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<?
/**
* @access private
* @internal
*/
namespace Bitrix\Tasks\Util;
final class Filter
{
private $conditions = null;
const EQUALITY_LIKE = 1;
const EQUALITY_STRICT = 2;
const EQUALITY_REGEXP = 3;
public function __construct($conditions)
{
$this->conditions = static::parseConditions($conditions);
}
public function match($item)
{
if(!is_object($item) && !is_array($item))
{
return false; // filter can not be applied to the basic data type, only array and arrayaccess supported
}
foreach($this->conditions as $condition)
{
$field = $condition['F'];
$equality = $condition['E'];
$match = false; // item does not match the unknown condition
if($equality == static::EQUALITY_STRICT || $equality == static::EQUALITY_LIKE)
{
$match = $item[$field] == $condition['V'];
}
elseif($equality == static::EQUALITY_REGEXP)
{
$match = preg_match($condition['V'], $item[$field]);
}
if($condition['I'])
{
$match = !$match;
}
return $match;
}
return false;
}
public static function isA($object)
{
return is_a($object, get_called_class());
}
private static function parseConditions($conditions)
{
$parsed = array();
// todo: only one level supported currently
// todo: use parseFilter here like this:
/*
\Bitrix\Tasks\Internals\DataBase\Helper\Common::parseFilter()
*/
if(is_array($conditions))
{
foreach($conditions as $c => $v)
{
$inverse = false;
$equals = static::EQUALITY_LIKE;
$c = trim((string) $c);
// todo: make rich syntax here, currently only = and != supported
if($c[0] == '!')
{
$inverse = true;
$c = mb_substr($c, 1);
}
if($c[0] == '=')
{
$equals = static::EQUALITY_STRICT;
$c = mb_substr($c, 1);
}
elseif($c[0] == '~')
{
$equals = static::EQUALITY_REGEXP;
$c = mb_substr($c, 1);
}
if($c != '')
{
$parsed[] = array('I' => $inverse, 'E' => $equals, 'F' => $c, 'V' => $v);
}
}
}
return $parsed;
}
}