the shut-up operator
 337                 if (error_reporting() == 0) return;
 338
 339                 throw new ErrorException($message, 0, $severity, $file, $line);
 340         }
 341
 342         /**
 343          * Loads the database configuration and creates a new connection to the database.
 344          */
 345         protected function initDB() {
 346                 // get configuration
 347                 $dbHost = $dbUser = $dbPassword = $dbName = '';
 348                 $dbPort = 0;
 349                 require(WCF_DIR.'config.inc.php');
 350
 351                 // create database connection
 352                 self::$dbObj = new MySQLDatabase($dbHost, $dbUser, $dbPassword, $dbName, $dbPort);
 353         }
 354
 355         /**
 356          * Loads the options file, automatically created if not exists.
 357          */
 358         protected function loadOptions() {
 359                 $filename = WCF_DIR.'options.inc.php';
 360
 361                 // create options file if doesn't exist
 362                 if (!file_exists($filename) || filemtime($filename) <= 1) {
 363                         OptionEditor::rebuild();
 364                 }
 365                 require_once($filename);
 366
 367                 // check if option file is complete and writable
 368                 if (PACKAGE_ID) {
 369                         if (!is_writable($filename)) {
 370                                 FileUtil::makeWritable($filename);
 371
 372                                 if (!is_writable($filename)) {
 373                                         throw new SystemException("The option file '" . $filename . "' is not writable.");
 374                                 }
 375                         }
 376
 377                         // check if a previous write operation was incomplete and force rebuilding
 378                         if (!defined('WCF_OPTION_INC_PHP_SUCCESS')) {
 379                                 OptionEditor::rebuild();
 380
 381                                 require_once($filename);
 382                         }
 383                 }
 384         }
 385
 386         /**
 387          * Starts the session system.
 388          */
 389         protected function initSession() {
 390                 $factory = new SessionFactory();
 391                 $factory->load();
 392
 393                 self::$sessionObj = SessionHandler::getInstance();
 394                 self::$sessionObj->setHasValidCookie($factory->hasValidCookie());
 395         }
 396
 397         /**
 398          * Initialises the language engine.
 399          */
 400         protected function initLanguage() {
 401                 if (isset($_GET['l']) && !self::getUser()->userID) {
 402                         self::getSession()->setLanguageID(intval($_GET['l']));
 403                 }
 404
 405                 // set mb settings
 406                 mb_internal_encoding('UTF-8');
 407                 if (function_exists('mb_regex_encoding')) mb_regex_encoding('UTF-8');
 408                 mb_language('uni');
 409
 410                 // get language
 411                 self::$languageObj = LanguageFactory::getInstance()->getUserLanguage(self::getSession()->getLanguageID());
 412         }
 413
 414         /**
 415          * Initialises the template engine.
 416          */
 417         protected function initTPL() {
 418                 self::$tplObj = TemplateEngine::getInstance();
 419                 self::getTPL()->setLanguageID(self::getLanguage()->languageID);
 420                 $this->assignDefaultTemplateVariables();
 421
 422                 $this->initStyle();
 423         }
 424
 425         /**
 426          * Initializes the user's style.
 427          */
 428         protected function initStyle() {
 429                 if (isset($_REQUEST['styleID'])) {
 430                         self::getSession()->setStyleID(intval($_REQUEST['styleID']));
 431                 }
 432
 433                 $styleHandler = StyleHandler::getInstance();
 434                 $styleHandler->changeStyle(self::getSession()->getStyleID());
 435         }
 436
 437         /**
 438          * Executes the blacklist.
 439          */
 440         protected function initBlacklist() {
 441                 $isAjax = isset($_SERVER['HTTP_X_REQUESTED_WITH']) && ($_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest');
 442
 443                 if (defined('BLACKLIST_IP_ADDRESSES') && BLACKLIST_IP_ADDRESSES != '') {
 444                         if (!StringUtil::executeWordFilter(UserUtil::convertIPv6To4(self::getSession()->ipAddress), BLACKLIST_IP_ADDRESSES)) {
 445                                 if ($isAjax) {
 446                                         throw new AJAXException(self::getLanguage()->getDynamicVariable('wcf.ajax.error.permissionDenied'), AJAXException::INSUFFICIENT_PERMISSIONS);
 447                                 }
 448                                 else {
 449                                         throw new PermissionDeniedException();
 450                                 }
 451                         }
 452                         else if (!StringUtil::executeWordFilter(self::getSession()->ipAddress, BLACKLIST_IP_ADDRESSES)) {
 453                                 if ($isAjax) {
 454                                         throw new AJAXException(self::getLanguage()->getDynamicVariable('wcf.ajax.error.permissionDenied'), AJAXException::INSUFFICIENT_PERMISSIONS);
 455                                 }
 456                                 else {
 457                                         throw new PermissionDeniedException();
 458                                 }
 459                         }
 460                 }
 461                 if (defined('BLACKLIST_USER_AGENTS') && BLACKLIST_USER_AGENTS != '') {
 462                         if (!StringUtil::executeWordFilter(self::getSession()->userAgent, BLACKLIST_USER_AGENTS)) {
 463                                 if ($isAjax) {
 464                                         throw new AJAXException(self::getLanguage()->getDynamicVariable('wcf.ajax.error.permissionDenied'), AJAXException::INSUFFICIENT_PERMISSIONS);
 465                                 }
 466                                 else {
 467                                         throw new PermissionDeniedException();
 468                                 }
 469                         }
 470                 }
 471                 if (defined('BLACKLIST_HOSTNAMES') && BLACKLIST_HOSTNAMES != '') {
 472                         if (!StringUtil::executeWordFilter(@gethostbyaddr(self::getSession()->ipAddress), BLACKLIST_HOSTNAMES)) {
 473                                 if ($isAjax) {
 474                                         throw new AJAXException(self::getLanguage()->getDynamicVariable('wcf.ajax.error.permissionDenied'), AJAXException::INSUFFICIENT_PERMISSIONS);
 475                                 }
 476                                 else {
 477                                         throw new PermissionDeniedException();
 478                                 }
 479                         }
 480                 }
 481
 482                 // handle banned users
 483                 if (self::getUser()->userID && self::getUser()->banned) {
 484                         if ($isAjax) {
 485                                 throw new AJAXException(self::getLanguage()->getDynamicVariable('wcf.user.error.isBanned'), AJAXException::INSUFFICIENT_PERMISSIONS);
 486                         }
 487                         else {
 488                                 self::$forceLogout = true;
 489
 490                                 // remove cookies
 491                                 if (isset($_COOKIE[COOKIE_PREFIX.'userID'])) {
 492                                         HeaderUtil::setCookie('userID', 0);
 493                                 }
 494                                 if (isset($_COOKIE[COOKIE_PREFIX.'password'])) {
 495                                         HeaderUtil::setCookie('password', '');
 496                                 }
 497
 498                                 throw new NamedUserException(self::getLanguage()->getDynamicVariable('wcf.user.error.isBanned'));
 499                         }
 500                 }
 501         }
 502
 503         /**
 504          * Initializes applications.
 505          */
 506         protected function initApplications() {
 507                 // step 1) load all applications
 508                 $loadedApplications = [];
 509
 510                 // register WCF as application
 511                 self::$applications['wcf'] = ApplicationHandler::getInstance()->getApplicationByID(1);
 512
 513                 if (!class_exists(WCFACP::class, false)) {
 514                         static::getTPL()->assign('baseHref', self::$applications['wcf']->getPageURL());
 515                 }
 516
 517                 // start main application
 518                 $application = ApplicationHandler::getInstance()->getActiveApplication();
 519                 if ($application->packageID != 1) {
 520                         $loadedApplications[] = $this->loadApplication($application);
 521
 522                         // register primary application
 523                         $abbreviation = ApplicationHandler::getInstance()->getAbbreviation($application->packageID);
 524                         self::$applications[$abbreviation] = $application;
 525                 }
 526
 527                 // start dependent applications
 528                 $applications = ApplicationHandler::getInstance()->getDependentApplications();
 529                 foreach ($applications as $application) {
 530                         if ($application->packageID == 1) {
 531                                 // ignore WCF
 532                                 continue;
 533                         }
 534                         else if ($application->isTainted) {
 535                                 // ignore apps flagged for uninstallation
 536                                 continue;
 537                         }
 538
 539                         $loadedApplications[] = $this->loadApplication($application, true);
 540                 }
 541
 542                 // step 2) run each application
 543                 if (!class_exists('wcf\system\WCFACP', false)) {
 544                         /** @var IApplication $application */
 545                         foreach ($loadedApplications as $application) {
 546                                 $application->__run();
 547                         }
 548
 549                         // refresh the session 1 minute before it expires
 550                         self::getTPL()->assign('__sessionKeepAlive', SESSION_TIMEOUT - 60);
 551                 }
 552         }
 553
 554         /**
 555          * Loads an application.
 556          *
 557          * @param       Application             $application
 558          * @param       boolean                 $isDependentApplication
 559          * @return      IApplication
 560          * @throws      SystemException
 561          */
 562         protected function loadApplication(Application $application, $isDependentApplication = false) {
 563                 $package = PackageCache::getInstance()->getPackage($application->packageID);
 564                 // package cache might be outdated
 565                 if ($package === null) {
 566                         $package = new Package($application->packageID);
 567
 568                         // package cache is outdated, discard cache
 569                         if ($package->packageID) {
 570                                 PackageEditor::resetCache();
 571                         }
 572                         else {
 573                                 // package id is invalid
 574                                 throw new SystemException("application identified by package id '".$application->packageID."' is unknown");
 575                         }
 576                 }
 577
 578                 $abbreviation = ApplicationHandler::getInstance()->getAbbreviation($application->packageID);
 579                 $packageDir = FileUtil::getRealPath(WCF_DIR.$package->packageDir);
 580                 self::$autoloadDirectories[$abbreviation] = $packageDir . 'lib/';
 581
 582                 $className = $abbreviation.'\system\\'.strtoupper($abbreviation).'Core';
 583
 584                 // class was not found, possibly the app was moved, but `packageDir` has not been adjusted
 585                 if (!class_exists($className)) {
 586                         // check if both the Core and the app are on the same domain
 587                         $coreApp = ApplicationHandler::getInstance()->getApplicationByID(1);
 588                         if ($coreApp->domainName === $application->domainName) {
 589                                 // resolve the relative path and use it to construct the autoload directory
 590                                 $relativePath = FileUtil::getRelativePath($coreApp->domainPath, $application->domainPath);
 591                                 if ($relativePath !== './') {
 592                                         $packageDir = FileUtil::getRealPath(WCF_DIR.$relativePath);
 593                                         self::$autoloadDirectories[$abbreviation] = $packageDir . 'lib/';
 594
 595                                         if (class_exists($className)) {
 596                                                 // the class can now be found, update the `packageDir` value
 597                                                 (new PackageEditor($package))->update(['packageDir' => $relativePath]);
 598                                         }
 599                                 }
 600                         }
 601                 }
 602
 603                 if (class_exists($className) && is_subclass_of($className, IApplication::class)) {
 604                         // include config file
 605                         $configPath = $packageDir . PackageInstallationDispatcher::CONFIG_FILE;
 606                         if (!file_exists($configPath)) {
 607                                 Package::writeConfigFile($package->packageID);
 608                         }
 609
 610                         if (file_exists($configPath)) {
 611                                 require_once($configPath);
 612                         }
 613                         else {
 614                                 throw new SystemException('Unable to load configuration for '.$package->package);
 615                         }
 616
 617                         // register template path if not within ACP
 618                         if (!class_exists('wcf\system\WCFACP', false)) {
 619                                 // add template path and abbreviation
 620                                 static::getTPL()->addApplication($abbreviation, $packageDir . 'templates/');
 621                         }
 622                         EmailTemplateEngine::getInstance()->addApplication($abbreviation, $packageDir . 'templates/');
 623
 624                         // init application and assign it as template variable
 625                         self::$applicationObjects[$application->packageID] = call_user_func([$className, 'getInstance']);
 626                         static::getTPL()->assign('__'.$abbreviation, self::$applicationObjects[$application->packageID]);
 627                         EmailTemplateEngine::getInstance()->assign('__'.$abbreviation, self::$applicationObjects[$application->packageID]);
 628                 }
 629                 else {
 630                         unset(self::$autoloadDirectories[$abbreviation]);
 631                         throw new SystemException("Unable to run '".$package->package."', '".$className."' is missing or does not implement '".IApplication::class."'.");
 632                 }
 633
 634                 // register template path in ACP
 635                 if (class_exists('wcf\system\WCFACP', false)) {
 636                         static::getTPL()->addApplication($abbreviation, $packageDir . 'acp/templates/');
 637                 }
 638                 else if (!$isDependentApplication) {
 639                         // assign base tag
 640                         static::getTPL()->assign('baseHref', $application->getPageURL());
 641                 }
 642
 643                 // register application
 644                 self::$applications[$abbreviation] = $application;
 645
 646                 return self::$applicationObjects[$application->packageID];
 647         }
 648
 649         /**
 650          * Returns the corresponding application object. Does not support the 'wcf' pseudo application.
 651          *
 652          * @param       Application     $application
 653          * @return      IApplication
 654          */
 655         public static function getApplicationObject(Application $application) {
 656                 if (isset(self::$applicationObjects[$application->packageID])) {
 657                         return self::$applicationObjects[$application->packageID];
 658                 }
 659
 660                 return null;
 661         }
 662
 663         /**
 664          * Returns the invoked application.
 665          *
 666          * @return      Application
 667          */
 668         public static function getActiveApplication() {
 669                 return ApplicationHandler::getInstance()->getActiveApplication();
 670         }
 671
 672         /**
 673          * Loads an application on runtime, do not use this outside the package installation.
 674          *
 675          * @param       integer         $packageID
 676          */
 677         public static function loadRuntimeApplication($packageID) {
 678                 $package = new Package($packageID);
 679                 $application = new Application($packageID);
 680
 681                 $abbreviation = Package::getAbbreviation($package->package);
 682                 $packageDir = FileUtil::getRealPath(WCF_DIR.$package->packageDir);
 683                 self::$autoloadDirectories[$abbreviation] = $packageDir . 'lib/';
 684                 self::$applications[$abbreviation] = $application;
 685                 self::getTPL()->addApplication($abbreviation, $packageDir . 'acp/templates/');
 686         }
 687
 688         /**
 689          * Initializes core object cache.
 690          */
 691         protected function initCoreObjects() {
 692                 // ignore core objects if installing WCF
 693                 if (PACKAGE_ID == 0) {
 694                         return;
 695                 }
 696
 697                 self::$coreObjectCache = CoreObjectCacheBuilder::getInstance()->getData();
 698         }
 699
 700         /**
 701          * Assigns some default variables to the template engine.
 702          */
 703         protected function assignDefaultTemplateVariables() {
 704                 self::getTPL()->registerPrefilter(['event', 'hascontent', 'lang']);
 705                 self::getTPL()->assign([
 706                         '__wcf' => $this,
 707                         '__wcfVersion' => LAST_UPDATE_TIME // @deprecated 2.1, use LAST_UPDATE_TIME directly
 708                 ]);
 709
 710                 $isAjax = isset($_SERVER['HTTP_X_REQUESTED_WITH']) && ($_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest');
 711                 // Execute background queue in this request, if it was requested and AJAX isn't used.
 712                 if (!$isAjax) {
 713                         if (self::getSession()->getVar('forceBackgroundQueuePerform')) {
 714                                 self::getTPL()->assign([
 715                                         'forceBackgroundQueuePerform' => true
 716                                 ]);
 717
 718                                 self::getSession()->unregister('forceBackgroundQueuePerform');
 719                         }
 720                 }
 721
 722                 EmailTemplateEngine::getInstance()->registerPrefilter(['event', 'hascontent', 'lang']);
 723                 EmailTemplateEngine::getInstance()->assign([
 724                         '__wcf' => $this
 725                 ]);
 726         }
 727
 728         /**
 729          * Wrapper for the getter methods of this class.
 730          *
 731          * @param       string          $name
 732          * @return      mixed           value
 733          * @throws      SystemException
 734          */
 735         public function __get($name) {
 736                 $method = 'get'.ucfirst($name);
 737                 if (method_exists($this, $method)) {
 738                         return $this->$method();
 739                 }
 740
 741                 throw new SystemException("method '".$method."' does not exist in class WCF");
 742         }
 743
 744         /**
 745          * Returns true if current application (WCF) is treated as active and was invoked directly.
 746          *
 747          * @return      boolean
 748          */
 749         public function isActiveApplication() {
 750                 return (ApplicationHandler::getInstance()->getActiveApplication()->packageID == 1);
 751         }
 752
 753         /**
 754          * Changes the active language.
 755          *
 756          * @param       integer         $languageID
 757          */
 758         public static final function setLanguage($languageID) {
 759                 if (!$languageID || LanguageFactory::getInstance()->getLanguage($languageID) === null) {
 760                         $languageID = LanguageFactory::getInstance()->getDefaultLanguageID();
 761                 }
 762
 763                 self::$languageObj = LanguageFactory::getInstance()->getLanguage($languageID);
 764
 765                 // the template engine may not be available yet, usually happens when
 766                 // changing the user (and thus the language id) during session init
 767                 if (self::$tplObj !== null) {
 768                         self::getTPL()->setLanguageID(self::getLanguage()->languageID);
 769                         EmailTemplateEngine::getInstance()->setLanguageID(self::getLanguage()->languageID);
 770                 }
 771         }
 772
 773         /**
 774          * Includes the required util or exception classes automatically.
 775          *
 776          * @param       string          $className
 777          * @see         spl_autoload_register()
 778          */
 779         public static final function autoload($className) {
 780                 $namespaces = explode('\\', $className);
 781                 if (count($namespaces) > 1) {
 782                         $applicationPrefix = array_shift($namespaces);
 783                         if ($applicationPrefix === '') {
 784                                 $applicationPrefix = array_shift($namespaces);
 785                         }
 786                         if (isset(self::$autoloadDirectories[$applicationPrefix])) {
 787                                 $classPath = self::$autoloadDirectories[$applicationPrefix] . implode('/', $namespaces) . '.class.php';
 788                                 if (file_exists($classPath)) {
 789                                         require_once($classPath);
 790                                 }
 791                         }
 792                 }
 793         }
 794
 795         /**
 796          * @inheritDoc
 797          */
 798         public final function __call($name, array $arguments) {
 799                 // bug fix to avoid php crash, see http://bugs.php.net/bug.php?id=55020
 800                 if (!method_exists($this, $name)) {
 801                         return self::__callStatic($name, $arguments);
 802                 }
 803
 804                 return $this->$name($arguments);
 805         }
 806
 807         /**
 808          * Returns dynamically loaded core objects.
 809          *
 810          * @param       string          $name
 811          * @param       array           $arguments
 812          * @return      object
 813          * @throws      SystemException
 814          */
 815         public static final function __callStatic($name, array $arguments) {
 816                 $className = preg_replace('~^get~', '', $name);
 817
 818                 if (isset(self::$coreObject[$className])) {
 819                         return self::$coreObject[$className];
 820                 }
 821
 822                 $objectName = self::getCoreObject($className);
 823                 if ($objectName === null) {
 824                         throw new SystemException("Core object '".$className."' is unknown.");
 825                 }
 826
 827                 if (class_exists($objectName)) {
 828                         if (!is_subclass_of($objectName, SingletonFactory::class)) {
 829                                 throw new ParentClassException($objectName, SingletonFactory::class);
 830                         }
 831
 832                         self::$coreObject[$className] = call_user_func([$objectName, 'getInstance']);
 833                         return self::$coreObject[$className];
 834                 }
 835         }
 836
 837         /**
 838          * Searches for cached core object definition.
 839          *
 840          * @param       string          $className
 841          * @return      string
 842          */
 843         protected static final function getCoreObject($className) {
 844                 if (isset(self::$coreObjectCache[$className])) {
 845                         return self::$coreObjectCache[$className];
 846                 }
 847
 848                 return null;
 849         }
 850
 851         /**
 852          * Returns true if the debug mode is enabled, otherwise false.
 853          *
 854          * @param       boolean         $ignoreACP
 855          * @return      boolean
 856          */
 857         public static function debugModeIsEnabled($ignoreACP = false) {
 858                 // ACP override
 859                 if (!$ignoreACP && self::$overrideDebugMode) {
 860                         return true;
 861                 }
 862                 else if (defined('ENABLE_DEBUG_MODE') && ENABLE_DEBUG_MODE) {
 863                         return true;
 864                 }
 865
 866                 return false;
 867         }
 868
 869         /**
 870          * Returns true if benchmarking is enabled, otherwise false.
 871          *
 872          * @return      boolean
 873          */
 874         public static function benchmarkIsEnabled() {
 875                 // benchmarking is enabled by default
 876                 if (!defined('ENABLE_BENCHMARK') || ENABLE_BENCHMARK) return true;
 877                 return false;
 878         }
 879
 880         /**
 881          * Returns domain path for given application.
 882          *
 883          * @param       string          $abbreviation
 884          * @return      string
 885          */
 886         public static function getPath($abbreviation = 'wcf') {
 887                 // workaround during WCFSetup
 888                 if (!PACKAGE_ID) {
 889                         return '../';
 890                 }
 891
 892                 if (!isset(self::$applications[$abbreviation])) {
 893                         $abbreviation = 'wcf';
 894                 }
 895
 896                 return self::$applications[$abbreviation]->getPageURL();
 897         }
 898
 899         /**
 900          * Returns the domain path for the currently active application,
 901          * used to avoid CORS requests.
 902          *
 903          * @return      string
 904          */
 905         public static function getActivePath() {
 906                 if (!PACKAGE_ID) {
 907                         return self::getPath();
 908                 }
 909
 910                 return self::getPath(ApplicationHandler::getInstance()->getAbbreviation(ApplicationHandler::getInstance()->getActiveApplication()->packageID));
 911         }
 912
 913         /**
 914          * Returns a fully qualified anchor for current page.
 915          *
 916          * @param       string          $fragment
 917          * @return      string
 918          */
 919         public function getAnchor($fragment) {
 920                 return StringUtil::encodeHTML(self::getRequestURI() . '#' . $fragment);
 921         }
 922
 923         /**
 924          * Returns the currently active page or null if unknown.
 925          *
 926          * @return      Page|null
 927          */
 928         public static function getActivePage() {
 929                 if (self::getActiveRequest() === null) {
 930                         return null;
 931                 }
 932
 933                 if (self::getActiveRequest()->getClassName() === CmsPage::class) {
 934                         $metaData = self::getActiveRequest()->getMetaData();
 935                         if (isset($metaData['cms'])) {
 936                                 return PageCache::getInstance()->getPage($metaData['cms']['pageID']);
 937                         }
 938
 939                         return null;
 940                 }
 941
 942                 return PageCache::getInstance()->getPageByController(self::getActiveRequest()->getClassName());
 943         }
 944
 945         /**
 946          * Returns the currently active request.
 947          *
 948          * @return Request
 949          */
 950         public static function getActiveRequest() {
 951                 return RequestHandler::getInstance()->getActiveRequest();
 952         }
 953
 954         /**
 955          * Returns the URI of the current page.
 956          *
 957          * @return      string
 958          */
 959         public static function getRequestURI() {
 960                 return preg_replace('~^(https?://[^/]+)(?:/.*)?$~', '$1', self::getTPL()->get('baseHref')) . $_SERVER['REQUEST_URI'];
 961         }
 962
 963         /**
 964          * Resets Zend Opcache cache if installed and enabled.
 965          *
 966          * @param       string          $script
 967          */
 968         public static function resetZendOpcache($script = '') {
 969                 if (self::$zendOpcacheEnabled === null) {
 970                         self::$zendOpcacheEnabled = false;
 971
 972                         if (extension_loaded('Zend Opcache') && @ini_get('opcache.enable')) {
 973                                 self::$zendOpcacheEnabled = true;
 974                         }
 975
 976                 }
 977
 978                 if (self::$zendOpcacheEnabled) {
 979                         if (empty($script)) {
 980                                 opcache_reset();
 981                         }
 982                         else {
 983                                 opcache_invalidate($script, true);
 984                         }
 985                 }
 986         }
 987
 988         /**
 989          * Returns style handler.
 990          *
 991          * @return      StyleHandler
 992          */
 993         public function getStyleHandler() {
 994                 return StyleHandler::getInstance();
 995         }
 996
 997         /**
 998          * Returns box handler.
 999          *
1000          * @return      BoxHandler
1001          * @since       3.0
1002          */
1003         public function getBoxHandler() {
1004                 return BoxHandler::getInstance();
1005         }
1006
1007         /**
1008          * Returns number of available updates.
1009          *
1010          * @return      integer
1011          */
1012         public function getAvailableUpdates() {
1013                 $data = PackageUpdateCacheBuilder::getInstance()->getData();
1014                 return $data['updates'];
1015         }
1016
1017         /**
1018          * Returns a 8 character prefix for editor autosave.
1019          *
1020          * @return      string
1021          */
1022         public function getAutosavePrefix() {
1023                 return substr(sha1(preg_replace('~^https~', 'http', self::getPath())), 0, 8);
1024         }
1025
1026         /**
1027          * Returns the favicon URL or a base64 encoded image.
1028          *
1029          * @return      string
1030          */
1031         public function getFavicon() {
1032                 $activeApplication = ApplicationHandler::getInstance()->getActiveApplication();
1033                 $wcf = ApplicationHandler::getInstance()->getWCF();
1034                 $favicon = StyleHandler::getInstance()->getStyle()->getRelativeFavicon();
1035
1036                 if ($activeApplication->domainName !== $wcf->domainName) {
1037                         if (file_exists(WCF_DIR.$favicon)) {
1038                                 $favicon = file_get_contents(WCF_DIR.$favicon);
1039
1040                                 return 'data:image/x-icon;base64,' . base64_encode($favicon);
1041                         }
1042                 }
1043
1044                 return self::getPath() . $favicon;
1045         }
1046
1047         /**
1048          * Returns true if the desktop notifications should be enabled.
1049          *
1050          * @return      boolean
1051          */
1052         public function useDesktopNotifications() {
1053                 if (!ENABLE_DESKTOP_NOTIFICATIONS) {
1054                         return false;
1055                 }
1056                 else if (ApplicationHandler::getInstance()->isMultiDomainSetup()) {
1057                         $application = ApplicationHandler::getInstance()->getApplicationByID(DESKTOP_NOTIFICATION_PACKAGE_ID);
1058                         // mismatch, default to Core
1059                         if ($application === null) $application = ApplicationHandler::getInstance()->getApplicationByID(1);
1060
1061                         $currentApplication = ApplicationHandler::getInstance()->getActiveApplication();
1062                         if ($currentApplication->domainName != $application->domainName) {
1063                                 // different domain
1064                                 return false;
1065                         }
1066                 }
1067
1068                 return true;
1069         }
1070
1071         /**
1072          * Returns true if currently active request represents the landing page.
1073          *
1074          * @return      boolean
1075          */
1076         public static function isLandingPage() {
1077                 if (self::getActiveRequest() === null) {
1078                         return false;
1079                 }
1080
1081                 return self::getActiveRequest()->isLandingPage();
1082         }
1083
1084         /**
1085          * Returns true if the given API version is currently supported.
1086          *
1087          * @param       integer         $apiVersion
1088          * @return      boolean
1089          */
1090         public static function isSupportedApiVersion($apiVersion) {
1091                 return ($apiVersion == WSC_API_VERSION) || in_array($apiVersion, self::$supportedLegacyApiVersions);
1092         }
1093
1094         /**
1095          * Returns the list of supported legacy API versions.
1096          *
1097          * @return      integer[]
1098          */
1099         public static function getSupportedLegacyApiVersions() {
1100                 return self::$supportedLegacyApiVersions;
1101         }
1102
1103         /**
1104          * Initialises the cronjobs.
1105          */
1106         protected function initCronjobs() {
1107                 if (PACKAGE_ID) {
1108                         self::getTPL()->assign('executeCronjobs', CronjobScheduler::getInstance()->getNextExec() < TIME_NOW && defined('OFFLINE') && !OFFLINE);
1109                 }
1110         }
1111 }