package com.sqx.common.utils;

import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;

import java.util.Date;
import java.util.Objects;

@Component
@Slf4j
public class MetaObjectHandler implements com.baomidou.mybatisplus.core.handlers.MetaObjectHandler {

    /**
     * 插入操作时自动填充
     * createTime 和 updateTime 必须是Date类型的字段
     *
     * @param metaObject
     */
    @Override
    public void insertFill(MetaObject metaObject) {
        Object createTime = getFieldValByName("createTime", metaObject);
        if (Objects.isNull(createTime)) {
            //只有被FieldFill标记的字段才会执行自动填充
            setInsertFieldValByName("createTime", new Date(), metaObject);
        }
        Object updateTime = getFieldValByName("updateTime", metaObject);
        if (Objects.isNull(updateTime)) {
            setInsertFieldValByName("updateTime", new Date(), metaObject);
        }
    }

    /**
     * 更新操作时自动填充
     *
     * @param metaObject
     */
    @Override
    public void updateFill(MetaObject metaObject) {
        Object updateTime = getFieldValByName("updateTime", metaObject);
        if (Objects.isNull(updateTime)) {
            //只有被FieldFill标记的字段才会执行自动填充
            setUpdateFieldValByName("updateTime", new Date(), metaObject);
        }
    }
}