const val TIMESTAMP_PATTERN = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'" // eg. 2018-04-01T04:20:25.434Z

    /**
     * Time converting from any timestamp pattern to "5 minutes ago", "1 day ago", etc.
     */
    fun convertTime(timestamp: String): String {
        val mDataFormat: DateFormat = SimpleDateFormat(TIMESTAMP_PATTERN, Locale.ENGLISH)
        return try {
            val date = mDataFormat.parse(timestamp)
            val relativeDateStr = DateUtils.getRelativeTimeSpanString(date.time, Calendar.getInstance().timeInMillis, DateUtils.MINUTE_IN_MILLIS)
            relativeDateStr.toString()
        } catch (e: ParseException) {
            Log.e("ParseException", "Unparseable date " + e.message)
            timestamp
        }
    }