general improvements

pkg/server/helper.go

@@ -0,0 +1,47 @@
+// Copyright (C) 2018 Marius Schellenberger
+
+package server
+
+import (
+	"errors"
+	"strconv"
+	"time"
+)
+
+const (
+	day = time.Hour * 24
+	min = time.Second * 30
+	max = day * 90
+)
+
+func duration(duration, mode string) (d time.Duration, err error) {
+	var m int
+	m, _ = strconv.Atoi(mode)
+	switch m {
+	case 0:
+		err = errors.New("invalid mode")
+		return
+	case 1:
+		d, err = time.ParseDuration(duration)
+		if err != nil {
+			err = errors.New("could not parse duration")
+			return
+		}
+	case 2:
+		var t int
+		t, err = strconv.Atoi(duration)
+		if err != nil {
+			err = errors.New("could not parse duration")
+			return
+		}
+		d = time.Duration(int(day) * t)
+	}
+
+	if d < min {
+		err = errors.New("minimum duration is 30 seconds")
+	}
+	if d > max {
+		err = errors.New("maximum duration is 90 days")
+	}
+	return
+}