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

   1 <?php
   2 namespace wcf\system;
   3 use wcf\data\application\Application;
   4 use wcf\data\option\OptionEditor;
   5 use wcf\data\package\Package;
   6 use wcf\data\package\PackageCache;
   7 use wcf\data\package\PackageEditor;
   8 use wcf\data\page\Page;
   9 use wcf\data\page\PageCache;
  10 use wcf\page\CmsPage;
  11 use wcf\system\application\ApplicationHandler;
  12 use wcf\system\application\IApplication;
  13 use wcf\system\box\BoxHandler;
  14 use wcf\system\cache\builder\CoreObjectCacheBuilder;
  15 use wcf\system\cache\builder\PackageUpdateCacheBuilder;
  16 use wcf\system\cronjob\CronjobScheduler;
  17 use wcf\system\database\MySQLDatabase;
  18 use wcf\system\event\EventHandler;
  19 use wcf\system\exception\AJAXException;
  20 use wcf\system\exception\ErrorException;
  21 use wcf\system\exception\IPrintableException;
  22 use wcf\system\exception\NamedUserException;
  23 use wcf\system\exception\ParentClassException;
  24 use wcf\system\exception\PermissionDeniedException;
  25 use wcf\system\exception\SystemException;
  26 use wcf\system\language\LanguageFactory;
  27 use wcf\system\package\PackageInstallationDispatcher;
  28 use wcf\system\registry\RegistryHandler;
  29 use wcf\system\request\Request;
  30 use wcf\system\request\RequestHandler;
  31 use wcf\system\session\SessionFactory;
  32 use wcf\system\session\SessionHandler;
  33 use wcf\system\style\StyleHandler;
  34 use wcf\system\template\EmailTemplateEngine;
  35 use wcf\system\template\TemplateEngine;
  36 use wcf\system\user\storage\UserStorageHandler;
  37 use wcf\util\FileUtil;
  38 use wcf\util\HeaderUtil;
  39 use wcf\util\StringUtil;
  40 use wcf\util\UserUtil;
  41
  42 // try to set a time-limit to infinite
  43 @set_time_limit(0);
  44
  45 // fix timezone warning issue
  46 if (!@ini_get('date.timezone')) {
  47         @date_default_timezone_set('Europe/London');
  48 }
  49
  50 // define current woltlab suite version
  51 define('WCF_VERSION', '3.1.2');
  52
  53 // define current API version
  54 define('WSC_API_VERSION', 2018);
  55
  56 // define current unix timestamp
  57 define('TIME_NOW', time());
  58
  59 // wcf imports
  60 if (!defined('NO_IMPORTS')) {
  61         require_once(WCF_DIR.'lib/core.functions.php');
  62         require_once(WCF_DIR.'lib/system/api/autoload.php');
  63 }
  64
  65 /**
  66  * WCF is the central class for the WoltLab Suite Core.
  67  * It holds the database connection, access to template and language engine.
  68  *
  69  * @author      Marcel Werk
  70  * @copyright   2001-2018 WoltLab GmbH
  71  * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
  72  * @package     WoltLabSuite\Core\System
  73  */
  74 class WCF {
  75         /**
  76          * list of supported legacy API versions
  77          * @var integer[]
  78          */
  79         private static $supportedLegacyApiVersions = [2017];
  80
  81         /**
  82          * list of currently loaded applications
  83          * @var Application[]
  84          */
  85         protected static $applications = [];
  86
  87         /**
  88          * list of currently loaded application objects
  89          * @var IApplication[]
  90          */
  91         protected static $applicationObjects = [];
  92
  93         /**
  94          * list of autoload directories
  95          * @var array
  96          */
  97         protected static $autoloadDirectories = [];
  98
  99         /**
 100          * list of unique instances of each core object
 101          * @var SingletonFactory[]
 102          */
 103         protected static $coreObject = [];
 104
 105         /**
 106          * list of cached core objects
 107          * @var string[]
 108          */
 109         protected static $coreObjectCache = [];
 110
 111         /**
 112          * database object
 113          * @var MySQLDatabase
 114          */
 115         protected static $dbObj = null;
 116
 117         /**
 118          * language object
 119          * @var \wcf\data\language\Language
 120          */
 121         protected static $languageObj = null;
 122
 123         /**
 124          * overrides disabled debug mode
 125          * @var boolean
 126          */
 127         protected static $overrideDebugMode = false;
 128
 129         /**
 130          * session object
 131          * @var SessionHandler
 132          */
 133         protected static $sessionObj = null;
 134
 135         /**
 136          * template object
 137          * @var TemplateEngine
 138          */
 139         protected static $tplObj = null;
 140
 141         /**
 142          * true if Zend Opcache is loaded and enabled
 143          * @var boolean
 144          */
 145         protected static $zendOpcacheEnabled = null;
 146
 147         /**
 148          * force logout during destructor call
 149          * @var boolean
 150          */
 151         protected static $forceLogout = false;
 152
 153         /**
 154          * Calls all init functions of the WCF class.
 155          */
 156         public function __construct() {
 157                 // add autoload directory
 158                 self::$autoloadDirectories['wcf'] = WCF_DIR . 'lib/';
 159
 160                 // define tmp directory
 161                 if (!defined('TMP_DIR')) define('TMP_DIR', FileUtil::getTempFolder());
 162
 163                 // start initialization
 164                 $this->initDB();
 165                 $this->loadOptions();
 166                 $this->initSession();
 167                 $this->initLanguage();
 168                 $this->initTPL();
 169                 $this->initCronjobs();
 170                 $this->initCoreObjects();
 171                 $this->initApplications();
 172                 $this->initBlacklist();
 173
 174                 EventHandler::getInstance()->fireAction($this, 'initialized');
 175         }
 176
 177         /**
 178          * Flushes the output, closes the session, performs background tasks and more.
 179          *
 180          * You *must* not create output in here under normal circumstances, as it might get eaten
 181          * when gzip is enabled.
 182          */
 183         public static function destruct() {
 184                 try {
 185                         // database has to be initialized
 186                         if (!is_object(self::$dbObj)) return;
 187
 188                         $debug = self::debugModeIsEnabled(true);
 189                         if (!$debug) {
 190                                 // flush output
 191                                 if (ob_get_level()) ob_end_flush();
 192                                 flush();
 193
 194                                 // close connection if using FPM
 195                                 if (function_exists('fastcgi_finish_request')) fastcgi_finish_request();
 196                         }
 197
 198                         // update session
 199                         if (is_object(self::getSession())) {
 200                                 if (self::$forceLogout) {
 201                                         // do logout
 202                                         self::getSession()->delete();
 203                                 }
 204                                 else {
 205                                         self::getSession()->update();
 206                                 }
 207                         }
 208
 209                         // execute shutdown actions of storage handlers
 210                         RegistryHandler::getInstance()->shutdown();
 211                         UserStorageHandler::getInstance()->shutdown();
 212                 }
 213                 catch (\Exception $exception) {
 214                         die("<pre>WCF::destruct() Unhandled exception: ".$exception->getMessage()."\n\n".$exception->getTraceAsString());
 215                 }
 216         }
 217
 218         /**
 219          * Returns the database object.
 220          *
 221          * @return      \wcf\system\database\Database
 222          */
 223         public static final function getDB() {
 224                 return self::$dbObj;
 225         }
 226
 227         /**
 228          * Returns the session object.
 229          *
 230          * @return      SessionHandler
 231          */
 232         public static final function getSession() {
 233                 return self::$sessionObj;
 234         }
 235
 236         /**
 237          * Returns the user object.
 238          *
 239          * @return      \wcf\data\user\User
 240          */
 241         public static final function getUser() {
 242                 return self::getSession()->getUser();
 243         }
 244
 245         /**
 246          * Returns the language object.
 247          *
 248          * @return      \wcf\data\language\Language
 249          */
 250         public static final function getLanguage() {
 251                 return self::$languageObj;
 252         }
 253
 254         /**
 255          * Returns the template object.
 256          *
 257          * @return      TemplateEngine
 258          */
 259         public static final function getTPL() {
 260                 return self::$tplObj;
 261         }
 262
 263         /**
 264          * Calls the show method on the given exception.
 265          *
 266          * @param       \Exception      $e
 267          */
 268         public static final function handleException($e) {
 269                 // backwards compatibility
 270                 if ($e instanceof IPrintableException) {
 271                         $e->show();
 272                         exit;
 273                 }
 274
 275                 if (ob_get_level()) {
 276                         // discard any output generated before the exception occurred, prevents exception
 277                         // being hidden inside HTML elements and therefore not visible in browser output
 278                         //
 279                         // ob_get_level() can return values > 1, if the PHP setting `output_buffering` is on
 280                         while (ob_get_level()) ob_end_clean();
 281
 282                         // Some webservers are broken and will apply gzip encoding at all cost, but they fail
 283                         // to set a proper `Content-Encoding` HTTP header and mess things up even more.
 284                         // Especially the `identity` value appears to be unrecognized by some of them, hence
 285                         // we'll just gzip the output of the exception to prevent them from tampering.
 286                         // This part is copied from `HeaderUtil` in order to isolate the exception handler!
 287                         if (HTTP_ENABLE_GZIP && !defined('HTTP_DISABLE_GZIP')) {
 288                                 if (function_exists('gzcompress') && !@ini_get('zlib.output_compression') && !@ini_get('output_handler') && isset($_SERVER['HTTP_ACCEPT_ENCODING']) && strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip')) {
 289                                         if (strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'x-gzip')) {
 290                                                 @header('Content-Encoding: x-gzip');
 291                                         }
 292                                         else {
 293                                                 @header('Content-Encoding: gzip');
 294                                         }
 295
 296                                         ob_start(function($output) {
 297                                                 $size = strlen($output);
 298                                                 $crc = crc32($output);
 299
 300                                                 $newOutput = "\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff";
 301                                                 $newOutput .= substr(gzcompress($output, 1), 2, -4);
 302                                                 $newOutput .= pack('V', $crc);
 303                                                 $newOutput .= pack('V', $size);
 304
 305                                                 return $newOutput;
 306                                         });
 307                                 }
 308                         }
 309                 }
 310
 311                 @header('HTTP/1.1 503 Service Unavailable');
 312                 try {
 313                         \wcf\functions\exception\printThrowable($e);
 314                 }
 315                 catch (\Throwable $e2) {
 316                         echo "<pre>An Exception was thrown while handling an Exception:\n\n";
 317                         echo preg_replace('/Database->__construct\(.*\)/', 'Database->__construct(...)', $e2);
 318                         echo "\n\nwas thrown while:\n\n";
 319                         echo preg_replace('/Database->__construct\(.*\)/', 'Database->__construct(...)', $e);
 320                         echo "\n\nwas handled.</pre>";
 321                         exit;
 322                 }
 323                 catch (\Exception $e2) {
 324                         echo "<pre>An Exception was thrown while handling an Exception:\n\n";
 325                         echo preg_replace('/Database->__construct\(.*\)/', 'Database->__construct(...)', $e2);
 326                         echo "\n\nwas thrown while:\n\n";
 327                         echo preg_replace('/Database->__construct\(.*\)/', 'Database->__construct(...)', $e);
 328                         echo "\n\nwas handled.</pre>";
 329                         exit;
 330                 }
 331         }
 332
 333         /**
 334          * Turns PHP errors into an ErrorException.
 335          *
 336          * @param       integer         $severity
 337          * @param       string          $message
 338          * @param       string          $file
 339          * @param       integer         $line
 340          * @throws      ErrorException
 341          */
 342         public static final function handleError($severity, $message, $file, $line) {
 343                 // this is necessary for the shut-up operator
 344                 if (error_reporting() == 0) return;
 345
 346                 throw new ErrorException($message, 0, $severity, $file, $line);
 347         }
 348
 349         /**
 350          * Loads the database configuration and creates a new connection to the database.
 351          */
 352         protected function initDB() {
 353                 // get configuration
 354                 $dbHost = $dbUser = $dbPassword = $dbName = '';
 355                 $dbPort = 0;
 356                 require(WCF_DIR.'config.inc.php');
 357
 358                 // create database connection
 359                 self::$dbObj = new MySQLDatabase($dbHost, $dbUser, $dbPassword, $dbName, $dbPort);
 360         }
 361
 362         /**
 363          * Loads the options file, automatically created if not exists.
 364          */
 365         protected function loadOptions() {
 366                 $filename = WCF_DIR.'options.inc.php';
 367
 368                 // create options file if doesn't exist
 369                 if (!file_exists($filename) || filemtime($filename) <= 1) {
 370                         OptionEditor::rebuild();
 371                 }
 372                 require_once($filename);
 373
 374                 // check if option file is complete and writable
 375                 if (PACKAGE_ID) {
 376                         if (!is_writable($filename)) {
 377                                 FileUtil::makeWritable($filename);
 378
 379                                 if (!is_writable($filename)) {
 380                                         throw new SystemException("The option file '" . $filename . "' is not writable.");
 381                                 }
 382                         }
 383
 384                         // check if a previous write operation was incomplete and force rebuilding
 385                         if (!defined('WCF_OPTION_INC_PHP_SUCCESS')) {
 386                                 OptionEditor::rebuild();
 387
 388                                 require_once($filename);
 389                         }
 390                 }
 391         }
 392
 393         /**
 394          * Starts the session system.
 395          */
 396         protected function initSession() {
 397                 $factory = new SessionFactory();
 398                 $factory->load();
 399
 400                 self::$sessionObj = SessionHandler::getInstance();
 401                 self::$sessionObj->setHasValidCookie($factory->hasValidCookie());
 402         }
 403
 404         /**
 405          * Initialises the language engine.
 406          */
 407         protected function initLanguage() {
 408                 if (isset($_GET['l']) && !self::getUser()->userID) {
 409                         self::getSession()->setLanguageID(intval($_GET['l']));
 410                 }
 411
 412                 // set mb settings
 413                 mb_internal_encoding('UTF-8');
 414                 if (function_exists('mb_regex_encoding')) mb_regex_encoding('UTF-8');
 415                 mb_language('uni');
 416
 417                 // get language
 418                 self::$languageObj = LanguageFactory::getInstance()->getUserLanguage(self::getSession()->getLanguageID());
 419         }
 420
 421         /**
 422          * Initialises the template engine.
 423          */
 424         protected function initTPL() {
 425                 self::$tplObj = TemplateEngine::getInstance();
 426                 self::getTPL()->setLanguageID(self::getLanguage()->languageID);
 427                 $this->assignDefaultTemplateVariables();
 428
 429                 $this->initStyle();
 430         }
 431
 432         /**
 433          * Initializes the user's style.
 434          */
 435         protected function initStyle() {
 436                 if (isset($_REQUEST['styleID'])) {
 437                         self::getSession()->setStyleID(intval($_REQUEST['styleID']));
 438                 }
 439
 440                 $styleHandler = StyleHandler::getInstance();
 441                 $styleHandler->changeStyle(self::getSession()->getStyleID());
 442         }
 443
 444         /**
 445          * Executes the blacklist.
 446          */
 447         protected function initBlacklist() {
 448                 $isAjax = isset($_SERVER['HTTP_X_REQUESTED_WITH']) && ($_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest');
 449
 450                 if (defined('BLACKLIST_IP_ADDRESSES') && BLACKLIST_IP_ADDRESSES != '') {
 451                         if (!StringUtil::executeWordFilter(UserUtil::convertIPv6To4(self::getSession()->ipAddress), BLACKLIST_IP_ADDRESSES)) {
 452                                 if ($isAjax) {
 453                                         throw new AJAXException(self::getLanguage()->getDynamicVariable('wcf.ajax.error.permissionDenied'), AJAXException::INSUFFICIENT_PERMISSIONS);
 454                                 }
 455                                 else {
 456                                         throw new PermissionDeniedException();
 457                                 }
 458                         }
 459                         else if (!StringUtil::executeWordFilter(self::getSession()->ipAddress, BLACKLIST_IP_ADDRESSES)) {
 460                                 if ($isAjax) {
 461                                         throw new AJAXException(self::getLanguage()->getDynamicVariable('wcf.ajax.error.permissionDenied'), AJAXException::INSUFFICIENT_PERMISSIONS);
 462                                 }
 463                                 else {
 464                                         throw new PermissionDeniedException();
 465                                 }
 466                         }
 467                 }
 468                 if (defined('BLACKLIST_USER_AGENTS') && BLACKLIST_USER_AGENTS != '') {
 469                         if (!StringUtil::executeWordFilter(self::getSession()->userAgent, BLACKLIST_USER_AGENTS)) {
 470                                 if ($isAjax) {
 471                                         throw new AJAXException(self::getLanguage()->getDynamicVariable('wcf.ajax.error.permissionDenied'), AJAXException::INSUFFICIENT_PERMISSIONS);
 472                                 }
 473                                 else {
 474                                         throw new PermissionDeniedException();
 475                                 }
 476                         }
 477                 }
 478                 if (defined('BLACKLIST_HOSTNAMES') && BLACKLIST_HOSTNAMES != '') {
 479                         if (!StringUtil::executeWordFilter(@gethostbyaddr(self::getSession()->ipAddress), BLACKLIST_HOSTNAMES)) {
 480                                 if ($isAjax) {
 481                                         throw new AJAXException(self::getLanguage()->getDynamicVariable('wcf.ajax.error.permissionDenied'), AJAXException::INSUFFICIENT_PERMISSIONS);
 482                                 }
 483                                 else {
 484                                         throw new PermissionDeniedException();
 485                                 }
 486                         }
 487                 }
 488
 489                 // handle banned users
 490                 if (self::getUser()->userID && self::getUser()->banned) {
 491                         if ($isAjax) {
 492                                 throw new AJAXException(self::getLanguage()->getDynamicVariable('wcf.user.error.isBanned'), AJAXException::INSUFFICIENT_PERMISSIONS);
 493                         }
 494                         else {
 495                                 self::$forceLogout = true;
 496
 497                                 // remove cookies
 498                                 if (isset($_COOKIE[COOKIE_PREFIX.'userID'])) {
 499                                         HeaderUtil::setCookie('userID', 0);
 500                                 }
 501                                 if (isset($_COOKIE[COOKIE_PREFIX.'password'])) {
 502                                         HeaderUtil::setCookie('password', '');
 503                                 }
 504
 505                                 throw new NamedUserException(self::getLanguage()->getDynamicVariable('wcf.user.error.isBanned'));
 506                         }
 507                 }
 508         }
 509
 510         /**
 511          * Initializes applications.
 512          */
 513         protected function initApplications() {
 514                 // step 1) load all applications
 515                 $loadedApplications = [];
 516
 517                 // register WCF as application
 518                 self::$applications['wcf'] = ApplicationHandler::getInstance()->getApplicationByID(1);
 519
 520                 if (!class_exists(WCFACP::class, false)) {
 521                         static::getTPL()->assign('baseHref', self::$applications['wcf']->getPageURL());
 522                 }
 523
 524                 // start main application
 525                 $application = ApplicationHandler::getInstance()->getActiveApplication();
 526                 if ($application->packageID != 1) {
 527                         $loadedApplications[] = $this->loadApplication($application);
 528
 529                         // register primary application
 530                         $abbreviation = ApplicationHandler::getInstance()->getAbbreviation($application->packageID);
 531                         self::$applications[$abbreviation] = $application;
 532                 }
 533
 534                 // start dependent applications
 535                 $applications = ApplicationHandler::getInstance()->getDependentApplications();
 536                 foreach ($applications as $application) {
 537                         if ($application->packageID == 1) {
 538                                 // ignore WCF
 539                                 continue;
 540                         }
 541                         else if ($application->isTainted) {
 542                                 // ignore apps flagged for uninstallation
 543                                 continue;
 544                         }
 545
 546                         $loadedApplications[] = $this->loadApplication($application, true);
 547                 }
 548
 549                 // step 2) run each application
 550                 if (!class_exists('wcf\system\WCFACP', false)) {
 551                         /** @var IApplication $application */
 552                         foreach ($loadedApplications as $application) {
 553                                 $application->__run();
 554                         }
 555
 556                         // refresh the session 1 minute before it expires
 557                         self::getTPL()->assign('__sessionKeepAlive', SESSION_TIMEOUT - 60);
 558                 }
 559         }
 560
 561         /**
 562          * Loads an application.
 563          *
 564          * @param       Application             $application
 565          * @param       boolean                 $isDependentApplication
 566          * @return      IApplication
 567          * @throws      SystemException
 568          */
 569         protected function loadApplication(Application $application, $isDependentApplication = false) {
 570                 $package = PackageCache::getInstance()->getPackage($application->packageID);
 571                 // package cache might be outdated
 572                 if ($package === null) {
 573                         $package = new Package($application->packageID);
 574
 575                         // package cache is outdated, discard cache
 576                         if ($package->packageID) {
 577                                 PackageEditor::resetCache();
 578                         }
 579                         else {
 580                                 // package id is invalid
 581                                 throw new SystemException("application identified by package id '".$application->packageID."' is unknown");
 582                         }
 583                 }
 584
 585                 $abbreviation = ApplicationHandler::getInstance()->getAbbreviation($application->packageID);
 586                 $packageDir = FileUtil::getRealPath(WCF_DIR.$package->packageDir);
 587                 self::$autoloadDirectories[$abbreviation] = $packageDir . 'lib/';
 588
 589                 $className = $abbreviation.'\system\\'.strtoupper($abbreviation).'Core';
 590
 591                 // class was not found, possibly the app was moved, but `packageDir` has not been adjusted
 592                 if (!class_exists($className)) {
 593                         // check if both the Core and the app are on the same domain
 594                         $coreApp = ApplicationHandler::getInstance()->getApplicationByID(1);
 595                         if ($coreApp->domainName === $application->domainName) {
 596                                 // resolve the relative path and use it to construct the autoload directory
 597                                 $relativePath = FileUtil::getRelativePath($coreApp->domainPath, $application->domainPath);
 598                                 if ($relativePath !== './') {
 599                                         $packageDir = FileUtil::getRealPath(WCF_DIR.$relativePath);
 600                                         self::$autoloadDirectories[$abbreviation] = $packageDir . 'lib/';
 601
 602                                         if (class_exists($className)) {
 603                                                 // the class can now be found, update the `packageDir` value
 604                                                 (new PackageEditor($package))->update(['packageDir' => $relativePath]);
 605                                         }
 606                                 }
 607                         }
 608                 }
 609
 610                 if (class_exists($className) && is_subclass_of($className, IApplication::class)) {
 611                         // include config file
 612                         $configPath = $packageDir . PackageInstallationDispatcher::CONFIG_FILE;
 613                         if (!file_exists($configPath)) {
 614                                 Package::writeConfigFile($package->packageID);
 615                         }
 616
 617                         if (file_exists($configPath)) {
 618                                 require_once($configPath);
 619                         }
 620                         else {
 621                                 throw new SystemException('Unable to load configuration for '.$package->package);
 622                         }
 623
 624                         // register template path if not within ACP
 625                         if (!class_exists('wcf\system\WCFACP', false)) {
 626                                 // add template path and abbreviation
 627                                 static::getTPL()->addApplication($abbreviation, $packageDir . 'templates/');
 628                         }
 629                         EmailTemplateEngine::getInstance()->addApplication($abbreviation, $packageDir . 'templates/');
 630
 631                         // init application and assign it as template variable
 632                         self::$applicationObjects[$application->packageID] = call_user_func([$className, 'getInstance']);
 633                         static::getTPL()->assign('__'.$abbreviation, self::$applicationObjects[$application->packageID]);
 634                         EmailTemplateEngine::getInstance()->assign('__'.$abbreviation, self::$applicationObjects[$application->packageID]);
 635                 }
 636                 else {
 637                         unset(self::$autoloadDirectories[$abbreviation]);
 638                         throw new SystemException("Unable to run '".$package->package."', '".$className."' is missing or does not implement '".IApplication::class."'.");
 639                 }
 640
 641                 // register template path in ACP
 642                 if (class_exists('wcf\system\WCFACP', false)) {
 643                         static::getTPL()->addApplication($abbreviation, $packageDir . 'acp/templates/');
 644                 }
 645                 else if (!$isDependentApplication) {
 646                         // assign base tag
 647                         static::getTPL()->assign('baseHref', $application->getPageURL());
 648                 }
 649
 650                 // register application
 651                 self::$applications[$abbreviation] = $application;
 652
 653                 return self::$applicationObjects[$application->packageID];
 654         }
 655
 656         /**
 657          * Returns the corresponding application object. Does not support the 'wcf' pseudo application.
 658          *
 659          * @param       Application     $application
 660          * @return      IApplication
 661          */
 662         public static function getApplicationObject(Application $application) {
 663                 if (isset(self::$applicationObjects[$application->packageID])) {
 664                         return self::$applicationObjects[$application->packageID];
 665                 }
 666
 667                 return null;
 668         }
 669
 670         /**
 671          * Returns the invoked application.
 672          *
 673          * @return      Application
 674          */
 675         public static function getActiveApplication() {
 676                 return ApplicationHandler::getInstance()->getActiveApplication();
 677         }
 678
 679         /**
 680          * Loads an application on runtime, do not use this outside the package installation.
 681          *
 682          * @param       integer         $packageID
 683          */
 684         public static function loadRuntimeApplication($packageID) {
 685                 $package = new Package($packageID);
 686                 $application = new Application($packageID);
 687
 688                 $abbreviation = Package::getAbbreviation($package->package);
 689                 $packageDir = FileUtil::getRealPath(WCF_DIR.$package->packageDir);
 690                 self::$autoloadDirectories[$abbreviation] = $packageDir . 'lib/';
 691                 self::$applications[$abbreviation] = $application;
 692                 self::getTPL()->addApplication($abbreviation, $packageDir . 'acp/templates/');
 693         }
 694
 695         /**
 696          * Initializes core object cache.
 697          */
 698         protected function initCoreObjects() {
 699                 // ignore core objects if installing WCF
 700                 if (PACKAGE_ID == 0) {
 701                         return;
 702                 }
 703
 704                 self::$coreObjectCache = CoreObjectCacheBuilder::getInstance()->getData();
 705         }
 706
 707         /**
 708          * Assigns some default variables to the template engine.
 709          */
 710         protected function assignDefaultTemplateVariables() {
 711                 self::getTPL()->registerPrefilter(['event', 'hascontent', 'lang']);
 712                 self::getTPL()->assign([
 713                         '__wcf' => $this,
 714                         '__wcfVersion' => LAST_UPDATE_TIME // @deprecated 2.1, use LAST_UPDATE_TIME directly
 715                 ]);
 716
 717                 $isAjax = isset($_SERVER['HTTP_X_REQUESTED_WITH']) && ($_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest');
 718                 // Execute background queue in this request, if it was requested and AJAX isn't used.
 719                 if (!$isAjax) {
 720                         if (self::getSession()->getVar('forceBackgroundQueuePerform')) {
 721                                 self::getTPL()->assign([
 722                                         'forceBackgroundQueuePerform' => true
 723                                 ]);
 724
 725                                 self::getSession()->unregister('forceBackgroundQueuePerform');
 726                         }
 727                 }
 728
 729                 EmailTemplateEngine::getInstance()->registerPrefilter(['event', 'hascontent', 'lang']);
 730                 EmailTemplateEngine::getInstance()->assign([
 731                         '__wcf' => $this
 732                 ]);
 733         }
 734
 735         /**
 736          * Wrapper for the getter methods of this class.
 737          *
 738          * @param       string          $name
 739          * @return      mixed           value
 740          * @throws      SystemException
 741          */
 742         public function __get($name) {
 743                 $method = 'get'.ucfirst($name);
 744                 if (method_exists($this, $method)) {
 745                         return $this->$method();
 746                 }
 747
 748                 throw new SystemException("method '".$method."' does not exist in class WCF");
 749         }
 750
 751         /**
 752          * Returns true if current application (WCF) is treated as active and was invoked directly.
 753          *
 754          * @return      boolean
 755          */
 756         public function isActiveApplication() {
 757                 return (ApplicationHandler::getInstance()->getActiveApplication()->packageID == 1);
 758         }
 759
 760         /**
 761          * Changes the active language.
 762          *
 763          * @param       integer         $languageID
 764          */
 765         public static final function setLanguage($languageID) {
 766                 if (!$languageID || LanguageFactory::getInstance()->getLanguage($languageID) === null) {
 767                         $languageID = LanguageFactory::getInstance()->getDefaultLanguageID();
 768                 }
 769
 770                 self::$languageObj = LanguageFactory::getInstance()->getLanguage($languageID);
 771
 772                 // the template engine may not be available yet, usually happens when
 773                 // changing the user (and thus the language id) during session init
 774                 if (self::$tplObj !== null) {
 775                         self::getTPL()->setLanguageID(self::getLanguage()->languageID);
 776                         EmailTemplateEngine::getInstance()->setLanguageID(self::getLanguage()->languageID);
 777                 }
 778         }
 779
 780         /**
 781          * Includes the required util or exception classes automatically.
 782          *
 783          * @param       string          $className
 784          * @see         spl_autoload_register()
 785          */
 786         public static final function autoload($className) {
 787                 $namespaces = explode('\\', $className);
 788                 if (count($namespaces) > 1) {
 789                         $applicationPrefix = array_shift($namespaces);
 790                         if ($applicationPrefix === '') {
 791                                 $applicationPrefix = array_shift($namespaces);
 792                         }
 793                         if (isset(self::$autoloadDirectories[$applicationPrefix])) {
 794                                 $classPath = self::$autoloadDirectories[$applicationPrefix] . implode('/', $namespaces) . '.class.php';
 795                                 if (file_exists($classPath)) {
 796                                         require_once($classPath);
 797                                 }
 798                         }
 799                 }
 800         }
 801
 802         /**
 803          * @inheritDoc
 804          */
 805         public final function __call($name, array $arguments) {
 806                 // bug fix to avoid php crash, see http://bugs.php.net/bug.php?id=55020
 807                 if (!method_exists($this, $name)) {
 808                         return self::__callStatic($name, $arguments);
 809                 }
 810
 811                 return $this->$name($arguments);
 812         }
 813
 814         /**
 815          * Returns dynamically loaded core objects.
 816          *
 817          * @param       string          $name
 818          * @param       array           $arguments
 819          * @return      object
 820          * @throws      SystemException
 821          */
 822         public static final function __callStatic($name, array $arguments) {
 823                 $className = preg_replace('~^get~', '', $name);
 824
 825                 if (isset(self::$coreObject[$className])) {
 826                         return self::$coreObject[$className];
 827                 }
 828
 829                 $objectName = self::getCoreObject($className);
 830                 if ($objectName === null) {
 831                         throw new SystemException("Core object '".$className."' is unknown.");
 832                 }
 833
 834                 if (class_exists($objectName)) {
 835                         if (!is_subclass_of($objectName, SingletonFactory::class)) {
 836                                 throw new ParentClassException($objectName, SingletonFactory::class);
 837                         }
 838
 839                         self::$coreObject[$className] = call_user_func([$objectName, 'getInstance']);
 840                         return self::$coreObject[$className];
 841                 }
 842         }
 843
 844         /**
 845          * Searches for cached core object definition.
 846          *
 847          * @param       string          $className
 848          * @return      string
 849          */
 850         protected static final function getCoreObject($className) {
 851                 if (isset(self::$coreObjectCache[$className])) {
 852                         return self::$coreObjectCache[$className];
 853                 }
 854
 855                 return null;
 856         }
 857
 858         /**
 859          * Returns true if the debug mode is enabled, otherwise false.
 860          *
 861          * @param       boolean         $ignoreACP
 862          * @return      boolean
 863          */
 864         public static function debugModeIsEnabled($ignoreACP = false) {
 865                 // ACP override
 866                 if (!$ignoreACP && self::$overrideDebugMode) {
 867                         return true;
 868                 }
 869                 else if (defined('ENABLE_DEBUG_MODE') && ENABLE_DEBUG_MODE) {
 870                         return true;
 871                 }
 872
 873                 return false;
 874         }
 875
 876         /**
 877          * Returns true if benchmarking is enabled, otherwise false.
 878          *
 879          * @return      boolean
 880          */
 881         public static function benchmarkIsEnabled() {
 882                 // benchmarking is enabled by default
 883                 if (!defined('ENABLE_BENCHMARK') || ENABLE_BENCHMARK) return true;
 884                 return false;
 885         }
 886
 887         /**
 888          * Returns domain path for given application.
 889          *
 890          * @param       string          $abbreviation
 891          * @return      string
 892          */
 893         public static function getPath($abbreviation = 'wcf') {
 894                 // workaround during WCFSetup
 895                 if (!PACKAGE_ID) {
 896                         return '../';
 897                 }
 898
 899                 if (!isset(self::$applications[$abbreviation])) {
 900                         $abbreviation = 'wcf';
 901                 }
 902
 903                 return self::$applications[$abbreviation]->getPageURL();
 904         }
 905
 906         /**
 907          * Returns the domain path for the currently active application,
 908          * used to avoid CORS requests.
 909          *
 910          * @return      string
 911          */
 912         public static function getActivePath() {
 913                 if (!PACKAGE_ID) {
 914                         return self::getPath();
 915                 }
 916
 917                 return self::getPath(ApplicationHandler::getInstance()->getAbbreviation(ApplicationHandler::getInstance()->getActiveApplication()->packageID));
 918         }
 919
 920         /**
 921          * Returns a fully qualified anchor for current page.
 922          *
 923          * @param       string          $fragment
 924          * @return      string
 925          */
 926         public function getAnchor($fragment) {
 927                 return StringUtil::encodeHTML(self::getRequestURI() . '#' . $fragment);
 928         }
 929
 930         /**
 931          * Returns the currently active page or null if unknown.
 932          *
 933          * @return      Page|null
 934          */
 935         public static function getActivePage() {
 936                 if (self::getActiveRequest() === null) {
 937                         return null;
 938                 }
 939
 940                 if (self::getActiveRequest()->getClassName() === CmsPage::class) {
 941                         $metaData = self::getActiveRequest()->getMetaData();
 942                         if (isset($metaData['cms'])) {
 943                                 return PageCache::getInstance()->getPage($metaData['cms']['pageID']);
 944                         }
 945
 946                         return null;
 947                 }
 948
 949                 return PageCache::getInstance()->getPageByController(self::getActiveRequest()->getClassName());
 950         }
 951
 952         /**
 953          * Returns the currently active request.
 954          *
 955          * @return Request
 956          */
 957         public static function getActiveRequest() {
 958                 return RequestHandler::getInstance()->getActiveRequest();
 959         }
 960
 961         /**
 962          * Returns the URI of the current page.
 963          *
 964          * @return      string
 965          */
 966         public static function getRequestURI() {
 967                 return preg_replace('~^(https?://[^/]+)(?:/.*)?$~', '$1', self::getTPL()->get('baseHref')) . $_SERVER['REQUEST_URI'];
 968         }
 969
 970         /**
 971          * Resets Zend Opcache cache if installed and enabled.
 972          *
 973          * @param       string          $script
 974          */
 975         public static function resetZendOpcache($script = '') {
 976                 if (self::$zendOpcacheEnabled === null) {
 977                         self::$zendOpcacheEnabled = false;
 978
 979                         if (extension_loaded('Zend Opcache') && @ini_get('opcache.enable')) {
 980                                 self::$zendOpcacheEnabled = true;
 981                         }
 982
 983                 }
 984
 985                 if (self::$zendOpcacheEnabled) {
 986                         if (empty($script)) {
 987                                 opcache_reset();
 988                         }
 989                         else {
 990                                 opcache_invalidate($script, true);
 991                         }
 992                 }
 993         }
 994
 995         /**
 996          * Returns style handler.
 997          *
 998          * @return      StyleHandler
 999          */
1000         public function getStyleHandler() {
1001                 return StyleHandler::getInstance();
1002         }
1003
1004         /**
1005          * Returns box handler.
1006          *
1007          * @return      BoxHandler
1008          * @since       3.0
1009          */
1010         public function getBoxHandler() {
1011                 return BoxHandler::getInstance();
1012         }
1013
1014         /**
1015          * Returns number of available updates.
1016          *
1017          * @return      integer
1018          */
1019         public function getAvailableUpdates() {
1020                 $data = PackageUpdateCacheBuilder::getInstance()->getData();
1021                 return $data['updates'];
1022         }
1023
1024         /**
1025          * Returns a 8 character prefix for editor autosave.
1026          *
1027          * @return      string
1028          */
1029         public function getAutosavePrefix() {
1030                 return substr(sha1(preg_replace('~^https~', 'http', self::getPath())), 0, 8);
1031         }
1032
1033         /**
1034          * Returns the favicon URL or a base64 encoded image.
1035          *
1036          * @return      string
1037          */
1038         public function getFavicon() {
1039                 $activeApplication = ApplicationHandler::getInstance()->getActiveApplication();
1040                 $wcf = ApplicationHandler::getInstance()->getWCF();
1041                 $favicon = StyleHandler::getInstance()->getStyle()->getRelativeFavicon();
1042
1043                 if ($activeApplication->domainName !== $wcf->domainName) {
1044                         if (file_exists(WCF_DIR.$favicon)) {
1045                                 $favicon = file_get_contents(WCF_DIR.$favicon);
1046
1047                                 return 'data:image/x-icon;base64,' . base64_encode($favicon);
1048                         }
1049                 }
1050
1051                 return self::getPath() . $favicon;
1052         }
1053
1054         /**
1055          * Returns true if the desktop notifications should be enabled.
1056          *
1057          * @return      boolean
1058          */
1059         public function useDesktopNotifications() {
1060                 if (!ENABLE_DESKTOP_NOTIFICATIONS) {
1061                         return false;
1062                 }
1063                 else if (ApplicationHandler::getInstance()->isMultiDomainSetup()) {
1064                         $application = ApplicationHandler::getInstance()->getApplicationByID(DESKTOP_NOTIFICATION_PACKAGE_ID);
1065                         // mismatch, default to Core
1066                         if ($application === null) $application = ApplicationHandler::getInstance()->getApplicationByID(1);
1067
1068                         $currentApplication = ApplicationHandler::getInstance()->getActiveApplication();
1069                         if ($currentApplication->domainName != $application->domainName) {
1070                                 // different domain
1071                                 return false;
1072                         }
1073                 }
1074
1075                 return true;
1076         }
1077
1078         /**
1079          * Returns true if currently active request represents the landing page.
1080          *
1081          * @return      boolean
1082          */
1083         public static function isLandingPage() {
1084                 if (self::getActiveRequest() === null) {
1085                         return false;
1086                 }
1087
1088                 return self::getActiveRequest()->isLandingPage();
1089         }
1090
1091         /**
1092          * Returns true if the given API version is currently supported.
1093          *
1094          * @param       integer         $apiVersion
1095          * @return      boolean
1096          */
1097         public static function isSupportedApiVersion($apiVersion) {
1098                 return ($apiVersion == WSC_API_VERSION) || in_array($apiVersion, self::$supportedLegacyApiVersions);
1099         }
1100
1101         /**
1102          * Returns the list of supported legacy API versions.
1103          *
1104          * @return      integer[]
1105          */
1106         public static function getSupportedLegacyApiVersions() {
1107                 return self::$supportedLegacyApiVersions;
1108         }
1109
1110         /**
1111          * Initialises the cronjobs.
1112          */
1113         protected function initCronjobs() {
1114                 if (PACKAGE_ID) {
1115                         self::getTPL()->assign('executeCronjobs', CronjobScheduler::getInstance()->getNextExec() < TIME_NOW && defined('OFFLINE') && !OFFLINE);
1116                 }
1117         }
1118 }