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zda.go
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zda.go
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package nmea
import (
"fmt"
"time"
)
const (
// TypeZDA type for ZDA sentences
TypeZDA = "ZDA"
)
// ZDA represents date & time data.
// http://aprs.gids.nl/nmea/#zda
type ZDA struct {
BaseSentence
Time Time
Day Int64
Month Int64
Year Int64
OffsetHours Int64 // Local time zone offset from GMT, hours
OffsetMinutes Int64 // Local time zone offset from GMT, minutes
}
// newZDA constructor
func newZDA(s BaseSentence) (ZDA, error) {
p := NewParser(s)
p.AssertType(TypeZDA)
return ZDA{
BaseSentence: s,
Time: p.Time(0, "time"),
Day: p.Int64(1, "day"),
Month: p.Int64(2, "month"),
Year: p.Int64(3, "year"),
OffsetHours: p.Int64(4, "offset (hours)"),
OffsetMinutes: p.Int64(5, "offset (minutes)"),
}, p.Err()
}
// GetDateTime retrieves the date and time in RFC3339Nano format
func (s ZDA) GetDateTime() (string, error) {
if !s.Time.Valid {
return "", fmt.Errorf("value is unavailable")
}
day, err := s.Day.GetValue()
if err != nil {
return "", fmt.Errorf("value is unavailable")
}
month, err := s.Month.GetValue()
if err != nil {
return "", fmt.Errorf("value is unavailable")
}
year, err := s.Year.GetValue()
if err != nil {
return "", fmt.Errorf("value is unavailable")
}
return time.Date(
int(year),
time.Month(month),
int(day),
s.Time.Hour,
s.Time.Minute,
s.Time.Second,
s.Time.Millisecond*1000000,
time.UTC,
).UTC().Format(time.RFC3339Nano), nil
}