Repository.kt

    override suspend fun startCountDown(count: Int) {
        // 10 seconds for count down
        // 100 is a finer number that makes progress run smoother than normal
        val countTime = count * 100
        repeat(countTime) {
            // In case of 10 seconds count down
            // The timer will display as 10 -> 9 -> 8 -> 7 -> 6 -> 5 -> 4 -> 3 -> 2 -> 1 -> 0
            // So it must plus 1
            val displaySeconds = countTime.minus(it).div(100).plus(1)

            // Repeat N will run from N-1 to 0
            val finish = countTime.minus(it) == 1

            // Emit second display and progress state
            _data.emit(CountDown(time = displaySeconds, progress = it, isProgressFinish = false))
            if (finish) {
                _data.emit(CountDown(time = 0, progress = countTime, isProgressFinish = finish))
            }
            delay(10)
        }
    }