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// Copyright 2015 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package com.google.api.ads.admanager.jaxws.utils.v202402;

import com.google.api.ads.admanager.jaxws.v202402.Date;
import com.google.api.ads.admanager.jaxws.v202402.DateTime;
import com.google.api.ads.admanager.lib.utils.DateTimesHelper;
import java.util.Calendar;
import java.util.Locale;
import org.joda.time.Instant;

/** A utility class for handling {@link DateTime} objects. */
public final class DateTimes {

  private static final DateTimesHelper dateTimesHelper =
      new DateTimesHelper(DateTime.class, Date.class);

  /** DateTimes is not meant to be instantiated. */
  private DateTimes() {}

  /** Converts a {@code Calendar} object to an API date time preserving the time zone. */
  public static DateTime toDateTime(Calendar calendar) {
    return dateTimesHelper.toDateTime(calendar);
  }

  /** Converts an {@code Instant} object to an API date time in the time zone supplied. */
  public static DateTime toDateTime(Instant instant, String timeZoneId) {
    return dateTimesHelper.toDateTime(instant, timeZoneId);
  }

  /** Converts a {@code DateTime} object to an API date time preserving the time zone. */
  public static DateTime toDateTime(org.joda.time.DateTime dateTime) {
    return dateTimesHelper.toDateTime(dateTime);
  }

  /**
   * Converts a string in the form of {@code yyyy-MM-dd'T'HH:mm:ss} to an API date time in the time
   * zone supplied.
   */
  public static DateTime toDateTime(String dateTime, String timeZoneId) {
    return dateTimesHelper.toDateTime(dateTime, timeZoneId);
  }

  /**
   * Converts a string in the form of {@code yyyy-MM-dd'T'HH:mm:ss±HH:mm}, or {@code
   * yyyy-MM-dd'T'HH:mm:ssZ} for Etc/GMT, to an API date time in the time zone supplied.
   */
  public static DateTime toDateTimeWithTimeZone(String dateTime) {
    return dateTimesHelper.toDateTimeWithTimeZone(dateTime);
  }

  /** Converts an API date time to a {@code DateTime} preserving the time zone. */
  public static org.joda.time.DateTime toDateTime(DateTime dateTime) {
    return dateTimesHelper.toDateTime(dateTime);
  }

  /** Gets a calendar for a {@code DateTime} using the default locale, i.e. Locale.getDefault(). */
  public static Calendar toCalendar(DateTime dateTime) {
    return dateTimesHelper.toCalendar(dateTime);
  }

  /** Gets a calendar for a {@code DateTime} in the supplied locale. */
  public static Calendar toCalendar(DateTime dateTime, Locale locale) {
    return dateTimesHelper.toCalendar(dateTime, locale);
  }

  /**
   * Returns string representation of this date.
   *
   * @param date the date to stringify
   * @return a string representation of the {@code Date} in {@code yyyy-MM-dd}
   */
  public static String toString(Date date) {
    return dateTimesHelper.dateToString(date);
  }

  /**
   * Returns string representation of this date time. The string representation does not include the
   * time zone since using date times for filtering does not use the time zone. If you need to
   * convert the date time into another time zone before filtering on it, please use {@link
   * #toStringForTimeZone(DateTime, String)} instead.
   *
   * @param dateTime the date time to stringify
   * @return a string representation of the {@code DateTime} in {@code yyyy-MM-dd'T'HH:mm:ss}
   */
  public static String toString(DateTime dateTime) {
    return dateTimesHelper.toString(dateTime);
  }

  /**
   * Returns string representation of this date time with time zone. If you need to convert the date
   * time into another time zone before filtering on it, please use {@link
   * #toStringForTimeZone(DateTime, String)} instead.
   *
   * @param dateTime the date time to stringify
   * @return a string representation of the {@code DateTime} in {@code yyyy-MM-dd'T'HH:mm:ss±HH:mm},
   *     i.e. {@code 2013-09-013T12:02:03+08:00} or {@code 2013-09-013T12:02:03Z} for Etc/GMT.
   */
  public static String toStringWithTimeZone(DateTime dateTime) {
    return dateTimesHelper.toStringWithTimeZone(dateTime);
  }

  /**
   * Returns string representation of this date time with a different time zone, preserving the
   * millisecond instant.
   *
   * This method is useful for finding the local time in another time zone, especially for
   * filtering.
   *
   * 
For example, if this date time holds 12:30 in Europe/London, the result from this method
   * with Europe/Paris would be 13:30. You may also want to use this with your network's time zone,
   * i.e.
   *
   * 
 String timeZoneId = networkService.getCurrentNetwork().getTimeZone();
   * String statementPart =
   *     "startDateTime > "
   *         + DateTimes.toString(apiDateTime, timeZoneId);
   * //...
   * statementBuilder.where(statementPart);
   * 
   *
   * This method is in the same style of {@link
   * org.joda.time.DateTime#withZone(org.joda.time.DateTimeZone)}.
   *
   * @param dateTime the date time to stringify into a new time zone
   * @param newZoneId the time zone ID of the new zone
   * @return a string representation of the {@code DateTime} in {@code yyyy-MM-dd'T'HH:mm:ss}
   */
  public static String toStringForTimeZone(DateTime dateTime, String newZoneId) {
    return dateTimesHelper.toStringForTimeZone(dateTime, newZoneId);
  }
}