File Core/Schema/Elicitation/UntitledSingleSelectEnumSchema.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\Elicitation;
15:
16:	use Nexus\Assert\Assert;
17:
18:	/**
19:	* Schema for single-selection enumeration without display titles for options.
20:	*
21:	* @implements SingleSelectEnumSchema<array{
22:	* type: 'string',
23:	* enum: list<non-empty-string>,
24:	* title?: non-empty-string,
25:	* description?: non-empty-string,
26:	* default?: string,
27:	* }>
28:	*
29:	* @see https://modelcontextprotocol.io/specification/2026-07-28/schema#untitledsingleselectenumschema
30:	*/
31:	final readonly class UntitledSingleSelectEnumSchema implements SingleSelectEnumSchema
32:	{
33:	public const string TYPE = 'string';
34:
35:	/**
36:	* @param list<non-empty-string> $enum
37:	* @param null\|non-empty-string $title
38:	* @param null\|non-empty-string $description
39:	*/
40:	public function __construct(
41:	public array $enum,
42:	public ?string $title = null,
43:	public ?string $description = null,
44:	public ?string $default = null,
45:	) {
46:	Assert::that($enum)
47:	->isList('untitled single select enum schema "enum" must be a list, non-list array given.')
48:	->values()->isNonEmptyString('each untitled single select enum schema "enum" must be a non-empty string.')
49:	;
50:	Assert::that($title)
51:	->nullOr()
52:	->isNonEmptyString('untitled single select enum schema "title" must be a non-empty string or null.')
53:	;
54:	Assert::that($description)
55:	->nullOr()
56:	->isNonEmptyString('untitled single select enum schema "description" must be a non-empty string or null.')
57:	;
58:	}
59:
60:	#[\Override]
61:	public static function fromArray(array $data): static
62:	{
63:	Assert::that($data)->hasOffset('type', 'untitled single select enum schema is missing the required "type" key.');
64:	$type = $data['type'];
65:	Assert::that($type)->isIdentical(self::TYPE, 'untitled single select enum schema "type" must be {other}, {value} given.');
66:
67:	Assert::that($data)->hasOffset('enum', 'untitled single select enum schema is missing the required "enum" key.');
68:	Assert::that($data['enum'])
69:	->isList('untitled single select enum schema "enum" must be a list, non-list array given.')
70:	->values()->isNonEmptyString('each untitled single select enum schema "enum" must be a non-empty string, {type} given.')
71:	;
72:	$enum = $data['enum'];
73:
74:	$title = $data['title'] ?? null;
75:	Assert::that($title)->nullOr()->isNonEmptyString('untitled single select enum schema "title" must be a non-empty string or null, {type} given.');
76:
77:	$description = $data['description'] ?? null;
78:	Assert::that($description)->nullOr()->isNonEmptyString('untitled single select enum schema "description" must be a non-empty string or null, {type} given.');
79:
80:	$default = $data['default'] ?? null;
81:	Assert::that($default)->nullOr()->isString('untitled single select enum schema "default" must be a string or null, {type} given.');
82:
83:	return new self(enum: $enum, title: $title, description: $description, default: $default);
84:	}
85:
86:	#[\Override]
87:	public function toArray(): array
88:	{
89:	$data = [
90:	'type' => self::TYPE,
91:	'enum' => $this->enum,
92:	];
93:
94:	if (null !== $this->title) {
95:	$data['title'] = $this->title;
96:	}
97:
98:	if (null !== $this->description) {
99:	$data['description'] = $this->description;
100:	}
101:
102:	if (null !== $this->default) {
103:	$data['default'] = $this->default;
104:	}
105:
106:	return $data;
107:	}
108:
109:	#[\Override]
110:	public function jsonSerialize(): array
111:	{
112:	return $this->toArray();
113:	}
114:	}
115:

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