/**
* Try to detect unique beacon hash
*
* @param Mzax_Bounce_Message $message
* @return Ambigous <string, boolean>|unknown|boolean
*/
public function detectBeaconHash(Mzax_Bounce_Message $message)
{
$beacon = $message->header('x-campaign-ref');
if ($beacon) {
return $beacon;
}
$content = $message->getContent();
if (preg_match(self::BOUNDARY_REGEX, $content, $matches)) {
return $matches[1];
}
if (preg_match(self::IMAGE_REGEX, $content, $matches)) {
return $matches[1];
}
return false;
}
