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secondtime.go
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secondtime.go
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/**
@Author: wei-g
@Date: 2020/11/25 3:01 下午
@Description: 简化时间序列化操作等有关处理
*/
// 本文件部分代码实现借鉴 https://www.liwenzhou.com/posts/Go/json_tricks_in_go/#autoid-0-0-12
package simpletime
import (
"database/sql/driver"
"fmt"
"strings"
"time"
"github.com/go-playground/validator/v10"
)
const (
SecondTimeLayout = "2006-01-02 15:04:05 MST" // 精确到秒,带时区信息
//TimeLayoutNano = "2006-01-02 15:04:05.000000000 MST" // 精确到毫秒,带时区信息
ValidatorSecondTimeTag = "formatSecondTime" // validator 注册 字段基本的tag名
)
// SecondTime 精确到秒的时间序列化
type SecondTime time.Time
// UnmarshalJSON json 反序列化接口
func (s *SecondTime) UnmarshalJSON(b []byte) (err error) {
data := strings.Trim(string(b), `"`)
if data == "null" {
*s = SecondTime(time.Time{})
return
}
var now time.Time
if now, err = time.Parse(SecondTimeLayout, data); err != nil {
return
}
*s = SecondTime(now)
return
}
// MarshalJSON json 序列化接口
func (s *SecondTime) MarshalJSON() (data []byte, err error) {
if time.Time(*s).IsZero() {
return []byte("null"), nil
}
return []byte(fmt.Sprintf(`"%s"`, time.Time(*s).Format(SecondTimeLayout))), nil
}
// IsSet 判断Time是否为正确设置
func (s *SecondTime) IsSet() bool {
return !time.Time(*s).IsZero()
}
// Value 满足 database/sql 库要求
func (s SecondTime) Value() (driver.Value, error) {
return time.Time(s), nil
}
// Parse parses a formatted string and returns the time value it represents.
func Parse(value string) (secondTime SecondTime, err error) {
var (
t time.Time
)
if t, err = time.Parse(SecondTimeLayout, value); err != nil {
return
}
secondTime = SecondTime(t)
return
}
func CheckSecondTimeFunc(fl validator.FieldLevel) bool {
value := strings.Trim(fl.Field().String(), `"`)
_, err := time.Parse(SecondTimeLayout, value)
if err != nil {
return false
}
return true
}