DateUtils.java

/*
 * Copyright (c) 2015, Nils Braden
 *
 * This file is part of ttrss-reader-fork. This program is free software; you
 * can redistribute it and/or modify it under the terms of the GNU
 * General Public License as published by the Free Software Foundation;
 * either version 3 of the License, or (at your option) any later
 * version.
 *
 * This program 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 for more details. You should have received a
 * copy of the GNU General Public License along with this program; If
 * not, see http://www.gnu.org/licenses/.
 */

package org.ttrssreader.utils;

import org.ttrssreader.R;
import org.ttrssreader.controllers.Controller;

import android.content.Context;

import java.util.Date;

/**
 * Provides functionality to automatically format date and time values (or both) depending on settings of the app and
 * the systems configuration.
 *
 * @author Nils Braden
 */
public class DateUtils {

	/**
	 * Returns the formatted date and time in the format specified by Controller.dateString() and
	 * Controller.timeString() or if settings indicate the systems configuration should be used it returns the date and
	 * time formatted as specified by the system.
	 *
	 * @param context the application context
	 * @param date    the date to be formatted
	 * @return a formatted representation of the date and time
	 */
	public static String getDateTime(Context context, Date date) {
		if (Controller.getInstance().dateTimeSystem()) {

			java.text.DateFormat dateFormat = android.text.format.DateFormat.getDateFormat(context);
			java.text.DateFormat timeFormat = android.text.format.DateFormat.getTimeFormat(context);
			return dateFormat.format(date) + " " + timeFormat.format(date);

		} else {

			try {

				// Only display delimiter if both formats are available, if the user did set one to an empty string he
				// doesn't want to see this information and we can hide the delimiter too.
				String dateStr = Controller.getInstance().dateString();
				String timeStr = Controller.getInstance().timeString();
				String delimiter = (dateStr.length() > 0 && timeStr.length() > 0) ? " " : "";
				String formatted = dateStr + delimiter + timeStr;
				return android.text.format.DateFormat.format(formatted, date).toString();

			} catch (Exception e) {

				// Retreat to default date-time-format
				java.text.DateFormat dateFormat = android.text.format.DateFormat.getDateFormat(context);
				java.text.DateFormat timeFormat = android.text.format.DateFormat.getTimeFormat(context);
				return dateFormat.format(date) + " " + timeFormat.format(date);

			}

		}
	}

	/**
	 * Returns the formatted date in the format specified by Controller.dateString() or if settings indicate the
	 * systems
	 * configuration should be used it returns the date formatted as specified by the system.
	 *
	 * @param context  the application context
	 * @param dateTime the date to be formatted
	 * @return a formatted representation of the date
	 */
	public static String getDateTimeCustom(Context context, Date dateTime) {
		if (Controller.getInstance().dateTimeSystem()) {

			java.text.DateFormat dateFormat = android.text.format.DateFormat.getDateFormat(context);
			return dateFormat.format(dateTime);

		} else {

			try {
				String format = Controller.getInstance().dateTimeString();
				return android.text.format.DateFormat.format(format, dateTime).toString();

			} catch (Exception e) {
				// Retreat to default date-format
				String format = context.getResources().getString(R.string.DisplayDateTimeFormatDefault);
				return android.text.format.DateFormat.format(format, dateTime).toString();
			}
		}
	}

}