Deferred.php — WooCommerce 10.9.3

woocommerce / lib / packages / GraphQL / Deferred.php

woocommerce / lib / packages / GraphQL Last commit date

Deferred.php

58 lines

1	<?php declare(strict_types=1);
2
3	namespace Automattic\WooCommerce\Vendor\GraphQL;
4
5	use Automattic\WooCommerce\Vendor\GraphQL\Executor\Promise\Adapter\SyncPromise;
6	use Automattic\WooCommerce\Vendor\GraphQL\Executor\Promise\Adapter\SyncPromiseQueue;
7
8	/**
9	* User-facing promise class for deferred field resolution.
10	*
11	* @phpstan-type Executor callable(): mixed
12	*/
13	class Deferred extends SyncPromise
14	{
15	/**
16	* Executor for deferred promises.
17	*
18	* @var (callable(): mixed)\|null
19	*/
20	protected $executor;
21
22	/**
23	* Create a new Deferred promise and enqueue its execution.
24	*
25	* @api
26	*
27	* @param Executor $executor
28	*/
29	public function __construct(callable $executor)
30	{
31	$this->executor = $executor;
32
33	SyncPromiseQueue::enqueue(function (): void {
34	$executor = $this->executor;
35	assert($executor !== null, 'Always set in constructor, this callback runs only once.');
36	$this->executor = null;
37
38	try {
39	$this->resolve($executor());
40	} catch (\Throwable $e) {
41	$this->reject($e);
42	}
43	});
44	}
45
46	/**
47	* Alias for __construct.
48	*
49	* @param Executor $executor
50	*
51	* @deprecated TODO remove in next major version, use new Deferred() instead
52	*/
53	public static function create(callable $executor): self
54	{
55	return new self($executor);
56	}
57	}
58