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<?php |
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namespace PPP\Wikidata\ValueFormatters\JsonLd\Entity; |
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use InvalidArgumentException; |
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use PPP\Wikidata\ValueFormatters\JsonLd\JsonLdDataValueFormatter; |
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use ValueFormatters\FormatterOptions; |
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use ValueFormatters\ValueFormatterBase; |
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use Wikibase\DataModel\Entity\PropertyId; |
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use Wikibase\DataModel\Services\Lookup\PropertyLookup; |
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use Wikibase\DataModel\Snak\PropertyValueSnak; |
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use Wikibase\DataModel\Snak\Snak; |
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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 JsonLdSnakFormatter extends ValueFormatterBase { |
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/** |
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* Array of allowed vocabularies to map snaks to. |
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* Example: array('http://schema.org/') |
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*/ |
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const OPT_ALLOWED_VOCABULARIES = 'allowed-vocabularies'; |
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/** |
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* @var PropertyLookup |
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*/ |
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private $propertyLookup; |
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/** |
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* @var EntityOntology |
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*/ |
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private $entityOntology; |
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/** |
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* @var JsonLdDataValueFormatter |
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*/ |
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private $dataValueFormatter; |
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/** |
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* @param PropertyLookup $propertyLookup |
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* @param EntityOntology $entityOntology |
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* @param JsonLdDataValueFormatter $dataValueFormatter |
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* @param FormatterOptions $options |
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*/ |
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public function __construct( |
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PropertyLookup $propertyLookup, |
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EntityOntology $entityOntology, |
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JsonLdDataValueFormatter $dataValueFormatter, |
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FormatterOptions $options |
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) { |
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$this->propertyLookup = $propertyLookup; |
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$this->entityOntology = $entityOntology; |
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$this->dataValueFormatter = $dataValueFormatter; |
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parent::__construct($options); |
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$this->requireOption(self::OPT_ALLOWED_VOCABULARIES); |
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} |
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/** |
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* @see ValueFormatter::format |
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*/ |
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public function format($value) { |
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if(!($value instanceof Snak)) { |
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throw new InvalidArgumentException('$value is not a Snak.'); |
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} |
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return $this->toJsonLdProperties($value); |
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} |
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private function toJsonLdProperties(Snak $snak) { |
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if(!($snak instanceof PropertyValueSnak)) { |
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return array(); |
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} |
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return array_fill_keys( |
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$this->normalizePropertyIris($this->getPropertyIris($snak->getPropertyId())), |
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$this->dataValueFormatter->format($snak->getDataValue()) |
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); |
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} |
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private function getPropertyIris(PropertyId $propertyId) { |
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$property = $this->propertyLookup->getPropertyForId($propertyId); |
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if($property === null) { |
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return array(); |
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} |
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return $this->filterIris($this->entityOntology->getEquivalentPropertiesIris($property)); |
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} |
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private function filterIris(array $iris) { |
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$regex = $this->buildIriFilterRegex(); |
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return array_filter( |
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$iris, |
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function($iri) use ($regex) { |
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return preg_match($regex, $iri); |
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} |
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); |
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} |
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private function buildIriFilterRegex() { |
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$escaped = array_map( |
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function($prefix) { |
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return '(' . preg_quote($prefix, '/') . ')'; |
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}, |
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$this->getOption(self::OPT_ALLOWED_VOCABULARIES) |
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); |
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return '/^' . implode('|', $escaped) . '/'; |
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} |
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private function normalizePropertyIris($iris) { |
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return array_map( |
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function($iri) { |
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return str_replace('http://schema.org/', '', $iri); |
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}, |
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$iris |
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); |
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} |
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} |
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ProjetPP /
PPP-Wikidata
