File Core/Schema/Result/EmptyResult.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\Result;
15:
16:	use Nexus\Assert\Assert;
17:	use Nexus\Mcp\Core\Schema\Arrayable;
18:	use Nexus\Mcp\Core\Schema\Enum\ResultType;
19:	use Nexus\Mcp\Core\Schema\MetaObject;
20:	use Nexus\Mcp\Core\Schema\Result;
21:
22:	/**
23:	* Common result fields.
24:	*
25:	* @extends Result<array{
26:	* _meta?: template-type<MetaObject, Arrayable, 'T'>,
27:	* resultType: non-empty-string,
28:	* }>
29:	*
30:	* @see https://modelcontextprotocol.io/specification/draft/schema#emptyresult
31:	*/
32:	final readonly class EmptyResult extends Result implements ClientResult, ServerResult
33:	{
34:	public function __construct(MetaObject $meta = new MetaObject())
35:	{
36:	parent::__construct(meta: $meta);
37:	}
38:
39:	#[\Override]
40:	public static function fromArray(array $data): static
41:	{
42:	$meta = new MetaObject();
43:
44:	if (\array_key_exists('_meta', $data)) {
45:	Assert::that($data['_meta'])
46:	->isArray('"result._meta" must be an object, {type} given.')
47:	->isMap('"result._meta" must be a string-keyed object.')
48:	;
49:	$meta = MetaObject::fromArray($data['_meta']);
50:	}
51:
52:	return new self(meta: $meta);
53:	}
54:
55:	#[\Override]
56:	public function toArray(): array
57:	{
58:	$data = [];
59:	$meta = $this->meta->toArray();
60:
61:	if ([] !== $meta) {
62:	$data['_meta'] = $meta;
63:	}
64:
65:	$data['resultType'] = self::getResultType();
66:
67:	return $data;
68:	}
69:
70:	#[\Override]
71:	protected function getResultType(): string
72:	{
73:	return ResultType::Complete->value;
74:	}
75:	}
76:

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