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datetime.go
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/
datetime.go
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package common
import (
"encoding/binary"
"encoding/json"
"errors"
"hash"
"time"
)
// TsLayout is the layout to be used in the timestamp marshaling/unmarshaling everywhere.
// The timezone must always be UTC.
const TsLayout = "2006-01-02T15:04:05.000Z"
// Time is an abstraction for the time.Time type
type Time time.Time
// MarshalJSON implements json.Marshaler interface.
// The time is a quoted string in the JsTsLayout format.
func (t Time) MarshalJSON() ([]byte, error) {
return json.Marshal(time.Time(t).UTC().Format(TsLayout))
}
// UnmarshalJSON implements js.Unmarshaler interface.
// The time is expected to be a quoted string in TsLayout
// format.
func (t *Time) UnmarshalJSON(data []byte) (err error) {
if data[0] != []byte(`"`)[0] || data[len(data)-1] != []byte(`"`)[0] {
return errors.New("Not quoted")
}
*t, err = ParseTime(string(data[1 : len(data)-1]))
return
}
func (t Time) Hash32(h hash.Hash32) error {
err := binary.Write(h, binary.LittleEndian, time.Time(t).UnixNano())
return err
}
// ParseTime parses a time in the TsLayout format.
func ParseTime(timespec string) (Time, error) {
t, err := time.Parse(TsLayout, timespec)
return Time(t), err
}
// MustParseTime is a convenience equivalent of the ParseTime function
// that panics in case of errors.
func MustParseTime(timespec string) Time {
ts, err := ParseTime(timespec)
if err != nil {
panic(err)
}
return ts
}