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<?php
/**
 *
 * This file is part of the phpBB Forum Software package.
 *
 * @copyright (c) phpBB Limited <https://www.phpbb.com>
 * @license GNU General Public License, version 2 (GPL-2.0)
 *
 * For full copyright and license information, please see
 * the docs/CREDITS.txt file.
 *
 */
namespace phpbb\di;
use Symfony\Component\DependencyInjection\ContainerInterface;
/**
 * Collection of services in a specified order
 */
class ordered_service_collection extends service_collection
{
    /**
     * @var bool
     */
    protected $is_ordered;
    /**
     * @var array
     */
    protected $service_ids;
    /**
     * Constructor
     *
     * @param ContainerInterface $container Container object
     */
    public function __construct(ContainerInterface $container)
    {
        $this->is_ordered = false;
        $this->service_ids = array();
        parent::__construct($container);
    }
    /**
     * {@inheritdoc}
     */
    public function getIterator()
    {
        if (!$this->is_ordered)
        {
            $this->sort_services();
        }
        return new service_collection_iterator($this);
    }
    /**
     * {@inheritdoc}
     */
    public function offsetExists($index)
    {
        if (!$this->is_ordered)
        {
            $this->sort_services();
        }
        return parent::offsetExists($index);
    }
    /**
     * {@inheritdoc}
     */
    public function offsetGet($index)
    {
        if (!$this->is_ordered)
        {
            $this->sort_services();
        }
        return parent::offsetGet($index);
    }
    /**
     * Adds a service ID to the collection
     *
     * @param string    $service_id
     * @param int        $order
     */
    public function add($service_id, $order = 0)
    {
        $order = (int) $order;
        $this->service_ids[$order][] = $service_id;
        $this->is_ordered = false;
    }
    protected function sort_services()
    {
        if ($this->is_ordered)
        {
            return;
        }
        $this->exchangeArray(array());
        ksort($this->service_ids);
        foreach ($this->service_ids as $service_order_group)
        {
            foreach ($service_order_group as $service_id)
            {
                $this->offsetSet($service_id, null);
            }
        }
        $this->is_ordered = true;
    }
}