<?php
/**
 * Created by JetBrains PhpStorm.
 * User: Stefan Warnat <support@stefanwarnat.de>
 * Date: 19.12.13 12:27
 * You must not use this file without permission.
 */
namespace Workflow2;

/**
 * Class Autoload
 * @package TimeControl
 *
 * 2017-04-02 added registerNamespaceAlias
 */
class Autoload {
    protected static $_Registered = array();
    protected static $_NamespaceAliase = array();

    public static function autoload($classname) {
        if(!empty(self::$_NamespaceAliase)) {
            $classname = str_replace(array_keys(self::$_NamespaceAliase), array_values(self::$_NamespaceAliase), $classname);
        }

        if(strpos($classname, "_")) {
            $prefix = explode("_", $classname);
        } else {
            $prefix = explode("\\", $classname);
        }

        if(!isset(self::$_Registered[$prefix[0]])) {
            return false;
        }

        if($prefix[1] == "SWExtension") {
            if(count($prefix) == 3 && $prefix[2] == 'c'.sha1($prefix[0]."-GenKey")) {
                $origClass = $classname;
                $doAlias = true;

                $classname = str_replace("\\".$prefix[2], "\\GenKey", $classname);
            } else {
                $doAlias = false;
            }
        }

        $path = self::$_Registered[$prefix[0]]."/";
        $classNamePath = str_replace(array("_", "\\"), "/", $classname);

        if(file_exists($path.$classNamePath.".php")) {
            require_once($path.$classNamePath.".php");
        } else {
            if(strpos($classNamePath, 'Workflow/Plugins/ConnectionProvider') === 0) {
                \Workflow\ConnectionProvider::getKeyByClassname($classNamePath);
            }
            if(strpos($classNamePath, 'Workflow/OAuthHandler') === 0) {
                \Workflow\OAuth::loadHandler();
            }
        }

        if($prefix[1] == "SWExtension" && $doAlias) {
            class_alias(ltrim($classname, "\\"), ltrim($origClass, "\\"));
        }
    }

    public static function registerDirectory($directory) {
        if(substr($directory, 0, 1) == "~") {
            global $root_directory;
            $directory = $root_directory."/".substr($directory, 2);
        }

        $directory = realpath($directory);
        if(is_dir($directory)) {
            $alle = glob($directory.'/*');
            foreach($alle as $datei) {
                if(is_dir($datei)) {
                    self::register(basename($datei), $directory);
                }
            }

        }

    }

    public static function register($prefix, $directory) {
        if(substr($directory, 0, 1) == "~") {
            global $root_directory;
            $directory = $root_directory."/".substr($directory, 2);
        }

        if(file_exists($directory)) {
            self::$_Registered[$prefix] = $directory;
        }
    }

    public function registerNamespaceAlias($Alias, $ExistingNamespace) {
        self::$_NamespaceAliase[$Alias] = $ExistingNamespace;
    }
}

spl_autoload_register(__NAMESPACE__ .'\Autoload::autoload');

if(!function_exists('sw_autoload_register')) {
    function sw_autoload_register($prefix, $path)
    {
        Autoload::register($prefix, $path);
    }
}

if(file_exists(dirname(__FILE__)."/constants.php")) {
    require_once(dirname(__FILE__)."/constants.php");
}