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<?php |
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/** |
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* This file is part of PHPinnacle/Ensign. |
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* |
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* (c) PHPinnacle Team <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace PHPinnacle\Ensign; |
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use Amp\Coroutine; |
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use Amp\LazyPromise; |
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use PHPinnacle\Identity\UUID; |
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final class Kernel |
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{ |
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/** |
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* @var Contract\Processor |
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*/ |
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private $processor; |
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/** |
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* @var callable[] |
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*/ |
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private $interruptions = []; |
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/** |
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* @param Contract\Processor $processor |
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*/ |
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public function __construct(Contract\Processor $processor = null) |
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{ |
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$this->processor = $processor ?: new Processor\SimpleProcessor(); |
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} |
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/** |
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* @param string $interrupt |
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* @param callable $handler |
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* |
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* @return void |
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*/ |
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public function interrupt(string $interrupt, callable $handler): void |
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{ |
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$this->interruptions[$interrupt] = $handler; |
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} |
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/** |
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* @param callable $handler |
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* @param array $arguments |
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* |
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* @return Action |
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*/ |
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public function execute(callable $handler, array $arguments): Action |
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{ |
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$id = UUID::random(); |
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$token = new Token($id); |
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$promise = new LazyPromise(function () use ($handler, $arguments, $token) { |
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return $this->adapt($this->processor->execute($handler, $arguments), $token); |
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}); |
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return new Action($id, $promise, $token); |
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} |
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/** |
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* @param mixed $value |
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* @param Token $token |
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* |
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* @return mixed |
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*/ |
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private function adapt($value, Token $token) |
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{ |
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return $value instanceof \Generator ? new Coroutine($this->recoil($value, $token)) : $value; |
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} |
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/** |
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* @param \Generator $generator |
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* @param Token $token |
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* |
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* @return mixed |
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*/ |
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private function recoil(\Generator $generator, Token $token) |
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{ |
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while ($generator->valid()) { |
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$token->guard(); |
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try { |
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$value = $this->intercept($generator->key(), $generator->current()); |
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$generator->send(yield $this->adapt($value, $token)); |
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} catch (\Exception $error) { |
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/** @scrutinizer ignore-call */ |
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$generator->throw($error); |
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} |
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} |
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return $this->adapt($generator->getReturn(), $token); |
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} |
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/** |
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* @param int|string $key |
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* @param mixed $value |
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* |
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* @return mixed |
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*/ |
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private function intercept($key, $value) |
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{ |
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$interrupt = \is_string($key) ? $key : $value; |
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if (\is_object($interrupt)) { |
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$interrupt = \get_class($interrupt); |
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} |
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if (!\is_string($interrupt) || !isset($this->interruptions[$interrupt])) { |
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return $value; |
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} |
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$interceptor = $this->interruptions[$interrupt]; |
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$value = \is_array($value) ? $value : [$value]; |
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return $interceptor(...$value); |
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} |
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} |
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phpinnacle /
ensign
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