overflow_commons_go/util/timestamp.go

package util

import (
	"fmt"
	"strconv"
	"time"
)

type Timestamp time.Time

func (t Timestamp) MarshalJSON() ([]byte, error) {
	ts := time.Time(t).Unix()
	stamp := fmt.Sprint(ts * 1000)
	return []byte(stamp), nil
}

func (t *Timestamp) UnmarshalJSON(b []byte) error {
	ts, err := strconv.Atoi(string(b))
	if err != nil {
		return err
	}
	*t = Timestamp(time.Unix(int64(ts)/1000, 0))

	return nil
}

func (t Timestamp) String() string {
	return time.Time(t).String()
}

func Now() Timestamp {
	return Timestamp(time.Now())
}

func Date(year int, month time.Month, day int) Timestamp {
	return Timestamp(time.Date(year, month, day, 0, 0, 0, 0, time.UTC))
}