package fr.plil.sio.web.mvc;
  

  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;

  import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
  

  import javax.annotation.Resource;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  

  public class CheckUserInterceptor extends HandlerInterceptorAdapter {
  
      private static final Logger logger = LoggerFactory.getLogger(CheckUserInterceptor.class);

      @Resource

      private UserSession userSession;
  
      @Override
      public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
              Object handler) throws IOException {
  

          logger.debug("servlet path: " + request.getServletPath());
  
          if (request.getServletPath().equals("/login")) {
              logger.debug("access granted as path is /login");

              return true;
          }
  
          String username = userSession.getUsername();
  
          if (username != null) {

              logger.debug("authenticated");

              return true;
          } else {

              logger.debug("not authenticated");

              response.sendRedirect("login");
              return false;
          }
      }
  
      void setUserSession(UserSession userSession) {
          this.userSession = userSession;
      }
  }