package fr.plil.sio.web.mvc;
  
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.security.core.context.SecurityContextHolder;
  import org.springframework.security.core.userdetails.UserDetails;
  import org.springframework.stereotype.Service;
  
  @Service
  public class SecurityServiceImpl implements SecurityService{
  
      private static final Logger logger = LoggerFactory.getLogger(SecurityServiceImpl.class);
  
      @Override
      public String findLoggedInUsername() {

          Object userDetails = SecurityContextHolder.getContext().getAuthentication().getPrincipal();

          if (userDetails instanceof UserDetails) {
              return ((UserDetails)userDetails).getUsername();
          }

          logger.warn("cannot find logged user");

          return null;
      }
  }