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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\Received; |
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use Psr\Log\LoggerInterface; |
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use ZBateson\MailMimeParser\Header\Consumer\AbstractGenericConsumerService; |
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use ZBateson\MailMimeParser\Header\Consumer\CommentConsumerService; |
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use ZBateson\MailMimeParser\Header\Part\HeaderPartFactory; |
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/** |
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* Consumes simple literal strings for parts of a Received header. |
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* |
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* Starts consuming when the initialized $partName string is located, for |
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* instance when initialized with "FROM", will start consuming on " FROM" or |
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* "FROM ". |
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* |
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* The consumer ends when any possible "Received" header part is found, namely |
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* on one of the following tokens: from, by, via, with, id, for, or when the |
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* start token for the date stamp is found, ';'. |
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* |
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* The consumer allows comments in and around the consumer... although the |
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* Received header specification only allows them before a part, for example, |
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* technically speaking this is valid: |
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* |
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* "FROM machine (host) (comment) BY machine" |
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* |
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* However, this is not: |
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* |
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* "FROM machine (host) BY machine WITH (comment) ESMTP" |
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* |
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* The consumer will allow both. |
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* |
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* @author Zaahid Bateson |
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*/ |
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class GenericReceivedConsumerService extends AbstractGenericConsumerService |
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{ |
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/** |
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* @var string the current part name being parsed. |
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* |
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* This is always the lower-case name provided to the constructor, not the |
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* actual string that started the consumer, which could be in any case. |
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*/ |
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protected $partName; |
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/** |
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* Constructor overridden to include $partName parameter. |
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* |
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*/ |
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public function __construct( |
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LoggerInterface $logger, |
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HeaderPartFactory $partFactory, |
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CommentConsumerService $commentConsumerService, |
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string $partName |
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) { |
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parent::__construct($logger, $partFactory, [$commentConsumerService]); |
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$this->partName = $partName; |
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} |
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/** |
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* Returns true if the passed token matches (case-insensitively) |
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* $this->getPartName() with optional whitespace surrounding it. |
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*/ |
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protected function isStartToken(string $token) : bool |
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{ |
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$pattern = '/^' . \preg_quote($this->partName, '/') . '$/i'; |
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return (\preg_match($pattern, $token) === 1); |
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} |
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/** |
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* Returns true if the token matches (case-insensitively) any of the |
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* following, with optional surrounding whitespace: |
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* |
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* o by |
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* o via |
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* o with |
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* o id |
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* o for |
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* o ; |
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*/ |
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protected function isEndToken(string $token) : bool |
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{ |
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return (\preg_match('/^(by|via|with|id|for|;)$/i', $token) === 1); |
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} |
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/** |
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* Returns a whitespace separator (for filtering ignorable whitespace |
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* between parts), and a separator matching the current part name as |
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* set on $this->partName. |
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* |
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* @return string[] an array of regex pattern matchers |
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*/ |
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protected function getTokenSeparators() : array |
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{ |
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return [ |
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'\s+', |
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'(\A\s*|\s+)(?i)' . \preg_quote($this->partName, '/') . '(?-i)(?=\s+)' |
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]; |
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} |
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/** |
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* @param \ZBateson\MailMimeParser\Header\IHeaderPart[] $parts |
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* @return \ZBateson\MailMimeParser\Header\IHeaderPart[] |
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*/ |
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protected function processParts(array $parts) : array |
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{ |
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return [$this->partFactory->newReceivedPart($this->partName, $parts)]; |
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} |
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} |
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zbateson /
mail-mime-parser
