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<?php
/*
* This file is part of the TYPO3 CMS project.
*
* It is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, either version 2
* of the License, or any later version.
*
* For the full copyright and license information, please read the
* LICENSE.txt file that was distributed with this source code.
*
* The TYPO3 project - inspiring people to share!
*/
namespace TYPO3\CMS\Core\Http;
use Psr\Container\ContainerInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use TYPO3\CMS\Core\Utility\GeneralUtility;
/**
* Dispatcher which resolves a target, which was given to the request to call a controller and method (but also a callable)
* where the request contains a "target" as attribute.
*
* Used in eID Frontend Requests, see EidHandler
*/
class Dispatcher implements DispatcherInterface
{
/**
* @var ContainerInterface
*/
protected $container;
public function __construct(ContainerInterface $container)
{
$this->container = $container;
}
/**
* Main method that fetches the target from the request and calls the target directly
*
* @param ServerRequestInterface $request the current server request
* @return ResponseInterface the filled response by the callable/controller/action
* @throws \InvalidArgumentException if the defined target is invalid
*/
public function dispatch(ServerRequestInterface $request): ResponseInterface
{
$targetIdentifier = $request->getAttribute('target');
$target = $this->getCallableFromTarget($targetIdentifier);
$arguments = [$request];
return $target(...$arguments);
}
/**
* Creates a callable out of the given parameter, which can be a string, a callable / closure or an array
* which can be invoked as a function.
*
* @param array|string|callable $target the target which is being resolved.
* @return callable
* @throws \InvalidArgumentException
*/
protected function getCallableFromTarget($target)
{
if (is_array($target)) {
return $target;
}
if ($target instanceof \Closure) {
return $target;
}
// Only a class name is given
if (is_string($target) && !str_contains($target, ':')) {
$targetObject = $this->container->has($target) ? $this->container->get($target) : GeneralUtility::makeInstance($target);
if (!method_exists($targetObject, '__invoke')) {
throw new \InvalidArgumentException('Object "' . $target . '" doesn\'t implement an __invoke() method and cannot be used as target.', 1442431631);
}
return $targetObject;
}
// Check if the target is a concatenated string of "className::actionMethod"
if (is_string($target) && str_contains($target, '::')) {
[$className, $methodName] = explode('::', $target, 2);
$targetObject = $this->container->has($className) ? $this->container->get($className) : GeneralUtility::makeInstance($className);
return [$targetObject, $methodName];
}
// Closures needs to be checked at last as a string with object::method is recognized as callable
if (is_callable($target)) {
return $target;
}
throw new \InvalidArgumentException('Invalid target for "' . $target . '", as it is not callable.', 1425381442);
}
}