MediaWikiPropagator.php
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MediaWikiPropagator.php
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	<?php
	namespace MediaWiki\Telemetry;

	use Wikimedia\Http\TelemetryHeadersInterface;
	use Wikimedia\Telemetry\ContextPropagatorInterface;
	use Wikimedia\Telemetry\SpanContext;

	/**
	* A {@link ContextPropagatorInterface} implementation that injects headers
	* from MediaWiki's request context, and does not extract any context.
	* @since 1.44
	* @internal
	*/
	class MediaWikiPropagator implements ContextPropagatorInterface {

	private TelemetryHeadersInterface $mwTelemetry;

	public function __construct( TelemetryHeadersInterface $mwTelemetry ) {
	$this->mwTelemetry = $mwTelemetry;
	}

	/**
	* @inheritDoc
	*/
	public function inject( ?SpanContext $spanContext, array $carrier ): array {
	foreach ( $this->mwTelemetry->getRequestHeaders() as $key => $value ) {
	$carrier[$key] = $value;
	}
	return $carrier;
	}

	/**
	* @inheritDoc
	*/
	public function extract( array $carrier ): ?SpanContext {
	return null;
	}
	}