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<?php declare(strict_types=1);
namespace GraphQL\Executor\Promise;
/**
* Provides a means for integration of async PHP platforms ([related docs](data-fetching.md#async-php)).
*/
interface PromiseAdapter
{
/**
* Is the value a promise or a deferred of the underlying platform?
*
* @param mixed $value
*
* @api
*/
public function isThenable($value): bool;
/**
* Converts thenable of the underlying platform into GraphQL\Executor\Promise\Promise instance.
*
* @param mixed $thenable
*
* @api
*/
public function convertThenable($thenable): Promise;
/**
* Accepts our Promise wrapper, extracts adopted promise out of it and executes actual `then` logic described
* in Promises/A+ specs. Then returns new wrapped instance of GraphQL\Executor\Promise\Promise.
*
* @api
*/
public function then(Promise $promise, callable $onFulfilled = null, callable $onRejected = null): Promise;
/**
* Creates a Promise from the given resolver callable.
*
* @param callable(callable $resolve, callable $reject): void $resolver
*
* @api
*/
public function create(callable $resolver): Promise;
/**
* Creates a fulfilled Promise for a value if the value is not a promise.
*
* @param mixed $value
*
* @api
*/
public function createFulfilled($value = null): Promise;
/**
* Creates a rejected promise for a reason if the reason is not a promise.
*
* If the provided reason is a promise, then it is returned as-is.
*
* @api
*/
public function createRejected(\Throwable $reason): Promise;
/**
* Given an iterable of promises (or values), returns a promise that is fulfilled when all the
* items in the iterable are fulfilled.
*
* @param iterable<Promise|mixed> $promisesOrValues
*
* @api
*/
public function all(iterable $promisesOrValues): Promise;
}