MathMLRdfBuilder.php
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MathMLRdfBuilder.php
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	<?php

	namespace MediaWiki\Extension\Math;

	use Wikibase\DataModel\Snak\PropertyValueSnak;
	use Wikibase\Repo\Rdf\ValueSnakRdfBuilder;
	use Wikimedia\Purtle\RdfWriter;

	class MathMLRdfBuilder implements ValueSnakRdfBuilder {

	/**
	* Adds a value
	*
	* @param RdfWriter $writer
	* @param string $propertyValueNamespace Property value relation namespace
	* @param string $propertyValueLName Property value relation name
	* @param string $dataType Property data type
	* @param string $snakNamespace
	* @param PropertyValueSnak $snak
	*/
	public function addValue(
	RdfWriter $writer,
	$propertyValueNamespace,
	$propertyValueLName,
	$dataType,
	$snakNamespace,
	PropertyValueSnak $snak
	) {
	$renderer = new MathMathML( $snak->getDataValue()->getValue() );
	if ( $renderer->checkTeX() && $renderer->render() ) {
	$mml = $renderer->getMathml();
	} else {
	$err = $renderer->getLastError();
	$mml = "<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><merror>$err</merror></math>";
	}
	$writer->say( $propertyValueNamespace, $propertyValueLName )
	->value( $mml, 'http://www.w3.org/1998/Math/MathML' );
	}
	}