File Core/Schema/RequestMetaObject.php

1:	<?php
2:
3:	declare(strict_types=1);
4:
5:	/**
6:	* This file is part of the Nexus MCP SDK package.
7:	*
8:	* (c) 2026 John Paul E. Balandan, CPA <paulbalandan@gmail.com>
9:	*
10:	* For the full copyright and license information, please view
11:	* the LICENSE file that was distributed with this source code.
12:	*/
13:
14:	namespace Nexus\Mcp\Core\Schema;
15:
16:	use Nexus\Assert\Assert;
17:
18:	/**
19:	* The `_meta` extension slot carried by request params. Adds a typed `progressToken`
20:	* alongside open-ended extras.
21:	*
22:	* @implements Arrayable<array<string, mixed>>
23:	*
24:	* @see https://modelcontextprotocol.io/specification/2025-11-25/basic#_meta
25:	*/
26:	final readonly class RequestMetaObject implements Arrayable
27:	{
28:	/**
29:	* @param array<string, mixed> $extras
30:	*/
31:	public function __construct(public ?ProgressToken $progressToken = null, public array $extras = [])
32:	{
33:	}
34:
35:	#[\Override]
36:	public static function fromArray(array $data): static
37:	{
38:	$progressToken = null;
39:
40:	if (\array_key_exists('progressToken', $data)) {
41:	$raw = $data['progressToken'];
42:	Assert::that($raw)->isArrayKey('"_meta.progressToken" must be an int or string, {type} given.');
43:
44:	$progressToken = new ProgressToken($raw);
45:	unset($data['progressToken']);
46:	}
47:
48:	return new self($progressToken, $data);
49:	}
50:
51:	#[\Override]
52:	public function toArray(): array
53:	{
54:	$out = $this->extras;
55:
56:	if (null !== $this->progressToken) {
57:	$out['progressToken'] = $this->progressToken->token;
58:	}
59:
60:	return $out;
61:	}
62:
63:	#[\Override]
64:	public function jsonSerialize(): array\|\stdClass
65:	{
66:	$data = $this->toArray();
67:
68:	return [] === $data ? new \stdClass() : $data;
69:	}
70:	}
71:

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