File Message/Message.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) 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\Message;
15:
16:	use Nexus\Mcp\Arrayable;
17:
18:	/**
19:	* A JSON-RPC message.
20:	*/
21:	abstract readonly class Message implements \JsonSerializable, Arrayable
22:	{
23:	final public const string JSON_RPC_VERSION = '2.0';
24:
25:	/**
26:	* @var non-empty-string
27:	*/
28:	public string $jsonrpc;
29:
30:	public function __construct(string $jsonrpc)
31:	{
32:	if ('' === $jsonrpc) {
33:	throw new \InvalidArgumentException('JSON-RPC version cannot be empty.');
34:	}
35:
36:	if (self::JSON_RPC_VERSION !== $jsonrpc) {
37:	throw new \InvalidArgumentException('Invalid JSON-RPC version.');
38:	}
39:
40:	$this->jsonrpc = $jsonrpc;
41:	}
42:
43:	/**
44:	* @return array<string, mixed>
45:	*/
46:	#[\Override]
47:	public function jsonSerialize(): array
48:	{
49:	return $this->toArray();
50:	}
51:	}
52: