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package util
import (
"fmt"
"strconv"
"time"
)
// GetISO8601TimeStamp gets timestamp string in ISO8601 format
func GetISO8601TimeStamp(ts time.Time) string {
t := ts.UTC()
return fmt.Sprintf("%04d-%02d-%02dT%02d:%02d:%02dZ", t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second())
}
const formatISO8601 = "2006-01-02T15:04:05Z"
const jsonFormatISO8601 = `"` + formatISO8601 + `"`
const formatISO8601withoutSeconds = "2006-01-02T15:04Z"
const jsonFormatISO8601withoutSeconds = `"` + formatISO8601withoutSeconds + `"`
// A ISO6801Time represents a time in ISO8601 format
type ISO6801Time time.Time
// New constructs a new iso8601.Time instance from an existing
// time.Time instance. This causes the nanosecond field to be set to
// 0, and its time zone set to a fixed zone with no offset from UTC
// (but it is *not* UTC itself).
func NewISO6801Time(t time.Time) ISO6801Time {
return ISO6801Time(time.Date(
t.Year(),
t.Month(),
t.Day(),
t.Hour(),
t.Minute(),
t.Second(),
0,
time.UTC,
))
}
// IsDefault checks if the time is default
func (it *ISO6801Time) IsDefault() bool {
return *it == ISO6801Time{}
}
// MarshalJSON serializes the ISO6801Time into JSON string
func (it ISO6801Time) MarshalJSON() ([]byte, error) {
return []byte(time.Time(it).Format(jsonFormatISO8601)), nil
}
// UnmarshalJSON deserializes the ISO6801Time from JSON string
func (it *ISO6801Time) UnmarshalJSON(data []byte) error {
str := string(data)
if str == "\"\"" || len(data) == 0 {
return nil
}
var t time.Time
var err error
if str[0] == '"' {
t, err = time.ParseInLocation(jsonFormatISO8601, str, time.UTC)
if err != nil {
t, err = time.ParseInLocation(jsonFormatISO8601withoutSeconds, str, time.UTC)
}
} else {
var i int64
i, err = strconv.ParseInt(str, 10, 64)
if err == nil {
t = time.Unix(i/1000, i%1000)
}
}
if err == nil {
*it = ISO6801Time(t)
}
return err
}
// String returns the time in ISO6801Time format
func (it ISO6801Time) String() string {
return time.Time(it).Format(formatISO8601)
}
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