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<?php |
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/** |
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* Copyright (c) Florian Krämer (https://florian-kraemer.net) |
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* Licensed under The MIT License |
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* For full copyright and license information, please see the LICENSE.txt |
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* Redistributions of files must retain the above copyright notice. |
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* |
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* @copyright Copyright (c) Florian Krämer (https://florian-kraemer.net) |
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* @author Florian Krämer |
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* @link https://github.com/Phauthentic |
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* @license https://opensource.org/licenses/MIT MIT License |
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*/ |
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declare(strict_types=1); |
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namespace Phauthentic\Infrastructure\Http\Dispatcher; |
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use Psr\Container\ContainerInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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/** |
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* A simple controller dispatcher middleware |
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* |
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* It will check if there is route in the request attributes. If there is a |
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* route it will take the handler and check if it is a string and tries to |
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* resolve it against the DI container. |
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*/ |
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class Dispatcher implements DispatcherInterface |
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{ |
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/** |
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* @var string |
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*/ |
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protected $defaultNamespace = ''; |
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/** |
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* @var string |
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*/ |
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protected $methodSeparator = '@'; |
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/** |
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* @var string |
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*/ |
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protected $namespaceSeparator = '.'; |
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/** |
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* @var string |
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*/ |
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protected $classTemplate = '{namespace}{className}'; |
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/** |
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* @var array |
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*/ |
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protected $classParts = []; |
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/** |
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* @var \Psr\Container\ContainerInterface; |
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*/ |
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protected $container; |
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/** |
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* @param \Psr\Container\ContainerInterface $container PSR Container |
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*/ |
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public function __construct( |
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ContainerInterface $container |
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) { |
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$this->container = $container; |
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} |
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/** |
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* @param string $namespace Namespace |
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* @return $this |
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*/ |
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public function setDefaultNamespace(string $namespace): DispatcherInterface |
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{ |
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$this->defaultNamespace = $namespace; |
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return $this; |
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} |
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/** |
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* @param array $classParts Class Template Vars |
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* @return $this |
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*/ |
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public function setClassParts(array $classParts): DispatcherInterface |
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{ |
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$this->classParts = $classParts; |
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return $this; |
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} |
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/** |
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* @param string $template Template String |
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* @return $this |
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*/ |
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public function setClassTemplate(string $template): DispatcherInterface |
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{ |
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$this->classTemplate = $template; |
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return $this; |
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} |
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/** |
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* @param string $separator Separator |
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* @return $this |
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*/ |
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public function setMethodSeparator(string $separator): DispatcherInterface |
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{ |
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$this->methodSeparator = $separator; |
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return $this; |
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} |
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/** |
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* @param string $separator Separator |
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* @return $this |
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*/ |
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public function setNamespaceSeparator(string $separator): DispatcherInterface |
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{ |
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$this->namespaceSeparator = $separator; |
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return $this; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function dispatch( |
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ServerRequestInterface $request, |
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$handler |
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): ?ResponseInterface { |
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if (is_string($handler)) { |
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$handler = $this->stringHandler($handler, $request); |
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} |
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if ($handler instanceof ResponseInterface) { |
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return $handler; |
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} |
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if ($handler instanceof RequestHandlerInterface) { |
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return $handler->handle($request); |
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} |
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if (is_callable($handler)) { |
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return $handler($request); |
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} |
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return null; |
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} |
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/** |
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* @param string $handler Handler String |
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* @param \Psr\Http\Message\ServerRequestInterface $request |
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* @return mixed |
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*/ |
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protected function stringHandler( |
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string $handler, |
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ServerRequestInterface $request |
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) { |
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$result = $this->parseString($handler); |
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if (!$this->container->has($result['className'])) { |
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return null; |
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} |
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$handler = $this->container->get($result['className']); |
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if ($result['method'] === null) { |
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return $handler; |
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} |
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return $handler->{$result['method']}($request); |
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} |
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/** |
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* @param string $handler Handler String |
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* @return array |
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*/ |
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protected function parseString(string $handler): array |
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{ |
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$namespace = $this->defaultNamespace; |
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$method = null; |
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// Determine the namespace |
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$position = strpos($handler, $this->namespaceSeparator); |
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if ($position) { |
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$namespace = strstr($handler, '.', true); |
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$handler = substr($handler, $position + 1); |
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} |
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// Determine if there is an action besides a class |
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$position = strpos($handler, $this->methodSeparator); |
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if ($position) { |
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$method = substr($handler, $position + 1); |
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$handler = substr($handler, 0, $position); |
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} |
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$fqcn = $this->classTemplate; |
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$this->classParts['className'] = $handler; |
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$this->classParts['namespace'] = $namespace; |
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foreach ($this->classParts as $placeholder => $var) { |
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$fqcn = str_replace( |
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'{' . (string)$placeholder . '}', |
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(string)$var, |
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$fqcn |
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); |
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} |
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return [ |
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'className' => $fqcn, |
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'method' => $method |
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]; |
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} |
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} |
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Phauthentic /
dispatcher-middleware
