Exposing job's scheduled unit and interval (#606)

* Added String() function to schedulingUnit

* Exposed job's unit and interval

* ScheduledUnit() returns string instead of schedulingUnit

* Gofumpted

gocron.go

@@ -90,6 +90,10 @@ const (
 	crontab
 )
 
+func (s schedulingUnit) String() string {
+	return [...]string{"milliseconds", "seconds", "minutes", "hours", "days", "weeks", "months", "duration", "crontab"}[s]
+}
+
 func callJobFunc(jobFunc interface{}) {
 	if jobFunc == nil {
 		return

job.go

@@ -446,6 +446,16 @@ func (j *Job) ScheduledTime() time.Time {
 	return j.nextRun
 }
 
+// ScheduledUnit returns the scheduled unit of the Job.
+func (j *Job) ScheduledUnit() string {
+	return j.unit.String()
+}
+
+// Interval returns the scheduled interval of the Job.
+func (j *Job) ScheduledInterval() int {
+	return j.interval
+}
+
 // ScheduledAtTime returns the specific time of day the Job will run at.
 // If multiple times are set, the earliest time will be returned.
 func (j *Job) ScheduledAtTime() string {