1 files changed, 108 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/Serializers/SemanticDataSerializer.php b/www/wiki/extensions/SemanticMediaWiki/src/Serializers/SemanticDataSerializer.php
new file mode 100644
index 00000000..63085584
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/src/Serializers/SemanticDataSerializer.php
@@ -0,0 +1,108 @@
+<?php
+
+namespace SMW\Serializers;
+
+use OutOfBoundsException;
+use Serializers\Serializer;
+use SMW\SemanticData;
+
+/**
+ * @license GNU GPL v2+
+ * @since 1.9
+ *
+ * @author mwjames
+ */
+class SemanticDataSerializer implements Serializer {
+
+	/**
+	 * @see Serializer::serialize
+	 *
+	 * @since  1.9
+	 */
+	public function serialize( $semanticData ) {
+
+		if ( !$semanticData instanceof SemanticData ) {
+			throw new OutOfBoundsException( 'Object is not supported' );
+		}
+
+		return $this->doSerialize( $semanticData ) + [ 'serializer' => __CLASS__, 'version' => 2 ];
+	}
+
+	private function doSerialize( SemanticData $semanticData ) {
+
+		$data = [
+			'subject' => $semanticData->getSubject()->getSerialization(),
+			'data'    => $this->doSerializeProperty( $semanticData )
+		];
+
+		$subobjects = $this->doSerializeSubSemanticData(
+			$semanticData->getSubSemanticData()
+		);
+
+		if ( $subobjects !== [] ) {
+			$data['sobj'] = $subobjects;
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Build property and dataItem serialization record
+	 *
+	 * @return array
+	 */
+	private function doSerializeProperty( $semanticData ) {
+
+		$properties = [];
+
+		foreach ( $semanticData->getProperties() as $property ) {
+			$properties[] = [
+				'property' => $property->getSerialization(),
+				'dataitem' => $this->doSerializeDataItem( $semanticData, $property )
+			];
+		}
+
+		return $properties;
+	}
+
+	/**
+	 * Returns DataItem serialization
+	 *
+	 * @note 'type' is added to ensure that during unserialization the type
+	 * definition of the requested data is in alignment with the definition found
+	 * in the system (type changes that can occur during the time between
+	 * serialization and unserialization)
+	 *
+	 * @return array
+	 */
+	private function doSerializeDataItem( $semanticData, $property ) {
+
+		$dataItems = [];
+
+		foreach ( $semanticData->getPropertyValues( $property ) as $dataItem ) {
+			$dataItems[] = [
+				'type' => $dataItem->getDIType(),
+				'item' => $dataItem->getSerialization()
+			];
+		}
+
+		return $dataItems;
+	}
+
+	/**
+	 * Returns all subobjects of a SemanticData instance
+	 *
+	 * @return array
+	 */
+	protected function doSerializeSubSemanticData( $subSemanticData ) {
+
+		$subobjects = [];
+
+		foreach ( $subSemanticData as $semanticData ) {
+			$subobjects[] = $this->doSerialize( $semanticData );
+		}
+
+		return $subobjects;
+	}
+
+}