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      1 /*
      2  * Copyright (C) 2018 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.settings.datetime.timezone.model;
     18 
     19 import libcore.util.CountryTimeZones;
     20 
     21 import java.util.Collections;
     22 import java.util.List;
     23 import java.util.stream.Collectors;
     24 
     25 /**
     26  * Wrap {@class CountryTimeZones} to filter time zone that are shown in the picker.
     27  */
     28 public class FilteredCountryTimeZones {
     29 
     30     // New timezone list and the meta data of time zone, notUsedAfter, is introduced in Android P
     31     // in 2018. Only show time zone used in or after 2018.
     32     private static final long MIN_USE_DATE_OF_TIMEZONE = 1514764800000L; // 1/1/2018 00:00 UTC
     33 
     34     private final CountryTimeZones mCountryTimeZones;
     35     private final List<String> mTimeZoneIds;
     36 
     37     public FilteredCountryTimeZones(CountryTimeZones countryTimeZones) {
     38         mCountryTimeZones = countryTimeZones;
     39         List<String> timeZoneIds = countryTimeZones.getTimeZoneMappings().stream()
     40                 .filter(timeZoneMapping ->
     41                         timeZoneMapping.showInPicker && (timeZoneMapping.notUsedAfter == null
     42                                 || timeZoneMapping.notUsedAfter >= MIN_USE_DATE_OF_TIMEZONE))
     43                 .map(timeZoneMapping -> timeZoneMapping.timeZoneId)
     44                 .collect(Collectors.toList());
     45         mTimeZoneIds = Collections.unmodifiableList(timeZoneIds);
     46     }
     47 
     48     public List<String> getTimeZoneIds() {
     49         return mTimeZoneIds;
     50     }
     51 
     52     public CountryTimeZones getCountryTimeZones() {
     53         return mCountryTimeZones;
     54     }
     55 
     56     public String getRegionId() {
     57         return TimeZoneData.normalizeRegionId(mCountryTimeZones.getCountryIso());
     58     }
     59 }
     60