Data retention

Dockerfile

@@ -56,6 +56,7 @@ ENV AUTH_USERNAME admin
 ENV AUTH_PASSWORD password
 ENV AUTH_KEY password
 ENV AUTH_ENABLED true
+ENV DATA_RETENTION_IN_DAYS 0
 
 EXPOSE ${PORT}
 VOLUME [ "/data" ]

client/src/pages/dashboard/contexts/DashboardContext.tsx

@@ -47,13 +47,19 @@ export const DashboardContextProvider = ({
 }) => {
 	const viewport = useViewportSize()
 
-	const [dashboardId, setDashboardId] = useState(-1)
+	const { getValues: getQuery, setValues: setQuery } = useQueryString()
+
+	const [dashboardId, setDashboardId] = useState(() => {
+		const query = getQuery()
+		const queryDashboardId = +(query['dashboard'] ?? '')
+
+		return !isNaN(queryDashboardId) ? queryDashboardId : -1
+	})
+
 	const isDashboardSelected = !isNaN(dashboardId) && dashboardId >= 0
 
 	const dashboards = useQuery(['/dashboards'], getDashboards)
 
-	const { getValues: getQuery, setValues: setQuery } = useQueryString()
-
 	const dashboard = useQuery(
 		['/dashboards', dashboardId],
 		() => getDashboard(dashboardId),
@@ -105,9 +111,9 @@ export const DashboardContextProvider = ({
 
 	const [filter, setFilter] = useState<FilterValue>(() => {
 		const query = getQuery()
-		const queryFilter = query.get('interval')
-		const queryFilterFrom = query.get('from')
-		const queryFilterTo = query.get('to')
+		const queryFilter = query['interval']
+		const queryFilterFrom = query['from']
+		const queryFilterTo = query['to']
 
 		const presetInterval =
 			queryFilter &&
@@ -129,13 +135,15 @@ export const DashboardContextProvider = ({
 
 	useEffect(() => {
 		setQuery({
+			...getQuery(),
+			dashboard: dashboardId.toString(),
 			interval: filter.interval,
 			...(filter.interval === 'custom' && {
 				from: filter.customFrom.toISOString(),
 				to: filter.customTo.toISOString(),
 			}),
 		})
-	}, [filter])
+	}, [filter, dashboardId])
 
 	const verticalMode = viewport.width < 800
 

client/src/utils/hooks/useQueryString.ts

@@ -21,8 +21,13 @@ export const useQueryString = () => {
 
 	const getValues = useCallback(() => {
 		const [, searchParams] = valuesRef.current
+		const result = {} as Record<string, string>
 
-		return searchParams
+		searchParams.forEach((value, key) => {
+			result[key] = value
+		})
+
+		return result
 	}, [])
 
 	const setValues = useCallback((values: Record<string, string>) => {

server/.env.example

@@ -6,3 +6,5 @@ AUTH_ENABLED=true
 AUTH_USERNAME=admin
 AUTH_PASSWORD=password
 AUTH_KEY=password
+# How long should the data be stored
+DATA_RETENTION_IN_DAYS=365

server/app/cleaner.go

@@ -1,6 +1,7 @@
 package app
 
 import (
+	"log"
 	"time"
 )
 
@@ -9,7 +10,19 @@ func (s *Server) StartCleaner() {
 
 	go func() {
 		for {
-			s.Services.Sessions.Cleanup()
+			err := s.Services.Sessions.Cleanup()
+
+			if err != nil {
+				log.Println("Error cleaning up sessions:", err)
+			}
+
+			if s.Config.DataRetentionInDays > 0 {
+				err := s.Services.SensorValues.Cleanup(s.Config.DataRetentionInDays)
+				if err != nil {
+					log.Println("Error cleaning up sensor values:", err)
+				}
+			}
+
 			<-ticker.C
 		}
 	}()

server/config/config.go

@@ -1,37 +1,51 @@
 package config
 
 import (
+	"fmt"
 	"os"
 	"strconv"
 )
 
 type Config struct {
-	Mode         string
-	DatabaseUrl  string
-	Port         int
-	Ip           string
-	AuthEnabled  bool
-	AuthUsername string
-	AuthPassword string
-	AuthKey      string
+	Mode                string
+	DatabaseUrl         string
+	Port                int
+	Ip                  string
+	AuthEnabled         bool
+	AuthUsername        string
+	AuthPassword        string
+	AuthKey             string
+	DataRetentionInDays int64
 }
 
 func LoadConfig() *Config {
 	port, err := strconv.Atoi(os.Getenv("PORT"))
 
 	if err != nil {
-		panic(err)
+		panic(fmt.Errorf("PORT must be an integer: %v", err))
+	}
+
+	dataRetentionInDaysStr := os.Getenv("DATA_RETENTION_IN_DAYS")
+	dataRetentionInDays := 0
+
+	if dataRetentionInDaysStr != "" {
+		dataRetentionInDays, err = strconv.Atoi(dataRetentionInDaysStr)
+
+		if err != nil {
+			panic(fmt.Errorf("DATA_RETENTION_IN_DAYS must be an integer: %v", err))
+		}
 	}
 
 	config := Config{
-		Mode:         os.Getenv("GIN_MODE"),
-		DatabaseUrl:  os.Getenv("DATABASE_URL"),
-		Port:         port,
-		Ip:           os.Getenv("BIND_IP"),
-		AuthEnabled:  os.Getenv("AUTH_ENABLED") != "false",
-		AuthUsername: os.Getenv("AUTH_USERNAME"),
-		AuthPassword: os.Getenv("AUTH_PASSWORD"),
-		AuthKey:      os.Getenv("AUTH_KEY"),
+		Mode:                os.Getenv("GIN_MODE"),
+		DatabaseUrl:         os.Getenv("DATABASE_URL"),
+		Port:                port,
+		Ip:                  os.Getenv("BIND_IP"),
+		AuthEnabled:         os.Getenv("AUTH_ENABLED") != "false",
+		AuthUsername:        os.Getenv("AUTH_USERNAME"),
+		AuthPassword:        os.Getenv("AUTH_PASSWORD"),
+		AuthKey:             os.Getenv("AUTH_KEY"),
+		DataRetentionInDays: int64(dataRetentionInDays),
 	}
 
 	// TODO: Crash when any auth* param is empty

server/services/alerts_evaluator_service.go

@@ -84,10 +84,9 @@ func (s *AlertsEvaluatorService) EvaluateAlert(alert *models.AlertItem) error {
 				Value:     condition["value"].(float64),
 			}
 
-			value, err := s.ctx.Services.SensorValues.GetLatest(sensorValueCondition.SensorId, time.Now().Unix())
-			lastValue = value.Value
 			sensorId = int64(sensorValueCondition.SensorId)
 
+			value, err := s.ctx.Services.SensorValues.GetLatest(sensorValueCondition.SensorId, time.Now().Unix())
 			if err != nil {
 				if err == sql.ErrNoRows {
 					lastValue = float64(0)
@@ -96,6 +95,7 @@ func (s *AlertsEvaluatorService) EvaluateAlert(alert *models.AlertItem) error {
 					return fmt.Errorf("error getting sensor value: %v", err)
 				}
 			} else {
+				lastValue = value.Value
 				conditionMet = evaluateSensorValueCondition(sensorValueCondition, value)
 			}
 
@@ -110,22 +110,23 @@ func (s *AlertsEvaluatorService) EvaluateAlert(alert *models.AlertItem) error {
 				ValueUnit: condition["valueUnit"].(string),
 			}
 
-			value, err := s.ctx.Services.SensorValues.GetLatest(sensorLastContactCondition.SensorId, time.Now().Unix())
-			lastValue = float64(value.Timestamp)
 			sensorId = sensorLastContactCondition.SensorId
 
+			value, err := s.ctx.Services.SensorValues.GetLatest(sensorLastContactCondition.SensorId, time.Now().Unix())
+
 			if err != nil {
 				if err == sql.ErrNoRows {
 					lastValue = float64(0)
 				} else {
 					return fmt.Errorf("error getting sensor last contact value: %v", err)
 				}
+			} else {
+				lastValue = float64(value.Timestamp)
+				conditionInSec := int64(sensorLastContactCondition.Value * unitToSeconds(sensorLastContactCondition.ValueUnit))
+				conditionMet = time.Now().Unix()-value.Timestamp > conditionInSec
+
 			}
 
-			conditionInSec := int64(sensorLastContactCondition.Value * unitToSeconds(sensorLastContactCondition.ValueUnit))
-
-			conditionMet = time.Now().Unix()-value.Timestamp > conditionInSec
-
 			break
 		}
 

server/services/config.go

@@ -0,0 +1 @@
+package services

server/services/sensor_values_service.go

@@ -2,6 +2,7 @@ package services
 
 import (
 	"database/sql"
+	"fmt"
 	"time"
 )
 
@@ -41,6 +42,19 @@ func (s *SensorValuesService) GetLatest(sensorId int64, to int64) (*sensorValue,
 	return &value, nil
 }
 
+func (s *SensorValuesService) Cleanup(retentionInDays int64) error {
+	if retentionInDays <= 0 {
+		return fmt.Errorf("retentionInDays must be greater than 0")
+	}
+
+	_, err := s.ctx.DB.Exec("DELETE FROM sensor_values WHERE timestamp < ?", time.Now().Unix()-(retentionInDays*24*60*60))
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 func (s *SensorValuesService) getValueListQuery(sensorId int64, from int64, to int64, divide int64) (*sql.Rows, error) {
 	if divide == 1 {
 		return s.ctx.DB.Query("SELECT timestamp, value FROM sensor_values WHERE sensor_id = ? AND timestamp > ? AND timestamp < ? ORDER BY timestamp ASC", sensorId, from, to)