<?php
namespace RocketTheme\Toolbox\ResourceLocator;

/**
 * Implements recursive iterator over filesystem.
 *
 * @package RocketTheme\Toolbox\ResourceLocator
 * @author RocketTheme
 * @license MIT
 */
class RecursiveUniformResourceIterator extends UniformResourceIterator implements \SeekableIterator, \RecursiveIterator
{
    protected $subPath;

    public function getChildren()
    {
        $subPath = $this->getSubPathName();

        return (new RecursiveUniformResourceIterator($this->getUrl(), $this->flags, $this->locator))->setSubPath($subPath);
    }

    public function hasChildren($allow_links = null)
    {
        $allow_links = (bool) ($allow_links !== null ? $allow_links : $this->flags & \FilesystemIterator::FOLLOW_SYMLINKS);

        return $this->iterator && $this->isDir() && !$this->isDot() && ($allow_links || !$this->isLink());
    }

    public function getSubPath()
    {
        return $this->subPath;
    }

    public function getSubPathName()
    {
        return ($this->subPath ? $this->subPath . '/' : '') . $this->getFilename();
    }

    /**
     * @param $path
     * @return $this
     * @internal
     */
    public function setSubPath($path)
    {
        $this->subPath = $path;

        return $this;
    }
}