package epam.legalage;
   
   import java.time.Clock;
   import java.time.LocalDate;
   import java.time.Period;
   import java.util.function.Predicate;
   
   /**
    * A predicate that checks if a user is over 18 years old based on their date of birth.
   */
  public final class LegalAgePredicate implements Predicate<LocalDate> {
  
      private static final int LEGAL_AGE = 18;
      private final Clock clock;
  
      /**
       * Creates a LegalAgePredicate with the system default clock.
       */
      public LegalAgePredicate() {
          this(Clock.systemDefaultZone());
      }
  
      /**
       * Creates a LegalAgePredicate with the specified clock.
       *
       * @param clock the clock to use for calculating the current date
       */
      public LegalAgePredicate(Clock clock) {
          this.clock = clock;
      }
  
      /**
       * Tests if the user with the given date of birth is over 18 years old.
       *
       * @param dateOfBirth the user's date of birth
       * @return true if the user is over 18 years old, false otherwise
       */
      @Override
      public boolean test(LocalDate dateOfBirth) {
          var currentDate = LocalDate.now(clock);
          var age = Period.between(dateOfBirth, currentDate).getYears();
          return age >= LEGAL_AGE;
      }
  }