/**
* Adds $part to the list of parts and returns the Content-ID of the part.
*
* @param ezcMailPart $part
* @return string
*/
public function addRelatedPart(ezcMailPart $part)
{
// it doesn't have a Content-ID, we must set one.
$contentId = '';
if ($part->getHeader('Content-ID') == '') {
if ($part instanceof ezcMailFile) {
$part->contentId = ezcMailTools::generateContentId(basename($part->fileName));
} else {
$part->setHeader('Content-ID', ezcMailTools::generateContentId('part'));
}
}
$contentId = trim($part->getHeader('Content-ID'), '<>');
// Set the content ID property of the ezcMailFile if one was found
if ($part instanceof ezcMailFile) {
$part->contentId = $contentId;
}
if (count($this->parts) > 0) {
$this->parts[] = $part;
} else {
$this->parts[1] = $part;
}
return $contentId;
}
