seconds.go

package epoch

import (
	"encoding/json"
	"fmt"
	"time"
)

// Seconds - seconds since the Epoch(Unix time).
// Inherits built-in time.Time type, thus has all it methods, but has custom serializer and
// deserializer(converts integer into built-in time.Time and vice versa).
type Seconds struct {
	time.Time
}

// NewSeconds - returns Seconds
func NewSeconds(t time.Time) Seconds {
	return Seconds{Time: t}
}

// MarshalJSON - implements JSON marshaling interface
func (s Seconds) MarshalJSON() ([]byte, error) {
	return json.Marshal(s.Time.Unix())
}

// UnmarshalJSON - implements JSON unmarshaling interface
func (s *Seconds) UnmarshalJSON(data []byte) error {
	ts, err := parseInt64(string(data))
	if err != nil {
		return fmt.Errorf("failed to parse epoch.Seconds: %w", err)
	}

	s.Time = time.Unix(ts, 0)

	return nil
}