File Core/Schema/Result/InitializeResult.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\Implementation;
18:	use Nexus\Mcp\Core\Schema\MetaObject;
19:	use Nexus\Mcp\Core\Schema\ProtocolVersion;
20:	use Nexus\Mcp\Core\Schema\Result;
21:	use Nexus\Mcp\Core\Schema\ServerCapabilities;
22:
23:	/**
24:	* After receiving an initialize request from the client, the server sends this response.
25:	*
26:	* @see https://modelcontextprotocol.io/specification/2025-11-25/schema#initializeresult
27:	*/
28:	final readonly class InitializeResult extends Result implements ServerResult
29:	{
30:	/**
31:	* @var null\|non-empty-string
32:	*/
33:	public ?string $instructions;
34:
35:	public function __construct(
36:	public ProtocolVersion $protocolVersion,
37:	public ServerCapabilities $capabilities,
38:	public Implementation $serverInfo,
39:	?string $instructions = null,
40:	MetaObject $meta = new MetaObject(),
41:	) {
42:	Assert::that($instructions)->nullOr()->isNonEmptyString('"result.instructions" must be a non-empty string or null.');
43:
44:	$this->instructions = $instructions;
45:
46:	parent::__construct($meta);
47:	}
48:
49:	#[\Override]
50:	public static function fromArray(array $data): static
51:	{
52:	Assert::that($data)->hasOffset('protocolVersion', '"result" missing the required "protocolVersion" key.');
53:	$protocolVersion = $data['protocolVersion'];
54:	Assert::that($protocolVersion)->isString('"result.protocolVersion" must be a string, {type} given.');
55:
56:	Assert::that($data)->hasOffset('capabilities', '"result" missing the required "capabilities" key.');
57:	Assert::that($data['capabilities'])
58:	->isArray('"result.capabilities" must be an object, {type} given.')
59:	->isMap('"result.capabilities" must be a string-keyed object.')
60:	;
61:
62:	Assert::that($data)->hasOffset('serverInfo', '"result" missing the required "serverInfo" key.');
63:	Assert::that($data['serverInfo'])
64:	->isArray('"result.serverInfo" must be an object, {type} given.')
65:	->isMap('"result.serverInfo" must be a string-keyed object.')
66:	;
67:
68:	$instructions = $data['instructions'] ?? null;
69:	Assert::that($instructions)->nullOr()->isString('"result.instructions" must be a string or null, {type} given.');
70:
71:	$meta = new MetaObject();
72:
73:	if (\array_key_exists('_meta', $data)) {
74:	Assert::that($data['_meta'])
75:	->isArray('"result._meta" must be an object, {type} given.')
76:	->isMap('"result._meta" must be a string-keyed object.')
77:	;
78:	$meta = MetaObject::fromArray($data['_meta']);
79:	}
80:
81:	return new self(
82:	new ProtocolVersion($protocolVersion),
83:	ServerCapabilities::fromArray($data['capabilities']),
84:	Implementation::fromArray($data['serverInfo']),
85:	$instructions,
86:	$meta,
87:	);
88:	}
89:
90:	#[\Override]
91:	public function toArray(): array
92:	{
93:	$data = [
94:	...parent::toArray(),
95:	'protocolVersion' => $this->protocolVersion->version,
96:	'capabilities' => $this->capabilities->toArray(),
97:	'serverInfo' => $this->serverInfo->toArray(),
98:	];
99:
100:	if (null !== $this->instructions) {
101:	$data['instructions'] = $this->instructions;
102:	}
103:
104:	return $data;
105:	}
106:
107:	#[\Override]
108:	public function jsonSerialize(): array
109:	{
110:	$data = [
111:	...parent::toArray(),
112:	'protocolVersion' => $this->protocolVersion->version,
113:	'capabilities' => $this->capabilities->jsonSerialize(),
114:	'serverInfo' => $this->serverInfo->jsonSerialize(),
115:	];
116:
117:	if (null !== $this->instructions) {
118:	$data['instructions'] = $this->instructions;
119:	}
120:
121:	return $data;
122:	}
123:	}
124:

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