inc/classes/middleware/compressor/class_CompressorChannel.php

   1 <?php
   2 /**
   3  * Middleware class for selecting the right compressor channel
   4  *
   5  * @author              Roland Haeder <webmaster@shipsimu.org>
   6  * @version             0.0.0
   7  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2013 Core Developer Team
   8  * @license             GNU GPL 3.0 or any newer version
   9  * @link                http://www.shipsimu.org
  10  *
  11  * This program is free software: you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation, either version 3 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  23  */
  24 class CompressorChannel extends BaseMiddleware implements Registerable {
  25         /**
  26          * Real compressor instance
  27          */
  28         private $compressor = NULL;
  29
  30         /**
  31          * Protected constructor
  32          *
  33          * @return      void
  34          */
  35         protected function __construct () {
  36                 // Call parent constructor!
  37                 parent::__construct(__CLASS__);
  38         }
  39
  40         /**
  41          * Create a new compressor channel.
  42          *
  43          * @return      $compressorInstance             A prepared instance of this class
  44          */
  45         public static final function createCompressorChannel () {
  46                 // Get new instance
  47                 $compressorInstance = new CompressorChannel();
  48
  49                 // Is the compressor handler set?
  50                 if (
  51                            (is_null($compressorInstance->getCompressor()))
  52                         || (!$compressorInstance->getCompressor() instanceof Compressor)
  53                 ) {
  54                         // Init base directory
  55                         $baseDir =
  56                                 $compressorInstance->getConfigInstance()->getConfigEntry('base_path') .
  57                                 $compressorInstance->getConfigInstance()->getConfigEntry('compressor_base_path');
  58
  59                         // Get a directory pointer
  60                         $directoryInstance = ObjectFactory::createObjectByConfiguredName('directory_class', array($baseDir));
  61
  62                         // Read all directories but no sub directories, .htaccess files and NullCompressor class
  63                         while ($directoryEntry = $directoryInstance->readDirectoryExcept(array('.htaccess', 'class_NullCompressor.php'))) {
  64                                 // Is this a class file?
  65                                 if ((substr($directoryEntry, 0, 6) == 'class_') && (substr($directoryEntry, -4, 4) == '.php')) {
  66                                         /* Get the compressor's name. That's why you must name
  67                                          * your files like your classes and also that's why you
  68                                          * must keep on class in one file.
  69                                          */
  70                                         $className = substr($directoryEntry, 6, -4);
  71
  72                                         // Get an instance from our object factory
  73                                         $tempInstance = ObjectFactory::createObjectByName($className);
  74
  75                                         // Is it null?
  76                                         if (is_null($tempInstance)) {
  77                                                 // Then skip to the next one
  78                                                 continue;
  79                                         } // END - if
  80
  81                                         // Set the compressor
  82                                         $compressorInstance->setCompressor($tempInstance);
  83
  84                                         // No more searches required because we have found a valid compressor stream
  85                                         break;
  86                                 } // END - if
  87                         } // END - while
  88
  89                         // Close the directory
  90                         $directoryInstance->closeDirectory();
  91                 } // END - if
  92
  93                 // Check again if there is a compressor
  94                 if (
  95                            (is_null($compressorInstance->getCompressor()))
  96                         || (!is_object($compressorInstance->getCompressor()))
  97                         || (!$compressorInstance instanceof Compressor)
  98                 ) {
  99                         // Set the null compressor handler. This should not be configureable!
 100                         // @TODO Is there a configurable fall-back compressor needed, or is NullCompressor okay?
 101                         $compressorInstance->setCompressor(ObjectFactory::createObjectByName('NullCompressor'));
 102                 } // END - if
 103
 104                 // Return the compressor instance
 105                 return $compressorInstance;
 106         }
 107
 108         /**
 109          * Getter for compressor instance
 110          *
 111          * @return      $compressor     The compressor instance
 112          */
 113         public final function getCompressor () {
 114                 return $this->compressor;
 115         }
 116
 117         /**
 118          * Setter for compressor
 119          *
 120          * @param               $compressorInstance     The compressor instance we shall use
 121          * @return      void
 122          */
 123         public final function setCompressor (Compressor $compressorInstance = NULL) {
 124                 $this->compressor = $compressorInstance;
 125         }
 126
 127         /**
 128          * Getter for the file extension of the current compressor
 129          */
 130         public final function getCompressorExtension () {
 131                 // Get compressor extension from current compressor
 132                 return $this->getCompressor()->getCompressorExtension();
 133         }
 134 }
 135
 136 // [EOF]
 137 ?>