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: /**
17: * Common params for any notification.
18: *
19: * @implements Arrayable<array{_meta?: template-type<MetaObject, Arrayable, 'T'>, ...<string, mixed>}>
20: *
21: * @see https://github.com/modelcontextprotocol/modelcontextprotocol/blob/main/schema/2025-11-25/schema.ts
22: */
23: abstract readonly class NotificationParams implements Arrayable
24: {
25: public function __construct(public MetaObject $meta = new MetaObject())
26: {
27: }
28:
29: /**
30: * @param array<string, mixed> $data
31: */
32: #[\Override]
33: abstract public static function fromArray(array $data): static;
34:
35: /**
36: * Serializes the params body. Subclasses override to merge their own fields
37: * alongside the `_meta` slice returned here.
38: */
39: #[\Override]
40: public function toArray(): array
41: {
42: $meta = $this->meta->toArray();
43:
44: return [] === $meta ? [] : ['_meta' => $meta];
45: }
46:
47: #[\Override]
48: public function jsonSerialize(): array
49: {
50: return $this->toArray();
51: }
52: }
53: