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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\Part; |
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use Psr\Log\LoggerInterface; |
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use ZBateson\MailMimeParser\ErrorBag; |
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use ZBateson\MbWrapper\MbWrapper; |
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/** |
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* Base HeaderPart for a part that consists of other parts. |
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* |
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* The base container part constructs a string value out of the passed parts by |
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* concatenating their values, discarding whitespace between parts that can be |
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* ignored (in general allows for a single space but removes extras.) |
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* |
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* A ContainerPart can also contain any number of child comment parts. The |
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* CommentParts in this and all child parts can be returned by calling |
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* getComments. |
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* |
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* @author Zaahid Bateson |
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*/ |
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class ContainerPart extends HeaderPart |
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{ |
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/** |
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* @var HeaderPart[] parts that were used to create this part, collected for |
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* proper error reporting and validation. |
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*/ |
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protected $children = []; |
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public function __construct( |
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LoggerInterface $logger, |
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MbWrapper $charsetConverter, |
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array $children |
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) { |
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ErrorBag::__construct($logger); |
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$this->charsetConverter = $charsetConverter; |
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$this->children = $children; |
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$str = (!empty($children)) ? $this->getValueFromParts($children) : ''; |
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parent::__construct( |
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$logger, |
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$this->charsetConverter, |
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$str |
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); |
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} |
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/** |
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* Filters out ignorable space tokens. |
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* |
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* Spaces are removed if parts on either side of it have their |
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* canIgnoreSpaceAfter/canIgnoreSpaceBefore properties set to true. |
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* |
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* @param HeaderPart[] $parts |
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* @return HeaderPart[] |
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*/ |
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protected function filterIgnoredSpaces(array $parts) : array |
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{ |
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$ends = (object) ['isSpace' => true, 'canIgnoreSpacesAfter' => true, 'canIgnoreSpacesBefore' => true, 'value' => '']; |
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$spaced = \array_merge($parts, [$ends]); |
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$filtered = \array_slice(\array_reduce( |
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\array_slice(\array_keys($spaced), 0, -1), |
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function($carry, $key) use ($spaced, $ends) { |
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$p = $spaced[$key]; |
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$l = \end($carry); |
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$a = $spaced[$key + 1]; |
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if ($p->isSpace && $a === $ends) { |
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// trim |
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if ($l->isSpace) { |
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\array_pop($carry); |
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} |
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return $carry; |
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} elseif ($p->isSpace && ($l->isSpace || ($l->canIgnoreSpacesAfter && $a->canIgnoreSpacesBefore))) { |
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return $carry; |
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} |
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return \array_merge($carry, [$p]); |
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}, |
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[$ends] |
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), 1); |
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return $filtered; |
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} |
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/** |
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* Creates the string value representation of this part constructed from the |
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* child parts passed to it. |
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* |
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* The default implementation filters out ignorable whitespace between |
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* parts, and concatenates parts calling 'getValue'. |
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* |
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* @param HeaderParts[] $parts |
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*/ |
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protected function getValueFromParts(array $parts) : string |
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{ |
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return \array_reduce($this->filterIgnoredSpaces($parts), fn ($c, $p) => $c . $p->getValue(), ''); |
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} |
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/** |
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* Returns the child parts this container part consists of. |
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* |
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* @return IHeaderPart[] |
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*/ |
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public function getChildParts() : array |
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{ |
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return $this->children; |
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} |
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public function getComments() : array |
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{ |
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return \array_merge(...\array_filter(\array_map( |
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fn ($p) => ($p instanceof CommentPart) ? [$p] : $p->getComments(), |
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$this->children |
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))); |
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} |
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/** |
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* Returns this part's children, same as getChildParts(). |
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* |
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* @return ErrorBag |
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*/ |
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protected function getErrorBagChildren() : array |
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{ |
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return $this->children; |
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} |
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} |
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