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Consumes simple literal strings for parts of a Received header.

Starts consuming when the initialized $partName string is located, for instance when initialized with "FROM", will start consuming on " FROM" or "FROM ".

The consumer ends when any possible "Received" header part is found, namely on one of the following tokens: from, by, via, with, id, for, or when the start token for the date stamp is found, ';'.

The consumer allows comments in and around the consumer... although the Received header specification only allows them before a part, for example, technically speaking this is valid:

"FROM machine (host) (comment) BY machine"

However, this is not:

"FROM machine (host) BY machine WITH (comment) ESMTP"

The consumer will allow both.

CloneableInstantiable
Methods
public __construct(Psr\Log\LoggerInterface $logger, ZBateson\MailMimeParser\Header\Part\HeaderPartFactory $partFactory, ZBateson\MailMimeParser\Header\Consumer\CommentConsumerService $commentConsumerService, string $partName)
 

Constructor overridden to include $partName parameter.

public ZBateson\MailMimeParser\Header\Consumer\AbstractConsumerService::__invoke(string $value) : array
Properties
protected Psr\Log\LoggerInterface ZBateson\MailMimeParser\Header\Consumer\AbstractConsumerService::$logger
protected ZBateson\MailMimeParser\Header\Part\HeaderPartFactory ZBateson\MailMimeParser\Header\Consumer\AbstractConsumerService::$partFactory
 
  • var \HeaderPartFactory used to construct IHeaderPart objects
protected $partName = NULL
 
  • var string the current part name being parsed. This is always the lower-case name provided to the constructor, not the actual string that started the consumer, which could be in any case.
protected array ZBateson\MailMimeParser\Header\Consumer\AbstractConsumerService::$subConsumers = []
 
  • var \AbstractConsumerService[] array of sub-consumers used by this consumer if any, or an empty array if none exist.
Methods
protected ZBateson\MailMimeParser\Header\Consumer\AbstractConsumerService::advanceToNextToken(Iterator $tokens, bool $isStartToken) : static
 

Determines if the iterator should be advanced to the next token after reading tokens or finding a start token.

The default implementation will advance for a start token, but not advance on the end token of the current consumer, allowing the end token to be passed up to a higher-level consumer.

  • param \Iterator $tokens The token iterator.
  • param bool $isStartToken true for the start token.
protected ZBateson\MailMimeParser\Header\Consumer\AbstractConsumerService::getAllConsumers() : array
 

Returns this consumer and all unique sub consumers.

Loops into the sub-consumers (and their sub-consumers, etc...) finding all unique consumers, and returns them in an array.

  • return \AbstractConsumerService[] Array of unique consumers.
protected ZBateson\MailMimeParser\Header\Consumer\AbstractConsumerService::getAllTokenSeparators() : array
 

Returns a list of regular expression markers for this consumer and all sub-consumers by calling getTokenSeparators().

  • return string[] Array of regular expression markers.
protected ZBateson\MailMimeParser\Header\Consumer\AbstractConsumerService::getConsumerTokenParts(Iterator $tokens) : array
 

Iterates through this consumer's sub-consumers checking if the current token triggers a sub-consumer's start token and passes control onto that sub-consumer's parseTokenIntoParts().

If no sub-consumer is responsible for the current token, calls {@see \AbstractConsumerService::getPartForToken()} and returns it in an array.

  • param \Iterator<string> $tokens
  • return \IHeaderPart[]
protected ZBateson\MailMimeParser\Header\Consumer\AbstractConsumerService::getPartForToken(string $token, bool $isLiteral) : ?ZBateson\MailMimeParser\Header\IHeaderPart
 

Constructs and returns an IHeaderPart for the passed string token.

If the token should be ignored, the function must return null.

The default created part uses the instance's partFactory->newInstance method.

  • param string $token the token
  • param bool $isLiteral set to true if the token represents a literal - e.g. an escaped token
  • return ?\IHeaderPart The constructed header part or null if the token should be ignored.
protected ZBateson\MailMimeParser\Header\Consumer\AbstractConsumerService::getTokenParts(Iterator $tokens) : array
 

Returns an array of IHeaderPart for the current token on the iterator.

If the current token is a start token from a sub-consumer, the sub- consumer's {@see \AbstractConsumerService::parseTokensIntoParts()} method is called.

  • param \Iterator<string> $tokens The token iterator.
  • return \IHeaderPart[]
protected getTokenSeparators() : array
 

Returns a whitespace separator (for filtering ignorable whitespace between parts), and a separator matching the current part name as set on $this->partName.

  • return string[] an array of regex pattern matchers
protected ZBateson\MailMimeParser\Header\Consumer\AbstractConsumerService::getTokenSplitPattern() : string
 

Returns a regex pattern used to split the input header string.

The default implementation calls {@see \AbstractConsumerService::getAllTokenSeparators()} and implodes the returned array with the regex OR '|' character as its glue.

  • return string the regex pattern
protected isEndToken(string $token) : bool
 

Returns true if the token matches (case-insensitively) any of the following, with optional surrounding whitespace:

o by o via o with o id o for o ;

protected isStartToken(string $token) : bool
 

Returns true if the passed token matches (case-insensitively) $this->getPartName() with optional whitespace surrounding it.

protected ZBateson\MailMimeParser\Header\Consumer\AbstractConsumerService::parseTokensIntoParts(Iterator $tokens) : array
 

Iterates over the passed token Iterator and returns an array of parsed IHeaderPart objects.

The method checks each token to see if the token matches a sub-consumer's start token, or if it matches the current consumer's end token to stop processing.

If a sub-consumer's start token is matched, the sub-consumer is invoked and its returned parts are merged to the current consumer's header parts.

After all tokens are read and an array of Header\Parts are constructed, the array is passed to {@see \AbstractConsumerService::processParts} for any final processing if there are any parts.

  • param \Iterator<string> $tokens An iterator over a string of tokens
  • return \IHeaderPart[] An array of parsed parts
protected processParts(array $parts) : array
 
  • param \ZBateson\MailMimeParser\Header\IHeaderPart[] $parts
  • return \ZBateson\MailMimeParser\Header\IHeaderPart[]
protected ZBateson\MailMimeParser\Header\Consumer\AbstractConsumerService::splitRawValue( $rawValue) : array
 

Returns an array of split tokens from the input string.

The method calls preg_split using {@see \AbstractConsumerService::getTokenSplitPattern()}. The split array will not contain any empty parts and will contain the markers.

  • param string $rawValue the raw string
  • return string[] the array of tokens
© 2025 Bruce Wells
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