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<?php |
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declare(strict_types=1); |
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namespace Nymfonya\Component\Http; |
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use Closure; |
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use Nymfonya\Component\Container; |
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use Nymfonya\Component\Http\Interfaces\MiddlewareInterface; |
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/** |
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* Nymfonya\Component\Http\Middleware |
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* |
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* is a copy/paste from onion team. |
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* |
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* @see https://github.com/esbenp/onion |
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* @todo Thanks onion team, but composer install fails. |
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*/ |
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class Middleware |
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{ |
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protected static $excMsg = ' is not a valid onion layer.'; |
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protected $layers; |
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/** |
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* instanciate |
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* |
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* @param array $layers |
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*/ |
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public function __construct(array $layers = []) |
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{ |
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$this->layers = $layers; |
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} |
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/** |
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* Add layer(s) or Middleware |
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* |
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* @param mixed $layers |
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* @return Middleware |
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*/ |
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public function layer($layers) |
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{ |
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if ($layers instanceof Middleware) { |
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$layers = $layers->toArray(); |
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} |
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if ($layers instanceof MiddlewareInterface) { |
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$layers = [$layers]; |
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} |
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if (!is_array($layers)) { |
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throw new \InvalidArgumentException( |
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get_class($layers) . self::$excMsg |
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); |
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} |
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return new static(array_merge($this->layers, $layers)); |
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} |
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/** |
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* Run middleware around core function and pass an |
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* object through it |
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* |
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* @param Container $container |
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* @param Closure $core |
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* @return mixed |
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*/ |
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public function peel(Container $container, Closure $core) |
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{ |
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$coreFunction = $this->createCoreFunction($core); |
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$layers = array_reverse($this->layers); |
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$completeMiddleware = array_reduce( |
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$layers, |
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[$this, 'createLayer'], |
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$coreFunction |
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); |
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return $completeMiddleware($container); |
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} |
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/** |
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* Get the layers of this onion, |
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* can be used to merge with another onion |
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* |
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* @return array |
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*/ |
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public function toArray(): array |
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{ |
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return $this->layers; |
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} |
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/** |
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* The inner function of the onion. |
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* this will be wrapped on layers |
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* |
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* @param Closure $core the core function |
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* @return Closure |
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*/ |
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1 |
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protected function createCoreFunction(Closure $core): Closure |
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{ |
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return function ($object) use ($core) { |
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return $core($object); |
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}; |
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} |
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/** |
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* Get an onion layer function. |
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* we get the object from a previous layer and pass it inwards |
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* |
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* @param Closure $nextLayer |
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* @param MiddlewareInterface $layer |
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* @return Closure |
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*/ |
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protected function createLayer(Closure $nextLayer, MiddlewareInterface $layer): Closure |
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{ |
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return function ($object) use ($nextLayer, $layer) { |
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return $layer->peel($object, $nextLayer); |
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}; |
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} |
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} |
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pierre-fromager /
nymfonya-http-foundation
