justguestbook/guestbook.go

package guestbook

import (
	"errors"
	"time"
)

const DateFormat = "2006-01-02 15:04:05"

type Reply struct {
	ID      int64     `json:"-"`
	Created time.Time `json:"created,omitempty"`
	Message string    `json:"message"`
}

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

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

type Entry struct {
	ID          int64     `json:"entry_id"`
	Created     time.Time `json:"created"`
	Name        string    `json:"name"`
	Website     string    `json:"website,omitempty"`
	HideWebsite bool      `json:"hide_website,omitempty"`
	Message     string    `json:"message"`
	Reply       *Reply    `json:"reply,omitempty"`
}

func NewEntry(name, message, website string, hideWebsite bool) (*Entry, error) {
	if name == "" || message == "" {
		return nil, errors.New("name and message field are required")
	}

	return &Entry{
		Created:     time.Now().UTC(),
		Name:        name,
		Website:     website,
		HideWebsite: hideWebsite,
		Message:     message}, nil
}

type Guestbook interface {
	Entries(page, pageSize int64) ([]*Entry, error)
	Count() (int64, error)
	NewEntry(entry *Entry) error
	EditEntry(entry *Entry) error
	DeleteEntry(entryID int64) error
	NewReply(reply *Reply) error
	EditReply(reply *Reply) error
	DeleteReply(entryID int64) error
	Close() error
}