add: record sensors in metrics

pkg/signaler/signaler.go

@@ -14,11 +14,58 @@ import (
 	pb "github.com/chathaway-codes/home-sensors/v2/gen"
 	internalpb "github.com/chathaway-codes/home-sensors/v2/gen/token"
 	"github.com/gofrs/uuid/v5"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 	"google.golang.org/protobuf/proto"
 )
 
+var (
+	temperatureValues = promauto.NewHistogramVec(prometheus.HistogramOpts{
+		Name: "temperature_values_c",
+		Help: "Temperature sensor values in celsius",
+		Buckets: func() []float64 {
+			var buckets []float64
+			for i := -150.0; i < 150; i++ {
+				buckets = append(buckets, i)
+			}
+			return buckets
+		}(),
+	}, []string{
+		"home",
+		"camera",
+	})
+	humidityValues = promauto.NewHistogramVec(prometheus.HistogramOpts{
+		Name: "humidity_values_prh",
+		Help: "Temperature sensor values in %rH",
+		Buckets: func() []float64 {
+			var buckets []float64
+			for i := 0.0; i < 100; i++ {
+				buckets = append(buckets, i)
+			}
+			return buckets
+		}(),
+	}, []string{
+		"home",
+		"camera",
+	})
+	pressureValues = promauto.NewHistogramVec(prometheus.HistogramOpts{
+		Name: "pressure_values_hpa",
+		Help: "Temperature sensor values in hPa",
+		Buckets: func() []float64 {
+			var buckets []float64
+			for i := 900.0; i < 1500; i++ {
+				buckets = append(buckets, i)
+			}
+			return buckets
+		}(),
+	}, []string{
+		"home",
+		"camera",
+	})
+)
+
 type camera struct {
 	id string
 }
@@ -50,6 +97,7 @@ func New() *Server {
 		samplesByCamera:  make(map[string]map[pb.Sample_Type]*pb.Sample),
 	}
 	go s.cleanup()
+	go s.logSensorValues()
 	return s
 }
 
@@ -303,6 +351,35 @@ func (s *Server) ListSamples(ctx context.Context, request *connect.Request[pb.Li
 	}), nil
 }
 
+func (s *Server) logSensorValues() {
+	ticker := time.NewTicker(time.Second * 10)
+	for range ticker.C {
+		func() {
+			s.mu.Lock()
+			defer s.mu.Unlock()
+
+			for home := range s.camerasByHome {
+				for camera := range s.camerasByHome[home] {
+					samples, ok := s.samplesByCamera[camera]
+					if !ok {
+						continue
+					}
+					for _, sample := range samples {
+						switch sample.Type {
+						case pb.Sample_TEMPERATURE_C:
+							temperatureValues.WithLabelValues(home, camera).Observe(sample.GetReading())
+						case pb.Sample_PRESSURE:
+							pressureValues.WithLabelValues(home, camera).Observe(sample.GetReading())
+						case pb.Sample_HUMIDITY:
+							humidityValues.WithLabelValues(home, camera).Observe(sample.GetReading())
+						}
+					}
+				}
+			}
+		}()
+	}
+}
+
 func (s *Server) cleanup() {
 	ticker := time.NewTicker(time.Minute * 5)
 	for t := range ticker.C {