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<?php
namespace Laminas\Mail\Header;
use Laminas\Mail\Address;
use Laminas\Mail\AddressList;
use Laminas\Mail\Headers;
use Laminas\Mail\Storage\Exception\RuntimeException;
use function array_filter;
use function array_map;
use function assert;
use function idn_to_ascii;
use function implode;
use function in_array;
use function is_array;
use function is_string;
use function preg_match;
use function preg_match_all;
use function preg_replace;
use function sprintf;
use function str_contains;
use function str_replace;
use function strtolower;
use function trim;
use const IDNA_DEFAULT;
use const IDNA_ERROR_BIDI;
use const IDNA_ERROR_CONTEXTJ;
use const IDNA_ERROR_DISALLOWED;
use const IDNA_ERROR_DOMAIN_NAME_TOO_LONG;
use const IDNA_ERROR_EMPTY_LABEL;
use const IDNA_ERROR_HYPHEN_3_4;
use const IDNA_ERROR_INVALID_ACE_LABEL;
use const IDNA_ERROR_LABEL_HAS_DOT;
use const IDNA_ERROR_LABEL_TOO_LONG;
use const IDNA_ERROR_LEADING_COMBINING_MARK;
use const IDNA_ERROR_LEADING_HYPHEN;
use const IDNA_ERROR_PUNYCODE;
use const IDNA_ERROR_TRAILING_HYPHEN;
use const INTL_IDNA_VARIANT_UTS46;
/**
* Base class for headers composing address lists (to, from, cc, bcc, reply-to)
*/
abstract class AbstractAddressList implements HeaderInterface
{
private const IDNA_ERROR_MAP = [
IDNA_ERROR_EMPTY_LABEL => 'empty label',
IDNA_ERROR_LABEL_TOO_LONG => 'label too long',
IDNA_ERROR_DOMAIN_NAME_TOO_LONG => 'domain name too long',
IDNA_ERROR_LEADING_HYPHEN => 'leading hyphen',
IDNA_ERROR_TRAILING_HYPHEN => 'trailing hyphen',
IDNA_ERROR_HYPHEN_3_4 => 'consecutive hyphens',
IDNA_ERROR_LEADING_COMBINING_MARK => 'leading combining mark',
IDNA_ERROR_DISALLOWED => 'disallowed',
IDNA_ERROR_PUNYCODE => 'invalid punycode encoding',
IDNA_ERROR_LABEL_HAS_DOT => 'has dot',
IDNA_ERROR_INVALID_ACE_LABEL => 'label not in ASCII encoding',
IDNA_ERROR_BIDI => 'fails bidirectional criteria',
IDNA_ERROR_CONTEXTJ => 'one or more characters fail CONTEXTJ rule',
];
/** @var AddressList */
protected $addressList;
/** @var string Normalized field name */
protected $fieldName;
/**
* Header encoding
*
* @var string
*/
protected $encoding = 'ASCII';
/** @var string lower case field name */
protected static $type;
/** @var string[] lower case aliases for the field name */
protected static $typeAliases = [];
/**
* @param string $headerLine
* @return static
*/
public static function fromString($headerLine)
{
[$fieldName, $fieldValue] = GenericHeader::splitHeaderLine($headerLine);
if ((strtolower($fieldName) !== static::$type) && ! in_array(strtolower($fieldName), static::$typeAliases)) {
throw new Exception\InvalidArgumentException(sprintf(
'Invalid header line for "%s" string',
self::class
));
}
// split value on ","
$fieldValue = str_replace(Headers::FOLDING, ' ', $fieldValue);
$fieldValue = preg_replace('/[^:]+:([^;]*);/', '$1,', $fieldValue);
$values = ListParser::parse($fieldValue);
$wasEncoded = false;
$addresses = array_map(
static function ($value) use (&$wasEncoded): ?Address {
$decodedValue = HeaderWrap::mimeDecodeValue($value);
$wasEncoded = $wasEncoded || ($decodedValue !== $value);
$value = trim($decodedValue);
$comments = self::getComments($value);
$value = self::stripComments($value);
$value = preg_replace(
[
'#(?<!\\\)"(.*)(?<!\\\)"#', // quoted-text
'#\\\([\x01-\x09\x0b\x0c\x0e-\x7f])#', // quoted-pair
],
[
'\\1',
'\\1',
],
$value
);
return empty($value) ? null : Address::fromString($value, $comments);
},
$values
);
$addresses = array_filter($addresses);
$header = new static();
if ($wasEncoded) {
$header->setEncoding('UTF-8');
}
/** @var AddressList $addressList */
$addressList = $header->getAddressList();
foreach ($addresses as $address) {
$addressList->add($address);
}
return $header;
}
/**
* @return string
*/
public function getFieldName()
{
return $this->fieldName;
}
/**
* Safely convert UTF-8 encoded domain name to ASCII
*
* @param string $domainName the UTF-8 encoded email
*/
protected function idnToAscii($domainName): string
{
/** @psalm-var string|false $ascii */
$ascii = idn_to_ascii($domainName, IDNA_DEFAULT, INTL_IDNA_VARIANT_UTS46, $conversionInfo);
if (is_string($ascii)) {
return $ascii;
}
$messages = [];
assert(is_array($conversionInfo));
/* @psalm-var array{errors: numeric-string} $conversionInfo */
$errors = (int) $conversionInfo['errors'];
foreach (self::IDNA_ERROR_MAP as $flag => $message) {
if (($flag & $errors) === $flag) {
$messages[] = $message;
}
}
throw new RuntimeException(sprintf(
'Failed encoding domain due to errors: %s',
implode(', ', $messages)
));
}
/**
* @inheritDoc
*/
public function getFieldValue($format = HeaderInterface::FORMAT_RAW)
{
$emails = [];
$encoding = $this->getEncoding();
foreach ($this->getAddressList() as $address) {
$email = $address->getEmail();
$name = $address->getName();
// quote $name if value requires so
if (! empty($name) && (str_contains($name, ',') || str_contains($name, ';'))) {
// FIXME: what if name contains double quote?
$name = sprintf('"%s"', $name);
}
if (
$format === HeaderInterface::FORMAT_ENCODED
&& 'ASCII' !== $encoding
) {
if (! empty($name)) {
$name = HeaderWrap::mimeEncodeValue($name, $encoding);
}
if (preg_match('/^(.+)@([^@]+)$/', $email, $matches)) {
$localPart = $matches[1];
$hostname = $this->idnToAscii($matches[2]);
$email = sprintf('%s@%s', $localPart, $hostname);
}
}
if (empty($name)) {
$emails[] = $email;
} else {
$emails[] = sprintf('%s <%s>', $name, $email);
}
}
// Ensure the values are valid before sending them.
if ($format !== HeaderInterface::FORMAT_RAW) {
foreach ($emails as $email) {
HeaderValue::assertValid($email);
}
}
return implode(',' . Headers::FOLDING, $emails);
}
/**
* @param string $encoding
* @return self
*/
public function setEncoding($encoding)
{
$this->encoding = $encoding;
return $this;
}
/**
* @return string
*/
public function getEncoding()
{
return $this->encoding;
}
/**
* Set address list for this header
*/
public function setAddressList(AddressList $addressList)
{
$this->addressList = $addressList;
}
/**
* Get address list managed by this header
*
* @return AddressList
*/
public function getAddressList()
{
if (null === $this->addressList) {
$this->setAddressList(new AddressList());
}
return $this->addressList;
}
/**
* @return string
*/
public function toString()
{
$name = $this->getFieldName();
$value = $this->getFieldValue(HeaderInterface::FORMAT_ENCODED);
return empty($value) ? '' : sprintf('%s: %s', $name, $value);
}
/**
* Retrieve comments from value, if any.
*
* Supposed to be private, protected as a workaround for PHP bug 68194
*
* @param string $value
* @return string
*/
protected static function getComments($value)
{
$matches = [];
preg_match_all(
'/\\(
(?P<comment>(
\\\\.|
[^\\\\)]
)+)
\\)/x',
$value,
$matches
);
return isset($matches['comment']) ? implode(', ', $matches['comment']) : '';
}
/**
* Strip all comments from value, if any.
*
* Supposed to be private, protected as a workaround for PHP bug 68194
*
* @param string $value
* @return string
*/
protected static function stripComments($value)
{
return preg_replace(
'/\\(
(
\\\\.|
[^\\\\)]
)+
\\)/x',
'',
$value
);
}
}