feat: add Lumen support

src/MetricsController.php

@@ -2,63 +2,28 @@
 
 namespace Superbalist\LaravelPrometheusExporter;
 
-use Illuminate\Contracts\Routing\ResponseFactory;
 use Illuminate\Routing\Controller;
 use Prometheus\RenderTextFormat;
 
 class MetricsController extends Controller
 {
-    /**
-     * @var ResponseFactory
-     */
-    protected $responseFactory;
-
-    /**
-     * @var PrometheusExporter
-     */
-    protected $prometheusExporter;
-
-    /**
-     * @param ResponseFactory $responseFactory
-     * @param PrometheusExporter $prometheusExporter
-     */
-    public function __construct(ResponseFactory $responseFactory, PrometheusExporter $prometheusExporter)
-    {
-        $this->responseFactory = $responseFactory;
-        $this->prometheusExporter = $prometheusExporter;
-    }
-
-    /**
-     * @return ResponseFactory
-     */
-    public function getResponseFactory()
-    {
-        return $this->responseFactory;
-    }
-
-    /**
-     * @return PrometheusExporter
-     */
-    public function getPrometheusExporter()
-    {
-        return $this->prometheusExporter;
-    }
-
     /**
      * GET /metrics
      *
      * The route path is configurable in the prometheus.metrics_route_path config var, or the
      * PROMETHEUS_METRICS_ROUTE_PATH env var.
      *
+     * @param PrometheusExporter $prometheusExporter
      * @return \Symfony\Component\HttpFoundation\Response
      */
-    public function getMetrics()
+    public function getMetrics(PrometheusExporter $prometheusExporter)
     {
-        $metrics = $this->prometheusExporter->export();
-
-        $renderer = new RenderTextFormat();
-        $result = $renderer->render($metrics);
-
-        return $this->responseFactory->make($result, 200, ['Content-Type' => RenderTextFormat::MIME_TYPE]);
+        return response()->make(
+            (new RenderTextFormat)->render(
+                $prometheusExporter->export()
+            ),
+            200,
+            ['Content-Type' => RenderTextFormat::MIME_TYPE]
+        );
     }
 }