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| 1 | <?php |
| 2 | |
| 3 | declare( strict_types = 1 ); |
| 4 | |
| 5 | namespace EntitySchema\Wikibase\Rdf; |
| 6 | |
| 7 | use EntitySchema\Wikibase\DataValues\EntitySchemaValue; |
| 8 | use Wikibase\DataModel\Snak\PropertyValueSnak; |
| 9 | use Wikibase\Repo\Rdf\RdfVocabulary; |
| 10 | use Wikibase\Repo\Rdf\ValueSnakRdfBuilder; |
| 11 | use Wikimedia\Purtle\RdfWriter; |
| 12 | |
| 13 | /** |
| 14 | * RDF mapping for EntitySchema values. |
| 15 | * |
| 16 | * @license GPL-2.0-or-later |
| 17 | * @author Marius Hoch <mail@mariushoch.de> |
| 18 | */ |
| 19 | class EntitySchemaRdfBuilder implements ValueSnakRdfBuilder { |
| 20 | |
| 21 | private RdfVocabulary $vocabulary; |
| 22 | |
| 23 | private string $wikibaseConceptBaseUri; |
| 24 | |
| 25 | private bool $entitySchemaPrefixInitialized = false; |
| 26 | |
| 27 | private ?string $entitySchemaPrefix; |
| 28 | |
| 29 | public function __construct( RdfVocabulary $vocabulary, string $wikibaseConceptBaseUri ) { |
| 30 | $this->vocabulary = $vocabulary; |
| 31 | $this->wikibaseConceptBaseUri = $wikibaseConceptBaseUri; |
| 32 | } |
| 33 | |
| 34 | /** |
| 35 | * Adds specific value |
| 36 | * |
| 37 | * @param RdfWriter $writer |
| 38 | * @param string $propertyValueNamespace Property value relation namespace |
| 39 | * @param string $propertyValueLName Property value relation name |
| 40 | * @param string $dataType Property data type |
| 41 | * @param string $snakNamespace |
| 42 | * @param PropertyValueSnak $snak |
| 43 | */ |
| 44 | public function addValue( |
| 45 | RdfWriter $writer, |
| 46 | $propertyValueNamespace, |
| 47 | $propertyValueLName, |
| 48 | $dataType, |
| 49 | $snakNamespace, |
| 50 | PropertyValueSnak $snak |
| 51 | ) { |
| 52 | $entitySchemaPrefix = $this->getEntitySchemaPrefix(); |
| 53 | $dataValue = $snak->getDataValue(); |
| 54 | $title = $dataValue->getValue(); |
| 55 | if ( $dataValue instanceof EntitySchemaValue ) { |
| 56 | $title = $dataValue->getSchemaId(); |
| 57 | } |
| 58 | if ( $entitySchemaPrefix ) { |
| 59 | $writer->say( $propertyValueNamespace, $propertyValueLName )->is( |
| 60 | $entitySchemaPrefix, |
| 61 | $title |
| 62 | ); |
| 63 | } else { |
| 64 | $writer->say( $propertyValueNamespace, $propertyValueLName )->is( |
| 65 | trim( $this->wikibaseConceptBaseUri . $title ) |
| 66 | ); |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * @return string|null Prefix to use for entity schemas or null if none found. |
| 72 | */ |
| 73 | private function getEntitySchemaPrefix(): ?string { |
| 74 | if ( !$this->entitySchemaPrefixInitialized ) { |
| 75 | $this->entitySchemaPrefixInitialized = true; |
| 76 | $this->entitySchemaPrefix = null; |
| 77 | |
| 78 | foreach ( $this->vocabulary->getNamespaces() as $prefix => $uri ) { |
| 79 | if ( $uri === $this->wikibaseConceptBaseUri ) { |
| 80 | $this->entitySchemaPrefix = $prefix; |
| 81 | break; |
| 82 | } |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | return $this->entitySchemaPrefix; |
| 87 | } |
| 88 | |
| 89 | } |