RefUrlFactory.php

<?php
use Nette\Http\Request;

class RefUrlFactory extends Object
{

	/** @var \Nette\Http\Url */
	protected $fallbackUrl;

	/** @var \Nette\Http\Request */
	protected $httpRequest;


	/**
	 * @param Url $fallbackUrl
	 * @param Request $httpRequest
	 */
	public function __construct($fallbackUrl, Request $httpRequest)
	{
		$this->fallbackUrl = new \Nette\Http\Url($fallbackUrl);
		$this->httpRequest = $httpRequest;
	}


	/**
	 * @return \Nette\Http\Url|\Nette\Http\UrlScript
	 */
	public function create()
	{
		$url = $this->httpRequest->getUrl();
		if (!$url->getHost()) {
			$url = $this->fallbackUrl;
		}

		return $url;
	}
}