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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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final class TaskProcessor implements Processor |
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{ |
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/** |
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* @var ArgumentsResolver |
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*/ |
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private $resolver; |
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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 ArgumentsResolver $resolver |
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*/ |
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public function __construct(ArgumentsResolver $resolver = null) |
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{ |
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$this->resolver = $resolver ?: new Resolver\EmptyResolver(); |
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} |
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/** |
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* @param string $interrupt |
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* @param callable $interrupter |
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*/ |
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public function intercept(string $interrupt, callable $interrupter): void |
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{ |
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$this->interruptions[$interrupt] = $interrupter; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function execute(callable $callable, ...$arguments): Task |
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{ |
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$token = new TaskToken(); |
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$arguments = (new Arguments($arguments))->inject($this->resolver->resolve($callable)); |
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return new Task(new LazyPromise(function () use ($callable, $arguments, $token) { |
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$result = $callable(...$arguments); |
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return $result instanceof \Generator ? new Coroutine($this->recoil($result, $token)) : $result; |
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}), $token); |
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} |
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/** |
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* @param \Generator $generator |
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* @param TaskToken $token |
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* |
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* @return mixed |
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*/ |
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private function recoil(\Generator $generator, TaskToken $token) |
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{ |
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while ($generator->valid()) { |
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$token->guard(); |
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try { |
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$key = $generator->key(); |
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$current = $generator->current(); |
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$generator->send(yield $this->interrupt($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 $value |
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* |
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* @return mixed |
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*/ |
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private function interrupt($key, $value) |
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{ |
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if (isset($this->interruptions[$key])) { |
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$interceptor = $this->interruptions[$key]; |
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$value = \is_array($value) ? $value : [$value]; |
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$value = $interceptor(...$value); |
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} |
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return $value; |
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} |
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} |
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phpinnacle /
ensign
