mediocre-go-lib/mtime/dur.go
2018-01-11 20:26:27 +00:00

43 lines
1.0 KiB
Go

package mtime
import (
"encoding/json"
"time"
)
// Duration wraps time.Duration to implement marshaling and unmarshaling methods
type Duration struct {
time.Duration
}
// MarshalText implements the text.Marshaler interface
func (d Duration) MarshalText() ([]byte, error) {
return []byte(d.Duration.String()), nil
}
// UnmarshalText implements the text.Unmarshaler interface
func (d *Duration) UnmarshalText(b []byte) error {
var err error
d.Duration, err = time.ParseDuration(string(b))
return err
}
// MarshalJSON implements the json.Marshaler interface, marshaling the Duration
// as a json string via Duration's String method
func (d Duration) MarshalJSON() ([]byte, error) {
return json.Marshal(d.String())
}
// UnmarshalJSON implements the json.Unmarshaler interface, unmarshaling the
// Duration as a JSON string and using the time.ParseDuration function on that
func (d *Duration) UnmarshalJSON(b []byte) error {
var s string
err := json.Unmarshal(b, &s)
if err != nil {
return err
}
d.Duration, err = time.ParseDuration(s)
return err
}