mailtools.php

См. документацию.

<?php
 
class CMailTools
{
    public  $aMatches = [];
    protected  $pcre_backtrack_limit = false;
    protected  $server_name = null;
    protected  $maxFileSize = 0;
 
    public static function IsEightBit($str)
    {
        $len = mb_strlen($str);
        for ($i = 0; $i < $len; $i++)
        {
            if (ord(mb_substr($str, $i, 1)) >> 7)
            {
                return true;
            }
        }
        return false;
    }
 
    public static function EncodeMimeString($text, $charset)
    {
        if (!CMailTools::IsEightBit($text))
        {
            return $text;
        }
 
        $maxl = intval((76 - mb_strlen($charset) + 7) * 0.4);
 
        $res = '';
        $eol = \Bitrix\Main\Mail\Mail::getMailEol();
        $len = mb_strlen($text);
        for ($i = 0; $i < $len; $i += $maxl)
        {
            if ($i > 0)
            {
                $res .= $eol . "\t";
            }
            $res .= '=?' . $charset . '?B?' . base64_encode(mb_substr($text, $i, $maxl)) . '?=';
        }
        return $res;
    }
 
    public static function EncodeSubject($text, $charset)
    {
        return '=?' . $charset . '?B?' . base64_encode($text) . '?=';
    }
 
    public static function EncodeHeaderFrom($text, $charset)
    {
        $i = strlen($text);
        while ($i > 0)
        {
            if (ord($text[$i - 1]) >> 7)
            {
                break;
            }
            $i--;
        }
        if ($i == 0)
        {
            return $text;
        }
        else
        {
            return '=?' . $charset . '?B?' . base64_encode(substr($text, 0, $i)) . '?=' . substr($text, $i);
        }
    }
 
    protected function __replace_img($matches)
    {
        $io = CBXVirtualIo::GetInstance();
        $src = $matches[3];
 
        if ($src == '')
        {
            return $matches[0];
        }
 
        if (array_key_exists($src, $this->aMatches))
        {
            $uid = $this->aMatches[$src]['ID'];
            return $matches[1] . $matches[2] . 'cid:' . $uid . $matches[4] . $matches[5];
        }
 
        $filePath = $io->GetPhysicalName($_SERVER['DOCUMENT_ROOT'] . $src);
        if (!file_exists($filePath))
        {
            return $matches[0];
        }
 
        if (
            $this->maxFileSize > 0
            && filesize($filePath) > $this->maxFileSize
        )
        {
            return $matches[0];
        }
 
        $image = new \Bitrix\Main\File\Image($filePath);
        $info = $image->getInfo();
        if (!$info)
        {
            return $matches[0];
        }
 
        if (function_exists('image_type_to_mime_type'))
        {
            $contentType = image_type_to_mime_type($info->getFormat());
        }
        else
        {
            $contentType = CMailTools::ImageTypeToMimeType($info->getFormat());
        }
 
        $uid = uniqid(md5($src));
 
        $this->aMatches[$src] = [
            'SRC' => $src,
            'PATH' => $filePath,
            'CONTENT_TYPE' => $contentType,
            'DEST' => bx_basename($src),
            'ID' => $uid,
        ];
 
        return $matches[1] . $matches[2] . 'cid:' . $uid . $matches[4] . $matches[5];
    }
 
    public function ReplaceHrefs($text)
    {
        if ($this->pcre_backtrack_limit === false)
        {
            $this->pcre_backtrack_limit = intval(ini_get('pcre.backtrack_limit'));
        }
        $text_len = strlen($text);
        $text_len++;
        if ($this->pcre_backtrack_limit < $text_len)
        {
            @ini_set('pcre.backtrack_limit', $text_len);
            $this->pcre_backtrack_limit = intval(ini_get('pcre.backtrack_limit'));
        }
 
        if (!isset($this->server_name))
        {
            $this->server_name = COption::GetOptionString('main', 'server_name', '');
        }
 
        if ($this->server_name != '')
        {
            $text = preg_replace(
                "/(<a\\s[^>]*?(?<=\\s)href\\s*=\\s*)([\"'])(\\/.*?)(\\2)(\\s.+?>|\\s*>)/is",
                "\\1\\2http://" . $this->server_name . "\\3\\4\\5",
                $text
            );
        }
 
        return $text;
    }
 
    public function ReplaceImages($text)
    {
        if ($this->pcre_backtrack_limit === false)
        {
            $this->pcre_backtrack_limit = intval(ini_get('pcre.backtrack_limit'));
        }
        $text_len = strlen($text);
        $text_len++;
        if ($this->pcre_backtrack_limit < $text_len)
        {
            @ini_set('pcre.backtrack_limit', $text_len);
            $this->pcre_backtrack_limit = intval(ini_get('pcre.backtrack_limit'));
        }
        $this->maxFileSize = intval(COption::GetOptionInt('subscribe', 'max_file_size'));
        $this->aMatches = [];
        $text = preg_replace_callback(
            "/(<img\\s[^>]*?(?<=\\s)src\\s*=\\s*)([\"']?)(.*?)(\\2)(\\s.+?>|\\s*>)/is",
            [$this, '__replace_img'],
            $text
        );
        $text = preg_replace_callback(
            "/(background-image\\s*:\\s*url\\s*\\()([\"']?)(.*?)(\\2)(\\s*\\);)/is",
            [$this, '__replace_img'],
            $text
        );
        $text = preg_replace_callback(
            "/(<td\\s[^>]*?(?<=\\s)background\\s*=\\s*)([\"']?)(.*?)(\\2)(\\s.+?>|\\s*>)/is",
            [$this, '__replace_img'],
            $text
        );
        $text = preg_replace_callback(
            "/(<table\\s[^>]*?(?<=\\s)background\\s*=\\s*)([\"']?)(.*?)(\\2)(\\s.+?>|\\s*>)/is",
            [$this, '__replace_img'],
            $text
        );
        return $text;
    }
 
    public static function ImageTypeToMimeType($type)
    {
        static $aTypes = [
            1 => 'image/gif',
            2 => 'image/jpeg',
            3 => 'image/png',
            4 => 'application/x-shockwave-flash',
            5 => 'image/psd',
            6 => 'image/bmp',
            7 => 'image/tiff',
            8 => 'image/tiff',
            9 => 'application/octet-stream',
            10 => 'image/jp2',
            11 => 'application/octet-stream',
            12 => 'application/octet-stream',
            13 => 'application/x-shockwave-flash',
            14 => 'image/iff',
            15 => 'image/vnd.wap.wbmp',
            16 => 'image/xbm',
        ];
        if (isset($aTypes[$type]))
        {
            return $aTypes[$type];
        }
        else
        {
            return 'application/octet-stream';
        }
    }
}