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<?php
/**
* @see https://github.com/laminas/laminas-zendframework-bridge for the canonical source repository
* @copyright https://github.com/laminas/laminas-zendframework-bridge/blob/master/COPYRIGHT.md
* @license https://github.com/laminas/laminas-zendframework-bridge/blob/master/LICENSE.md New BSD License
*/
namespace Laminas\ZendFrameworkBridge;
use ArrayObject;
use Composer\Autoload\ClassLoader;
use RuntimeException;
use function array_values;
use function class_alias;
use function class_exists;
use function explode;
use function file_exists;
use function interface_exists;
use function spl_autoload_register;
use function strlen;
use function strtr;
use function substr;
use function trait_exists;
/**
* Alias legacy Zend Framework project classes/interfaces/traits to Laminas equivalents.
*/
class Autoloader
{
/**
* Attach autoloaders for managing legacy ZF artifacts.
*
* We attach two autoloaders:
*
* - The first is _prepended_ to handle new classes and add aliases for
* legacy classes. PHP expects any interfaces implemented, classes
* extended, or traits used when declaring class_alias() to exist and/or
* be autoloadable already at the time of declaration. If not, it will
* raise a fatal error. This autoloader helps mitigate errors in such
* situations.
*
* - The second is _appended_ in order to create aliases for legacy
* classes.
*/
public static function load()
{
$loaded = new ArrayObject([]);
spl_autoload_register(self::createPrependAutoloader(
RewriteRules::namespaceReverse(),
self::getClassLoader(),
$loaded
), true, true);
spl_autoload_register(self::createAppendAutoloader(
RewriteRules::namespaceRewrite(),
$loaded
));
}
/**
* @return ClassLoader
* @throws RuntimeException
*/
private static function getClassLoader()
{
if (file_exists(__DIR__ . '/../../../autoload.php')) {
return include __DIR__ . '/../../../autoload.php';
}
if (file_exists(__DIR__ . '/../vendor/autoload.php')) {
return include __DIR__ . '/../vendor/autoload.php';
}
throw new RuntimeException('Cannot detect composer autoload. Please run composer install');
}
/**
* @return callable
*/
private static function createPrependAutoloader(array $namespaces, ClassLoader $classLoader, ArrayObject $loaded)
{
/**
* @param string $class Class name to autoload
* @return void
*/
return static function ($class) use ($namespaces, $classLoader, $loaded) {
if (isset($loaded[$class])) {
return;
}
$segments = explode('\\', $class);
$i = 0;
$check = '';
while (isset($segments[$i + 1], $namespaces[$check . $segments[$i] . '\\'])) {
$check .= $segments[$i] . '\\';
++$i;
}
if ($check === '') {
return;
}
if ($classLoader->loadClass($class)) {
$legacy = $namespaces[$check]
. strtr(substr($class, strlen($check)), [
'ApiTools' => 'Apigility',
'Mezzio' => 'Expressive',
'Laminas' => 'Zend',
]);
class_alias($class, $legacy);
}
};
}
/**
* @return callable
*/
private static function createAppendAutoloader(array $namespaces, ArrayObject $loaded)
{
/**
* @param string $class Class name to autoload
* @return void
*/
return static function ($class) use ($namespaces, $loaded) {
$segments = explode('\\', $class);
if ($segments[0] === 'ZendService' && isset($segments[1])) {
$segments[0] .= '\\' . $segments[1];
unset($segments[1]);
$segments = array_values($segments);
}
$i = 0;
$check = '';
// We are checking segments of the namespace to match quicker
while (isset($segments[$i + 1], $namespaces[$check . $segments[$i] . '\\'])) {
$check .= $segments[$i] . '\\';
++$i;
}
if ($check === '') {
return;
}
$alias = $namespaces[$check]
. strtr(substr($class, strlen($check)), [
'Apigility' => 'ApiTools',
'Expressive' => 'Mezzio',
'Zend' => 'Laminas',
'AbstractZendServer' => 'AbstractZendServer',
'ZendServerDisk' => 'ZendServerDisk',
'ZendServerShm' => 'ZendServerShm',
'ZendMonitor' => 'ZendMonitor',
]);
$loaded[$alias] = true;
if (class_exists($alias) || interface_exists($alias) || trait_exists($alias)) {
class_alias($alias, $class);
}
};
}
}
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