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<?php
namespace Bitrix\Mail\Imap;
/**
* https://tools.ietf.org/html/rfc3501#section-7.4.2
*
* multipart:
* - parts array
* - subtype
* + params array
* + disposition array
* + language
* + location
*
* basic:
* - type
* - subtype
* - params array
* - content id
* - description
* - encoding
* - size
* + body MD5
* + disposition array
* + language
* + location
*
* text:
* - type
* - subtype
* - params array
* - content id
* - description
* - encoding
* - size
* - size in text lines
* + body MD5
* + disposition array
* + language
* + location
*
* message/rfc822:
* - type
* - subtype
* - params array
* - content id
* - description
* - encoding
* - size
* - envelope structure
* - body structure
* - size in text lines
* + body MD5
* + disposition array
* + language
* + location
*/
class BodyStructure
{
protected $number;
protected $data = array();
protected $isMultipart = false, $partsCount = 0;
public function __construct(array $bodystructure, $number = null)
{
$this->number = $number;
$this->data = &$bodystructure;
if (is_array($bodystructure[0]))
{
$this->isMultipart = true;
$this->partsCount = count($bodystructure[0]);
for ($i = 0; $i < $this->partsCount; $i++)
{
$bodystructure[0][$i] = new static(
$bodystructure[0][$i],
(string) (!is_null($number) ? sprintf('%s.%u', $number, $i + 1) : $i + 1)
);
}
}
else
{
if (is_null($number))
{
$this->number = 1;
}
$bodystructure[0] = strtolower($bodystructure[0]);
$bodystructure[5] = strtolower($bodystructure[5]);
}
$bodystructure[1] = strtolower($bodystructure[1]);
if (!empty($bodystructure[2]) && is_array($bodystructure[2]))
{
$params = array();
$count = count($bodystructure[2]);
for ($i = 0; $i < $count; $i += 2)
{
$params[strtolower($bodystructure[2][$i])] = $bodystructure[2][$i + 1];
}
$bodystructure[2] = $params;
}
$disposition = &$bodystructure[$this->getDispositionIndex()];
$disposition[0] = strtolower($disposition[0]);
if (!empty($disposition[1]) && is_array($disposition[1]))
{
$params = array();
$count = count($disposition[1]);
for ($i = 0; $i < $count; $i += 2)
{
$params[strtolower($disposition[1][$i])] = $disposition[1][$i + 1];
}
$disposition[1] = $params;
}
}
public function getNumber()
{
return $this->number;
}
public function getType()
{
return ($this->isMultipart ? 'multipart' : $this->data[0]);
}
public function getSubtype()
{
return $this->data[1];
}
public function getParams()
{
return $this->data[2];
}
public function getId()
{
return $this->isMultipart ? false : $this->data[3];
}
public function getEncoding()
{
return ($this->isMultipart ? false : $this->data[5]);
}
protected function getDispositionIndex()
{
switch ($this->getType())
{
case 'multipart':
return 3;
case 'message':
return 'rfc822' === $this->getSubtype() ? 11 : 8;
case 'text':
return 9;
default:
return 8;
}
}
public function getDisposition()
{
return $this->data[$this->getDispositionIndex()];
}
public function isMultipart()
{
return $this->isMultipart;
}
public function isText()
{
return $this->getType() === 'text';
}
public function isAttachment()
{
return $this->getDisposition()[0] === 'attachment';
}
public function traverse(callable $callback, $flat = false)
{
$items = array();
if ($this->isMultipart)
{
for ($i = 0; $i < $this->partsCount; $i++)
{
$items[] = $this->data[0][$i]->traverse($callback, $flat);
}
}
$result = array($callback($this, $items));
if ($flat)
{
$result = array_merge($result, ...$items);
}
else
{
$result[] = $items;
}
return $result;
}
}