micro/util/time/duration.go

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package time
import (
"encoding/json"
"errors"
"fmt"
"strconv"
"time"
)
type Duration int64
func ParseDuration(s string) (time.Duration, error) {
if s == "" {
return 0, fmt.Errorf(`time: invalid duration "` + s + `"`)
}
var p int
var hours int
loop:
for i, r := range s {
switch r {
case 's', 'm':
break loop
case 'h':
d, err := strconv.Atoi(s[p:i])
if err != nil {
return 0, errors.New("time: invalid duration " + s)
}
hours += d
p = i + 1
case 'd':
d, err := strconv.Atoi(s[p:i])
if err != nil {
return 0, errors.New("time: invalid duration " + s)
}
hours += d * 24
p = i + 1
case 'y':
n, err := strconv.Atoi(s[p:i])
if err != nil {
return 0, errors.New("time: invalid duration " + s)
}
var d int
for j := n - 1; j >= 0; j-- {
d += time.Date(time.Now().Year()+j, time.December, 31, 0, 0, 0, 0, time.Local).YearDay()
}
hours += d * 24
p = i + 1
}
}
return time.ParseDuration(fmt.Sprintf("%dh%s", hours, s[p:]))
}
func (d Duration) MarshalJSON() ([]byte, error) {
return json.Marshal(time.Duration(d).String())
}
func (d *Duration) UnmarshalJSON(b []byte) error {
var v interface{}
if err := json.Unmarshal(b, &v); err != nil {
return err
}
switch value := v.(type) {
case float64:
*d = Duration(time.Duration(value))
return nil
case string:
dv, err := ParseDuration(value)
if err != nil {
return err
}
*d = Duration(dv)
return nil
default:
return fmt.Errorf("invalid duration")
}
}
/*
func (d Duration) MarshalYAML() (interface{}, error) {
return nil, nil
}
func (d Duration) UnmarshalYAML(fn func(interface{}) error) error
*/