<?php
declare (strict_types=1);
namespace WordPress\AiClient\Tools\DTO;
use WordPress\AiClient\Common\AbstractDataTransferObject;
use WordPress\AiClient\Common\Exception\InvalidArgumentException;
/**
* Represents a function call request from an AI model.
*
* This DTO encapsulates information about a function that the AI model
* wants to invoke, including the function name and its arguments.
*
* @since 0.1.0
*
* @phpstan-type FunctionCallArrayShape array{id?: string, name?: string, args?: mixed}
*
* @extends AbstractDataTransferObject<FunctionCallArrayShape>
*/
class FunctionCall extends AbstractDataTransferObject
{
public const KEY_ID = 'id';
public const KEY_NAME = 'name';
public const KEY_ARGS = 'args';
/**
* @var string|null Unique identifier for this function call.
*/
private ?string $id;
/**
* @var string|null The name of the function to call.
*/
private ?string $name;
/**
* @var mixed The arguments to pass to the function.
*/
private $args;
/**
* Constructor.
*
* @since 0.1.0
*
* @param string|null $id Unique identifier for this function call.
* @param string|null $name The name of the function to call.
* @param mixed $args The arguments to pass to the function.
* @throws InvalidArgumentException If neither id nor name is provided.
*/
public function __construct(?string $id = null, ?string $name = null, $args = null)
{
if ($id === null && $name === null) {
throw new InvalidArgumentException('At least one of id or name must be provided.');
}
$this->id = $id;
$this->name = $name;
$this->args = $args;
}
/**
* Gets the function call ID.
*
* @since 0.1.0
*
* @return string|null The function call ID.
*/
public function getId(): ?string
{
return $this->id;
}
/**
* Gets the function name.
*
* @since 0.1.0
*
* @return string|null The function name.
*/
public function getName(): ?string
{
return $this->name;
}
/**
* Gets the function arguments.
*
* @since 0.1.0
*
* @return mixed The function arguments.
*/
public function getArgs()
{
return $this->args;
}
/**
* {@inheritDoc}
*
* @since 0.1.0
*/
public static function getJsonSchema(): array
{
return ['type' => 'object', 'properties' => [self::KEY_ID => ['type' => 'string', 'description' => 'Unique identifier for this function call.'], self::KEY_NAME => ['type' => 'string', 'description' => 'The name of the function to call.'], self::KEY_ARGS => ['type' => ['string', 'number', 'boolean', 'object', 'array', 'null'], 'description' => 'The arguments to pass to the function.']], 'anyOf' => [['required' => [self::KEY_ID]], ['required' => [self::KEY_NAME]]]];
}
/**
* {@inheritDoc}
*
* @since 0.1.0
*
* @return FunctionCallArrayShape
*/
public function toArray(): array
{
$data = [];
if ($this->id !== null) {
$data[self::KEY_ID] = $this->id;
}
if ($this->name !== null) {
$data[self::KEY_NAME] = $this->name;
}
if ($this->args !== null) {
$data[self::KEY_ARGS] = $this->args;
}
return $data;
}
/**
* {@inheritDoc}
*
* @since 0.1.0
*/
public static function fromArray(array $array): self
{
return new self($array[self::KEY_ID] ?? null, $array[self::KEY_NAME] ?? null, $array[self::KEY_ARGS] ?? null);
}
}