basic functionallity with time struct

time.go

package macro

import "time"

type TimeType uint

type Offset string

const (
	Daily = iota
	Weekly
	Monthly
	Yearly
)

type RTime struct {
	DayStart Offset
	DayEnd   Offset
}

func NewRTime() RTime {
	return RTime{
		DayStart: "",
		DayEnd:   "",
	}
}

func (o *Offset) AddYear(year int) {
	*o = Offset( addByType(year, Yearly))
}

func (o *Offset) AddMonth(month int) {
	*o = Offset( addByType(month, Monthly))
}

func (o *Offset) AddWeek(week int) {
	*o = Offset( addByType(week, Weekly))
}

func (o *Offset) AddDay(day int) {
	*o = Offset( addByType(day, Daily))
}

func addByType(amount int, timeType TimeType) string {
	var _time string

	switch timeType {
	case Daily:
		_time = time.Now().AddDate(0, 0, amount).String()
		break
	case Weekly:
		_time =  time.Now().AddDate(0, 0, amount * 7).String()
		break
	case Monthly:
		_time = time.Now().AddDate(0, amount, 0).String()
		break
	case Yearly:
		_time = time.Now().AddDate(amount, 0, 0).String()
		break
	}

	return _time
}