<? require($_SERVER["DOCUMENT_ROOT"]."/bitrix/modules/seo/admin/seo_sitemap_run.php");

// Сущность с приоритетами

/**
 * Class SitemapPriorityTable
 * 
 * Fields:
 * <ul>
 * <li> ID int mandatory
 * <li> UF_REGEXP string optional
 * <li> UF_PRIORITY double optional
 * <li> UF_SORT double optional
 * </ul>
 *
 **/

class SitemapPriorityTable extends \Bitrix\Main\Entity\DataManager
{
	/**
	 * Returns DB table name for entity.
	 *
	 * @return string
	 */
	public static function getTableName()
	{
		return 'sitemap_priority';
	}

	/**
	 * Returns entity map definition.
	 *
	 * @return array
	 */
	public static function getMap()
	{
		return array(
			'ID' => array(
				'data_type' => 'integer',
				'primary' => true,
				'autocomplete' => true,
				'title' => 'ID',
			),
			'UF_REGEXP' => array(
				'data_type' => 'text',
				'title' => 'Регулярное выражение',
			),
			'UF_PRIORITY' => array(
				'data_type' => 'float',
				'title' => 'Приоритет',
			),
			'UF_SORT' => array(
				'data_type' => 'float',
				'title' => 'Сортировка',
			),
		);
	}

	/** Возвращает все записи таблицы, отсортированные по полю SORT **/
	public static function getArray(){
		$ob = self::getList(array(
			'select' => array('REGEXP' => 'UF_REGEXP', 'PRIORITY' => 'UF_PRIORITY', 'SORT' => 'UF_SORT'),
			'order' => array('UF_SORT' => 'asc')
		));

		$arPriority = array();

		while($ar = $ob->fetch()){
			$arPriority[] = $ar;
		}
		return $arPriority;
	}
}

// Обработчик

class SitemapPriority {
	private $priority;

	public function __construct(){
		$this->priority = SitemapPriorityTable::getArray();
	}

	public function getIncludedFiles(){
		$xml = simplexml_load_file($_SERVER["DOCUMENT_ROOT"].'/sitemap.xml');
		$arFiles = array();

		// Get Files to Process
		foreach ($xml->sitemap as $file) {
			$filename = parse_url((string) $file->loc);
			$arFiles[] = $filename['path'];
		}
		return $arFiles;
	}

	public function getPriority($url){
		foreach ($this->priority as $p) {
			if(preg_match('|'.$p['REGEXP'].'|', $url)){
				return $p['PRIORITY'];
			}
		}
		return 0;
	}

	private function deleteIncludedFile($filename){
		unlink($_SERVER["DOCUMENT_ROOT"].$filename);
	}

	public function parse(){
		$arFiles = $this->getIncludedFiles();

		$res = new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8"?><urlset></urlset>');
		$res->addAttribute('xmlns', "http://www.sitemaps.org/schemas/sitemap/0.9");

		foreach ($arFiles as $filename) {
			$xml = simplexml_load_file($_SERVER["DOCUMENT_ROOT"].$filename);
			foreach ($xml->url as $url) {
				$u = $res->AddChild('url');
				$u->AddChild('loc', (string) $url->loc);
				$u->AddChild('lastmod', (string) $url->lastmod);
				$parsedUrl = parse_url((string) $url->loc);
				$u->AddChild('priority', $this->getPriority($parsedUrl['path']));
			}
			$this->deleteIncludedFile($filename);
		}

		$res->asXML($_SERVER["DOCUMENT_ROOT"].'/sitemap.xml');
	}
}

// Срабатывает на последнем шаге генерации карты:

if($_REQUEST['action'] == 'sitemap_run' && check_bitrix_sessid() && $v >= $arValueSteps['index']){
	$parser = new SitemapPriority();
	$parser->parse();
}