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<?php
/**
* Auloader calsses
*
* Standard: PSR-2
* @link http://www.php-fig.org/psr/psr-2
*
* @package Duplicator
* @copyright (c) 2021, Snapcreek LLC
*
*/
namespace Duplicator\Installer\Utils;
final class Autoloader
{
const ROOT_NAMESPACE = 'Duplicator\\';
const ROOT_INSTALLER_NAMESPACE = 'Duplicator\\Installer\\';
const ROOT_ADDON_INSTALLER_NAMESPACE = 'Duplicator\\Installer\\Addons\\';
const ROOT_LIBS_NAMESPACE = 'Duplicator\\Libs\\';
protected static $nameSpacesMapping = null;
/**
* register autooader
*
* @return void
*/
public static function register()
{
spl_autoload_register(array(__CLASS__, 'load'));
}
/**
*
* @param string $className class name
*
* @return boolean
*/
public static function load($className)
{
// @todo remove legacy logic in autoloading when duplicator is fully converted.
if (strpos($className, self::ROOT_NAMESPACE) !== 0) {
return false;
}
if (($filepath = self::getAddonFile($className)) === false) {
foreach (self::getNamespacesMapping() as $namespace => $mappedPath) {
if (strpos($className, $namespace) !== 0) {
continue;
}
$filepath = $mappedPath . str_replace('\\', '/', substr($className, strlen($namespace))) . '.php';
if (file_exists($filepath)) {
include_once($filepath);
return true;
}
}
} else {
if (file_exists($filepath)) {
include_once($filepath);
return true;
}
}
return false;
}
/**
*
* @param string $class class name
*
* @return boolean|string
*/
protected static function getAddonFile($class)
{
$matches = null;
if (preg_match('/^\\\\?Duplicator\\\\Installer\\\\Addons\\\\(.+?)\\\\(.+)$/', $class, $matches) !== 1) {
return false;
}
$addonName = $matches[1];
$subClass = $matches[2];
$basePath = DUPX_INIT . '/addons/' . strtolower($addonName) . '/';
if (self::endsWith($class, $addonName) === false) {
$basePath .= 'src/';
}
return $basePath . str_replace('\\', '/', $subClass) . '.php';
}
/**
*
* @staticvar [string] $mapping
* @return [string]
*/
protected static function getNamespacesMapping()
{
// the order is important, it is necessary to insert the longest namespaces first
return array(
self::ROOT_ADDON_INSTALLER_NAMESPACE => DUPX_INIT . '/addons/',
self::ROOT_INSTALLER_NAMESPACE => DUPX_INIT . '/src/',
self::ROOT_LIBS_NAMESPACE => DUPX_INIT . '/libs/'
);
}
/**
* Returns true if the $haystack string end with the $needle, only for internal use
*
* @param string $haystack The full string to search in
* @param string $needle The string to for
*
* @return bool Returns true if the $haystack string starts with the $needle
*/
protected static function endsWith($haystack, $needle)
{
$length = strlen($needle);
if ($length == 0) {
return true;
}
return (substr($haystack, -$length) === $needle);
}
}
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