/*
* Copyright (c) 1998-2007 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Nam Nguyen
*/
package com.caucho.quercus.lib.date;
import java.util.TimeZone;
import com.caucho.quercus.UnimplementedException;
import com.caucho.quercus.annotation.ClassImplementation;
import com.caucho.quercus.annotation.Optional;
import com.caucho.quercus.env.ArrayValue;
import com.caucho.quercus.env.ArrayValueImpl;
import com.caucho.quercus.env.BooleanValue;
import com.caucho.quercus.env.LongValue;
import com.caucho.quercus.env.StringValue;
import com.caucho.quercus.env.Value;
/**
* Date functions.
*/
public class DateTimeZone
{
private TimeZone _timeZone;
protected DateTimeZone()
{
_timeZone = TimeZone.getDefault();
}
protected DateTimeZone(String id)
{
_timeZone = TimeZone.getTimeZone(id);
}
public static DateTimeZone __construct(String id)
{
return new DateTimeZone(id);
}
public static ArrayValue listAbbreviations()
{
ArrayValue array = new ArrayValueImpl();
String []ids = TimeZone.getAvailableIDs();
for (int i = 0; i < ids.length; i++) {
TimeZone tz = TimeZone.getTimeZone(ids[i]);
addAbbreviation(array, tz, false);
if (tz.useDaylightTime())
addAbbreviation(array, tz, true);
}
return array;
}
private static void addAbbreviation(ArrayValue array,
TimeZone tz,
boolean isDST)
{
ArrayValueImpl zone = new ArrayValueImpl();
zone.put("dst", isDST);
int offset = tz.getRawOffset() / 1000;
if (isDST)
offset += tz.getDSTSavings() / 1000;
zone.put("offset", offset);
zone.put("timezone_id", tz.getID());
String name = tz.getDisplayName(isDST, TimeZone.SHORT);
Value nameV = StringValue.create(name.toLowerCase());
Value zones = array.get(nameV);
if (zones.isNull()) {
zones = new ArrayValueImpl();
array.put(nameV, zones);
}
zones.put(zone);
}
public static ArrayValue listIdentifiers()
{
ArrayValue array = new ArrayValueImpl();
String []ids = TimeZone.getAvailableIDs();
java.util.Arrays.sort(ids);
for (int i = 0; i < ids.length; i++) {
array.put(ids[i]);
}
return array;
}
public String getName()
{
return _timeZone.getID();
}
public long getOffset(DateTime dateTime)
{
return _timeZone.getOffset(dateTime.getTime()) / 1000L;
}
/* commented out for wordpress-2.8.1
public Value getTransitions(@Optional int timestampBegin,
@Optional int timestampEnd)
{
throw new UnimplementedException("DateTimeZone->getTransitions()");
}
*/
protected TimeZone getTimeZone()
{
return _timeZone;
}
protected static Value findTimeZone(StringValue abbr)
{
// Can't use TimeZone.getTimeZone() because that function returns
// GMT timezone by default if not found
ArrayValue array = listAbbreviations();
Value zones = array.get(abbr.toLowerCase());
if (zones.isset())
return zones.get(LongValue.ZERO).get(StringValue.create("timezone_id"));
else
return BooleanValue.FALSE;
}
protected static Value findTimeZone(StringValue abbr,
int offset,
boolean isDST)
{
ArrayValue array = listAbbreviations();
Value zones = array.get(abbr.toLowerCase());
if (zones.isset() && zones.isArray()) {
Value offsetStr = StringValue.create("offset");
for (Value zone : ((ArrayValue)zones).values()) {
if (zone.get(offsetStr).toInt() == offset)
return zone.get(StringValue.create("timezone_id"));
}
}
return findTimeZone(offset, isDST);
}
protected static Value findTimeZone(int offset,
boolean isDST)
{
String []zoneIDs = TimeZone.getAvailableIDs(offset * 1000);
for (int i = 0; i < zoneIDs.length; i++) {
TimeZone zone = TimeZone.getTimeZone(zoneIDs[i]);
if (isDST == zone.useDaylightTime())
return StringValue.create(zoneIDs[i]);
}
return BooleanValue.FALSE;
}
public String toString()
{
return _timeZone.getID();
}
}