framework/bootstrap/class_FrameworkBootstrap.php

   1 <?php
   2 // Own namespace
   3 namespace Org\Mxchange\CoreFramework\Bootstrap;
   4
   5 // Import framework stuff
   6 use Org\Mxchange\CoreFramework\Configuration\FrameworkConfiguration;
   7 use Org\Mxchange\CoreFramework\Connection\Database\DatabaseConnection;
   8 use Org\Mxchange\CoreFramework\Connector\Database\DatabaseConnector;
   9 use Org\Mxchange\CoreFramework\Console\Tools\ConsoleTools;
  10 use Org\Mxchange\CoreFramework\EntryPoint\ApplicationEntryPoint;
  11 use Org\Mxchange\CoreFramework\Factory\ObjectFactory;
  12 use Org\Mxchange\CoreFramework\Generic\NullPointerException;
  13 use Org\Mxchange\CoreFramework\Helper\Application\ApplicationHelper;
  14 use Org\Mxchange\CoreFramework\Localization\ManageableLanguage;
  15 use Org\Mxchange\CoreFramework\Loader\ClassLoader;
  16 use Org\Mxchange\CoreFramework\Manager\ManageableApplication;
  17 use Org\Mxchange\CoreFramework\Middleware\Debug\DebugMiddleware;
  18 use Org\Mxchange\CoreFramework\Object\BaseFrameworkSystem;
  19 use Org\Mxchange\CoreFramework\Registry\GenericRegistry;
  20 use Org\Mxchange\CoreFramework\Request\Requestable;
  21 use Org\Mxchange\CoreFramework\Response\Responseable;
  22 use Org\Mxchange\CoreFramework\Utils\String\StringUtils;
  23
  24 // Import SPL stuff
  25 use \BadMethodCallException;
  26 use \InvalidArgumentException;
  27 use \SplFileInfo;
  28
  29 /**
  30  * A framework-bootstrap class which helps the frameworks to bootstrap ... ;-)
  31  *
  32  * @author              Roland Haeder <webmaster@ship-simu.org>
  33  * @version             0.0.0
  34  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2020 Core Developer Team
  35  * @license             GNU GPL 3.0 or any newer version
  36  * @link                http://www.ship-simu.org
  37  *
  38  * This program is free software: you can redistribute it and/or modify
  39  * it under the terms of the GNU General Public License as published by
  40  * the Free Software Foundation, either version 3 of the License, or
  41  * (at your option) any later version.
  42  *
  43  * This program is distributed in the hope that it will be useful,
  44  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  45  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  46  * GNU General Public License for more details.
  47  *
  48  * You should have received a copy of the GNU General Public License
  49  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  50  */
  51 final class FrameworkBootstrap {
  52
  53         /**
  54          * Detected server address
  55          */
  56         private static $serverAddress = NULL;
  57
  58         /**
  59          * Instance of a Requestable class
  60          */
  61         private static $requestInstance = NULL;
  62
  63         /**
  64          * Instance of a Responseable class
  65          */
  66         private static $responseInstance = NULL;
  67
  68         /**
  69          * Instance of a FrameworkConfiguration class
  70          */
  71         private static $configurationInstance = NULL;
  72
  73         /**
  74          * Database instance
  75          */
  76         private static $databaseInstance = NULL;
  77
  78         /**
  79          * Language system instance
  80          */
  81         private static $languageInstance = NULL;
  82
  83         /*
  84          * Includes applications may have. They will be tried in the given order,
  85          * some will become soon deprecated.
  86          */
  87         private static $configAppIncludes = array(
  88                 // The ApplicationHelper class (required)
  89                 'class_ApplicationHelper' => 'required',
  90                 // Some debugging stuff (optional but can be committed)
  91                 'debug'                   => 'optional',
  92                 // Application's exception handler (optional but can be committed)
  93                 'exceptions'              => 'optional',
  94                 // Application's configuration file (committed, non-local specific)
  95                 'config'                  => 'required',
  96                 // Local configuration file (optional, not committed, listed in .gitignore)
  97                 'config-local'            => 'optional',
  98                 // Application data (deprecated)
  99                 'data'                    => 'deprecated',
 100                 // Application loader (deprecated)
 101                 'loader'                  => 'deprecated',
 102                 // Application initializer (deprecated)
 103                 'init'                    => 'deprecated',
 104                 // Application starter (deprecated)
 105                 'starter'                 => 'deprecated',
 106         );
 107
 108         /**
 109          * Private constructor, no instance is needed from this class as only
 110          * static methods exist.
 111          */
 112         private function __construct () {
 113                 // Prevent making instances from this "utilities" class
 114         }
 115
 116         /**
 117          * Some "getter" for a configuration instance, making sure, it is unique
 118          *
 119          * @return      $configurationInstance  An instance of a FrameworkConfiguration class
 120          */
 121         public static function getConfigurationInstance () {
 122                 // Is the instance there?
 123                 if (is_null(self::$configurationInstance)) {
 124                         // Init new instance
 125                         self::$configurationInstance = new FrameworkConfiguration();
 126                 } // END - if
 127
 128                 // Return it
 129                 return self::$configurationInstance;
 130         }
 131
 132         /**
 133          * "Getter" to get response/request type from analysis of the system.
 134          *
 135          * @return      $requestType    Analyzed request type
 136          */
 137         public static function getRequestTypeFromSystem () {
 138                 // Default is console
 139                 $requestType = 'console';
 140
 141                 // Is 'HTTP_HOST' set?
 142                 if (isset($_SERVER['HTTP_HOST'])) {
 143                         // Then it is a HTML response/request.
 144                         $requestType = 'html';
 145                 } // END - if
 146
 147                 // Return it
 148                 return $requestType;
 149         }
 150
 151         /**
 152          * Checks whether the given file/path is in open_basedir(). This does not
 153          * gurantee that the file is actually readable and/or writeable. If you need
 154          * such gurantee then please use isReadableFile() instead.
 155          *
 156          * @param       $fileInstance   An instance of a SplFileInfo class
 157          * @return      $isReachable    Whether it is within open_basedir()
 158          */
 159         public static function isReachableFilePath (SplFileInfo $fileInstance) {
 160                 // Is not reachable by default
 161                 $isReachable = false;
 162
 163                 // Get open_basedir parameter
 164                 $openBaseDir = trim(ini_get('open_basedir'));
 165
 166                 // Is it set?
 167                 if (!empty($openBaseDir)) {
 168                         // Check all entries
 169                         foreach (explode(PATH_SEPARATOR, $openBaseDir) as $dir) {
 170                                 // Check on existence
 171                                 if (substr($fileInstance->getPathname(), 0, strlen($dir)) == $dir) {
 172                                         // Is reachable
 173                                         $isReachable = true;
 174
 175                                         // Abort lookup as it has been found in open_basedir
 176                                         break;
 177                                 } // END - if
 178                         } // END - foreach
 179                 } else {
 180                         // If open_basedir is not set, all is allowed
 181                         $isReachable = true;
 182                 }
 183
 184                 // Return status
 185                 return $isReachable;
 186         }
 187
 188         /**
 189          * Checks whether the give file is within open_basedir() (done by
 190          * isReachableFilePath()), is actually a file and is readable.
 191          *
 192          * @param       $fileInstance   An instance of a SplFileInfo class
 193          * @return      $isReadable             Whether the file is readable (and therefor exists)
 194          */
 195         public static function isReadableFile (SplFileInfo $fileInstance) {
 196                 // Default is not readable
 197                 $isReadable = false;
 198
 199                 // Check if it is a file and readable
 200                 $isReadable = (
 201                         (
 202                                 self::isReachableFilePath($fileInstance)
 203                         ) && (
 204                                 $fileInstance->isFile()
 205                         ) && (
 206                                 $fileInstance->isReadable()
 207                         )
 208                 );
 209
 210                 // Return status
 211                 return $isReadable;
 212         }
 213
 214         /**
 215          * Loads given include file
 216          *
 217          * @param       $fileInstance   An instance of a SplFileInfo class
 218          * @return      void
 219          * @throws      InvalidArgumentException        If file was not found or not readable or deprecated
 220          */
 221         public static function loadInclude (SplFileInfo $fileInstance) {
 222                 // Trace message
 223                 //* NOISY-DEBUG: */ printf('[%s:%d]: fileInstance=%s - CALLED!' . PHP_EOL, __METHOD__, __LINE__, $fileInstance);
 224
 225                 // Should be there ...
 226                 if (!self::isReadableFile($fileInstance)) {
 227                         // Abort here
 228                         throw new InvalidArgumentException(sprintf('Cannot find fileInstance.pathname=%s.', $fileInstance->getPathname()));
 229                 } // END - if
 230
 231                 // Load it
 232                 require_once $fileInstance->getPathname();
 233
 234                 // Trace message
 235                 //* NOISY-DEBUG: */ printf('[%s:%d]: EXIT!' . PHP_EOL, __METHOD__, __LINE__);
 236         }
 237
 238         /**
 239          * Does the actual bootstrap
 240          *
 241          * @return      void
 242          */
 243         public static function doBootstrap () {
 244                 // Load basic include files to continue bootstrapping
 245                 self::loadInclude(new SplFileInfo(sprintf('%smain%sinterfaces%sclass_FrameworkInterface.php', ApplicationEntryPoint::detectFrameworkPath(), DIRECTORY_SEPARATOR, DIRECTORY_SEPARATOR)));
 246                 self::loadInclude(new SplFileInfo(sprintf('%smain%sclasses%sclass_BaseFrameworkSystem.php', ApplicationEntryPoint::detectFrameworkPath(), DIRECTORY_SEPARATOR, DIRECTORY_SEPARATOR)));
 247                 self::loadInclude(new SplFileInfo(sprintf('%smain%sclasses%sutils%sstring%sclass_StringUtils.php', ApplicationEntryPoint::detectFrameworkPath(), DIRECTORY_SEPARATOR, DIRECTORY_SEPARATOR, DIRECTORY_SEPARATOR, DIRECTORY_SEPARATOR)));
 248                 self::loadInclude(new SplFileInfo(sprintf('%smain%sinterfaces%sregistry%sclass_Registerable.php', ApplicationEntryPoint::detectFrameworkPath(), DIRECTORY_SEPARATOR, DIRECTORY_SEPARATOR, DIRECTORY_SEPARATOR)));
 249                 self::loadInclude(new SplFileInfo(sprintf('%sconfig%sclass_FrameworkConfiguration.php', ApplicationEntryPoint::detectFrameworkPath(), DIRECTORY_SEPARATOR)));
 250
 251                 // Load global configuration
 252                 self::loadInclude(new SplFileInfo(sprintf('%s%s', ApplicationEntryPoint::detectFrameworkPath(), 'config-global.php')));
 253         }
 254
 255         /**
 256          * Initializes the framework by scanning for all framework-relevant
 257          * classes, interfaces and exception. Then determine the request type and
 258          * initialize a Requestable instance which will then contain all request
 259          * parameter, also from CLI. Next step is to validate the application
 260          * (very basic).
 261          *
 262          * @return      void
 263          */
 264         public static function initFramework () {
 265                 /**
 266                  * 1) Load class loader and scan framework classes, interfaces and
 267                  *    exceptions.
 268                  */
 269                 self::scanFrameworkClasses();
 270
 271                 /*
 272                  * 2) Determine the request type, console or web and store request and
 273                  *    response here. This also initializes the request instance will
 274                  *    all given parameters (see doc-tag for possible sources of
 275                  *    parameters).
 276                  */
 277                 self::determineRequestType();
 278
 279                 /*
 280                  * 3) Now, that there are all request parameters being available, check
 281                  *    if 'application' is supplied. If it is not found, abort execution, if
 282                  *    found, continue below with next step.
 283                  */
 284                 self::validateApplicationParameter();
 285         }
 286
 287         /**
 288          * Initializes the detected application. This may fail if required files
 289          * are not found in the application's base path (not to be confused with
 290          * 'application_base_path' which only points to /some/foo/application/.
 291          *
 292          * @return      void
 293          */
 294         public static function prepareApplication () {
 295                 // Configuration entry 'detected_app_name' must be set, get it here, including full path
 296                 $application = self::getConfigurationInstance()->getConfigEntry('detected_app_name');
 297                 $fullPath    = self::getConfigurationInstance()->getConfigEntry('detected_full_app_path');
 298
 299                 /*
 300                  * Now check and load all files, found deprecated files will throw a
 301                  * warning at the user.
 302                  */
 303                 foreach (self::$configAppIncludes as $fileName => $status) {
 304                         // Construct file instance
 305                         $fileInstance = new SplFileInfo(sprintf('%s%s.php', $fullPath, $fileName));
 306
 307                         // Determine if this file is wanted/readable/deprecated
 308                         if (($status == 'required') && (!self::isReadableFile($fileInstance))) {
 309                                 // Nope, required file cannot be found/read from
 310                                 ApplicationEntryPoint::exitApplication(sprintf('Application "%s" does not have required file "%s.php". Please add it.', $application, $fileInstance->getBasename()));
 311                         } elseif (($fileInstance->isFile()) && (!$fileInstance->isReadable())) {
 312                                 // Found, not readable file
 313                                 ApplicationEntryPoint::exitApplication(sprintf('File "%s.php" from application "%s" cannot be read. Please fix CHMOD.', $fileInstance->getBasename(), $application));
 314                         } elseif (($status != 'required') && (!self::isReadableFile($fileInstance))) {
 315                                 // Not found but optional/deprecated file, skip it
 316                                 continue;
 317                         }
 318
 319                         // Is the file deprecated?
 320                         if ($status == 'deprecated') {
 321                                 // Issue warning
 322                                 trigger_error(sprintf('Deprecated file "%s.php" found, will not load it to avoid problems. Please remove it from your application "%s" to avoid this warning.', $fileName, $application), E_USER_WARNING);
 323
 324                                 // Skip loading deprecated file
 325                                 continue;
 326                         } // END - if
 327
 328                         // Load it
 329                         self::loadInclude($fileInstance);
 330                 } // END - foreach
 331
 332                 // Scan for application's classes, exceptions and interfaces
 333                 ClassLoader::scanApplicationClasses();
 334         }
 335
 336         /**
 337          * Starts a fully initialized application, the class ApplicationHelper must
 338          * be loaded at this point.
 339          *
 340          * @return      void
 341          */
 342         public static function startApplication () {
 343                 // Configuration entry 'detected_app_name' must be set, get it here
 344                 $application = self::getConfigurationInstance()->getConfigEntry('detected_app_name');
 345
 346                 // Is there an application helper instance?
 347                 $applicationInstance = call_user_func_array(
 348                         array(
 349                                 'Org\Mxchange\CoreFramework\Helper\Application\ApplicationHelper', 'getSelfInstance'
 350                         ), []
 351                 );
 352
 353                 // Some sanity checks
 354                 if ((empty($applicationInstance)) || (is_null($applicationInstance))) {
 355                         // Something went wrong!
 356                         ApplicationEntryPoint::exitApplication(sprintf('[Main:] The application <span class="app_name">%s</span> could not be launched because the helper class <span class="class_name">%s</span> is not loaded.',
 357                                 $application,
 358                                 'Org\Mxchange\CoreFramework\Helper\Application\ApplicationHelper'
 359                         ));
 360                 } elseif (!is_object($applicationInstance)) {
 361                         // No object!
 362                         ApplicationEntryPoint::exitApplication(sprintf('[Main:] The application <span class="app_name">%s</span> could not be launched because &#39;app&#39; is not an object (%s).',
 363                                 $application,
 364                                 gettype($applicationInstance)
 365                         ));
 366                 } elseif (!($applicationInstance instanceof ManageableApplication)) {
 367                         // Missing interface
 368                         ApplicationEntryPoint::exitApplication(sprintf('[Main:] The application <span class="app_name">%s</span> could not be launched because &#39;app&#39; is lacking required interface ManageableApplication.',
 369                                 $application
 370                         ));
 371                 }
 372
 373                 // Now call all methods in one go
 374                 foreach (array('setupApplicationData', 'initApplication', 'launchApplication') as $methodName) {
 375                         // Debug message
 376                         //*NOISY-DEBUG: */ printf('[%s:%d]: Calling methodName=%s ...' . PHP_EOL, __METHOD__, __LINE__, $methodName);
 377
 378                         // Call method
 379                         call_user_func(array($applicationInstance, $methodName));
 380                 } // END - foreach
 381         }
 382
 383         /**
 384          * Initializes database instance, no need to double-call this method
 385          *
 386          * @return      void
 387          */
 388         public static function initDatabaseInstance () {
 389                 // Get application instance
 390                 $applicationInstance = ApplicationHelper::getSelfInstance();
 391
 392                 // Is the database instance already set?
 393                 if (self::getDatabaseInstance() instanceof DatabaseConnector) {
 394                         // Yes, then abort here
 395                         throw new BadMethodCallException('Method called twice.');
 396                 } // END - if
 397
 398                 // Initialize database layer
 399                 $databaseInstance = ObjectFactory::createObjectByConfiguredName(self::getConfigurationInstance()->getConfigEntry('database_type') . '_class');
 400
 401                 // Prepare database instance
 402                 $connectionInstance = DatabaseConnection::createDatabaseConnection(DebugMiddleware::getSelfInstance(), $databaseInstance);
 403
 404                 // Set it in application helper
 405                 self::setDatabaseInstance($connectionInstance);
 406         }
 407
 408         /**
 409          * Detects the server address (SERVER_ADDR) and set it in configuration
 410          *
 411          * @return      $serverAddress  The detected server address
 412          * @throws      UnknownHostnameException        If SERVER_NAME cannot be resolved to an IP address
 413          * @todo        Have to check some more entries from $_SERVER here
 414          */
 415         public static function detectServerAddress () {
 416                 // Is the entry set?
 417                 if (!isset(self::$serverAddress)) {
 418                         // Is it set in $_SERVER?
 419                         if (!empty($_SERVER['SERVER_ADDR'])) {
 420                                 // Set it from $_SERVER
 421                                 self::$serverAddress = $_SERVER['SERVER_ADDR'];
 422                         } elseif (isset($_SERVER['SERVER_NAME'])) {
 423                                 // Resolve IP address
 424                                 $serverIp = ConsoleTools::resolveIpAddress($_SERVER['SERVER_NAME']);
 425
 426                                 // Is it valid?
 427                                 if ($serverIp === false) {
 428                                         /*
 429                                          * Why is gethostbyname() returning the host name and not
 430                                          * false as many other PHP functions are doing? ;-(
 431                                          */
 432                                         throw new UnknownHostnameException(sprintf('Cannot resolve "%s" to an IP address. Please fix your setup.', $_SERVER['SERVER_NAME']));
 433                                 } // END - if
 434
 435                                 // Al fine, set it
 436                                 self::$serverAddress = $serverIp;
 437                         } else {
 438                                 // Run auto-detecting through console tools lib
 439                                 self::$serverAddress = ConsoleTools::acquireSelfIpAddress();
 440                         }
 441                 } // END - if
 442
 443                 // Return it
 444                 return self::$serverAddress;
 445         }
 446
 447         /**
 448          * Setter for default time zone (must be correct!)
 449          *
 450          * @param       $timezone       The timezone string (e.g. Europe/Berlin)
 451          * @return      $success        If timezone was accepted
 452          * @throws      NullPointerException    If $timezone is NULL
 453          * @throws      InvalidArgumentException        If $timezone is empty
 454          */
 455         public static function setDefaultTimezone ($timezone) {
 456                 // Is it null?
 457                 if (is_null($timezone)) {
 458                         // Throw NPE
 459                         throw new NullPointerException(NULL, BaseFrameworkSystem::EXCEPTION_IS_NULL_POINTER);
 460                 } elseif (!is_string($timezone)) {
 461                         // Is not a string
 462                         throw new InvalidArgumentException(sprintf('timezone[]=%s is not a string', gettype($timezone)));
 463                 } elseif ((is_string($timezone)) && (empty($timezone))) {
 464                         // Entry is empty
 465                         throw new InvalidArgumentException('timezone is empty');
 466                 }
 467
 468                 // Default success
 469                 $success = FALSE;
 470
 471                 /*
 472                  * Set desired time zone to prevent date() and related functions to
 473                  * issue an E_WARNING.
 474                  */
 475                 $success = date_default_timezone_set($timezone);
 476
 477                 // Return status
 478                 return $success;
 479         }
 480
 481         /**
 482          * Checks whether HTTPS is set in $_SERVER
 483          *
 484          * @return      $isset  Whether HTTPS is set
 485          * @todo        Test more fields
 486          */
 487         public static function isHttpSecured () {
 488                 return (
 489                         (
 490                                 (
 491                                         isset($_SERVER['HTTPS'])
 492                                 ) && (
 493                                         strtolower($_SERVER['HTTPS']) == 'on'
 494                                 )
 495                         ) || (
 496                                 (
 497                                         isset($_SERVER['HTTP_X_FORWARDED_PROTO'])
 498                                 ) && (
 499                                         strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']) == 'https'
 500                                 )
 501                         )
 502                 );
 503         }
 504
 505         /**
 506          * Dectect and return the base URL for all URLs and forms
 507          *
 508          * @return      $baseUrl        Detected base URL
 509          */
 510         public static function detectBaseUrl () {
 511                 // Initialize the URL
 512                 $protocol = 'http';
 513
 514                 // Do we have HTTPS?
 515                 if (self::isHttpSecured()) {
 516                         // Add the >s< for HTTPS
 517                         $protocol = 'https';
 518                 } // END - if
 519
 520                 // Construct the full URL and secure it against CSRF attacks
 521                 $baseUrl = sprintf('%s://%s%s', $protocol, self::detectDomain(), self::detectScriptPath());
 522
 523                 // Return the URL
 524                 return $baseUrl;
 525         }
 526
 527         /**
 528          * Detect safely and return the full domain where this script is installed
 529          *
 530          * @return      $fullDomain             The detected full domain
 531          */
 532         public static function detectDomain () {
 533                 // Full domain is localnet.invalid by default
 534                 $fullDomain = 'localnet.invalid';
 535
 536                 // Is the server name there?
 537                 if (isset($_SERVER['SERVER_NAME'])) {
 538                         // Detect the full domain
 539                         $fullDomain = htmlentities(strip_tags($_SERVER['SERVER_NAME']), ENT_QUOTES);
 540                 } // END - if
 541
 542                 // Return it
 543                 return $fullDomain;
 544         }
 545
 546         /**
 547          * Detect safely the script path without trailing slash which is the glue
 548          * between "http://your-domain.invalid/" and "script-name.php"
 549          *
 550          * @return      $scriptPath             The script path extracted from $_SERVER['SCRIPT_NAME']
 551          */
 552         public static function detectScriptPath () {
 553                 // Default is empty
 554                 $scriptPath = '';
 555
 556                 // Is the scriptname set?
 557                 if (isset($_SERVER['SCRIPT_NAME'])) {
 558                         // Get dirname from it and replace back-slashes with slashes for lame OSes...
 559                         $scriptPath = str_replace("\\", '/', dirname($_SERVER['SCRIPT_NAME']));
 560                 } // END - if
 561
 562                 // Return it
 563                 return $scriptPath;
 564         }
 565
 566         /**
 567          * 1) Loads class scanner and scans all framework's classes and interfaces.
 568          * This method also registers the class loader's method autoLoad() for the
 569          * SPL auto-load feature. Remember that you can register additional methods
 570          * (not functions, please) for other libraries.
 571          *
 572          * Yes, I know about Composer, but I like to keep my class loader around.
 573          * You can always use mine as long as your classes have a namespace
 574          * according naming-convention: Vendor\Project\Group[\SubGroup]
 575          *
 576          * @return      void
 577          */
 578         private static function scanFrameworkClasses () {
 579                 // Include the class loader function
 580                 require self::getConfigurationInstance()->getConfigEntry('framework_base_path') . 'loader/class_ClassLoader.php';
 581
 582                 // Register auto-load function with the SPL
 583                 spl_autoload_register('Org\Mxchange\CoreFramework\Loader\ClassLoader::autoLoad');
 584
 585                 // Scan for all framework classes, exceptions and interfaces
 586                 ClassLoader::scanFrameworkClasses();
 587         }
 588
 589         /**
 590          * 2) Determines request/response type and stores the created
 591          * request/response instances in this object for later usage.
 592          *
 593          * @return      void
 594          */
 595         private static function determineRequestType () {
 596                 // Determine request type
 597                 $request = self::getRequestTypeFromSystem();
 598                 $requestType = self::getRequestTypeFromSystem();
 599
 600                 // Create a new request object
 601                 $requestInstance = ObjectFactory::createObjectByName(sprintf('Org\Mxchange\CoreFramework\Request\%sRequest', StringUtils::convertToClassName($request)));
 602
 603                 // Remember request instance here
 604                 self::setRequestInstance($requestInstance);
 605
 606                 // Do we have another response?
 607                 if ($requestInstance->isRequestElementSet('request')) {
 608                         // Then use it
 609                         $request = strtolower($requestInstance->getRequestElement('request'));
 610                         $requestType = $request;
 611                 } // END - if
 612
 613                 // ... and a new response object
 614                 $responseClass = sprintf('Org\Mxchange\CoreFramework\Response\%sResponse', StringUtils::convertToClassName($request));
 615                 $responseInstance = ObjectFactory::createObjectByName($responseClass);
 616
 617                 // Remember response instance here
 618                 self::setResponseInstance($responseInstance);
 619         }
 620
 621         /**
 622          * 3) Validate parameter 'application' if it is set and the application is there.
 623          *
 624          * @return      void
 625          */
 626         private static function validateApplicationParameter () {
 627                 // Is the parameter set?
 628                 if (!self::getRequestInstance()->isRequestElementSet('app')) {
 629                         /*
 630                          * Don't continue here, the application 'selector' is no longer
 631                          * supported and only existed as an idea to select the proper
 632                          * application (by user).
 633                          */
 634                         ApplicationEntryPoint::exitApplication('No application specified. Please provide a parameter "app" and retry.');
 635                 } // END - if
 636
 637                 // Get it for local usage
 638                 $application = self::getRequestInstance()->getRequestElement('app');
 639
 640                 // Secure it, by keeping out tags
 641                 $application = htmlentities(strip_tags($application), ENT_QUOTES);
 642
 643                 // Secure it a little more with a reg.exp.
 644                 $application = preg_replace('/([^a-z0-9_-])+/i', '', $application);
 645
 646                 // Construct FQPN (Full-Qualified Path Name) for ApplicationHelper class
 647                 $applicationPath = sprintf(
 648                         '%s%s%s',
 649                         self::getConfigurationInstance()->getConfigEntry('application_base_path'),
 650                         $application,
 651                         DIRECTORY_SEPARATOR
 652                 );
 653
 654                 // Full path for application
 655                 // Is the path there? This secures a bit the parameter (from untrusted source).
 656                 if ((!is_dir($applicationPath)) || (!is_readable($applicationPath))) {
 657                         // Not found or not readable
 658                         ApplicationEntryPoint::exitApplication(sprintf('Application "%s" not found.', $application));
 659                 } // END - if
 660
 661                 // Set the detected application's name and full path for later usage
 662                 self::getConfigurationInstance()->setConfigEntry('detected_full_app_path', $applicationPath);
 663                 self::getConfigurationInstance()->setConfigEntry('detected_app_name'     , $application);
 664         }
 665
 666         /**
 667          * Getter for request instance
 668          *
 669          * @return      $requestInstance        An instance of a Requestable class
 670          */
 671         public static function getRequestInstance () {
 672                 return self::$requestInstance;
 673         }
 674
 675         /**
 676          * Getter for response instance
 677          *
 678          * @return      $responseInstance       An instance of a Responseable class
 679          */
 680         public static function getResponseInstance () {
 681                 return self::$responseInstance;
 682         }
 683
 684         /**
 685          * Setter for request instance
 686          *
 687          * @param       $requestInstance        An instance of a Requestable class
 688          * @return      void
 689          */
 690         private static function setRequestInstance (Requestable $requestInstance) {
 691                 self::$requestInstance = $requestInstance;
 692         }
 693
 694         /**
 695          * Setter for response instance
 696          *
 697          * @param       $responseInstance       An instance of a Responseable class
 698          * @return      void
 699          */
 700         private static function setResponseInstance (Responseable $responseInstance) {
 701                 self::$responseInstance = $responseInstance;
 702         }
 703
 704         /**
 705          * Setter for database instance
 706          *
 707          * @param       $databaseInstance       An instance of a DatabaseConnection class
 708          * @return      void
 709          */
 710         public static function setDatabaseInstance (DatabaseConnection $databaseInstance) {
 711                 self::$databaseInstance = $databaseInstance;
 712         }
 713
 714         /**
 715          * Getter for database instance
 716          *
 717          * @return      $databaseInstance       An instance of a DatabaseConnection class
 718          */
 719         public static function getDatabaseInstance () {
 720                 // Return instance
 721                 return self::$databaseInstance;
 722         }
 723
 724         /**
 725          * Private getter for language instance
 726          *
 727          * @return      $languageInstance       An instance of a ManageableLanguage class
 728          */
 729         public static function getLanguageInstance () {
 730                 return self::$languageInstance;
 731         }
 732
 733         /**
 734          * Setter for language instance
 735          *
 736          * @param       $languageInstance       An instance of a ManageableLanguage class
 737          * @return      void
 738          */
 739         public static function setLanguageInstance (ManageableLanguage $languageInstance) {
 740                 self::$languageInstance = $languageInstance;
 741         }
 742
 743 }