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<?php |
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/** |
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* This file is part of the ZBateson\MailMimeParser project. |
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* |
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* @license http://opensource.org/licenses/bsd-license.php BSD |
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*/ |
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namespace ZBateson\MailMimeParser\Message\Part\Factory; |
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use ReflectionClass; |
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use Psr\Http\Message\StreamInterface; |
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use ZBateson\MailMimeParser\Header\HeaderFactory; |
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use ZBateson\MailMimeParser\Message\Helper\MessageHelperService; |
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use ZBateson\MailMimeParser\Message\PartFilterFactory; |
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use ZBateson\MailMimeParser\Message\Part\PartBuilder; |
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use ZBateson\MailMimeParser\Stream\StreamFactory; |
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/** |
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* Abstract factory for subclasses of MessagePart. |
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* |
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* @author Zaahid Bateson |
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*/ |
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abstract class MessagePartFactory |
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{ |
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/** |
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* @var PartStreamFilterManagerFactory responsible for creating |
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* PartStreamFilterManager instances |
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*/ |
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protected $partStreamFilterManagerFactory; |
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/** |
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* @var StreamFactory the StreamFactory instance |
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*/ |
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protected $streamFactory; |
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/** |
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* @static MessagePartFactory[] cached instances of MessagePartFactory |
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* sub-classes |
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*/ |
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private static $instances = null; |
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/** |
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* Initializes class dependencies. |
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* |
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* @param StreamFactory $streamFactory |
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* @param PartStreamFilterManagerFactory $psf |
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*/ |
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public function __construct( |
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StreamFactory $streamFactory, |
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PartStreamFilterManagerFactory $psf |
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) { |
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$this->streamFactory = $streamFactory; |
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$this->partStreamFilterManagerFactory = $psf; |
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} |
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/** |
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* Sets a cached singleton instance. |
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* |
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* @param MessagePartFactory $instance |
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*/ |
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protected static function setCachedInstance(MessagePartFactory $instance) |
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{ |
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if (self::$instances === null) { |
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self::$instances = []; |
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} |
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$class = get_called_class(); |
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self::$instances[$class] = $instance; |
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} |
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/** |
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* Returns a cached singleton instance if one exists, or null if one hasn't |
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* been created yet. |
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* |
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* @return MessagePartFactory |
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*/ |
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protected static function getCachedInstance() |
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{ |
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$class = get_called_class(); |
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if (self::$instances === null || !isset(self::$instances[$class])) { |
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return null; |
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} |
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return self::$instances[$class]; |
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} |
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/** |
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* Returns the singleton instance for the class. |
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* |
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* @param StreamFactory $sdf |
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* @param PartStreamFilterManagerFactory $psf |
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* @param HeaderFactory $hf |
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* @param PartFilterFactory $pf |
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* @param MessageHelperService $mhs |
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* @return MessagePartFactory |
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*/ |
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public static function getInstance( |
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StreamFactory $sdf, |
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PartStreamFilterManagerFactory $psf, |
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HeaderFactory $hf = null, |
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PartFilterFactory $pf = null, |
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MessageHelperService $mhs = null |
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) { |
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$instance = static::getCachedInstance(); |
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if ($instance === null) { |
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$ref = new ReflectionClass(get_called_class()); |
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$n = $ref->getConstructor()->getNumberOfParameters(); |
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$args = []; |
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for ($i = 0; $i < $n; ++$i) { |
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$args[] = func_get_arg($i); |
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} |
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$instance = $ref->newInstanceArgs($args); |
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static::setCachedInstance($instance); |
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} |
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return $instance; |
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} |
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/** |
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* Constructs a new MessagePart object and returns it |
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* |
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* @param PartBuilder $partBuilder |
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* @param StreamInterface $messageStream |
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* @return \ZBateson\MailMimeParser\Message\Part\MessagePart |
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*/ |
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public abstract function newInstance(PartBuilder $partBuilder, StreamInterface $messageStream = null); |
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} |
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zbateson /
mail-mime-parser
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