/**
* Cache content and split in parts if multipart
*
* @throws Exception\RuntimeException
* @return null
*/
protected function _cacheContent()
{
// caching content if we can't fetch parts
if ($this->_content === null && $this->_mail) {
$this->_content = $this->_mail->getRawContent($this->_messageNum);
}
if (!$this->isMultipart()) {
return;
}
// split content in parts
$boundary = $this->getHeaderField('content-type', 'boundary');
if (!$boundary) {
throw new Exception\RuntimeException('no boundary found in content type to split message');
}
$parts = Mime\Decode::splitMessageStruct($this->_content, $boundary);
if ($parts === null) {
return;
}
$counter = 1;
foreach ($parts as $part) {
$this->_parts[$counter++] = new self(array('headers' => $part['header'], 'content' => $part['body']));
}
}
