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<?php
/**
* Bitrix Framework
* @package bitrix
* @subpackage main
* @copyright 2001-2017 Bitrix
*/
namespace Bitrix\Main\ORM\Query\Filter;
use Bitrix\Main\Text;
/**
* Filter helper for specific values preparation.
*
* @package bitrix
* @subpackage main
*/
class Helper
{
const FT_MIN_TOKEN_SIZE = 3;
/**
* Places + and * for each word in a phrase.
*
* @param string $phrase
* @param string $wildcard '*' or '' actually
* @param int|null $minTokenSize
*
* @return string
*/
public static function matchAgainstWildcard($phrase, $wildcard = '*', $minTokenSize = null)
{
$ftMinTokenSize = $minTokenSize ?: static::getMinTokenSize();
$orValues = array();
//split to words by any non-word symbols
$andValues = static::splitWords($phrase);
if(!empty($andValues))
{
$andValues = array_filter(
$andValues,
function($val) use ($ftMinTokenSize)
{
return (mb_strlen($val) >= $ftMinTokenSize);
}
);
if(!empty($andValues))
{
$orValues[] = "+".implode($wildcard." +", $andValues).$wildcard;
}
}
if(!empty($orValues))
{
return "(".implode(") (", $orValues).")";
}
return '';
}
/**
* @return int
*/
public static function getMinTokenSize()
{
static $ftMinTokenSize = null;
if($ftMinTokenSize === null)
{
$config = \Bitrix\Main\Application::getConnection()->getConfiguration();
$ftMinTokenSize = (isset($config["ft_min_token_size"])? $config["ft_min_token_size"] : self::FT_MIN_TOKEN_SIZE);
}
return $ftMinTokenSize;
}
/**
* Splits a string to words by any non-word symbols.
* @param $string
* @return array
*/
public static function splitWords($string)
{
static $encoding = null;
if($encoding === null)
{
$encoding = strtolower(\Bitrix\Main\Context::getCurrent()->getCulture()->getCharset());
}
if($encoding <> "utf-8")
{
$string = Text\Encoding::convertEncoding($string, $encoding, "UTF-8");
}
else
{
//mysql [1064] syntax error, unexpected $end
$string = Text\UtfSafeString::escapeInvalidUtf($string);
}
//split to words by any non-word symbols
$values = preg_split("/[^\\p{L}\\d_]/u", $string);
$values = array_filter(
$values,
function($val)
{
return ($val <> '');
}
);
$values = array_unique($values);
if($encoding <> "utf-8")
{
$values = Text\Encoding::convertEncoding($values, "UTF-8", $encoding);
}
return $values;
}
}