feat: custom gesture & room metrics

metrics/metrics.go

@@ -0,0 +1,43 @@
+package metrics
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/collectors"
+)
+
+type MetricsContainer struct {
+	Registry             *prometheus.Registry
+	LiveConnectionsGauge prometheus.Gauge
+	RaiseGestureCounter  *prometheus.CounterVec
+	SpeakerCounter       *prometheus.CounterVec
+}
+
+const GestureNameLabel string = "gestureString"
+
+func SetupMetrics() MetricsContainer {
+	registry := prometheus.NewRegistry()
+	liveConnectionsGauge := prometheus.NewGauge(prometheus.GaugeOpts{
+		Name: "live_connections_total",
+		Help: "Total amount of live SSE subscriptions to room state",
+	})
+	raiseGestureCounter := prometheus.NewCounterVec(prometheus.CounterOpts{
+		Name: "raise_gesture_total",
+		Help: "Total amount of raised hands",
+	}, []string{GestureNameLabel})
+	speakerCounter := prometheus.NewCounterVec(prometheus.CounterOpts{
+		Name: "speaker_total",
+		Help: "Total amount of speaker turns",
+	}, []string{GestureNameLabel})
+
+	registry.MustRegister(liveConnectionsGauge, raiseGestureCounter, speakerCounter,
+		collectors.NewGoCollector(),
+		collectors.NewProcessCollector(collectors.ProcessCollectorOpts{}),
+	)
+
+	return MetricsContainer{
+		Registry:             registry,
+		LiveConnectionsGauge: liveConnectionsGauge,
+		RaiseGestureCounter:  raiseGestureCounter,
+		SpeakerCounter:       speakerCounter,
+	}
+}