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package io.castle.client.internal.utils;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

public class Timestamp {
    private static final DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", new Locale("en", "US", "POSIX"));

    /**
     * Return an ISO 8601 combined date and time string for current date/time
     *
     * @return String with format "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
     */
    public static String timestamp() {
        return timestamp(new Date());
    }

    /**
     * Return an ISO 8601 combined date and time string for specified date/time
     *
     * @param date Date
     * @return String with format "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
     */
    public static String timestamp(Date date) {
        dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
        return dateFormat.format(date);
    }
}