package br.ufc.mandacaru.filter;

import java.io.IOException;

import jakarta.servlet.Filter;
import jakarta.servlet.FilterChain;
import jakarta.servlet.FilterConfig;
import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import jakarta.servlet.http.HttpFilter;

/**
 * Servlet Filter implementation class HelloFilter
 */
public class HelloFilter extends HttpFilter implements Filter {

    /**
     * @see HttpFilter#HttpFilter()
     */
    public HelloFilter() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see Filter#destroy()
     */
    public void destroy() {
        // TODO Auto-generated method stub
    }

    /**
     * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
     */
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        // TODO Auto-generated method stub
        response.getWriter();

        // This will print output on console
        System.out.println(
            "Before filter - Preprocessing before servlet");
        String firstName = request.getParameter("first_name");

        if(firstName.equals("almada")) {
            // some authentication if required
            chain.doFilter(request, response);
        } else {
            response.setContentType("text/html");
            response.getWriter().append("Não autorizado");
        }

        // This will print output on console
        System.out.println(
            "After servlet - Following code will execute after running the servlet - PostProcessing");

    }

    /**
     * @see Filter#init(FilterConfig)
     */
    public void init(FilterConfig fConfig) throws ServletException {
        // TODO Auto-generated method stub
    }

}