SecurityFilter.java

package com.exemple.forohub.security;

import com.exemple.forohub.model.Usuario;
import com.exemple.forohub.repository.IUsuarioRepository;
import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import java.io.IOException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;

@Component
public class SecurityFilter extends OncePerRequestFilter {

    private final TokenService tokenService;
    private final IUsuarioRepository usuarioRepo;

    @Autowired
    public SecurityFilter(TokenService tokenService, IUsuarioRepository usuarioRepo) {
        this.tokenService = tokenService;
        this.usuarioRepo = usuarioRepo;
    }

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        String tokenJWT = recuperarToken(request);

        if (tokenJWT != null && tokenService.isValidToken(tokenJWT)) {
            String correoElectronico = tokenService.getSubject(tokenJWT);
            Usuario usuario = (Usuario) usuarioRepo.findByCorreoElectronico(correoElectronico);

            if (usuario != null) {
                UsernamePasswordAuthenticationToken authentication = new UsernamePasswordAuthenticationToken(
                        usuario, null, usuario.getAuthorities());
                authentication.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
                SecurityContextHolder.getContext().setAuthentication(authentication);
            } else {
                // Log: Usuario no encontrado
            }
        } else {
            // Log: Token inválido o nulo
        }

        filterChain.doFilter(request, response);
    }

    private String recuperarToken(HttpServletRequest request) {
        String authorizationHeader = request.getHeader("Authorization");
        if (authorizationHeader != null && authorizationHeader.startsWith("Bearer ")) {
            return authorizationHeader.substring(7);
        }
        return null;
    }
}