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<?php |
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declare(strict_types=1); |
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namespace GraphQL\Executor\Promise\Adapter; |
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use Amp\Deferred; |
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use Amp\Failure; |
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use Amp\Promise as AmpPromise; |
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use Amp\Success; |
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use GraphQL\Executor\Promise\Promise; |
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use GraphQL\Executor\Promise\PromiseAdapter; |
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use Throwable; |
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use function Amp\Promise\all; |
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use function array_replace; |
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class AmpPromiseAdapter implements PromiseAdapter |
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{ |
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/** |
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* @inheritdoc |
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*/ |
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public function isThenable($value) : bool |
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{ |
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return $value instanceof AmpPromise; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function convertThenable($thenable) : Promise |
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{ |
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return new Promise($thenable, $this); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function then(Promise $promise, ?callable $onFulfilled = null, ?callable $onRejected = null) : Promise |
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{ |
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$deferred = new Deferred(); |
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$onResolve = static function (?Throwable $reason, $value) use ($onFulfilled, $onRejected, $deferred) : void { |
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if ($reason === null && $onFulfilled !== null) { |
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self::resolveWithCallable($deferred, $onFulfilled, $value); |
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} elseif ($reason === null) { |
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$deferred->resolve($value); |
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} elseif ($onRejected !== null) { |
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self::resolveWithCallable($deferred, $onRejected, $reason); |
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} else { |
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$deferred->fail($reason); |
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} |
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}; |
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/** @var AmpPromise $adoptedPromise */ |
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$adoptedPromise = $promise->adoptedPromise; |
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$adoptedPromise->onResolve($onResolve); |
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return new Promise($deferred->promise(), $this); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function create(callable $resolver) : Promise |
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{ |
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$deferred = new Deferred(); |
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$resolver( |
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static function ($value) use ($deferred) : void { |
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$deferred->resolve($value); |
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}, |
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static function (Throwable $exception) use ($deferred) : void { |
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$deferred->fail($exception); |
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} |
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); |
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return new Promise($deferred->promise(), $this); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function createFulfilled($value = null) : Promise |
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{ |
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$promise = new Success($value); |
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return new Promise($promise, $this); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function createRejected($reason) : Promise |
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{ |
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$promise = new Failure($reason); |
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return new Promise($promise, $this); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function all(array $promisesOrValues) : Promise |
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{ |
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/** @var AmpPromise[] $promises */ |
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$promises = []; |
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foreach ($promisesOrValues as $key => $item) { |
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if ($item instanceof Promise) { |
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$promises[$key] = $item->adoptedPromise; |
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} elseif ($item instanceof AmpPromise) { |
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$promises[$key] = $item; |
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} |
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} |
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$deferred = new Deferred(); |
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$onResolve = static function (?Throwable $reason, ?array $values) use ($promisesOrValues, $deferred) : void { |
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if ($reason === null) { |
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$deferred->resolve(array_replace($promisesOrValues, $values)); |
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return; |
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} |
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$deferred->fail($reason); |
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}; |
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all($promises)->onResolve($onResolve); |
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return new Promise($deferred->promise(), $this); |
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} |
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private static function resolveWithCallable(Deferred $deferred, callable $callback, $argument) : void |
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{ |
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try { |
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$result = $callback($argument); |
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} catch (Throwable $exception) { |
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$deferred->fail($exception); |
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return; |
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} |
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if ($result instanceof Promise) { |
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$result = $result->adoptedPromise; |
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} |
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$deferred->resolve($result); |
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} |
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} |
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simPod /
graphql-php
