package com.xcong.excoin.configurations.security;

import com.xcong.excoin.common.annotations.UserAuth;
import com.xcong.excoin.modules.member.entity.MemberEntity;
import org.springframework.core.MethodParameter;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;

/**
 * 自动注入登陆用户
 *
 * @author wzy
 * @date 2020-05-13
 **/
public class UserAuthenticationArgumentResolver implements HandlerMethodArgumentResolver {

    @Override
    public boolean supportsParameter(MethodParameter parameter) {
        return parameter.getParameterAnnotation(UserAuth.class) != null && parameter.getParameterType().equals(MemberEntity.class);
    }

    @Override
    public Object resolveArgument(MethodParameter methodParameter, ModelAndViewContainer modelAndViewContainer, NativeWebRequest nativeWebRequest, WebDataBinderFactory webDataBinderFactory) throws Exception {
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        if (authentication == null) {
            return null;
        }

        MemberEntity auth = null;
        if (authentication.getPrincipal() != null) {
            auth = (MemberEntity) authentication.getPrincipal();
        }
        return auth;
    }
}