package com.sf.config;

import com.sf.util.JwtUtils;
import com.sf.util.UserHolder;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

// 拦截器  要实现HandlerInterceptor接口
// 要作为spring容器的组件
@Component
public class TokenInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtUtils jwtUtils;

    // controller执行之前
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String token = request.getHeader("Authorization");
        if (token != null && !token.equals("null")) {
            Long uid = jwtUtils.parseToken(token, "front");
            System.out.println("用拦截器解析uid: " + uid);
            UserHolder.setUserId(uid);
        }
        return HandlerInterceptor.super.preHandle(request, response, handler);
    }

    // controller执行之后
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("controller执行完成");
        UserHolder.clearUserId();
        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
    }
}