File Server/Message/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) 2025 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\Server\Message\Result;
15:
16:	use Nexus\Mcp\Implementation;
17:	use Nexus\Mcp\Message\Result;
18:	use Nexus\Mcp\ProtocolVersion;
19:	use Nexus\Mcp\Server\ServerCapabilities;
20:
21:	/**
22:	* After receiving an initialize request from the client, the server sends this response.
23:	*/
24:	final readonly class InitializeResult extends Result implements ServerResult
25:	{
26:	/**
27:	* @param null\|non-empty-string $instructions Instructions describing how to use the server and its features
28:	* @param null\|array<string, mixed> $meta Reserved by MCP to allow clients and servers to attach
29:	* additional metadata to their interactions.
30:	*/
31:	public function __construct(
32:	public ProtocolVersion $protocolVersion,
33:	public ServerCapabilities $capabilities,
34:	public Implementation $serverInfo,
35:	public ?string $instructions = null,
36:	public ?array $meta = null,
37:	) {}
38:
39:	/**
40:	* @return array{
41:	* _meta?: array<string, mixed>,
42:	* capabilities: array<string, mixed>,
43:	* instructions?: string,
44:	* protocolVersion: string,
45:	* serverInfo: array{name: non-empty-string, version: non-empty-string, title?: non-empty-string},
46:	* }
47:	*/
48:	#[\Override]
49:	public function toArray(): array
50:	{
51:	return array_filter([
52:	'_meta' => $this->meta,
53:	'capabilities' => $this->capabilities->toArray(),
54:	'instructions' => $this->instructions,
55:	'protocolVersion' => $this->protocolVersion->__toString(),
56:	'serverInfo' => $this->serverInfo->toArray(),
57:	], static fn(mixed $value): bool => null !== $value);
58:	}
59:
60:	/**
61:	* @return array{
62:	* _meta?: array<string, mixed>,
63:	* capabilities: array<string, mixed>,
64:	* instructions?: string,
65:	* protocolVersion: string,
66:	* serverInfo: array{name: non-empty-string, version: non-empty-string, title?: non-empty-string},
67:	* }
68:	*/
69:	#[\Override]
70:	public function jsonSerialize(): array
71:	{
72:	return $this->toArray();
73:	}
74:	}
75:

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