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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)
{
$connection = \Bitrix\Main\Application::getConnection();
$helper = $connection->getSqlHelper();
$orValues = static::parseFulltextPhrase($phrase, $minTokenSize);
foreach ($orValues as $i => $andValues)
{
$orValues[$i] = '(' . $helper->getMatchAndExpression($andValues, $wildcard == '*') . ')';
}
return $helper->getMatchOrExpression($orValues);
}
public static function parseFulltextPhrase($phrase, $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[] = $andValues;
}
}
return $orValues;
}
/**
* @return int
*/
public static function getMinTokenSize()
{
static $ftMinTokenSize = null;
if($ftMinTokenSize === null)
{
$config = \Bitrix\Main\Application::getConnection()->getConfiguration();
$ftMinTokenSize = ($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)
{
//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);
return $values;
}
}