/*
* Created on May 6, 2008
* Created by Paul Gardner
*
* Copyright 2008 Vuze, Inc. All rights reserved.
*
* 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; version 2 of the License only.
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
package com.aelitis.azureus.core.metasearch.impl;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.StringTokenizer;
import java.util.TimeZone;
import org.gudy.azureus2.pluginsimpl.local.utils.xml.rss.RSSUtils;
public class DateParserClassic extends DateParser {
static boolean DEBUG = false;
TimeZone timeZone;
DateFormat ddMMMyyyyFormat;
DateFormat ddMMMyyFormat;
DateFormat MMddyyyyFormat;
DateFormat userDateFormat;
boolean auto;
public DateParserClassic() {
this("GMT",true,null);
}
public DateParserClassic(String timeZone,boolean auto, String dateFormat) {
this.timeZone = TimeZone.getTimeZone(timeZone);
this.auto = auto;
if(!auto) {
if(dateFormat != null) {
userDateFormat = new SimpleDateFormat(dateFormat);
userDateFormat.setTimeZone(this.timeZone);
} else {
//TODO : in debug mode throw an Exception telling the user he needs to provide a dateFormat in manual mode
}
}
ddMMMyyyyFormat = new SimpleDateFormat("dd MMM yyyy");
ddMMMyyyyFormat.setTimeZone(this.timeZone);
ddMMMyyFormat = new SimpleDateFormat("dd MMM yy");
ddMMMyyFormat.setTimeZone(this.timeZone);
MMddyyyyFormat = new SimpleDateFormat("MM-dd yyyy");
MMddyyyyFormat.setTimeZone(this.timeZone);
}
public Date parseDate(String date) {
Date result = null;
if(auto) {
result = parseDateInternal(date);
} else {
if(userDateFormat != null) {
try {
result = userDateFormat.parse(date);
} catch(Exception e) {
//TODO : in debug mode, throw an exception to tell the user that his dateFormat is invalid / didn't parse a date
}
}
}
if(DEBUG) {
System.out.println(date + " > " + (result==null?"null": result.toString()));
}
return result;
}
private Date parseDateInternal(String s) {
if(s == null) {
return null;
}
s = s.toLowerCase().trim();
// screw this mess, first off lets see if we have an RSS feed compatible date
Date d = RSSUtils.parseRSSDate( s );
if ( d != null ){
return( d );
}
//"Today hh:mm" and "Y-day hh:mm" cases
if(s.startsWith("today ") || s.startsWith("y-day ")) {
try {
Calendar calendar = new GregorianCalendar();
calendar.setTimeZone(timeZone);
String time = s.substring(6);
StringTokenizer st = new StringTokenizer(time,":");
int hours = Integer.parseInt(st.nextToken());
int minutes = Integer.parseInt(st.nextToken());
calendar.set(Calendar.HOUR_OF_DAY, hours);
calendar.set(Calendar.MINUTE,minutes);
if(s.startsWith("y-day ")) {
calendar.add(Calendar.DATE, -1);
}
return calendar.getTime();
} catch(Exception e) {
e.printStackTrace();
return null;
}
}
//"07-25 2006", "02-01 02:53" and "03 Mar 2006" cases
if(s.length() > 3) {
String thirdCharacter = s.substring(2,3);
//"07-25 2006" and "02-01 02:53" cases
if(thirdCharacter.equals("-")) {
if(s.length() > 9) {
String ninthCharacter = s.substring(8,9);
//"02-01 02:53" case
if(ninthCharacter.equals(":")) {
try {
int month = Integer.parseInt(s.substring(0,2));
int day = Integer.parseInt(s.substring(3,5));
int hours = Integer.parseInt(s.substring(6,8));
int minutes = Integer.parseInt(s.substring(9,11));
Calendar calendar = new GregorianCalendar();
calendar.setTimeZone(timeZone);
calendar.set(Calendar.MONTH, month-1);
calendar.set(Calendar.DAY_OF_MONTH,day);
calendar.set(Calendar.HOUR_OF_DAY, hours);
calendar.set(Calendar.MINUTE,minutes);
return calendar.getTime();
} catch (Exception e) {
e.printStackTrace();
}
}
//"07-25 2006"
else {
try {
return MMddyyyyFormat.parse(s);
} catch (Exception e) {
e.printStackTrace();
}
}
} else {
//"03-25" case
try {
int month = Integer.parseInt(s.substring(0,2));
int day = Integer.parseInt(s.substring(3,5));
Calendar calendar = new GregorianCalendar();
calendar.setTimeZone(timeZone);
calendar.set(Calendar.MONTH, month);
calendar.set(Calendar.DAY_OF_MONTH,day);
return calendar.getTime();
} catch (Exception e) {
e.printStackTrace();
}
}
} else if(s.length() == 9 && s.indexOf(" ") != -1){
//"21 Mar 08" case
try {
return ddMMMyyFormat.parse(s);
} catch (Exception e) {
if(DEBUG) {e.printStackTrace();}
}
}
//"03 Mar 2006" case
if(thirdCharacter.equals(" ")) {
try {
return ddMMMyyyyFormat.parse(s);
} catch (Exception e) {
if(DEBUG) {e.printStackTrace();}
}
}
}
//Age based stuff
if( s.endsWith(" ago") ||
s.indexOf("month")!= -1 ||
s.indexOf("hour") != -1 ||
s.indexOf("day") != -1 ||
s.indexOf("week") != -1 ||
s.indexOf("year") != -1) {
s= s.replaceAll(" ago", "");
StringTokenizer st = new StringTokenizer(s," ");
if(st.countTokens() >= 2) {
try {
Calendar calendar = new GregorianCalendar();
while(st.hasMoreTokens()) {
float value = Float.parseFloat(st.nextToken());
String unit = st.nextToken();
calendar.setTimeZone(timeZone);
if(unit.startsWith("min")) {
calendar.add(Calendar.MINUTE, -(int)value);
}
if(unit.startsWith("hour")) {
calendar.add(Calendar.HOUR_OF_DAY, -(int)value);
}
if(unit.startsWith("day")) {
calendar.add(Calendar.DATE, -(int)value);
}
if(unit.startsWith("week")) {
calendar.add(Calendar.WEEK_OF_YEAR, -(int)value);
}
if(unit.startsWith("month")) {
calendar.add(Calendar.MONTH, -(int)value);
}
if(unit.startsWith("year")) {
calendar.add(Calendar.YEAR, -(int)value);
}
}
return calendar.getTime();
} catch (Exception e) {
if(DEBUG) {e.printStackTrace();}
}
}
}
if(s.equals("today")) {
Calendar calendar = new GregorianCalendar();
calendar.setTimeZone(timeZone);
//calendar.set(Calendar.HOUR_OF_DAY,12);
//calendar.set(Calendar.MINUTE,0);
return calendar.getTime();
}
if(s.equals("yesterday")) {
Calendar calendar = new GregorianCalendar();
calendar.setTimeZone(timeZone);
calendar.add(Calendar.DATE, -1);
//calendar.set(Calendar.HOUR_OF_DAY,12);
//calendar.set(Calendar.MINUTE,0);
return calendar.getTime();
}
try {
StringTokenizer st = new StringTokenizer(s," ");
Calendar calendar = new GregorianCalendar();
calendar.setTimeZone(timeZone);
while(st.hasMoreTokens()) {
String element = st.nextToken();
int field = -1;
int end_offset = -1;
if(element.endsWith("h")) {
field = Calendar.HOUR_OF_DAY;
end_offset = 1;
}
if(element.endsWith("d")) {
field = Calendar.DAY_OF_MONTH;
end_offset = 1;
}
if(element.endsWith("w")) {
field = Calendar.WEEK_OF_YEAR;
end_offset = 1;
}
if(element.endsWith("m")) {
field = Calendar.MONTH;
end_offset = 1;
}
if(element.endsWith("mon")) {
field = Calendar.MONTH;
end_offset = 3;
}
if(element.endsWith("y")) {
field = Calendar.YEAR;
end_offset = 1;
}
if(field != -1 && end_offset != -1) {
int value = (int) (Float.parseFloat(element.substring(0,element.length() - end_offset)));
calendar.add(field,-value);
}
}
return calendar.getTime();
} catch (Exception e) {
if(DEBUG) {e.printStackTrace();}
}
return null;
}
public static void main(String args[]) {
DEBUG = true;
DateParserClassic dateParser = new DateParserClassic();
dateParser.parseDate("Today 05:34");
dateParser.parseDate("Y-Day 21:55");
dateParser.parseDate("07-25 2006");
dateParser.parseDate("02-01 02:53");
dateParser.parseDate("03 Mar 2006");
dateParser.parseDate("0 minute ago");
dateParser.parseDate("3 hours ago");
dateParser.parseDate("2 days ago");
dateParser.parseDate("10 months ago");
dateParser.parseDate("45 mins ago");
dateParser.parseDate("Today");
dateParser.parseDate("Yesterday");
dateParser.parseDate("16.9w");
dateParser.parseDate("22.6h");
dateParser.parseDate("1.7d");
dateParser.parseDate("2d 7h");
dateParser.parseDate("1w");
dateParser.parseDate("1w 4d");
dateParser.parseDate("1mon 1w");
dateParser.parseDate( "2013-08-11T18:30:00.000Z" );
}
}