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<?php
/**
* Akeeba Engine
* The modular PHP5 site backup engine
* @copyright Copyright (c)2009-2012 Nicholas K. Dionysopoulos
* @license GNU GPL version 3 or, at your option, any later version
* @package akeebaengine
* @version $Id$
*/
// Protection against direct access
defined('AKEEBAENGINE') or die('Restricted access');
global $Akeeba_Class_Map;
// Class map
if(empty($Akeeba_Class_Map))
{
$Akeeba_Class_Map = array(
'AECoreDomain' => 'core'.DIRECTORY_SEPARATOR.'domain',
'AECore' => 'core',
'AEUtil' => 'utils',
'AEAbstract' => 'abstract',
'AEPlatform' => 'platform',
'AEFilterStackPlatform' => 'filters'.DIRECTORY_SEPARATOR.'stack',
'AEFilterPlatform' => 'filters',
'AEDriverPlatform' => 'drivers',
'AEArchiver' => 'engines'.DIRECTORY_SEPARATOR.'archiver',
'AEDump' => 'engines'.DIRECTORY_SEPARATOR.'dump',
'AEFinalization' => 'engines'.DIRECTORY_SEPARATOR.'finalization',
'AEScan' => 'engines'.DIRECTORY_SEPARATOR.'scan',
'AEWriter' => 'engines'.DIRECTORY_SEPARATOR.'writer',
'AEPostproc' => 'engines'.DIRECTORY_SEPARATOR.'proc',
'AEFilterStack' => 'filters'.DIRECTORY_SEPARATOR.'stack',
'AEFilter' => 'filters',
'AEDriver' => 'drivers'
);
}
/**
* Loads the $class from a file in the directory $path, if and only if
* the class name starts with $prefix. Will also try the plugins path
* if the class is not present in the regular location.
* @param string $class The class name
* @param string $prefix The prefix to test
* @param string $path The path to load the class from
* @return bool True if we loaded the class
*/
function LoadIfPrefix($class, $prefix, $path)
{
// Find the root path of Akeeba's installation. Static so that we can save some CPU time.
static $root;
static $platformDirs = array();
if(empty($root))
{
if(defined('AKEEBAROOT')) {
$root = AKEEBAROOT;
} else {
$root = dirname(__FILE__);
}
}
if(empty($platformDirs)) {
$platformDirs = AEPlatform::getInstance()->getPlatformDirectories();
}
if(strpos($class, $prefix) === 0)
{
$filename = strtolower(substr($class, strlen($prefix))) . '.php';
// Try the plugins path
$filePath = $root.DIRECTORY_SEPARATOR.'plugins'.DIRECTORY_SEPARATOR.$path.DIRECTORY_SEPARATOR.$filename;
if(file_exists($filePath)) {
require_once $filePath;
if(class_exists($class, false)) return true;
}
// Try the platform overrides
foreach($platformDirs as $dir) {
$filePath = $dir.'/'.$path.'/'.$filename;
if(file_exists($filePath)) {
require_once $filePath;
if(class_exists($class, false)) return true;
}
}
// Try the regular path
$filePath = $root.DIRECTORY_SEPARATOR.$path.DIRECTORY_SEPARATOR.$filename;
if(file_exists($filePath)) {
require_once $filePath;
if(class_exists($class, false)) return true;
}
}
return false;
}
/**
* PHP5 class autoloader for all of Akeeba's classes
* @param string $class_name The class name to load
*/
function AEAutoloader($class_name)
{
global $Akeeba_Class_Map;
// We can only handle AE* class names
if(substr($class_name,0,2) != 'AE') return;
// The configuration class is a special case
if($class_name == 'AEConfiguration') {
if(defined('AKEEBAROOT')) {
$root = AKEEBAROOT;
} else {
$root = dirname(__FILE__);
}
require_once $root.DIRECTORY_SEPARATOR.'configuration.php';
}
// Try to load the class using the prefix-to-path mapping, also handles plugin path
foreach($Akeeba_Class_Map as $prefix => $path)
{
if( LoadIfPrefix($class_name, $prefix, $path) ) return;
}
return;
}