feat: add extended metrics metadata

src/Client/DefaultRegistrationService.php

@@ -57,6 +57,10 @@ public function register(iterable $strategyHandlers): bool
  'strategies' => array_map(fn (StrategyHandler $strategyHandler): string => $strategyHandler->getStrategyName(), $strategyHandlers),
  'started' => (new DateTimeImmutable())->format('c'),
  'interval' => $this->configuration->getMetricsInterval(),
+ 'platformName' => PHP_SAPI,
+ 'platformVersion' => phpversion(),
+ 'yggdrasilVersion' => null,
+ 'specVersion' => Unleash::SPECIFICATION_VERSION,
  ], JSON_THROW_ON_ERROR)));
  foreach ($this->configuration->getHeaders() as $name => $value) {
  $request = $request->withHeader($name, $value);

src/Metrics/DefaultMetricsSender.php

@@ -8,6 +8,7 @@
 use Psr\Http\Message\RequestFactoryInterface;
 use Unleash\Client\Configuration\UnleashConfiguration;
 use Unleash\Client\Helper\StringStream;
+use Unleash\Client\Unleash;
 
 final readonly class DefaultMetricsSender implements MetricsSender
 {
@@ -32,6 +33,10 @@ public function sendMetrics(MetricsBucket $bucket): void
  'appName' => $this->configuration->getAppName(),
  'instanceId' => $this->configuration->getInstanceId(),
  'bucket' => $bucket->jsonSerialize(),
+ 'platformName' => PHP_SAPI,
+ 'platformVersion' => phpversion(),
+ 'yggdrasilVersion' => null,
+ 'specVersion' => Unleash::SPECIFICATION_VERSION,
  ], JSON_THROW_ON_ERROR)));
  foreach ($this->configuration->getHeaders() as $name => $value) {
  $request = $request->withHeader($name, $value);

src/Repository/DefaultUnleashRepository.php

@@ -34,6 +34,7 @@
 use Unleash\Client\Exception\HttpResponseException;
 use Unleash\Client\Exception\InvalidValueException;
 use Unleash\Client\Helper\Url;
+use Unleash\Client\Unleash;
 
 /**
  * @phpstan-type ConstraintArray array{
@@ -511,7 +512,7 @@ private function fetchFeatures(): array
  ->createRequest('GET', (string) Url::appendPath($this->configuration->getUrl(), 'client/features'))
  ->withHeader('UNLEASH-APPNAME', $this->configuration->getAppName())
  ->withHeader('UNLEASH-INSTANCEID', $this->configuration->getInstanceId())
- ->withHeader('Unleash-Client-Spec', '4.3.2');
+ ->withHeader('Unleash-Client-Spec', Unleash::SPECIFICATION_VERSION);
 
  foreach ($this->configuration->getHeaders() as $name => $value) {
  $request = $request->withHeader($name, $value);

src/Unleash.php

@@ -9,6 +9,8 @@ interface Unleash
 {
  public const string SDK_VERSION = '2.5.1';
 
+ public const string SPECIFICATION_VERSION = '4.3.2';
+
  public function isEnabled(string $featureName, ?Context $context = null, bool $default = false): bool;
 
  public function getVariant(string $featureName, ?Context $context = null, ?Variant $fallbackVariant = null): Variant;