Callback.php

<?php


/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Symfony\Component\Validator\Constraints;

use Symfony\Component\Validator\Constraint;

/**
 * Defines custom validation rules through arbitrary callback methods.
 *
 * @author Bernhard Schussek <bschussek@gmail.com>
 */
class Callback extends Constraint {
    
    /**
     * @var string|callable
     */
    public $callback;
    
    /**
     * @param string|string[]|callable|array<string,mixed>|null $callback The callback definition
     * @param string[]|null                                     $groups
     */
    public function __construct(array|string|callable|null $callback = null, ?array $groups = null, mixed $payload = null, array $options = []) {
        // Invocation through attributes with an array parameter only
        if (\is_array($callback) && 1 === \count($callback) && isset($callback['value'])) {
            $callback = $callback['value'];
        }
        if (!\is_array($callback) || !isset($callback['callback']) && !isset($callback['groups']) && !isset($callback['payload'])) {
            $options['callback'] = $callback;
        }
        else {
            $options = array_merge($callback, $options);
        }
        parent::__construct($options, $groups, $payload);
    }
    public function getDefaultOption() : ?string {
        return 'callback';
    }
    public function getTargets() : string|array {
        return [
            self::CLASS_CONSTRAINT,
            self::PROPERTY_CONSTRAINT,
        ];
    }

}