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<?php |
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namespace Groundskeeper\Tokens\Elements; |
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use Groundskeeper\Tokens\Element; |
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use Groundskeeper\Tokens\ElementTypes\ClosedElement; |
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use Groundskeeper\Tokens\ElementTypes\MetadataContent; |
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use Psr\Log\LoggerInterface; |
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class Link extends ClosedElement implements MetadataContent |
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{ |
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protected function getAllowedAttributes() |
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{ |
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$linkAllowedAttributes = array( |
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'/^href$/i' => Element::ATTR_URI, |
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'/^crossorigin$/i' => Element::ATTR_CS_STRING, |
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'/^rel$/i' => Element::ATTR_CI_SSENUM . '("alternate","author","help","icon","license","next","pingback","prefetch","prev","search","stylesheet")', |
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'/^media$/i' => Element::ATTR_CI_STRING, |
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'/^hreflang$/i' => Element::ATTR_CS_STRING, |
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'/^type$/i' => Element::ATTR_CI_STRING, |
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'/^sizes$/i' => Element::ATTR_CI_STRING |
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); |
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return array_merge( |
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$linkAllowedAttributes, |
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parent::getAllowedAttributes() |
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); |
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} |
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protected function doClean(LoggerInterface $logger) |
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{ |
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// Must have "href" attribute. |
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if (!$this->hasAttribute('href')) { |
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$logger->debug('Element "link" requires "href" attribute.'); |
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return false; |
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} |
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// Must have either "rel" or "itemprop" attribute, but not both. |
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$attrCount = 0; |
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foreach ($this->attributes as $key => $value) { |
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if ($key == 'rel' || $key == 'itemprop') { |
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$attrCount++; |
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} |
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if ($attrCount > 1) { |
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// If both, then we don't know which one should be kept, |
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// so we recommend to delete the entire element. |
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$logger->debug('Element "link" requires either "rel" or "itemprop" attribute, but not both.'); |
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return false; |
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} |
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} |
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if ($attrCount == 0) { |
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$logger->debug('Element "link" requires either "rel" or "itemprop" attribute.'); |
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return false; |
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} |
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// If inside "body" element, then we check if allowed. |
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$body = new Body($this->configuration, 'body'); |
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if ($this->hasAncestor($body) && !$this->isAllowedInBody()) { |
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$logger->debug('Element "link" does not have the correct attributes to be allowed inside the "body" element.'); |
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return false; |
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} |
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return true; |
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} |
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/** |
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* Is this element allowed inside a body element? |
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* |
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* https://html.spec.whatwg.org/multipage/semantics.html#allowed-in-the-body |
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* |
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* @return boolean True if allowed. |
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*/ |
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public function isAllowedInBody() |
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{ |
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if ($this->hasAttribute('itemprop')) { |
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return true; |
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} |
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if ($this->hasAttribute('rel') && |
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($this->attributes['rel'] == 'pingback' || |
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$this->attributes['rel'] == 'prefetch' || |
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$this->attributes['rel'] == 'stylesheet')) { |
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return true; |
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} |
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return false; |
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} |
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} |
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kevintweber /
Groundskeeper
