feat: add logrotate settings validation and testing

settings/logrotate.go

@@ -1,13 +1,33 @@
 package settings
 
+import "time"
+
+const (
+	defaultLogrotateIntervalMinutes = 1440
+)
+
+const InvalidLogrotateIntervalMessage = "logrotate interval must be greater than 0"
+
 type Logrotate struct {
 	Enabled  bool   `json:"enabled"`
 	CMD      string `json:"cmd" protected:"true"`
-	Interval int    `json:"interval"`
+	Interval int    `json:"interval" binding:"omitempty,min=1"`
 }
 
 var LogrotateSettings = &Logrotate{
 	Enabled:  false,
 	CMD:      "logrotate /etc/logrotate.d/nginx",
-	Interval: 1440, // 24 hours
+	Interval: defaultLogrotateIntervalMinutes, // 24 hours
+}
+
+func (l Logrotate) HasValidInterval() bool {
+	return l.Interval > 0
+}
+
+func (l Logrotate) GetInterval() time.Duration {
+	if !l.HasValidInterval() {
+		return defaultLogrotateIntervalMinutes * time.Minute
+	}
+
+	return time.Duration(l.Interval) * time.Minute
 }