<?php

namespace OAuth\Common;

/**
* PSR-0 Autoloader
*
* @author ieter Hordijk <info@pieterhordijk.com>
*/
class AutoLoader
{
/**
* @var string The namespace prefix for this instance.
*/
protected $namespace = '';

/**
* @var string The filesystem prefix to use for this instance
*/
protected $path = '';

/**
* Build the instance of the autoloader
*
* @param string $namespace The prefixed namespace this instance will load
* @param string $path The filesystem path to the root of the namespace
*/
public function __construct($namespace, $path)
{
$this->namespace = ltrim($namespace, '\\');
$this->path = rtrim($path, '/\\') . DIRECTORY_SEPARATOR;
}

/**
* Try to load a class
*
* @param string $class The class name to load
*
* @return boolean If the loading was successful
*/
public function load($class)
{
$class = ltrim($class, '\\');

if (strpos($class, $this->namespace) === 0) {
$nsparts = explode('\\', $class);
$class = array_pop($nsparts);
$nsparts[] = '';
$path = $this->path . implode(DIRECTORY_SEPARATOR, $nsparts);
$path .= str_replace('_', DIRECTORY_SEPARATOR, $class) . '.php';

if (file_exists($path)) {
require $path;

return true;
}
}

return false;
}

/**
* Register the autoloader to PHP
*
* @return boolean The status of the registration
*/
public function register()
{
return spl_autoload_register(array($this, 'load'));
}

/**
* Unregister the autoloader to PHP
*
* @return boolean The status of the unregistration
*/
public function unregister()
{
return spl_autoload_unregister(array($this, 'load'));
}
}