Function EncodeTimeFlowString

pkg/util/common.go:263–306

(str string, timeNow int64)

}

func EncodeTimeFlowString(str string, timeNow int64) string {
	timeNow = timeNow / 1000
	timeDigits := []int{}
	timeDigitIndex := 0

	if len(str) == 0 {
		return ""
	}

	str = fmt.Sprintf("%d|%s", timeNow, str)

	res := make([]int32, 0, utf8.RuneCountInString(str))
	for timeNow > 0 {
		timeDigits = append(timeDigits, int(timeNow%int64(10)))
		timeNow = timeNow / 10
	}

	add := false
	for pos, rune := range str {
		// take single digit with index timeDigitIndex from timeNow
		newIndex := pos
		if add {
			newIndex = pos + timeDigits[timeDigitIndex]*timeDigitIndex
		} else {
			newIndex = 2*timeDigitIndex*timeDigits[timeDigitIndex] - pos
		}

		if newIndex < 0 {
			newIndex = newIndex * -1
		}

		res = append(res, rune)
		newIndex = newIndex % len(res)

		res[newIndex], res[len(res)-1] = res[len(res)-1], res[newIndex]

		add = !add
		// Add timeDigitIndex by 1, but does not exceed total digits in timeNow
		timeDigitIndex++
		timeDigitIndex = timeDigitIndex % len(timeDigits)
	}

	return string(res)
}

func DecodeTimeFlowStringTime(str string, timeNow int64) string {
	timeNow = timeNow / 1000