<?php
/**
 * This source file is part of the open source project
 * ExpressionEngine (https://expressionengine.com)
 *
 * @link      https://expressionengine.com/
 * @copyright Copyright (c) 2003-2022, Packet Tide, LLC (https://www.packettide.com)
 * @license   https://expressionengine.com/license Licensed under Apache License, Version 2.0
 */

namespace ExpressionEngine\Service\Validation\Rule;

use ExpressionEngine\Service\Validation\ValidationRule;

/**
 * Callback Validation Rule
 */
class Callback extends ValidationRule
{
    protected $callback = null;
    protected $last_error = '';

    public function __construct($callback)
    {
        $this->callback = $callback;
    }

    public function validate($key, $value)
    {
        $result = call_user_func($this->callback, $key, $value, $this->parameters, $this);

        if ($result !== true) {
            $this->last_error = $result;

            return false;
        }

        return true;
    }

    public function getLanguageKey()
    {
        return $this->last_error;
    }
}

// EOF
