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<?php |
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namespace PPP\Wikidata\ValueFormatters; |
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use InvalidArgumentException; |
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use PPP\DataModel\JsonLdResourceNode; |
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use PPP\Wikidata\ValueFormatters\JsonLd\JsonLdDataValueFormatter; |
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use PPP\Wikidata\WikibaseResourceNode; |
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use stdClass; |
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use ValueFormatters\FormatterOptions; |
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use ValueFormatters\ValueFormatter; |
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use ValueFormatters\ValueFormatterBase; |
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use Wikibase\DataModel\Entity\EntityIdValue; |
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use Wikibase\DataModel\Snak\PropertyValueSnak; |
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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 JsonLdResourceFormatter extends ValueFormatterBase { |
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const RDF_VALUE = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#value'; |
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/** |
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* @var JsonLdDataValueFormatter |
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*/ |
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private $jsonLdFormatter; |
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/** |
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* @var ValueFormatter |
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*/ |
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private $snakFormatter; |
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/** |
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* @param JsonLdDataValueFormatter $jsonLdFormatter |
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* @param ValueFormatter $snakFormatter |
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* @param FormatterOptions $options |
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*/ |
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public function __construct(JsonLdDataValueFormatter $jsonLdFormatter, ValueFormatter $snakFormatter, FormatterOptions $options) { |
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$this->jsonLdFormatter = $jsonLdFormatter; |
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$this->snakFormatter = $snakFormatter; |
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parent::__construct($options); |
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} |
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/** |
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* @see ValueFormatter::format |
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*/ |
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public function format($value) { |
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if(!($value instanceof WikibaseResourceNode)) { |
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throw new InvalidArgumentException('$value is not a WikibaseResourceNode.'); |
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} |
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$resource = $this->buildResourceFromNode($this->jsonLdFormatter->format($value->getDataValue())); |
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$resource->{'@context'} = 'http://schema.org'; |
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$this->addContextToResource($value, $resource); |
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return new JsonLdResourceNode( |
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$this->getName($resource), |
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$resource |
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); |
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} |
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private function buildResourceFromNode($node) { |
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if(!property_exists($node, '@value')) { |
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return $node; |
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} |
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$resource = new stdClass(); |
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$resource->{self::RDF_VALUE} = $node; |
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if(property_exists($node, '@type')) { |
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$resource->{'@type'} = $node->{'@type'}; |
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} else { |
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$resource->{'@type'} = 'Text'; |
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} |
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return $resource; |
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} |
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private function getName(stdClass $resource) { |
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if(property_exists($resource, self::RDF_VALUE)) { |
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return $resource->{self::RDF_VALUE}->{'@value'}; |
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} |
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$namesByLanguage = array(); |
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$names = $resource->name; |
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if(!is_array($names)) { |
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$names = array($names); |
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} |
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foreach($names as $name) { |
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if(is_object($name)) { |
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$namesByLanguage[$name->{'@language'}] = $name->{'@value'}; |
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} else { |
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return $name; |
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} |
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} |
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$language = $this->getOption(self::OPT_LANG); |
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if(array_key_exists($language, $namesByLanguage)) { |
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return $namesByLanguage[$language]; |
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} else { |
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return reset($namesByLanguage); |
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} |
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} |
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private function addContextToResource(WikibaseResourceNode $resourceNode, stdClass $resource) { |
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$fromPredicate = $resourceNode->getFromPredicate(); |
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$fromSubject = $resourceNode->getFromSubject(); |
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if($fromPredicate === null || $fromSubject === null) { |
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return; |
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} |
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$formatted = $this->snakFormatter->format(new PropertyValueSnak($fromPredicate, new EntityIdValue($fromSubject))); |
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if(empty($formatted)) { |
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return; |
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} |
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if(!property_exists($resource, '@reverse')) { |
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$resource->{'@reverse'} = new stdClass(); |
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} |
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foreach($formatted as $property => $value) { |
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$resource->{'@reverse'}->{$property}[] = $value; |
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} |
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} |
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} |
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ProjetPP /
PPP-Wikidata
