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<?php
/*
* This file is part of SwiftMailer.
* (c) 2004-2009 Chris Corbyn
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* A collection of MIME headers.
*
* @author Chris Corbyn
*/
class Swift_Mime_SimpleHeaderSet implements Swift_Mime_CharsetObserver
{
/** HeaderFactory */
private $factory;
/** Collection of set Headers */
private $headers = [];
/** Field ordering details */
private $order = [];
/** List of fields which are required to be displayed */
private $required = [];
/** The charset used by Headers */
private $charset;
/**
* Create a new SimpleHeaderSet with the given $factory.
*
* @param string $charset
*/
public function __construct(Swift_Mime_SimpleHeaderFactory $factory, $charset = null)
{
$this->factory = $factory;
if (isset($charset)) {
$this->setCharset($charset);
}
}
public function newInstance()
{
return new self($this->factory);
}
/**
* Set the charset used by these headers.
*
* @param string $charset
*/
public function setCharset($charset)
{
$this->charset = $charset;
$this->factory->charsetChanged($charset);
$this->notifyHeadersOfCharset($charset);
}
/**
* Add a new Mailbox Header with a list of $addresses.
*
* @param string $name
* @param array|string $addresses
*/
public function addMailboxHeader($name, $addresses = null)
{
$this->storeHeader($name, $this->factory->createMailboxHeader($name, $addresses));
}
/**
* Add a new Date header using $dateTime.
*
* @param string $name
*/
public function addDateHeader($name, DateTimeInterface $dateTime = null)
{
$this->storeHeader($name, $this->factory->createDateHeader($name, $dateTime));
}
/**
* Add a new basic text header with $name and $value.
*
* @param string $name
* @param string $value
*/
public function addTextHeader($name, $value = null)
{
$this->storeHeader($name, $this->factory->createTextHeader($name, $value));
}
/**
* Add a new ParameterizedHeader with $name, $value and $params.
*
* @param string $name
* @param string $value
* @param array $params
*/
public function addParameterizedHeader($name, $value = null, $params = [])
{
$this->storeHeader($name, $this->factory->createParameterizedHeader($name, $value, $params));
}
/**
* Add a new ID header for Message-ID or Content-ID.
*
* @param string $name
* @param string|array $ids
*/
public function addIdHeader($name, $ids = null)
{
$this->storeHeader($name, $this->factory->createIdHeader($name, $ids));
}
/**
* Add a new Path header with an address (path) in it.
*
* @param string $name
* @param string $path
*/
public function addPathHeader($name, $path = null)
{
$this->storeHeader($name, $this->factory->createPathHeader($name, $path));
}
/**
* Returns true if at least one header with the given $name exists.
*
* If multiple headers match, the actual one may be specified by $index.
*
* @param string $name
* @param int $index
*
* @return bool
*/
public function has($name, $index = 0)
{
$lowerName = strtolower($name ?? '');
if (!\array_key_exists($lowerName, $this->headers)) {
return false;
}
if (\func_num_args() < 2) {
// index was not specified, so we only need to check that there is at least one header value set
return (bool) \count($this->headers[$lowerName]);
}
return \array_key_exists($index, $this->headers[$lowerName]);
}
/**
* Set a header in the HeaderSet.
*
* The header may be a previously fetched header via {@link get()} or it may
* be one that has been created separately.
*
* If $index is specified, the header will be inserted into the set at this
* offset.
*
* @param int $index
*/
public function set(Swift_Mime_Header $header, $index = 0)
{
$this->storeHeader($header->getFieldName(), $header, $index);
}
/**
* Get the header with the given $name.
*
* If multiple headers match, the actual one may be specified by $index.
* Returns NULL if none present.
*
* @param string $name
* @param int $index
*
* @return Swift_Mime_Header|null
*/
public function get($name, $index = 0)
{
$name = strtolower($name ?? '');
if (\func_num_args() < 2) {
if ($this->has($name)) {
$values = array_values($this->headers[$name]);
return array_shift($values);
}
} else {
if ($this->has($name, $index)) {
return $this->headers[$name][$index];
}
}
}
/**
* Get all headers with the given $name.
*
* @param string $name
*
* @return array
*/
public function getAll($name = null)
{
if (!isset($name)) {
$headers = [];
foreach ($this->headers as $collection) {
$headers = array_merge($headers, $collection);
}
return $headers;
}
$lowerName = strtolower($name ?? '');
if (!\array_key_exists($lowerName, $this->headers)) {
return [];
}
return $this->headers[$lowerName];
}
/**
* Return the name of all Headers.
*
* @return array
*/
public function listAll()
{
$headers = $this->headers;
if ($this->canSort()) {
uksort($headers, [$this, 'sortHeaders']);
}
return array_keys($headers);
}
/**
* Remove the header with the given $name if it's set.
*
* If multiple headers match, the actual one may be specified by $index.
*
* @param string $name
* @param int $index
*/
public function remove($name, $index = 0)
{
$lowerName = strtolower($name ?? '');
unset($this->headers[$lowerName][$index]);
}
/**
* Remove all headers with the given $name.
*
* @param string $name
*/
public function removeAll($name)
{
$lowerName = strtolower($name ?? '');
unset($this->headers[$lowerName]);
}
/**
* Define a list of Header names as an array in the correct order.
*
* These Headers will be output in the given order where present.
*/
public function defineOrdering(array $sequence)
{
$this->order = array_flip(array_map('strtolower', $sequence));
}
/**
* Set a list of header names which must always be displayed when set.
*
* Usually headers without a field value won't be output unless set here.
*/
public function setAlwaysDisplayed(array $names)
{
$this->required = array_flip(array_map('strtolower', $names));
}
/**
* Notify this observer that the entity's charset has changed.
*
* @param string $charset
*/
public function charsetChanged($charset)
{
$this->setCharset($charset);
}
/**
* Returns a string with a representation of all headers.
*
* @return string
*/
public function toString()
{
$string = '';
$headers = $this->headers;
if ($this->canSort()) {
uksort($headers, [$this, 'sortHeaders']);
}
foreach ($headers as $collection) {
foreach ($collection as $header) {
if ($this->isDisplayed($header) || '' != $header->getFieldBody()) {
$string .= $header->toString();
}
}
}
return $string;
}
/**
* Returns a string representation of this object.
*
* @return string
*
* @see toString()
*/
public function __toString()
{
return $this->toString();
}
/** Save a Header to the internal collection */
private function storeHeader($name, Swift_Mime_Header $header, $offset = null)
{
if (!isset($this->headers[strtolower($name ?? '')])) {
$this->headers[strtolower($name ?? '')] = [];
}
if (!isset($offset)) {
$this->headers[strtolower($name ?? '')][] = $header;
} else {
$this->headers[strtolower($name ?? '')][$offset] = $header;
}
}
/** Test if the headers can be sorted */
private function canSort()
{
return \count($this->order) > 0;
}
/** uksort() algorithm for Header ordering */
private function sortHeaders($a, $b)
{
$lowerA = strtolower($a ?? '');
$lowerB = strtolower($b ?? '');
$aPos = \array_key_exists($lowerA, $this->order) ? $this->order[$lowerA] : -1;
$bPos = \array_key_exists($lowerB, $this->order) ? $this->order[$lowerB] : -1;
if (-1 === $aPos && -1 === $bPos) {
// just be sure to be determinist here
return $a > $b ? -1 : 1;
}
if (-1 == $aPos) {
return 1;
} elseif (-1 == $bPos) {
return -1;
}
return $aPos < $bPos ? -1 : 1;
}
/** Test if the given Header is always displayed */
private function isDisplayed(Swift_Mime_Header $header)
{
return \array_key_exists(strtolower($header->getFieldName() ?? ''), $this->required);
}
/** Notify all Headers of the new charset */
private function notifyHeadersOfCharset($charset)
{
foreach ($this->headers as $headerGroup) {
foreach ($headerGroup as $header) {
$header->setCharset($charset);
}
}
}
/**
* Make a deep copy of object.
*/
public function __clone()
{
$this->factory = clone $this->factory;
foreach ($this->headers as $groupKey => $headerGroup) {
foreach ($headerGroup as $key => $header) {
$this->headers[$groupKey][$key] = clone $header;
}
}
}
}