package compbio.cassandra;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class DateFormatter {
	private final static SimpleDateFormat formatYYMMDD = new SimpleDateFormat("yyyy/MM/dd");
	private final static SimpleDateFormat formatDDMMYY = new SimpleDateFormat("dd/MM/yyyy");
	
	/*
	 * convert String date into long date (miliseconds since the epoch start)
	 */
	public static long DateParsing(String datInput, SimpleDateFormat formatter) {
		if (datInput == null) {
			return 0;
		}
		long dateWorkSt = 0;

		try {
			dateWorkSt = formatter.parse(datInput).getTime();
		} catch (ParseException e) {
			e.printStackTrace();
		}
		return dateWorkSt;
	}
	
	/*
	 * date validator
	 * true - if valid date, false - if invalid
	 */
	public static boolean isThisDateValid(String dateToValidate, SimpleDateFormat sdf) {
		if (dateToValidate == null || dateToValidate.equals("")) {
			return false;
		}
		try {
			// if not valid, this will throw ParseException
			sdf.setLenient(false);
			Date date = sdf.parse(dateToValidate);
		} catch (ParseException e) {
			e.printStackTrace();
			return false;
		}
		return true;
	}
	
	/*
	 * convert date from long to String
	 */
	public static String DateLongToString(long indate, SimpleDateFormat formatter) {
		String dateString = formatter.format(new Date(indate));
		return dateString;
	}
	
	public static SimpleDateFormat getFormatYYMMDD() {
		return formatYYMMDD;
	}
	
	public static SimpleDateFormat getFormatDDMMYY() {
		return formatDDMMYY;
	}
}