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<?php
namespace Laminas\Mail\Header;
use function getmypid;
use function mt_rand;
use function php_uname;
use function preg_match;
use function sha1;
use function sprintf;
use function strtolower;
use function time;
use function trim;
class MessageId implements HeaderInterface
{
/** @var string */
protected $messageId;
/**
* @param string $headerLine
* @return static
*/
public static function fromString($headerLine)
{
[$name, $value] = GenericHeader::splitHeaderLine($headerLine);
$value = HeaderWrap::mimeDecodeValue($value);
// check to ensure proper header type for this factory
if (strtolower($name) !== 'message-id') {
throw new Exception\InvalidArgumentException('Invalid header line for Message-ID string');
}
$header = new static();
$header->setId($value);
return $header;
}
/**
* @return string
*/
public function getFieldName()
{
return 'Message-ID';
}
/**
* @inheritDoc
*/
public function getFieldValue($format = HeaderInterface::FORMAT_RAW)
{
return $this->messageId;
}
/**
* @param string $encoding
* @return self
*/
public function setEncoding($encoding)
{
// This header must be always in US-ASCII
return $this;
}
/**
* @return string
*/
public function getEncoding()
{
return 'ASCII';
}
/**
* @return string
*/
public function toString()
{
return 'Message-ID: ' . $this->getFieldValue();
}
/**
* Set the message id
*
* @param string|null $id
* @return MessageId
*/
public function setId($id = null)
{
if ($id === null) {
$id = $this->createMessageId();
} else {
$id = trim($id, '<>');
}
if (
! HeaderValue::isValid($id)
|| preg_match("/[\r\n]/", $id)
) {
throw new Exception\InvalidArgumentException('Invalid ID detected');
}
$this->messageId = sprintf('<%s>', $id);
return $this;
}
/**
* Retrieve the message id
*
* @return string
*/
public function getId()
{
return $this->messageId;
}
/**
* Creates the Message-ID
*
* @return string
*/
public function createMessageId()
{
$time = time();
if (isset($_SERVER['REMOTE_ADDR'])) {
$user = $_SERVER['REMOTE_ADDR'];
} else {
$user = getmypid();
}
$rand = mt_rand();
if (isset($_SERVER["SERVER_NAME"])) {
$hostName = $_SERVER["SERVER_NAME"];
} else {
$hostName = php_uname('n');
}
return sha1($time . $user . $rand) . '@' . $hostName;
}
}