framework/main/middleware/compressor/class_CompressorChannel.php

   1 <?php
   2 // Own namespace
   3 namespace Org\Mxchange\CoreFramework\Middleware\Compressor;
   4
   5 // Import framework stuff
   6 use Org\Mxchange\CoreFramework\Bootstrap\FrameworkBootstrap;
   7 use Org\Mxchange\CoreFramework\Compressor\Compressor;
   8 use Org\Mxchange\CoreFramework\Factory\Object\ObjectFactory;
   9 use Org\Mxchange\CoreFramework\Middleware\BaseMiddleware;
  10 use Org\Mxchange\CoreFramework\Registry\Registerable;
  11
  12 /**
  13  * Middleware class for selecting the right compressor channel
  14  *
  15  * @author              Roland Haeder <webmaster@shipsimu.org>
  16  * @version             0.0.0
  17  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2021 Core Developer Team
  18  * @license             GNU GPL 3.0 or any newer version
  19  * @link                http://www.shipsimu.org
  20  *
  21  * This program is free software: you can redistribute it and/or modify
  22  * it under the terms of the GNU General Public License as published by
  23  * the Free Software Foundation, either version 3 of the License, or
  24  * (at your option) any later version.
  25  *
  26  * This program is distributed in the hope that it will be useful,
  27  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  28  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  29  * GNU General Public License for more details.
  30  *
  31  * You should have received a copy of the GNU General Public License
  32  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  33  */
  34 class CompressorChannel extends BaseMiddleware implements Registerable {
  35         /**
  36          * Real compressor instance
  37          */
  38         private $compressor = NULL;
  39
  40         /**
  41          * Protected constructor
  42          *
  43          * @return      void
  44          */
  45         private function __construct () {
  46                 // Call parent constructor!
  47                 parent::__construct(__CLASS__);
  48         }
  49
  50         /**
  51          * Create a new compressor channel.
  52          *
  53          * @return      $compressorInstance             A prepared instance of this class
  54          */
  55         public static final function createCompressorChannel () {
  56                 // Get new instance
  57                 $compressorInstance = new CompressorChannel();
  58
  59                 // Is the compressor handler set?
  60                 if (
  61                            (is_null($compressorInstance->getCompressor()))
  62                         || (!$compressorInstance->getCompressor() instanceof Compressor)
  63                 ) {
  64                         // Init base directory
  65                         $baseDir =
  66                                 FrameworkBootstrap::getConfigurationInstance()->getConfigEntry('framework_base_path') .
  67                                 FrameworkBootstrap::getConfigurationInstance()->getConfigEntry('compressor_base_path');
  68
  69                         // Get a directory pointer
  70                         $directoryInstance = ObjectFactory::createObjectByConfiguredName('directory_class', array($baseDir));
  71
  72                         // Read all directories but no sub directories, .htaccess files and NullCompressor class
  73                         while ($directoryEntry = $directoryInstance->readDirectoryExcept(array('class_NullCompressor.php'))) {
  74                                 // Debug message
  75                                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('COMPRESSOR: directoryEntry=' . $directoryEntry);
  76
  77                                 // Is this a class file?
  78                                 if ((substr($directoryEntry, 0, 6) == 'class_') && (substr($directoryEntry, -4, 4) == '.php')) {
  79                                         /* Get the compressor's name. That's why you must name
  80                                          * your files like your classes and also that's why you
  81                                          * must keep on class in one file.
  82                                          */
  83
  84                                         // Base name of compressor class
  85                                         $baseClassName = substr($directoryEntry, 6, -4);
  86
  87                                         // Create full class name (with namespace
  88                                         $fullClassName = sprintf(
  89                                                 'Org\Mxchange\CoreFramework\Compressor\%s\%s',
  90                                                 str_replace('Compressor', '', $baseClassName),
  91                                                 $baseClassName
  92                                         );
  93
  94                                         // Get an instance from our object factory
  95                                         $tempInstance = ObjectFactory::createObjectByName($fullClassName);
  96
  97                                         // Is it null?
  98                                         if (is_null($tempInstance)) {
  99                                                 // Then skip to the next one
 100                                                 continue;
 101                                         }
 102
 103                                         // Set the compressor
 104                                         $compressorInstance->setCompressor($tempInstance);
 105
 106                                         // No more searches required because we have found a valid compressor stream
 107                                         break;
 108                                 }
 109                         }
 110
 111                         // Close the directory
 112                         $directoryInstance->closeDirectory();
 113                 }
 114
 115                 // Check again if there is a compressor
 116                 if (
 117                            (is_null($compressorInstance->getCompressor()))
 118                         || (!is_object($compressorInstance->getCompressor()))
 119                         || (!$compressorInstance instanceof Compressor)
 120                 ) {
 121                         // Set the null compressor handler. This should not be configureable!
 122                         // @TODO Is there a configurable fall-back compressor needed, or is NullCompressor okay?
 123                         $compressorInstance->setCompressor(ObjectFactory::createObjectByName('Org\Mxchange\CoreFramework\Compressor\Null\NullCompressor'));
 124                 }
 125
 126                 // Return the compressor instance
 127                 return $compressorInstance;
 128         }
 129
 130         /**
 131          * Getter for compressor instance
 132          *
 133          * @return      $compressor     The compressor instance
 134          */
 135         public final function getCompressor () {
 136                 return $this->compressor;
 137         }
 138
 139         /**
 140          * Setter for compressor
 141          *
 142          * @param               $compressorInstance     The compressor instance we shall use
 143          * @return      void
 144          */
 145         public final function setCompressor (Compressor $compressorInstance = NULL) {
 146                 $this->compressor = $compressorInstance;
 147         }
 148
 149         /**
 150          * Getter for the file extension of the current compressor
 151          */
 152         public final function getCompressorExtension () {
 153                 // Get compressor extension from current compressor
 154                 return $this->getCompressor()->getCompressorExtension();
 155         }
 156
 157 }