Golang Time.Weekday方法代码示例

func (self Weekday) NextAfter(t time.Time) (time.Time, error) {
	diff := int(self) - int(t.Weekday())
	if diff <= 0 {
		diff += 7
	}
	return t.AddDate(0, 0, diff), nil
}

func main() {
	log.Print("Started running timer")
	var numberOfHours int
	var message string
	isWeekend := false
	var currentTime time.Time
	for {
		numberOfHours += 1
		currentTime = time.Now()
		today := currentTime.Weekday()
		hour := currentTime.Hour()
		isWeekend = today == time.Sunday || today == time.Friday || today == time.Saturday
		switch {
		case (hour >= 22 || hour <= 3) && !isWeekend:
			message = "Late night on a weekday. Sleep!."
		case numberOfHours == 1:
			message = "One hour! Take a break"
		case numberOfHours == 2:
			message = "Two hours! Take a break now."
		case numberOfHours > 2: // or default:
			message = "Take a break now. Seriously."
		}

		log.Print("Sleeping program for one hour")
		time.Sleep(1 * time.Hour)

		showNotification(message)
	}

}

// Just like SUBMIT_JOB_BG, but run job at given time instead of
// immediately. This is not currently used and may be removed.
//
// Arguments:
// - NULL byte terminated function name.
// - NULL byte terminated unique ID.
// - NULL byte terminated minute (0-59).
// - NULL byte terminated hour (0-23).
// - NULL byte terminated day of month (1-31).
// - NULL byte terminated month (1-12).
// - NULL byte terminated day of week (0-6, 0 = Monday).
// - Opaque data that is given to the function as an argument.
func (c *Client) SubmitScheduledJob(func_name, uniq string, t time.Time, data []byte) error {

	weekday := int(t.Weekday())

	// go week day number starts at 0 on Sunday,
	// gearman starts at 0 on Monday
	if weekday == 0 {
		weekday = 7
	}
	weekday -= 1

	buf := new(bytes.Buffer)
	buf.WriteString(func_name)
	buf.WriteByte(0)
	buf.WriteString(uniq)
	buf.WriteByte(0)
	buf.WriteString(strconv.Itoa(t.Minute()))
	buf.WriteByte(0)
	buf.WriteString(strconv.Itoa(t.Hour()))
	buf.WriteByte(0)
	buf.WriteString(strconv.Itoa(t.Day()))
	buf.WriteByte(0)
	buf.WriteString(strconv.Itoa(int(t.Month())))
	buf.WriteByte(0)
	buf.WriteString(strconv.Itoa(weekday))
	buf.WriteByte(0)
	buf.Write(data)

	return c.server.Send(CS_SUBMIT_JOB_EPOCH, buf.Bytes())

}

// Returns wheter the Timing is active at the specified time
func (rit *RITiming) IsActiveAt(t time.Time) bool {
	// check for years
	if len(rit.Years) > 0 && !rit.Years.Contains(t.Year()) {
		return false
	}
	// check for months
	if len(rit.Months) > 0 && !rit.Months.Contains(t.Month()) {
		return false
	}
	// check for month days
	if len(rit.MonthDays) > 0 && !rit.MonthDays.Contains(t.Day()) {
		return false
	}
	// check for weekdays
	if len(rit.WeekDays) > 0 && !rit.WeekDays.Contains(t.Weekday()) {
		return false
	}
	//log.Print("Time: ", t)

	//log.Print("Left Margin: ", rit.getLeftMargin(t))
	// check for start hour
	if t.Before(rit.getLeftMargin(t)) {
		return false
	}

	//log.Print("Right Margin: ", rit.getRightMargin(t))
	// check for end hour
	if t.After(rit.getRightMargin(t)) {
		return false
	}
	return true
}

// func (c *Calendar) ValidOn(date string) bool {
// 	if stringDayDateComp(c.StartDate, date) <= 0 && stringDayDateComp(c.EndDate, date) >= 0 {
func (c *Calendar) ValidOn(intday int, t *time.Time) bool {
	if c.StartDate <= intday && c.EndDate >= intday {

		switch t.Weekday() {
		case time.Monday:
			return c.Monday
		case time.Tuesday:
			return c.Tuesday
		case time.Wednesday:
			return c.Wednesday
		case time.Thursday:
			return c.Thursday
		case time.Friday:
			return c.Friday
		case time.Saturday:
			return c.Saturday
		case time.Sunday:
			return c.Sunday
		default:
			return false
		}

	}

	return false
}

func (source mondayAfternoons) GetBetween(start, end time.Time) ([]book.Booking, error) {

	// find next monday
	y, m, d := start.Date()
	daysUntilMonday := int((7 + time.Monday - start.Weekday()) % 7)
	nextmonday := time.Date(y, m, d+daysUntilMonday, 0, 0, 0, 0, start.Location())

	// build a map of booked dates
	bookedSet := make(map[time.Time]bool)
	if booked, err := source.session.List(); err != nil {
		return nil, err
	} else {
		for _, appointment := range booked {
			y, m, d = appointment.Timestamp.Date()
			date := time.Date(y, m, d, 0, 0, 0, 0, start.Location())
			bookedSet[date] = true
		}
	}

	// add a week at a time
	var bookings []book.Booking
	for !nextmonday.After(end) {
		// take days where nothing has been booked yet
		if _, exists := bookedSet[nextmonday]; !exists {
			bookings = append(bookings, lizafternoon{nextmonday})
		}
		nextmonday = nextmonday.AddDate(0, 0, 7)
	}
	return bookings, nil
}

// repl replaces % directives with right time, will panic on unknown directive
func repl(match string, t time.Time) string {
	if match == "%%" {
		return "%"
	}

	format, ok := conv[match]
	if ok {
		return t.Format(format)
	}

	switch match {
	case "%j":
		start := time.Date(t.Year(), time.January, 1, 0, 0, 0, 0, time.UTC)
		day := int(t.Sub(start).Hours()/24) + 1
		return fmt.Sprintf("%03d", day)
	case "%w":
		return fmt.Sprintf("%d", t.Weekday())
	case "%W", "%U":
		start := time.Date(t.Year(), time.January, 1, 23, 0, 0, 0, time.UTC)
		week := 0
		for start.Before(t) {
			week += 1
			start = start.Add(WEEK)
		}

		return fmt.Sprintf("%02d", week)
	}

	panic(fmt.Errorf("unknown directive - %s", match))
	return "" // Make compiler happy
}

// Times returns the start and stop time for
// the closest Day translation to now.
func (d *Day) Times(now time.Time) (closestStart time.Time, closestStop time.Time) {
	if now.IsZero() {
		Log.Error("Cannot find times without reference")
		return
	}

	if loc, err := d.GetLocation(); loc != nil && err == nil {
		now = now.In(loc)
	}

	// find nearest start time of this slot
	if now.Weekday() == d.Day && todayAt(now, d.Start).Before(now) {
		// if the schedule is for today
		// and we are after that scheduled time,
		// then we have found the closest start
		closestStart = todayAt(now, d.Start)
	} else {
		// Step back a day at a time until we find
		// the most recent day that matches the day
		// of the week of our Day.
		for i := 1; i < 8; i++ {
			sTime := now.Add(-time.Duration(i) * 24 * time.Hour)
			if sTime.Weekday() == d.Day {
				closestStart = todayAt(sTime, d.Start)
				break
			}
		}
	}

	// closestStop is just the closests start plus
	// the duration
	closestStop = closestStart.Add(d.Duration)

	return
}

// given a time, calculate the instant that the log should next roll
func calculateNextRollTime(t time.Time, freq rollFrequency) time.Time {
	if freq == RollMinutely {
		t = t.Truncate(time.Minute)
		t = t.Add(time.Minute)
	} else if freq == RollHourly {
		t = t.Truncate(time.Hour)
		t = t.Add(time.Hour)
	} else {
		t = t.Truncate(time.Hour)
		// easiest way to beat DST bugs is to just iterate
		for t.Hour() > 0 {
			t = t.Add(-time.Hour)
		}
		if freq == RollDaily {
			t = t.AddDate(0, 0, 1)
		} else {
			if t.Weekday() == time.Sunday {
				t = t.AddDate(0, 0, 7)
			} else {
				for t.Weekday() != time.Sunday {
					t = t.AddDate(0, 0, 1)
				}
			}
		}
	}

	return t
}

func isGametime(t time.Time) bool {
	var start, end time.Time
	year := t.Year()
	month := t.Month()
	day := t.Day()
	hour := t.Hour()
	loc := t.Location()
	switch t.Weekday() {
	case time.Monday, time.Tuesday, time.Wednesday, time.Thursday:
		start = time.Date(year, month, day, 20, 0, 0, 0, loc)
		end = time.Date(year, month, day, 23, 59, 59, 999999999, loc)
	case time.Friday:
		start = time.Date(year, month, day, 19, 0, 0, 0, loc)
		end = time.Date(year, month, day+1, 2, 59, 59, 999999999, loc)
	case time.Saturday:
		if hour < 3 {
			start = time.Date(year, month, day-1, 23, 59, 59, 999999999, loc)
			end = time.Date(year, month, day, 2, 59, 59, 999999999, loc)
		} else {
			start = time.Date(year, month, day, 15, 0, 0, 0, loc)
			end = time.Date(year, month, day+1, 2, 59, 59, 999999999, loc)
		}
	case time.Sunday:
		if hour < 3 {
			start = time.Date(year, month, day-1, 23, 59, 59, 999999999, loc)
			end = time.Date(year, month, day, 2, 59, 59, 999999999, loc)
		} else {
			start = time.Date(year, month, day, 17, 0, 0, 0, loc)
			end = time.Date(year, month, day, 23, 59, 59, 999999999, loc)
		}
	}
	return (t.After(start) && t.Before(end))
}

func getDateString(d time.Time) string {
	if d.IsZero() {
		return "Date TBC"
	}

	year, month, day := d.Date()
	suffix := "th"
	switch day % 10 {
	case 1:
		if day%100 != 11 {
			suffix = "st"
		}
	case 2:
		if day%100 != 12 {
			suffix = "nd"
		}
	case 3:
		if day%100 != 13 {
			suffix = "rd"
		}
	}
	return d.Weekday().String() + " " + strconv.Itoa(day) + suffix + " " +
		month.String() + " " + strconv.Itoa(year)

}

// FmtDateFull returns the full date representation of 't' for 'ti_ER'
func (ti *ti_ER) FmtDateFull(t time.Time) string {

	b := make([]byte, 0, 32)

	b = append(b, ti.daysWide[t.Weekday()]...)
	b = append(b, []byte{0xe1, 0x8d, 0xa1, 0x20}...)

	if t.Day() < 10 {
		b = append(b, '0')
	}

	b = strconv.AppendInt(b, int64(t.Day()), 10)
	b = append(b, []byte{0x20}...)
	b = append(b, ti.monthsWide[t.Month()]...)
	b = append(b, []byte{0x20, 0xe1, 0x88, 0x98, 0xe1, 0x8b, 0x93, 0xe1, 0x88, 0x8d, 0xe1, 0x89, 0xb2, 0x20}...)
	b = strconv.AppendInt(b, int64(t.Year()), 10)
	b = append(b, []byte{0x20}...)

	if t.Year() < 0 {
		b = append(b, ti.erasWide[0]...)
	} else {
		b = append(b, ti.erasWide[1]...)
	}

	return string(b)
}

func (f FileSystem) DateFilepath(date time.Time) string {
	filename := fmt.Sprintf("%s_%s_%d_%d.md", date.Weekday(), date.Month().String(), date.Day(), date.Year())
	path := path.Join(f.MonthDirectory(date), strings.ToLower(filename))
	f.bootstrap(path)

	return path
}

// IsWeekdayN reports whether the given date is the nth occurrence of the
// day in the month.
//
// The value of n affects the direction of counting:
//   n > 0: counting begins at the first day of the month.
//   n == 0: the result is always false.
//   n < 0: counting begins at the end of the month.
func IsWeekdayN(date time.Time, day time.Weekday, n int) bool {
	cday := date.Weekday()
	if cday != day || n == 0 {
		return false
	}

	if n > 0 {
		return (date.Day()-1)/7 == (n - 1)
	} else {
		n = -n
		last := time.Date(date.Year(), date.Month()+1,
			1, 12, 0, 0, 0, date.Location())
		lastCount := 0
		for {
			last = last.AddDate(0, 0, -1)
			if last.Weekday() == day {
				lastCount++
			}
			if lastCount == n || last.Month() != date.Month() {
				break
			}
		}
		return lastCount == n && last.Month() == date.Month() &&
			last.Day() == date.Day()
	}
}

// IsWorkday reports whether a given date is a work day (business day).
func (c *Calendar) IsWorkday(date time.Time) bool {
	if IsWeekend(date) || c.IsHoliday(date) {
		return false
	}

	if c.Observed == ObservedExact {
		return true
	}

	day := date.Weekday()
	if c.Observed == ObservedMonday && day == time.Monday {
		sun := date.AddDate(0, 0, -1)
		sat := date.AddDate(0, 0, -2)
		return !c.IsHoliday(sat) && !c.IsHoliday(sun)
	} else if c.Observed == ObservedNearest {
		if day == time.Friday {
			sat := date.AddDate(0, 0, 1)
			return !c.IsHoliday(sat)
		} else if day == time.Monday {
			sun := date.AddDate(0, 0, -1)
			return !c.IsHoliday(sun)
		}
	}

	return true
}