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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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declare(strict_types = 1); |
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namespace PHPinnacle\Ensign; |
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use Amp\LazyPromise; |
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use Amp\Coroutine; |
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use Amp\Promise; |
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final class SignalDispatcher implements Dispatcher |
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{ |
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/** |
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* @var HandlerRegistry |
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*/ |
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private $handlers; |
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/** |
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* @param HandlerRegistry $handlers |
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*/ |
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public function __construct(HandlerRegistry $handlers) |
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{ |
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$this->handlers = $handlers; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function dispatch($signal, ...$arguments): Promise |
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{ |
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if (!$signal instanceof Signal) { |
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$signal = Signal::create($signal, $arguments); |
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} |
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return new LazyPromise(function () use ($signal) { |
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$handler = $this->handler($signal); |
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$result = $handler(...$signal->arguments()); |
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return $result instanceof \Generator ? new Coroutine($this->recoil($result)) : $result; |
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}); |
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} |
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/** |
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* @param Signal $signal |
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* |
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* @return Handler |
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*/ |
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private function handler(Signal $signal): Handler |
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{ |
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$name = $signal->name(); |
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return $this->handlers->get($name) ?: Handler::unknown($name); |
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} |
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/** |
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* @param \Generator $generator |
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* |
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* @return mixed |
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*/ |
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private function recoil(\Generator $generator) |
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{ |
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while ($generator->valid()) { |
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try { |
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$key = $generator->key(); |
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$current = $generator->current(); |
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$generator->send(yield $this->adapt($key, $current)); |
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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 $generator->getReturn(); |
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} |
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/** |
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* @param int|string $key |
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* @param mixed $value |
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* |
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* @return mixed |
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*/ |
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private function adapt($key, $value) |
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{ |
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if ($value instanceof Signal) { |
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return $this->dispatch($value); |
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} |
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if (\is_string($key)) { |
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$current = \is_array($value) ? \array_values($value) : [$value]; |
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return $this->dispatch($key, ...$current); |
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} |
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return $value; |
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} |
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} |
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phpinnacle /
ensign
