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<?php declare(strict_types=1); |
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/* |
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* This file is part of the feed-io package. |
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* |
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* (c) Alexandre Debril <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace FeedIo\Rule; |
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use FeedIo\Feed\Node\CategoryInterface; |
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use FeedIo\Feed\NodeInterface; |
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use FeedIo\RuleAbstract; |
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class Category extends RuleAbstract |
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{ |
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const NODE_NAME = 'category'; |
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/** |
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* @param NodeInterface $node |
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* @param \DOMElement $element |
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* @return mixed |
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*/ |
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public function setProperty(NodeInterface $node, \DOMElement $element) : void |
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{ |
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$category = $node->newCategory(); |
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$category->setScheme($this->getAttributeValue($element, 'domain')) |
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->setLabel($element->nodeValue) |
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->setTerm($element->nodeValue); |
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$node->addCategory($category); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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protected function hasValue(NodeInterface $node) : bool |
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{ |
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return !! $node->getCategories(); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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protected function addElement(\DomDocument $document, \DOMElement $rootElement, NodeInterface $node) : void |
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{ |
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foreach ($node->getCategories() as $category) { |
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$rootElement->appendChild($this->createCategoryElement($document, $category)); |
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} |
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} |
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/** |
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* @param \DomDocument $document |
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* @param CategoryInterface $category |
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* @return \DomElement |
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*/ |
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public function createCategoryElement(\DomDocument $document, CategoryInterface $category) : \DOMElement |
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{ |
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$element = $document->createElement( |
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$this->getNodeName(), |
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is_null($category->getTerm()) ? $category->getLabel():$category->getTerm() |
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); |
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if (!! $category->getScheme()) { |
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$element->setAttribute('domain', $category->getScheme()); |
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} |
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return $element; |
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} |
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} |
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In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
string
values, the empty string''
is a special case, in particular the following results might be unexpected: