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<?php |
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namespace Wikibase\DataModel\Serializers; |
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use Serializers\DispatchableSerializer; |
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use Serializers\Exceptions\SerializationException; |
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use Serializers\Exceptions\UnsupportedObjectException; |
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use Serializers\Serializer; |
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use Wikibase\DataModel\Reference; |
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use Wikibase\DataModel\Snak\Snak; |
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use Wikibase\DataModel\Snak\SnakList; |
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/** |
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* Package private |
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* |
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* @license GPL-2.0-or-later |
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* @author Thomas Pellissier Tanon |
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*/ |
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class ReferenceSerializer implements DispatchableSerializer { |
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/** |
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* @var Serializer |
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*/ |
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private $snaksSerializer; |
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public function __construct( Serializer $snaksSerializer ) { |
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$this->snaksSerializer = $snaksSerializer; |
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} |
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/** |
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* @see Serializer::isSerializerFor |
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* |
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* @param mixed $object |
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* |
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* @return bool |
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*/ |
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public function isSerializerFor( $object ) { |
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return $object instanceof Reference; |
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} |
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/** |
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* @see Serializer::serialize |
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* |
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* @param Reference $object |
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* |
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* @throws SerializationException |
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* @return array |
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*/ |
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public function serialize( $object ) { |
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if ( !$this->isSerializerFor( $object ) ) { |
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throw new UnsupportedObjectException( |
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$object, |
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'ReferenceSerializer can only serialize Reference objects' |
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); |
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} |
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return $this->getSerialized( $object ); |
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} |
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private function getSerialized( Reference $reference ) { |
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return [ |
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'hash' => $reference->getHash(), |
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'snaks' => $this->snaksSerializer->serialize( $reference->getSnaks() ), |
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'snaks-order' => $this->buildSnakListOrderList( $reference->getSnaks() ) |
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]; |
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} |
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private function buildSnakListOrderList( SnakList $snaks ) { |
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$list = []; |
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/** |
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* @var Snak $snak |
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*/ |
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foreach ( $snaks as $snak ) { |
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$id = $snak->getPropertyId()->getSerialization(); |
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if ( !in_array( $id, $list ) ) { |
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$list[] = $id; |
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} |
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} |
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return $list; |
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} |
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} |
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