removed Formatduration and fixed rounding error, working on overtime calculation

Backend/models/workDay.go

@@ -4,7 +4,6 @@ import (
 	"arbeitszeitmessung/helper"
 	"database/sql"
 	"encoding/json"
-	"fmt"
 	"log"
 	"strconv"
 	"time"
@@ -180,23 +179,9 @@ func (d *WorkDay) getWorkTime() {
 	d.calcPauseTime()
 }
 
-// Converts duration to string
-func formatDuration(d time.Duration) string {
-	hours := int(d.Abs().Hours())
-	minutes := int(d.Abs().Minutes()) % 60
-	switch {
-	case hours > 0:
-		return fmt.Sprintf("%dh %dmin", hours, minutes)
-	case minutes > 0:
-		return fmt.Sprintf("%dmin", minutes)
-	default:
-		return ""
-	}
-}
-
 func (d *WorkDay) GetWorkTimeString() (string, string) {
-	workString := formatDuration(d.workTime)
-	pauseString := formatDuration(d.pauseTime)
+	workString := helper.FormatDuration(d.workTime)
+	pauseString := helper.FormatDuration(d.pauseTime)
 	return workString, pauseString
 }
 
@@ -210,7 +195,12 @@ func (d *WorkDay) RequiresAction() bool {
 
 // returns a integer percentage of how much day has been worked of
 func (d *WorkDay) GetWorkDayProgress(user User) uint8 {
-	defaultWorkTime := time.Duration(user.ArbeitszeitPerTag * float32(time.Hour))
+	defaultWorkTime := time.Duration(user.ArbeitszeitPerTag * float32(time.Hour)).Round(time.Minute)
 	progress := (d.workTime.Seconds() / defaultWorkTime.Seconds()) * 100
 	return uint8(progress)
 }
+
+func (d *WorkDay) CalcOvertime(user User) time.Duration {
+	overtime := d.workTime - time.Duration(user.ArbeitszeitPerTag*float32(time.Hour)).Round(time.Minute)
+	return overtime
+}