RRTime.java

/*******************************************************************************
 * This file is part of RedReader.
 *
 * RedReader 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.
 *
 * RedReader 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 RedReader.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/

package org.quantumbadger.redreader.common;

import android.content.Context;
import android.text.format.DateFormat;
import org.joda.time.*;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.PeriodFormatter;
import org.joda.time.format.PeriodFormatterBuilder;
import org.quantumbadger.redreader.R;

import java.util.Arrays;
import java.util.List;

public class RRTime {

	private static final DateTimeFormatter
			dtFormatter12hr = DateTimeFormat.forPattern("yyyy-MM-dd h:mm a"),
			dtFormatter24hr = DateTimeFormat.forPattern("yyyy-MM-dd HH:mm");


	public static long utcCurrentTimeMillis() {
		return DateTime.now(DateTimeZone.UTC).getMillis();
	}

	public static String formatDateTime(final long utc_ms, final Context context) {

		final DateTime dateTime = new DateTime(utc_ms);
		final DateTime localDateTime = dateTime.withZone(DateTimeZone.getDefault());

		if (DateFormat.is24HourFormat(context)) {
			return dtFormatter24hr.print(localDateTime);
		} else {
			return dtFormatter12hr.print(localDateTime);
		}
	}

	public static String formatDurationFrom(final Context context, final long startTime) {
		final String space = " ";
		final String comma = ",";
		final String separator = comma + space;

		final long endTime = utcCurrentTimeMillis();
		final DateTime dateTime = new DateTime(endTime);
		final DateTime localDateTime = dateTime.withZone(DateTimeZone.getDefault());
		Period period = new Duration(startTime, endTime).toPeriodTo(localDateTime);

		PeriodFormatter periodFormatter = new PeriodFormatterBuilder()
				.appendYears().appendSuffix(space).appendSuffix(context.getString(R.string.time_year), context.getString(R.string.time_years)).appendSeparator(separator)
				.appendMonths().appendSuffix(space).appendSuffix(context.getString(R.string.time_month), context.getString(R.string.time_months)).appendSeparator(separator)
				.appendDays().appendSuffix(space).appendSuffix(context.getString(R.string.time_day), context.getString(R.string.time_days)).appendSeparator(separator)
				.appendHours().appendSuffix(space).appendSuffix(context.getString(R.string.time_hour), context.getString(R.string.time_hours)).appendSeparator(separator)
				.appendMinutes().appendSuffix(space).appendSuffix(context.getString(R.string.time_min), context.getString(R.string.time_mins)).appendSeparator(separator)
				.appendSeconds().appendSuffix(space).appendSuffix(context.getString(R.string.time_sec), context.getString(R.string.time_secs)).appendSeparator(separator)
				.appendMillis().appendSuffix(space).appendSuffix(context.getString(R.string.time_ms))
				.toFormatter();

		String duration = periodFormatter.print(period.normalizedStandard(PeriodType.yearMonthDayTime()));

		List<String> parts = Arrays.asList(duration.split(comma));
		if (parts.size() >= 2) {
			duration = parts.get(0) + comma + parts.get(1);
		}

		return String.format(context.getString(R.string.time_ago), duration);
	}

	public static long since(long timestamp) {
		return utcCurrentTimeMillis() - timestamp;
	}
}