Date Utils in Kotlin

gistfile1.txt

import android.text.format.DateUtils

fun getDurationString(secondsElapsed: Long): String {
    val hours = secondsElapsed / 3600
    val minutes = (secondsElapsed % 3600) / 60
    val seconds = secondsElapsed % 60
    return if (hours > 0)
        String.format("%02d:%02d:%02d", hours, minutes, seconds)
    else
        String.format("%02d:%02d", minutes, seconds)
}

fun getCurrentTimeInSeconds() = System.currentTimeMillis() / 1000

const val DAY_IN_SECONDS = DateUtils.DAY_IN_MILLIS / 1000
const val HOUR_IN_SECONDS = DateUtils.HOUR_IN_MILLIS / 1000
const val MINUTE_IN_SECONDS = DateUtils.MINUTE_IN_MILLIS / 1000

fun getElapsedTimeString(timestamp: Long): String {
    var delta = getCurrentTimeInSeconds() - timestamp
    if (delta < 0) {
        return ""
    }
    val days = delta / DAY_IN_SECONDS
    delta -= (days * DAY_IN_SECONDS)
    val hours = delta / HOUR_IN_SECONDS
    delta -= (hours * HOUR_IN_SECONDS)
    val minutes = delta / MINUTE_IN_SECONDS
    delta -= (minutes * MINUTE_IN_SECONDS)
    val seconds = delta

    val dateStr = StringBuilder()

    if (days == 0L) {
        if (hours == 0L) {
            if (minutes == 0L) {
                if (seconds < 10L) {
                    dateStr.append("now")
                } else {
                    dateStr.append(seconds).append("s")
                }
            } else {
                dateStr.append(minutes).append("m")
            }
        } else {
            dateStr.append(hours).append("h")
        }
    } else if (days < 7) {
        dateStr.append(days).append("d")
    } else if (days in 7..31) {
        val weeks = days / 7
        dateStr.append(weeks).append("w")
    } else if (days in 32..365) {
        val months = days / 7 / 4
        dateStr.append(months).append("mo")
    } else {
        val years = days / 365
        dateStr.append(years).append("y")
    }

    return dateStr.toString()
}