File Core/Schema/Error.php | Nexus MCP SDK API

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:	use Nexus\Mcp\Core\Schema\Enum\ProtocolErrorCode;
18:
19:	/**
20:	* @implements Arrayable<array{
21:	* code: int,
22:	* message: non-empty-string,
23:	* data?: mixed
24:	* }>
25:	*
26:	* @see https://modelcontextprotocol.io/specification/2025-11-25/schema#error
27:	*/
28:	abstract readonly class Error implements Arrayable
29:	{
30:	public int $code;
31:
32:	/**
33:	* @var non-empty-string
34:	*/
35:	public string $message;
36:
37:	public function __construct(
38:	int\|ProtocolErrorCode $code,
39:	string $message,
40:	public mixed $data = null,
41:	) {
42:	Assert::that($message)->isNonEmptyString('error "message" must be a non-empty string.');
43:
44:	$this->code = $code instanceof ProtocolErrorCode ? $code->value : $code;
45:	$this->message = $message;
46:	}
47:
48:	#[\Override]
49:	public function toArray(): array
50:	{
51:	$result = [
52:	'code' => $this->code,
53:	'message' => $this->message,
54:	];
55:
56:	$data = $this->data ?? [];
57:
58:	if ([] !== $data) {
59:	$result['data'] = $data;
60:	}
61:
62:	return $result;
63:	}
64:
65:	#[\Override]
66:	public function jsonSerialize(): array
67:	{
68:	return $this->toArray();
69:	}
70:	}
71: