content: /*
   * Copyright (C) 2016 The Android Open Source Project
   *
   * 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.
   */
  
  package com.android.server.twilight;
  
  import android.text.format.DateFormat;
  
  import java.time.Instant;
  import java.time.LocalDateTime;
  import java.time.ZoneId;
  import java.util.TimeZone;
  
  /**
   * The twilight state, consisting of the sunrise and sunset times (in millis) for the current
   * period.
   * <p/>
   * Note: This object is immutable.
   */
  public final class TwilightState {
  
      private final long mSunriseTimeMillis;
      private final long mSunsetTimeMillis;
  
      public TwilightState(long sunriseTimeMillis, long sunsetTimeMillis) {
          mSunriseTimeMillis = sunriseTimeMillis;
          mSunsetTimeMillis = sunsetTimeMillis;
      }
  
      /**
       * Returns the time (in UTC milliseconds from epoch) of the upcoming or previous sunrise if
       * it's night or day respectively.
       */
      public long sunriseTimeMillis() {
          return mSunriseTimeMillis;
      }
  
      /**
       * Returns a new {@link LocalDateTime} instance initialized to {@link #sunriseTimeMillis()}.
       */
      public LocalDateTime sunrise() {
          final ZoneId zoneId = TimeZone.getDefault().toZoneId();
          return LocalDateTime.ofInstant(Instant.ofEpochMilli(mSunriseTimeMillis), zoneId);
      }
  
      /**
       * Returns the time (in UTC milliseconds from epoch) of the upcoming or previous sunset if
       * it's day or night respectively.
       */
      public long sunsetTimeMillis() {
          return mSunsetTimeMillis;
      }
  
      /**
       * Returns a new {@link LocalDateTime} instance initialized to {@link #sunsetTimeMillis()}.
       */
      public LocalDateTime sunset() {
          final ZoneId zoneId = TimeZone.getDefault().toZoneId();
          return LocalDateTime.ofInstant(Instant.ofEpochMilli(mSunsetTimeMillis), zoneId);
      }
  
      /**
       * Returns {@code true} if it is currently night time.
       */
      public boolean isNight() {
          final long now = System.currentTimeMillis();
          return now >= mSunsetTimeMillis && now < mSunriseTimeMillis;
      }
  
      @Override
      public boolean equals(Object o) {
          return o instanceof TwilightState && equals((TwilightState) o);
      }
  
      public boolean equals(TwilightState other) {
          return other != null
                  && mSunriseTimeMillis == other.mSunriseTimeMillis
                  && mSunsetTimeMillis == other.mSunsetTimeMillis;
      }
  
      @Override
      public int hashCode() {
          return Long.hashCode(mSunriseTimeMillis) ^ Long.hashCode(mSunsetTimeMillis);
      }
  
      @Override
      public String toString() {
          return "TwilightState {"
                  + " sunrise=" + DateFormat.format("MM-dd HH:mm", mSunriseTimeMillis)
                  + " sunset="+ DateFormat.format("MM-dd HH:mm", mSunsetTimeMillis)
                  + " }";
      }
  }
  