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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\Coroutine; |
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use Amp\Failure; |
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use Amp\InvalidYieldError; |
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use Amp\Promise; |
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use Amp\Success; |
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final class 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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* @param string|object $signal |
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* @param mixed[] ...$arguments |
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* |
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* @return Promise |
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*/ |
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public function dispatch($signal, ...$arguments): Promise |
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{ |
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if (\is_object($signal)) { |
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\array_unshift($arguments, $signal); |
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$signal = \get_class($signal); |
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} |
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return $this->call($this->handlers->get($signal), $arguments); |
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} |
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/** |
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* @param callable $handler |
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* @param mixed[] $arguments |
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* |
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* @return Promise |
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*/ |
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private function call(callable $handler, array $arguments): Promise |
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{ |
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try { |
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$result = $handler(...$arguments); |
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} catch (\Throwable $error) { |
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return new Failure($error); |
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} |
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if ($result instanceof \Generator) { |
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return new Coroutine($this->recoil($result)); |
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} |
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return $result instanceof Promise ? $result : new Success($result); |
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} |
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/** |
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* @param \Generator $generator |
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* |
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* @return \Generator |
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*/ |
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private function recoil(\Generator $generator): \Generator |
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{ |
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$step = 0; |
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while ($generator->valid()) { |
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try { |
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// yield new Promise |
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// yield [$promiseOne, $promiseTwo] |
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// yield new Signal |
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// yield new Signal => 'arg' |
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// yield new Signal => ['arg', 'two'] |
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// yield Signal::class => [new Signal, 'arg', 'two'] |
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// yield 'signal' |
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// yield 'signal' => 'arg' |
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// yield 'signal' => ['arg', 'two'] |
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// yield function () {...} |
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// yield function () {...} => ['arg', 'two'] |
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$current = $generator->current(); |
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$key = $generator->key(); |
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if ($key === $step) { |
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$interrupt = $current; |
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$arguments = []; |
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} else { |
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$interrupt = $key; |
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$arguments = \is_array($current) ? $current : [$current]; |
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$step--; |
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} |
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if (\is_callable($interrupt)) { |
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$result = $this->call($interrupt, $arguments); |
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} elseif (\is_array($interrupt) || $interrupt instanceof Promise) { |
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$result = yield $interrupt; |
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} elseif ($this->isKnownSignal($interrupt)) { |
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$result = yield $this->dispatch($interrupt, ...$arguments); |
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} else { |
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throw new Exception\InvalidYield($interrupt); |
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} |
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$generator->send($result); |
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} catch (\Throwable $error) { |
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$this->throw($generator, $error, $step); |
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} finally { |
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$step++; |
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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 \Generator $generator |
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* @param \Throwable $error |
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* @param int $step |
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* |
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* @return void |
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*/ |
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private function throw(\Generator $generator, \Throwable $error, int $step): void |
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{ |
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try { |
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$generator->throw($error); |
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} catch (\Throwable $error) { |
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throw new Exception\BadActionCall($step, $error); |
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} |
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} |
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private function isKnownSignal($interrupt) |
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{ |
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if (\is_object($interrupt)) { |
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$interrupt = \get_class($interrupt); |
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} |
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if (false === \is_string($interrupt)) { |
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return false; |
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} |
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return $this->handlers->has($interrupt); |
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} |
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} |
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phpinnacle /
ensign
This check looks for calls to methods that do not seem to exist on a given type. It looks for the method on the type itself as well as in inherited classes or implemented interfaces.
This is most likely a typographical error or the method has been renamed.