streamconverter.php

<?php declare(strict_types = 1);
 
namespace Bitrix\Main\Localization;
 
use Bitrix\Main\Text\Encoding;
 
 
class StreamConverter extends \php_user_filter
{
    public const FILTER_IDENTIFIER = 'bx.localization.converter';
 
    protected $code = '';
 
    public function filter($in, $out, &$consumed, $closing): int
    {
        while ($bucket = stream_bucket_make_writeable($in))
        {
            $this->code .= $bucket->data;
            $consumed += $bucket->datalen;
        }
 
        if ($closing || feof($this->stream))
        {
            $params = explode('/', str_replace(self::FILTER_IDENTIFIER.'.', '', $this->filtername));
            $sourceEncoding = $params[0];
            $targetEncoding = $params[1];
 
            if ($sourceEncoding != $targetEncoding)
            {
                $this->code = Encoding::convertEncoding($this->code, $sourceEncoding, $targetEncoding);
            }
 
            $bucket = stream_bucket_new($this->stream, $this->code);
            stream_bucket_append($out, $bucket);
 
            return PSFS_PASS_ON;
        }
 
        return PSFS_FEED_ME;
    }
 
    public static function register(): bool
    {
        return stream_filter_register(
            self::FILTER_IDENTIFIER.'.*',
            self::class
        );
    }
 
    public static function include(string $langPath, string $lang, string $targetEncoding = '', string $sourceEncoding = '')
    {
        self::register();
 
        if (empty($targetEncoding) || empty($sourceEncoding))
        {
            $checkPath = Translation::convertLangPath($langPath, $lang);
 
            [, $checkTargetEncoding, $checkSourceEncoding] = Translation::getEncodings($lang, $checkPath);
            if (empty($targetEncoding))
            {
                $targetEncoding = $checkTargetEncoding;
            }
            if (empty($sourceEncoding))
            {
                $sourceEncoding = $checkSourceEncoding;
            }
        }
 
        return include (
            'php://filter/read='.self::FILTER_IDENTIFIER.
            ".{$sourceEncoding}%2F{$targetEncoding}".
            '/resource='.$langPath
        );
    }
}