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Nuts'n'Bolts Utilities
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/*
 * Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 David Berkman
 * 
 * This file is part of the SmallMind Code Project.
 * 
 * The SmallMind Code Project is free software, you can redistribute
 * it and/or modify it under either, at your discretion...
 * 
 * 1) The terms of GNU Affero General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 * 
 * ...or...
 * 
 * 2) The terms of the Apache License, Version 2.0.
 * 
 * The SmallMind Code Project is distributed in the hope that it will
 * be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License or Apache License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * and the Apache License along with the SmallMind Code Project. If not, see
 *  or .
 * 
 * Additional permission under the GNU Affero GPL version 3 section 7
 * ------------------------------------------------------------------
 * If you modify this Program, or any covered work, by linking or
 * combining it with other code, such other code is not for that reason
 * alone subject to any of the requirements of the GNU Affero GPL
 * version 3.
 */
package org.smallmind.nutsnbolts.mysql;

import java.util.Date;
import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.ISODateTimeFormat;

public class UTC {

  private static final DateTimeFormatter ISO_DATE_TIME_FORMATTER = ISODateTimeFormat.dateTime();

  public static DateTime isoParse (String date) {

    return ISO_DATE_TIME_FORMATTER.parseDateTime(date);
  }

  public static String isoFormat (Date date) {

    return ISO_DATE_TIME_FORMATTER.print(date.getTime());
  }

  public static Date now () {

    DateTime now;

    return (now = new DateTime()).minusMillis(now.getZone().getOffset(now)).toDate();
  }

  public static Date then (Date date) {

    DateTime then;

    return (then = new DateTime(date.getTime())).minusMillis(then.getZone().getOffset(then)).toDate();
  }

  public static Date local (Date date) {

    return local(date, DateTimeZone.getDefault().getOffset(System.currentTimeMillis()) / 1000 / 60);
  }

  public static Date local (Date date, int offset) {

    return new DateTime(date.getTime()).withZoneRetainFields(DateTimeZone.forOffsetHours(offset)).plusHours(offset).toDate();
  }
}