/**
 * MP注入處理器
 *
 * @author 
 * @date 2021/4/25
 */
@Slf4j
public class CreateAndUpdateMetaObjectHandler implements MetaObjectHandler {
    @Override
    public void insertFill(MetaObject metaObject) {
        try {
            if (ObjectUtil.isNotNull(metaObject) && metaObject.getOriginalObject() instanceof BaseEntity) {
                BaseEntity baseEntity = (BaseEntity) metaObject.getOriginalObject();//獲得當(dāng)前要進(jìn)行sql操作的實(shí)體類
                Date current = ObjectUtil.isNotNull(baseEntity.getCreateTime())
                    ? baseEntity.getCreateTime() : new Date();
                baseEntity.setCreateTime(current);
                baseEntity.setUpdateTime(current);
                String username = StringUtils.isNotBlank(baseEntity.getCreateBy())
                    ? baseEntity.getCreateBy() : getLoginUsername();
                // 當(dāng)前已登錄 且 創(chuàng)建人為空 則填充
                baseEntity.setCreateBy(username);
                // 當(dāng)前已登錄 且 更新人為空 則填充
                baseEntity.setUpdateBy(username);
            }
        } catch (Exception e) {
            throw new ServiceException("自動(dòng)注入異常 => " + e.getMessage(), HttpStatus.HTTP_UNAUTHORIZED);
        }
    }
    @Override
    public void updateFill(MetaObject metaObject) {
        try {
            if (ObjectUtil.isNotNull(metaObject) && metaObject.getOriginalObject() instanceof BaseEntity) {
                BaseEntity baseEntity = (BaseEntity) metaObject.getOriginalObject();//獲得當(dāng)前要進(jìn)行sql操作的實(shí)體類
                Date current = new Date();
                // 更新時(shí)間填充(不管為不為空)
                baseEntity.setUpdateTime(current);
                String username = getLoginUsername();
                // 當(dāng)前已登錄 更新人填充(不管為不為空)
                if (StringUtils.isNotBlank(username)) {
                    baseEntity.setUpdateBy(username);
                }
            }
        } catch (Exception e) {
            throw new ServiceException("自動(dòng)注入異常 => " + e.getMessage(), HttpStatus.HTTP_UNAUTHORIZED);
        }
    }
    /**
     * 獲取登錄用戶名
     */
    private String getLoginUsername() {
        LoginUser loginUser;
        try {
            loginUser = LoginHelper.getLoginUser();
        } catch (Exception e) {
            log.warn("自動(dòng)注入警告 => 用戶未登錄");
            return null;
        }
        return ObjectUtil.isNotNull(loginUser) ? loginUser.getUsername() : null;
    }
}

/**
 * Entity基類
 *
 * @author
 */
@Data
public class BaseEntity implements Serializable {
    private static final long serialVersionUID = 1L;
    /**
     * 搜索值
     */
    @JsonIgnore
    @TableField(exist = false)
    private String searchValue;
    /**
     * 創(chuàng)建者
     */
    @TableField(fill = FieldFill.INSERT) //創(chuàng)建時(shí)自動(dòng)填充
    private String createBy;
    /**
     * 創(chuàng)建時(shí)間
     */
    @TableField(fill = FieldFill.INSERT)
    private Date createTime;
    /**
     * 更新者
     */
    @TableField(fill = FieldFill.INSERT_UPDATE) //創(chuàng)建 or 修改時(shí)自動(dòng)填充
    private String updateBy;
    /**
     * 更新時(shí)間
     */
    @TableField(fill = FieldFill.INSERT_UPDATE)
    private Date updateTime;
    /**
     * 請(qǐng)求參數(shù)
     */
    @JsonInclude(JsonInclude.Include.NON_EMPTY)
    @TableField(exist = false)
    private Map<String, Object> params = new HashMap<>();
}