content: /*
   * LibertyBans
   * Copyright © 2021 Anand Beh
   *
   * LibertyBans is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Affero General Public License as
   * published by the Free Software Foundation, either version 3 of the
   * License, or (at your option) any later version.
   *
   * LibertyBans 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. See the
   * GNU Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with LibertyBans. If not, see <https://www.gnu.org/licenses/>
   * and navigate to version 3 of the GNU Affero General Public License.
   */
  
  package space.arim.libertybans.core.service;
  
  import com.github.benmanes.caffeine.cache.Ticker;
  
  import java.time.Clock;
  import java.time.Instant;
  import java.time.ZoneId;
  import java.time.ZoneOffset;
  
  /**
   * Timer which is very similar to {@link Clock}
   *
   */
  public interface Time {
  
  	/**
  	 * Retrieves the current time in seconds
  	 *
  	 * @return the current time
  	 */
  	long currentTime();
  
  	/**
  	 * Retrieves the current timestamp
  	 *
  	 * @return the current timestamp
  	 */
  	default Instant currentTimestamp() {
  		return Instant.ofEpochSecond(currentTime());
  	}
  
  	/**
  	 * Retrieves the number of nanoseconds since some fixed, arbitrary point in time
  	 *
  	 * @return the nanoseconds which have passed
  	 */
  	long arbitraryNanoTime();
  
  	default Ticker toCaffeineTicker() {
  		return this::arbitraryNanoTime;
  	}
  
  	default Clock toJdkClock() {
  		return new Clock() {
  			@Override
  			public ZoneId getZone() {
  				return ZoneOffset.UTC;
  			}
  
  			@Override
  			public Clock withZone(ZoneId zoneId) {
  				throw new UnsupportedOperationException();
  			}
  
  			@Override
  			public Instant instant() {
  				return Time.this.currentTimestamp();
  			}
  		};
  	}
  }
  