Handle db connection response on the backend

pkg/timeseries/models.go

@@ -1,6 +1,7 @@
 package timeseries
 
 import (
+	"encoding/json"
 	"time"
 
 	"github.com/alexanderzobnin/grafana-zabbix/pkg/zabbix"
@@ -11,6 +12,22 @@ type TimePoint struct {
 	Value *float64
 }
 
+func (p *TimePoint) UnmarshalJSON(data []byte) error {
+	point := &struct {
+		Time  int64
+		Value *float64
+	}{}
+
+	if err := json.Unmarshal(data, &point); err != nil {
+		return err
+	}
+
+	p.Value = point.Value
+	p.Time = time.Unix(point.Time, 0)
+
+	return nil
+}
+
 type TimeSeries []TimePoint
 
 func NewTimeSeries() TimeSeries {