File Core/Schema/ContentBlock/TextContent.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\ContentBlock;
15:
16:	use Nexus\Assert\Assert;
17:	use Nexus\Mcp\Core\Schema\Annotations;
18:	use Nexus\Mcp\Core\Schema\Arrayable;
19:	use Nexus\Mcp\Core\Schema\ContentBlock;
20:	use Nexus\Mcp\Core\Schema\MetaObject;
21:
22:	/**
23:	* Text provided to or from an LLM.
24:	*
25:	* @implements Arrayable<array{
26:	* text: string,
27:	* type: 'text',
28:	* annotations?: template-type<Annotations, Arrayable, 'T'>,
29:	* _meta?: template-type<MetaObject, Arrayable, 'T'>,
30:	* }>
31:	*
32:	* @see https://modelcontextprotocol.io/specification/draft/schema#textcontent
33:	*/
34:	final readonly class TextContent implements Arrayable, ContentBlock
35:	{
36:	public const string TYPE = 'text';
37:
38:	public function __construct(
39:	public string $text,
40:	public Annotations $annotations = new Annotations(),
41:	public MetaObject $meta = new MetaObject(),
42:	) {
43:	}
44:
45:	#[\Override]
46:	public static function fromArray(array $data): static
47:	{
48:	Assert::that($data)->hasOffset('type', 'text content is missing the required "type" key.');
49:	$type = $data['type'];
50:	Assert::that($type)->isIdentical(self::TYPE, 'text content "type" must be {other}, {value} given.');
51:
52:	Assert::that($data)->hasOffset('text', 'text content is missing the required "text" key.');
53:	$text = $data['text'];
54:	Assert::that($text)->isString('text content "text" must be a string, {type} given.');
55:
56:	$annotations = new Annotations();
57:
58:	if (\array_key_exists('annotations', $data)) {
59:	Assert::that($data['annotations'])
60:	->isArray('text content "annotations" must be an object, {type} given.')
61:	->isMap('text content "annotations" must be a string-keyed object.')
62:	;
63:	$annotations = Annotations::fromArray($data['annotations']);
64:	}
65:
66:	$meta = new MetaObject();
67:
68:	if (\array_key_exists('_meta', $data)) {
69:	Assert::that($data['_meta'])
70:	->isArray('text content "_meta" must be an object, {type} given.')
71:	->isMap('text content "_meta" must be a string-keyed object.')
72:	;
73:	$meta = MetaObject::fromArray($data['_meta']);
74:	}
75:
76:	return new self(text: $text, annotations: $annotations, meta: $meta);
77:	}
78:
79:	#[\Override]
80:	public function toArray(): array
81:	{
82:	$data = [
83:	'text' => $this->text,
84:	'type' => self::TYPE,
85:	];
86:
87:	$annotations = $this->annotations->toArray();
88:
89:	if ([] !== $annotations) {
90:	$data['annotations'] = $annotations;
91:	}
92:
93:	$meta = $this->meta->toArray();
94:
95:	if ([] !== $meta) {
96:	$data['_meta'] = $meta;
97:	}
98:
99:	return $data;
100:	}
101:
102:	#[\Override]
103:	public function jsonSerialize(): array
104:	{
105:	return $this->toArray();
106:	}
107:	}
108:

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