removed Formatduration and fixed rounding error, working on overtime calculation

Backend/helper/time.go

@@ -1,6 +1,7 @@
 package helper
 
 import (
+	"fmt"
 	"time"
 )
 
@@ -14,3 +15,23 @@ func GetMonday(ts time.Time) time.Time {
 	}
 	return ts
 }
+
+// Converts duration to string
+func FormatDuration(d time.Duration) string {
+	hours := int(d.Abs().Hours())
+	minutes := int(d.Abs().Minutes()) % 60
+	sign := ""
+	if d < 0 {
+		sign = "-"
+	}
+	switch {
+	case hours > 0 && minutes == 0:
+		return fmt.Sprintf("%s%dh", sign, hours)
+	case hours > 0:
+		return fmt.Sprintf("%s%dh %dmin", sign, hours, minutes)
+	case minutes > 0:
+		return fmt.Sprintf("%s%dmin", sign, minutes)
+	default:
+		return ""
+	}
+}

Backend/helper/time_test.go

@@ -15,3 +15,22 @@ func TestGetMonday(t *testing.T) {
 		t.Error("Wrong date conversion!")
 	}
 }
+
+func TestFormatDuration(t *testing.T) {
+	durations := []struct {
+		name     string
+		duration time.Duration
+	}{
+		{"2h", time.Duration(120 * time.Minute)},
+		{"30min", time.Duration(30 * time.Minute)},
+		{"1h 30min", time.Duration(90 * time.Minute)},
+		{"-1h 30min", time.Duration(-90 * time.Minute)},
+	}
+	for _, d := range durations {
+		t.Run(d.name, func(t *testing.T) {
+			if FormatDuration(d.duration) != d.name {
+				t.Error("Format missmatch in Formatduration.")
+			}
+		})
+	}
+}