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<?php |
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namespace PPP\DataModel; |
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use stdClass; |
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/** |
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* A JSON-LD resource node. |
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* |
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* @licence AGPLv3+ |
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* @author Thomas Pellissier Tanon |
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*/ |
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class JsonLdResourceNode extends ResourceNode { |
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/** |
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* @var stdClass |
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*/ |
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private $graph; |
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/** |
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* @param string $value |
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* @param stdClass $graph |
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*/ |
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public function __construct($value, stdClass $graph) { |
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$this->setJsonLdDocumentLoader(); |
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$this->graph = jsonld_compact($graph, 'http://schema.org'); |
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parent::__construct($value); |
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} |
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/** |
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* @return stdClass the compacted graph with as @context http://schema.org |
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*/ |
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public function getGraph() { |
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return $this->graph; |
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} |
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/** |
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* @return string |
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*/ |
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public function getValueType() { |
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return 'resource-jsonld'; |
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} |
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/** |
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* @see AbstractNode::equals |
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*/ |
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public function equals($target) { |
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return $target instanceof self && $this->resourceEquals($this->graph, $target->graph); |
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} |
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private function nodeEquals($a, $b) { |
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if(is_array($a) && is_array($b)) { |
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return $this->arrayEquals($a, $b); |
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} elseif($a instanceof stdClass && $b instanceof stdClass) { |
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return $this->resourceEquals($a, $b); |
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} else { |
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return $a == $b; |
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} |
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} |
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private function arrayEquals(array $a, array $b) { |
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foreach($a as $aValue) { |
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if(!array_reduce($b, function($carry, $bValue) use ($aValue) { |
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return $carry || $this->nodeEquals($aValue, $bValue); |
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}, false)) { |
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return false; |
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} |
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} |
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return true; |
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} |
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private function resourceEquals(stdClass $a, stdClass $b) { |
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if(count(array_intersect($this->getUris($a), $this->getUris($b))) > 0) { |
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return true; |
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} |
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$aArray = get_object_vars($a); |
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$bArray = get_object_vars($b); |
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if(count($aArray) !== count($bArray)) { |
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return false; |
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} |
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foreach($aArray as $aProperty => $aValue) { |
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if(!array_key_exists($aProperty, $bArray) || !$this->nodeEquals($aValue, $bArray[$aProperty])) { |
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return false; |
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} |
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} |
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return true; |
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} |
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private function getUris(stdClass $resource) { |
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$uris = array(); |
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if(property_exists($resource, '@id')) { |
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$uris[] = $resource->{'@id'}; |
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} |
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if(property_exists($resource, 'sameAs')) { |
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$sameAs = $resource->sameAs; |
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if(!is_array($sameAs)) { |
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$sameAs = array($sameAs); |
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} |
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foreach($sameAs as $uri) { |
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if(is_string($uri)) { |
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$uris[] = $uri; |
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} |
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} |
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} |
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return $uris; |
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} |
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private function setJsonLdDocumentLoader() { |
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global $jsonld_default_load_document; |
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$jsonld_default_load_document = '\PPP\DataModel\JsonLdResourceNode::customContextLoader'; |
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} |
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public static function customContextLoader($url) { |
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if($url !== 'http://schema.org') { |
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return jsonld_default_document_loader($url); |
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} else { |
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return (object) array( |
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'contextUrl' => null, |
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'document' => file_get_contents(__DIR__ . '/../data/schemaorg-context.jsonld'), |
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'documentUrl' => 'http://schema.org' |
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); |
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} |
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} |
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} |
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ProjetPP /
PPP-datamodel-PHP
