includes/media/MediaHandlerFactory.php

   1 <?php
   2 /**
   3  * Media-handling base classes and generic functionality.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Media
  22  */
  23
  24 /**
  25  * Class to construct MediaHandler objects
  26  *
  27  * @since 1.28
  28  */
  29 class MediaHandlerFactory {
  30
  31         /**
  32          * @var MediaHandler[]
  33          */
  34         private $handlers;
  35
  36         /**
  37          * @param string $type mimetype
  38          * @return bool|MediaHandler
  39          */
  40         public function getHandler( $type ) {
  41                 global $wgMediaHandlers;
  42                 if ( !isset( $wgMediaHandlers[$type] ) ) {
  43                         wfDebug( __METHOD__ . ": no handler found for $type.\n" );
  44
  45                         return false;
  46                 }
  47                 $class = $wgMediaHandlers[$type];
  48                 if ( !isset( $this->handlers[$class] ) ) {
  49                         $this->handlers[$class] = new $class;
  50                         if ( !$this->handlers[$class]->isEnabled() ) {
  51                                 wfDebug( __METHOD__ . ": $class is not enabled\n" );
  52                                 $this->handlers[$class] = false;
  53                         }
  54                 }
  55
  56                 return $this->handlers[$class];
  57         }
  58 }