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Mini Shell
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Mime\Header;
use Symfony\Component\Mime\Address;
use Symfony\Component\Mime\Exception\LogicException;
/**
* A collection of headers.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
final class Headers
{
private const UNIQUE_HEADERS = [
'date', 'from', 'sender', 'reply-to', 'to', 'cc', 'bcc',
'message-id', 'in-reply-to', 'references', 'subject',
];
private const HEADER_CLASS_MAP = [
'date' => DateHeader::class,
'from' => MailboxListHeader::class,
'sender' => MailboxHeader::class,
'reply-to' => MailboxListHeader::class,
'to' => MailboxListHeader::class,
'cc' => MailboxListHeader::class,
'bcc' => MailboxListHeader::class,
'message-id' => IdentificationHeader::class,
'in-reply-to' => [UnstructuredHeader::class, IdentificationHeader::class], // `In-Reply-To` and `References` are less strict than RFC 2822 (3.6.4) to allow users entering the original email's ...
'references' => [UnstructuredHeader::class, IdentificationHeader::class], // ... `Message-ID`, even if that is no valid `msg-id`
'return-path' => PathHeader::class,
];
/**
* @var HeaderInterface[][]
*/
private array $headers = [];
private int $lineLength = 76;
public function __construct(HeaderInterface ...$headers)
{
foreach ($headers as $header) {
$this->add($header);
}
}
public function __clone()
{
foreach ($this->headers as $name => $collection) {
foreach ($collection as $i => $header) {
$this->headers[$name][$i] = clone $header;
}
}
}
public function setMaxLineLength(int $lineLength)
{
$this->lineLength = $lineLength;
foreach ($this->all() as $header) {
$header->setMaxLineLength($lineLength);
}
}
public function getMaxLineLength(): int
{
return $this->lineLength;
}
/**
* @param array<Address|string> $addresses
*
* @return $this
*/
public function addMailboxListHeader(string $name, array $addresses): static
{
return $this->add(new MailboxListHeader($name, Address::createArray($addresses)));
}
/**
* @return $this
*/
public function addMailboxHeader(string $name, Address|string $address): static
{
return $this->add(new MailboxHeader($name, Address::create($address)));
}
/**
* @return $this
*/
public function addIdHeader(string $name, string|array $ids): static
{
return $this->add(new IdentificationHeader($name, $ids));
}
/**
* @return $this
*/
public function addPathHeader(string $name, Address|string $path): static
{
return $this->add(new PathHeader($name, $path instanceof Address ? $path : new Address($path)));
}
/**
* @return $this
*/
public function addDateHeader(string $name, \DateTimeInterface $dateTime): static
{
return $this->add(new DateHeader($name, $dateTime));
}
/**
* @return $this
*/
public function addTextHeader(string $name, string $value): static
{
return $this->add(new UnstructuredHeader($name, $value));
}
/**
* @return $this
*/
public function addParameterizedHeader(string $name, string $value, array $params = []): static
{
return $this->add(new ParameterizedHeader($name, $value, $params));
}
/**
* @return $this
*/
public function addHeader(string $name, mixed $argument, array $more = []): static
{
$headerClass = self::HEADER_CLASS_MAP[strtolower($name)] ?? UnstructuredHeader::class;
if (\is_array($headerClass)) {
$headerClass = $headerClass[0];
}
$parts = explode('\\', $headerClass);
$method = 'add'.ucfirst(array_pop($parts));
if ('addUnstructuredHeader' === $method) {
$method = 'addTextHeader';
} elseif ('addIdentificationHeader' === $method) {
$method = 'addIdHeader';
}
return $this->$method($name, $argument, $more);
}
public function has(string $name): bool
{
return isset($this->headers[strtolower($name)]);
}
/**
* @return $this
*/
public function add(HeaderInterface $header): static
{
self::checkHeaderClass($header);
$header->setMaxLineLength($this->lineLength);
$name = strtolower($header->getName());
if (\in_array($name, self::UNIQUE_HEADERS, true) && isset($this->headers[$name]) && \count($this->headers[$name]) > 0) {
throw new LogicException(sprintf('Impossible to set header "%s" as it\'s already defined and must be unique.', $header->getName()));
}
$this->headers[$name][] = $header;
return $this;
}
public function get(string $name): ?HeaderInterface
{
$name = strtolower($name);
if (!isset($this->headers[$name])) {
return null;
}
$values = array_values($this->headers[$name]);
return array_shift($values);
}
public function all(string $name = null): iterable
{
if (null === $name) {
foreach ($this->headers as $name => $collection) {
foreach ($collection as $header) {
yield $name => $header;
}
}
} elseif (isset($this->headers[strtolower($name)])) {
foreach ($this->headers[strtolower($name)] as $header) {
yield $header;
}
}
}
public function getNames(): array
{
return array_keys($this->headers);
}
public function remove(string $name): void
{
unset($this->headers[strtolower($name)]);
}
public static function isUniqueHeader(string $name): bool
{
return \in_array(strtolower($name), self::UNIQUE_HEADERS, true);
}
/**
* @throws LogicException if the header name and class are not compatible
*/
public static function checkHeaderClass(HeaderInterface $header): void
{
$name = strtolower($header->getName());
$headerClasses = self::HEADER_CLASS_MAP[$name] ?? [];
if (!\is_array($headerClasses)) {
$headerClasses = [$headerClasses];
}
if (!$headerClasses) {
return;
}
foreach ($headerClasses as $c) {
if ($header instanceof $c) {
return;
}
}
throw new LogicException(sprintf('The "%s" header must be an instance of "%s" (got "%s").', $header->getName(), implode('" or "', $headerClasses), get_debug_type($header)));
}
public function toString(): string
{
$string = '';
foreach ($this->toArray() as $str) {
$string .= $str."\r\n";
}
return $string;
}
public function toArray(): array
{
$arr = [];
foreach ($this->all() as $header) {
if ('' !== $header->getBodyAsString()) {
$arr[] = $header->toString();
}
}
return $arr;
}
public function getHeaderBody(string $name)
{
return $this->has($name) ? $this->get($name)->getBody() : null;
}
/**
* @internal
*/
public function setHeaderBody(string $type, string $name, mixed $body): void
{
if ($this->has($name)) {
$this->get($name)->setBody($body);
} else {
$this->{'add'.$type.'Header'}($name, $body);
}
}
public function getHeaderParameter(string $name, string $parameter): ?string
{
if (!$this->has($name)) {
return null;
}
$header = $this->get($name);
if (!$header instanceof ParameterizedHeader) {
throw new LogicException(sprintf('Unable to get parameter "%s" on header "%s" as the header is not of class "%s".', $parameter, $name, ParameterizedHeader::class));
}
return $header->getParameter($parameter);
}
/**
* @internal
*/
public function setHeaderParameter(string $name, string $parameter, ?string $value): void
{
if (!$this->has($name)) {
throw new LogicException(sprintf('Unable to set parameter "%s" on header "%s" as the header is not defined.', $parameter, $name));
}
$header = $this->get($name);
if (!$header instanceof ParameterizedHeader) {
throw new LogicException(sprintf('Unable to set parameter "%s" on header "%s" as the header is not of class "%s".', $parameter, $name, ParameterizedHeader::class));
}
$header->setParameter($parameter, $value);
}
}
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