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<?php
namespace Bitrix\Main\Web\DOM;
abstract class QueryEngine
{
const DIR_DOWN = 0;
const DIR_UP = 1;
const FILTER_NODE_TYPE = 'nodeType';
const FILTER_NODE_NAME = 'nodeName';
const FILTER_ATTR = 'attr';
const FILTER_ATTR_VALUE = 'attrValue';
const FILTER_ATTR_CLASS_NAME = 'attrClassName';
const FILTER_OPERATION_EQUAL = '=';
const FILTER_OPERATION_NOT_EQUAL = '!';
const FILTER_OPERATION_START = '^';
const FILTER_OPERATION_END = '$';
const FILTER_OPERATION_CONTAIN = '*';
const FILTER_OPERATION_CONTAIN_WORD = '|';
protected $limit = null;
protected $deep = true;
protected $direction = self::DIR_DOWN;
private static $querySelectorEngine;
public static function getQuerySelectorEngine()
{
if (self::$querySelectorEngine == null)
{
self::$querySelectorEngine = new QuerySelectorEngine();
}
return self::$querySelectorEngine;
}
protected function isNodeFiltered(Node $node, array $filter)
{
$isFiltered = false;
foreach($filter as $filterItem)
{
foreach($filterItem as $type => $value)
{
switch($type)
{
case self::FILTER_NODE_TYPE:
if (!is_array($value))
{
$value = array($value);
}
foreach($value as $nodeType)
{
if(!$node->getNodeType() === $nodeType)
{
return false;
}
else
{
$isFiltered = true;
}
}
break;
case self::FILTER_NODE_NAME:
if(mb_strtoupper($value) === $node->getNodeName())
{
$isFiltered = true;
}
else
{
return false;
}
break;
case self::FILTER_ATTR:
if(!$node->hasAttributes())
{
$isFiltered = false;
}
else
{
if (!is_array($value))
{
$value = array($value);
}
foreach($value as $attrName)
{
/* @var $node Element*/
if($node->getAttribute($attrName) === null)
{
return false;
}
else
{
$isFiltered = true;
}
}
}
break;
case self::FILTER_ATTR_VALUE:
if(!$node->hasAttributes())
{
$isFiltered = false;
}
else
{
foreach($value as $attr)
{
$attrValue = $node->getAttribute($attr['name']);
if(!$attrValue)
{
continue;
}
$operationValue = $attr['value'];
switch($attr['operation'])
{
case self::FILTER_OPERATION_NOT_EQUAL:
if($attrValue === $operationValue)
{
return false;
}
break;
case self::FILTER_OPERATION_CONTAIN:
if(mb_strpos($attrValue, $operationValue) === false)
{
return false;
}
break;
case self::FILTER_OPERATION_END:
if(mb_substr($attrValue, -mb_strlen($operationValue)) !== $operationValue)
{
return false;
}
break;
case self::FILTER_OPERATION_START:
if(mb_strpos($attrValue, $operationValue) !== 0)
{
return false;
}
break;
case self::FILTER_OPERATION_CONTAIN_WORD:
throw new DomException('Not supported query filter: FILTER_OPERATION_CONTAIN_WORD');
break;
case self::FILTER_OPERATION_EQUAL:
default:
if($attrValue !== $operationValue)
{
return false;
}
}
$isFiltered = true;
}
}
break;
case self::FILTER_ATTR_CLASS_NAME:
if(!$node->hasAttributes())
{
$isFiltered = false;
}
else
{
if (!is_array($value))
{
$value = array($value);
}
foreach($value as $className)
{
if(!in_array($className, $node->getClassList()))
{
return false;
}
else
{
$isFiltered = true;
}
}
}
break;
}
}
}
return $isFiltered;
}
public function walk(array $filter = null, callable $callback = null, Node $node, $limit = 0, $direction = self::DIR_DOWN)
{
if($limit > 0)
{
$this->limit = $limit;
}
else
{
$this->limit = null;
}
$this->deep = true;
$this->direction = $direction;
return $this->walkInternal($filter, $callback, $node, $callback, $direction);
}
protected function walkInternal(array $filter = null, callable $callback = null, Node $node)
{
$resultList = array();
if($node->hasChildNodes())
{
foreach($node->getChildNodesArray() as $childNode)
{
if($callback)
{
$flag = call_user_func_array($callback, array($childNode, $filter));
}
elseif($filter)
{
$flag = $this->isNodeFiltered($childNode, $filter);
}
else
{
break;
}
if($flag === true)
{
// save node to result list
$resultList[] = $childNode;
// check limit of results
if($this->limit !== null)
{
--$this->limit;
if($this->limit <= 0)
{
break;
}
}
// check search only in child list
if(!$this->deep)
{
continue;
}
}
$resultList = array_merge(
$resultList,
$this->walkInternal($filter, $callback, $childNode, $callback)
);
}
}
return $resultList;
}
abstract public function query($queryString = "", Node $node, $limit = 0, $direction = self::DIR_DOWN);
}