1 files changed, 92 insertions, 0 deletions
diff --git a/vendor/open-telemetry/api/Baggage/Propagation/BaggagePropagator.php b/vendor/open-telemetry/api/Baggage/Propagation/BaggagePropagator.php
new file mode 100644
index 000000000..fae62dcab
--- /dev/null
+++ b/vendor/open-telemetry/api/Baggage/Propagation/BaggagePropagator.php
@@ -0,0 +1,92 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\API\Baggage\Propagation;
+
+use OpenTelemetry\API\Baggage\Baggage;
+use OpenTelemetry\API\Baggage\BaggageBuilderInterface;
+use OpenTelemetry\API\Baggage\Entry; /** @phan-suppress-current-line PhanUnreferencedUseNormal */
+use OpenTelemetry\Context\Context;
+use OpenTelemetry\Context\ContextInterface;
+use OpenTelemetry\Context\Propagation\ArrayAccessGetterSetter;
+use OpenTelemetry\Context\Propagation\PropagationGetterInterface;
+use OpenTelemetry\Context\Propagation\PropagationSetterInterface;
+use OpenTelemetry\Context\Propagation\TextMapPropagatorInterface;
+use function rtrim;
+use function urlencode;
+
+/**
+ * @see https://www.w3.org/TR/baggage
+ */
+final class BaggagePropagator implements TextMapPropagatorInterface
+{
+    public const BAGGAGE = 'baggage';
+
+    private static ?self $instance = null;
+
+    public static function getInstance(): self
+    {
+        if (null === self::$instance) {
+            self::$instance = new self();
+        }
+
+        return self::$instance;
+    }
+
+    public function fields(): array
+    {
+        return [self::BAGGAGE];
+    }
+
+    public function inject(&$carrier, PropagationSetterInterface $setter = null, ContextInterface $context = null): void
+    {
+        $setter ??= ArrayAccessGetterSetter::getInstance();
+        $context ??= Context::getCurrent();
+
+        $baggage = Baggage::fromContext($context);
+
+        if ($baggage->isEmpty()) {
+            return;
+        }
+
+        $headerString = '';
+
+        /** @var Entry $entry */
+        foreach ($baggage->getAll() as $key => $entry) {
+            $value = urlencode($entry->getValue());
+            $headerString.= "{$key}={$value}";
+
+            if (($metadata = $entry->getMetadata()->getValue()) !== '' && ($metadata = $entry->getMetadata()->getValue()) !== '0') {
+                $headerString .= ";{$metadata}";
+            }
+
+            $headerString .= ',';
+        }
+
+        if ($headerString !== '' && $headerString !== '0') {
+            $headerString = rtrim($headerString, ',');
+            $setter->set($carrier, self::BAGGAGE, $headerString);
+        }
+    }
+
+    public function extract($carrier, PropagationGetterInterface $getter = null, ContextInterface $context = null): ContextInterface
+    {
+        $getter ??= ArrayAccessGetterSetter::getInstance();
+        $context ??= Context::getCurrent();
+
+        if (!$baggageHeader = $getter->get($carrier, self::BAGGAGE)) {
+            return $context;
+        }
+
+        $baggageBuilder = Baggage::getBuilder();
+        $this->extractValue($baggageHeader, $baggageBuilder);
+
+        return $context->withContextValue($baggageBuilder->build());
+    }
+
+    private function extractValue(string $baggageHeader, BaggageBuilderInterface $baggageBuilder): void
+    {
+        (new Parser($baggageHeader))->parseInto($baggageBuilder);
+    }
+}