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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\Header\Consumer; |
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use Iterator; |
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use Psr\Log\LoggerInterface; |
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use ZBateson\MailMimeParser\Header\IHeaderPart; |
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use ZBateson\MailMimeParser\Header\Part\MimeToken; |
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use ZBateson\MailMimeParser\Header\Part\MimeTokenPartFactory; |
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/** |
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* Extends AbstractGenericConsumerService to use a MimeTokenPartFactory, and |
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* to preserve all whitespace and escape sequences as-is (unlike other headers |
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* subject headers don't have escape chars such as '\\' for a backslash). |
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* |
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* SubjectConsumerService doesn't define any sub-consumers. |
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* |
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* @author Zaahid Bateson |
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*/ |
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class SubjectConsumerService extends AbstractGenericConsumerService |
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{ |
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public function __construct(LoggerInterface $logger, MimeTokenPartFactory $partFactory) |
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{ |
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parent::__construct($logger, $partFactory); |
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} |
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/** |
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* Overridden to preserve whitespace. |
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* |
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* Whitespace between two words is preserved unless the whitespace begins |
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* with a newline (\n or \r\n), in which case the entire string of |
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* whitespace is discarded, and a single space ' ' character is used in its |
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* place. |
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*/ |
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protected function getPartForToken(string $token, bool $isLiteral) : ?IHeaderPart |
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{ |
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if (\preg_match('/' . MimeToken::MIME_PART_PATTERN . '/', $token)) { |
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return $this->partFactory->newMimeToken($token); |
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} |
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return $this->partFactory->newSubjectToken($token); |
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} |
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/** |
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* Returns an array of \ZBateson\MailMimeParser\Header\Part\HeaderPart for |
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* the current token on the iterator. |
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* |
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* Overridden from AbstractConsumerService to remove special filtering for |
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* backslash escaping, which also seems to not apply to Subject headers at |
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* least in ThunderBird's implementation. |
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* |
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* @return IHeaderPart[] |
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*/ |
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protected function getTokenParts(Iterator $tokens) : array |
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{ |
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return $this->getConsumerTokenParts($tokens); |
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} |
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} |
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zbateson /
mail-mime-parser
