/*
Copyright © 2013-2014, Silent Circle, LLC.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Any redistribution, use, or modification is done solely for personal
benefit and not for any commercial purpose or for monetary gain
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name Silent Circle nor the names of its contributors may
be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL SILENT CIRCLE, LLC BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This implementation is edited version of original Android sources.
*/
/*
* Copyright (C) 2010 The Android Open Source Project
*
* 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.silentcircle.contacts.utils;
import android.content.Context;
import android.text.format.DateFormat;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
/**
* Utility methods for processing dates.
*/
public class DateUtils {
public static final TimeZone UTC_TIMEZONE = TimeZone.getTimeZone("UTC");
// All the SimpleDateFormats in this class use the UTC timezone
public static final SimpleDateFormat NO_YEAR_DATE_FORMAT =
new SimpleDateFormat("--MM-dd", Locale.US);
/**
* When parsing a date without a year, the system assumes 1970, which wasn't a leap-year.
* Let's add a one-off hack for that day of the year
*/
public static final String NO_YEAR_DATE_FEB29TH = "--02-29";
public static final SimpleDateFormat FULL_DATE_FORMAT =
new SimpleDateFormat("yyyy-MM-dd", Locale.US);
public static final SimpleDateFormat DATE_AND_TIME_FORMAT =
new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
public static final SimpleDateFormat NO_YEAR_DATE_AND_TIME_FORMAT =
new SimpleDateFormat("--MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
// Variations of ISO 8601 date format. Do not change the order - it does affect the
// result in ambiguous cases.
private static final SimpleDateFormat[] DATE_FORMATS = {
FULL_DATE_FORMAT,
DATE_AND_TIME_FORMAT,
new SimpleDateFormat("yyyy-MM-dd'T'HH:mm'Z'", Locale.US),
new SimpleDateFormat("yyyyMMdd", Locale.US),
new SimpleDateFormat("yyyyMMdd'T'HHmmssSSS'Z'", Locale.US),
new SimpleDateFormat("yyyyMMdd'T'HHmmss'Z'", Locale.US),
new SimpleDateFormat("yyyyMMdd'T'HHmm'Z'", Locale.US),
};
private static final java.text.DateFormat FORMAT_WITHOUT_YEAR_MONTH_FIRST =
new SimpleDateFormat("MMMM dd");
private static final java.text.DateFormat FORMAT_WITHOUT_YEAR_DAY_FIRST =
new SimpleDateFormat("dd MMMM");
static {
for (SimpleDateFormat format : DATE_FORMATS) {
format.setLenient(true);
format.setTimeZone(UTC_TIMEZONE);
}
NO_YEAR_DATE_FORMAT.setTimeZone(UTC_TIMEZONE);
FORMAT_WITHOUT_YEAR_MONTH_FIRST.setTimeZone(UTC_TIMEZONE);
FORMAT_WITHOUT_YEAR_DAY_FIRST.setTimeZone(UTC_TIMEZONE);
}
/**
* Parses the supplied string to see if it looks like a date. If so,
* returns the date. Otherwise, returns null.
*/
public static Date parseDate(String string) {
ParsePosition parsePosition = new ParsePosition(0);
for (int i = 0; i < DATE_FORMATS.length; i++) {
SimpleDateFormat f = DATE_FORMATS[i];
synchronized (f) {
parsePosition.setIndex(0);
Date date = f.parse(string, parsePosition);
if (parsePosition.getIndex() == string.length()) {
return date;
}
}
}
return null;
}
private static final Date getUtcDate(int year, int month, int dayOfMonth) {
final Calendar calendar = Calendar.getInstance(UTC_TIMEZONE, Locale.US);
calendar.set(Calendar.YEAR, year);
calendar.set(Calendar.MONTH, month);
calendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
return calendar.getTime();
}
/**
* Parses the supplied string to see if it looks like a date. If so,
* returns the same date in a cleaned-up format for the user. Otherwise, returns
* the supplied string unchanged.
*/
public static String formatDate(Context context, String string) {
if (string == null) {
return null;
}
string = string.trim();
if (string.length() == 0) {
return string;
}
ParsePosition parsePosition = new ParsePosition(0);
final boolean noYearParsed;
Date date;
// Unfortunately, we can't parse Feb 29th correctly, so let's handle this day seperately
if (NO_YEAR_DATE_FEB29TH.equals(string)) {
date = getUtcDate(0, Calendar.FEBRUARY, 29);
noYearParsed = true;
} else {
synchronized (NO_YEAR_DATE_FORMAT) {
date = NO_YEAR_DATE_FORMAT.parse(string, parsePosition);
}
noYearParsed = parsePosition.getIndex() == string.length();
}
if (noYearParsed) {
java.text.DateFormat outFormat = isMonthBeforeDay(context)
? FORMAT_WITHOUT_YEAR_MONTH_FIRST
: FORMAT_WITHOUT_YEAR_DAY_FIRST;
synchronized (outFormat) {
return outFormat.format(date);
}
}
for (int i = 0; i < DATE_FORMATS.length; i++) {
SimpleDateFormat f = DATE_FORMATS[i];
synchronized (f) {
parsePosition.setIndex(0);
date = f.parse(string, parsePosition);
if (parsePosition.getIndex() == string.length()) {
java.text.DateFormat outFormat = DateFormat.getDateFormat(context);
outFormat.setTimeZone(UTC_TIMEZONE);
return outFormat.format(date);
}
}
}
return string;
}
public static boolean isMonthBeforeDay(Context context) {
char[] dateFormatOrder = DateFormat.getDateFormatOrder(context);
for (int i = 0; i < dateFormatOrder.length; i++) {
if (dateFormatOrder[i] == DateFormat.DATE) {
return false;
}
if (dateFormatOrder[i] == DateFormat.MONTH) {
return true;
}
}
return false;
}
}