content: package com.alibou.security.config;
  
  import com.alibou.security.token.TokenRepository;
  import jakarta.servlet.http.HttpServletRequest;
  import jakarta.servlet.http.HttpServletResponse;
  import lombok.RequiredArgsConstructor;
  import org.springframework.security.core.Authentication;
  import org.springframework.security.core.context.SecurityContextHolder;
  import org.springframework.security.web.authentication.logout.LogoutHandler;
  import org.springframework.stereotype.Service;
  
  @Service
  @RequiredArgsConstructor
  public class LogoutService implements LogoutHandler {
  
    private final TokenRepository tokenRepository;
  
    @Override
    public void logout(
        HttpServletRequest request,
        HttpServletResponse response,
        Authentication authentication
    ) {
      final String authHeader = request.getHeader("Authorization");
      final String jwt;
      if (authHeader == null ||!authHeader.startsWith("Bearer ")) {
        return;
      }
      jwt = authHeader.substring(7);
      var storedToken = tokenRepository.findByToken(jwt)
          .orElse(null);
      if (storedToken != null) {
        storedToken.setExpired(true);
        storedToken.setRevoked(true);
        tokenRepository.save(storedToken);
        SecurityContextHolder.clearContext();
      }
    }
  }
  