package usecase.follow;
   
   import common.http.ParameterConverter;
   import common.http.error.JSONError;
   import common.http.interceptor.InterceptableServlet;
   import usecase.auth.AuthorizationConstraints;
   
   import javax.inject.Inject;
   import javax.servlet.ServletException;
  import javax.servlet.annotation.WebServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  
  import static usecase.auth.AuthorizationConstraints.Types.REQUIRE_AUTHENTICATION;
  
  /**
   * Classe che permette di eliminare il follow ad una sezione.
   */
  @WebServlet("/unfollow")
  @AuthorizationConstraints(REQUIRE_AUTHENTICATION)
  class UnfollowServlet extends InterceptableServlet {
      @Inject private FollowService service;
  
      @Override
      @JSONError
      protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          ParameterConverter converter = new ParameterConverter(request);
          int sectionId = converter.getIntParameter("section").orElse(0);
          service.unFollow(sectionId);
      }
  
      @Override
      @JSONError
      protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          doGet(request, response);
      }
  }