formatting time of database in UTC to user-set timezone

src/TeslaMateAPICars.go

@@ -137,6 +137,10 @@ func TeslaMateAPICars() (string, bool) {
 			&car.TeslaMateStats.TotalUpdates,
 		)
 
+		// adjusting to timezone differences from UTC to be userspecific
+		car.TeslaMateDetails.InsertedAt = getTimeInTimeZone(car.TeslaMateDetails.InsertedAt)
+		car.TeslaMateDetails.UpdatedAt = getTimeInTimeZone(car.TeslaMateDetails.UpdatedAt)
+
 		// checking for errors after scanning
 		if err != nil {
 			log.Fatal(err)

src/TeslaMateAPICarsStatus.go

@@ -543,6 +543,10 @@ func TeslaMateAPICarsStatus(CarID int) (string, bool) {
 				MQTTInformationData.ClimateDetails.OutsideTemp = celsiusToFahrenheit(MQTTInformationData.ClimateDetails.OutsideTemp)
 			}
 
+			// adjusting to timezone differences from UTC to be userspecific
+			MQTTInformationData.StateSince = getTimeInTimeZone(MQTTInformationData.StateSince)
+			MQTTInformationData.ChargingDetails.ScheduledChargingStartTime = getTimeInTimeZone(MQTTInformationData.ChargingDetails.ScheduledChargingStartTime)
+
 			// setting response as valid
 			ValidResponse = true
 		}

src/TeslaMateAPICarsUpdates.go

@@ -90,6 +90,10 @@ func TeslaMateAPICarsUpdates(CarID int, ResultPage int, ResultShow int) (string,
 			log.Fatal(err)
 		}
 
+		// adjusting to timezone differences from UTC to be userspecific
+		update.StartDate = getTimeInTimeZone(update.StartDate)
+		update.EndDate = getTimeInTimeZone(update.EndDate)
+
 		// appending update to UpdatesData
 		UpdatesData = append(UpdatesData, update)
 		CarData.CarID = CarID

src/TeslaMateAPIGlobalSettings.go

@@ -101,6 +101,10 @@ func TeslaMateAPIGlobalSettings() (string, bool) {
 			log.Fatal(err)
 		}
 
+		// adjusting to timezone differences from UTC to be userspecific
+		GlobalSetting.AccountInfo.InsertedAt = getTimeInTimeZone(GlobalSetting.AccountInfo.InsertedAt)
+		GlobalSetting.AccountInfo.UpdatedAt = getTimeInTimeZone(GlobalSetting.AccountInfo.UpdatedAt)
+
 		// setting response to valid
 		GlobalSettingData = GlobalSetting
 		ValidResponse = true

src/webserver.go

@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"os"
 	"strconv"
+	"time"
 
 	"github.com/gin-gonic/gin"
 	_ "github.com/lib/pq"
@@ -149,6 +150,32 @@ func initAPI() {
 	log.Println("successfully connected to postgres.")
 }
 
+func getTimeInTimeZone(datestring string) string {
+
+	// getting timezone from environment
+	UsersTimezone := getEnv("TM_TZ", "Europe/Berlin")
+
+	// format the dates are stored in postgres
+	TeslaMateDateFormat := "2006-01-02T15:04:05Z"
+
+	// parsing datestring into TeslaMateDateFormat
+	t, _ := time.Parse(TeslaMateDateFormat, datestring)
+
+	// logging UTC time to log
+	// log.Println("UTC: ", t.Format(time.RFC3339))
+
+	// loading timezone location
+	UserLocation, _ := time.LoadLocation(UsersTimezone)
+
+	// formatting in users location in RFC3339 format
+	ReturnDate := t.In(UserLocation).Format(time.RFC3339)
+
+	// logging Users location-converted time to log
+	// log.Println("Location at User: " + ReturnDate)
+
+	return ReturnDate
+}
+
 // getEnv func - read an environment or return a default value
 func getEnv(key string, defaultVal string) string {
 	if value, exists := os.LookupEnv(key); exists {