<?php

/**
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; under version 2
 * of the License (non-upgradable).
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Copyright (c) 2020 (original work) Open Assessment Technologies SA;
 *
 * @author Sergei Mikhailov <sergei.mikhailov@taotesting.com>
 */
declare(strict_types=1);

namespace oat\taoQtiTest\models\runner\config\Business\Domain;

use IteratorAggregate;

class OptionCollection implements IteratorAggregate
{
    /** @var Option[] */
    private $options;

    public function __construct(Option ...$options)
    {
        $this->options = $options;
    }

    /**
     * @return Option[]
     */
    public function getIterator(): iterable
    {
        yield from $this->options;
    }

    public function filter(callable $callback): self
    {
        $resultingOptions = [];

        foreach ($this as $option) {
            if ($callback($option)) {
                $resultingOptions[] = $option;
            }
        }

        return new self(...$resultingOptions);
    }
}