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<?php
/**
* Bitrix Framework
* @package bitrix
* @subpackage main
* @copyright 2001-2018 Bitrix
*/
namespace Bitrix\Main\Mail;
/**
* Class Multipart
* @package Bitrix\Main\Mail
*/
class Multipart extends Part
{
const MIXED = 'multipart/mixed';
const ALTERNATIVE = 'multipart/alternative';
const RELATED = 'multipart/related';
/** @var Multipart[]|Part[] $parts Parts. */
protected $parts = [];
/** @var string $uniqueString Unique string. */
protected $uniqueString;
/** @var string $eol Symbol of end-of-line. */
protected $eol;
/**
* Multipart constructor.
*/
public function __construct()
{
parent::__construct();
$this->uniqueString = mb_substr(uniqid(mt_rand(100, 999)), 0, 10);
$this->setContentType(self::MIXED);
}
/**
* Set EOL.
*
* @param string $eol
* @return $this
*/
public function setEol($eol)
{
parent::setEol($eol);
foreach ($this->parts as $part)
{
$part->setEol($this->getEol());
}
return $this;
}
/**
* Set content type.
*
* @param string $type Type.
* @return $this
*/
public function setContentType($type)
{
$boundary = $this->getBoundary($type);
$this->addHeader('Content-Type', "$type; boundary=\"$boundary\"");
return $this;
}
/**
* Add part.
*
* @param Part $part Part.
* @return $this
*/
public function addPart(Part $part)
{
$part->setEol($this->getEol());
$this->parts[] = $part;
return $this;
}
/**
* Convert object to string.
*
* @return string
*/
public function toStringHeaders()
{
$count = count($this->parts);
if ($count === 0)
{
return '';
}
elseif ($count === 1)
{
return current($this->parts)->toStringHeaders();
}
return parent::toStringHeaders();
}
/**
* Convert object to string.
*
* @return string
*/
public function toStringBody()
{
$count = count($this->parts);
if ($count === 0)
{
return '';
}
elseif ($count === 1)
{
return current($this->parts)->toStringBody();
}
$result = '';
$boundary = $this->getBoundary();
foreach ($this->parts as $part)
{
$result .= '--' . $boundary . $this->eol;
$result .= (string) $part;
}
$result .= '--' . $boundary . '--' . $this->eol;
return $result;
}
/**
* Get part count.
*
* @return integer
*/
protected function getPartCount()
{
$count = 0;
foreach ($this->parts as $part)
{
if ($part instanceof Multipart)
{
$count += $part->getPartCount();
}
else
{
$count += 1;
}
}
return $count;
}
/**
* Get boundary.
*
* @param string $contentType Content type.
* @return integer
*/
protected function getBoundary($contentType = null)
{
$type = $contentType ?: $this->getHeader('Content-Type');
$type = explode(';', $type);
$type = $type[0];
switch ($type)
{
case self::MIXED:
$prefix = 'mix';
break;
case self::ALTERNATIVE:
$prefix = 'alt';
break;
default:
$prefix = '';
}
return '-------' . $prefix . $this->uniqueString;
}
}