StringExtensions.kt

import java.text.ParseException
import java.text.SimpleDateFormat
import java.util.*


// Converting from String to Date
fun String.getDateWithServerTimeStamp(): Date? {
    val dateFormat = SimpleDateFormat(
        "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'",
        Locale.ENGLISH)
    // 21/08/2020 commented due to something changed on cloud during the morning of this day not revealed
    // dateFormat.timeZone = TimeZone.getTimeZone("UTC")
    try {
        return dateFormat.parse(this)
    } catch (e: ParseException) {
        return null
    }
}




// Getting hours and minute from string server timestamp in format HH:mm
fun String.getHHmmFromDate(): String{
    val cal = Calendar.getInstance()
    cal.time = this.getDateWithServerTimeStamp()!!
    val hours = cal.get(Calendar.HOUR_OF_DAY)
    val minutes = cal.get(Calendar.MINUTE)
    return "${hours}:${minutes}"
}


// Getting DD-MM-YYYY string server timestamp from Date
fun String.getDDMMYYYYFromDate(): String{
    val cal = Calendar.getInstance()
    cal.time = this.getDateWithServerTimeStamp()!!
    val day   = cal.get(Calendar.DAY_OF_MONTH)
    var month = (cal.get(Calendar.MONTH)+1).toString()
    if (month.length <= 1) month = "0$month"
    val year  = cal.get(Calendar.YEAR)
    return "${day}-${month}-${year}"
}


// Getting hours and minute from string date in minutes
fun String.getMinuteOfDayFromServerTimeStamp(): Int{
    val cal = Calendar.getInstance()
    cal.time = this.getDateWithServerTimeStamp()!!
    val hours = cal.get(Calendar.HOUR_OF_DAY)
    val minutes = cal.get(Calendar.MINUTE)
    return (hours*60 + minutes)
}