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TimeZoneResolver.java
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75 lines (65 loc) · 2.27 KB
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package act.i18n;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2017 ActFramework
* %%
* 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.
* #L%
*/
import act.apidoc.Description;
import act.controller.Controller;
import org.osgl.http.H;
import org.osgl.mvc.annotation.PostAction;
import org.osgl.util.S;
import java.util.Calendar;
@SuppressWarnings("unused")
public class TimeZoneResolver extends Controller.Util {
public static final String SESSION_KEY = "__tz__";
@PostAction("i18n/timezone")
@Description("Set timezone into session. The value should be offset to UTC in minutes")
public static void updateTimezoneOffset(
@Description("the timezone offset to UTC in minutes") int offset,
H.Session session
) {
session.put(SESSION_KEY, offset);
}
/**
* Returns timezone offset from {@link H.Session#current() current session}.
*
* @return the offset to UTC time in minutes
*/
public static int timezoneOffset() {
return timezoneOffset(H.Session.current());
}
/**
* Returns timezone offset from a session instance. The offset is
* in minutes to UTC time
*
* @param session
* the session instance
* @return the offset to UTC time in minutes
*/
public static int timezoneOffset(H.Session session) {
String s = null != session ? session.get(SESSION_KEY) : null;
return S.notBlank(s) ? Integer.parseInt(s) : serverTimezoneOffset();
}
public static int serverTimezoneOffset() {
Calendar cal = Calendar.getInstance();
return -(cal.get(Calendar.ZONE_OFFSET) + cal.get(Calendar.DST_OFFSET)) / (1000 * 60);
}
public static void main(String[] args) {
System.out.println(serverTimezoneOffset());
}
}