001/*
002 * (C) Copyright 2012 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors: Sun Seng David TAN <[email protected]>
017 */
018package org.nuxeo.ecm.user.center.profile;
019
020import java.io.Serializable;
021import java.util.ArrayList;
022import java.util.Collections;
023import java.util.Comparator;
024import java.util.List;
025import java.util.TimeZone;
026
027import javax.faces.model.SelectItem;
028
029import org.apache.commons.lang3.StringUtils;
030import org.jboss.seam.ScopeType;
031import org.jboss.seam.annotations.In;
032import org.jboss.seam.annotations.Name;
033import org.jboss.seam.annotations.Scope;
034import org.jboss.seam.international.LocaleSelector;
035import org.jboss.seam.international.TimeZoneSelector;
036
037/**
038 * Provide from the system available timezones to be displayed in UI.
039 *
040 * @since 5.6
041 */
042@Scope(ScopeType.SESSION)
043@Name("timeZones")
044public class TimeZones implements Serializable {
045
046    private static final long serialVersionUID = 1L;
047
048    @In
049    protected LocaleSelector localeSelector;
050
051    private List<SelectItem> timeZoneSelectItems = null;
052
053    public List<SelectItem> getTimeZones() {
054        if (timeZoneSelectItems == null) {
055            initTimeZones();
056        }
057        return timeZoneSelectItems;
058    }
059
060    public String displayCurrentTimeZone() {
061        TimeZoneSelector tzs = TimeZoneSelector.instance();
062        String timeZoneId = tzs.getTimeZoneId();
063        if (StringUtils.isEmpty(timeZoneId)) {
064            TimeZone timeZone = tzs.getTimeZone();
065            if (timeZone != null) {
066                timeZoneId = timeZone.getID();
067            }
068        }
069        return displayTimeZone(timeZoneId);
070    }
071
072    public String displayTimeZone(String id) {
073        if (id == null || id.trim().length() == 0 || "none".equals(id)) {
074            return "";
075        }
076        return id + " - " + TimeZone.getTimeZone(id).getDisplayName(localeSelector.getLocale());
077    }
078
079    private void initTimeZones() {
080        timeZoneSelectItems = new ArrayList<SelectItem>();
081        final String[] timeZoneIds = TimeZone.getAvailableIDs();
082        for (final String id : timeZoneIds) {
083            timeZoneSelectItems.add(new SelectItem(id, displayTimeZone(id)));
084        }
085        Collections.sort(timeZoneSelectItems, new Comparator<SelectItem>() {
086            @Override
087            public int compare(SelectItem o1, SelectItem o2) {
088                return ((String) o1.getValue()).compareTo((String) o2.getValue());
089            }
090        });
091    }
092}