src/main/java/com/example/g8backend/mapper/UserMapper.java

package com.example.g8backend.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.g8backend.entity.User;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

@Mapper
public interface UserMapper extends BaseMapper<User> {
    User getUserByName(@Param("userName") String userName);
    User getUserByEmail(@Param("email") String email);
    User getUserByPasskey(@Param("passkey") String passkey);

    @Select("SELECT * FROM users WHERE user_name = #{name}")
    User selectByUserName(@Param("name") String name);

    @Update("UPDATE users SET user_level = #{userLevel} WHERE user_id = #{userId}")
    int updateUserLevel(@Param("userId") Long userId, @Param("userLevel") String userLevel);

    @Select("SELECT COUNT(*) FROM user_follows WHERE followed_id = #{userId}")
    int countFollowings(Long userId);

    @Select("SELECT COUNT(*) FROM user_follows WHERE follower_id = #{userId}")
    int countFollowers(Long userId);

    @Select("SELECT COUNT(*) FROM user_follows " +
            "WHERE follower_id = #{currentUserId} AND followed_id = #{targetUserId}")
    int existsFollowRelationship(
            @Param("currentUserId") Long currentUserId,
            @Param("targetUserId") Long targetUserId
    );
}