justguestbook/internal/guestbook/reply.go

package guestbook

import (
	"errors"
	"time"
)

type Reply struct {
	ID      int64  `json:"id,omitempty"`
	Created string `json:"created,omitempty"`
	Message string `json:"message"`
}

func NewReply(entryID int64, message string) (*Reply, error) {
	if message == "" {
		return nil, errors.New("empty reply field")
	}

	return &Reply{
		ID:      entryID,
		Created: time.Now().UTC().Format(DateFormat),
		Message: message}, nil
}