onasty @ f469c123670381a7a6a29594a92df0a5db9f75df

package models

import (

	"errors"

	"regexp"

	"time"

	"github.com/gofrs/uuid/v5"

)

// read and unread are not allowed because those slugs might and will be interpreted as api routes

var notAllowedSlugs = map[string]struct{}{

	"read":   {},

	"unread": {},

}

var (

	ErrNoteContentIsEmpty     = errors.New("note: content is empty")

	ErrNoteSlugIsAlreadyInUse = errors.New("note: slug is already in use")

	ErrNoteSlugIsInvalid      = errors.New("note: slug is invalid")

	ErrNoteExpired            = errors.New("note: expired")

	ErrNoteNotFound           = errors.New("note: not found")

)

type Note struct {

	ID                   uuid.UUID

	Content              string

	Slug                 string

	Password             string

	BurnBeforeExpiration bool

	ReadAt               time.Time

	CreatedAt            time.Time

	ExpiresAt            time.Time

}

var slugPattern = regexp.MustCompile(`^[a-zA-Z0-9_-]+$`)

func (n Note) Validate() error {

	if n.Content == "" {

		return ErrNoteContentIsEmpty

	}

	if !slugPattern.MatchString(n.Slug) {

		return ErrNoteSlugIsInvalid

	}

	if n.IsExpired() {

		return ErrNoteExpired

	}

	if _, exists := notAllowedSlugs[n.Slug]; exists {

		return ErrNoteSlugIsAlreadyInUse

	}

	return nil

}

func (n Note) IsExpired() bool {

	return !n.ExpiresAt.IsZero() &&

		n.ExpiresAt.Before(time.Now())

}

func (n Note) ShouldBeBurnt() bool {

	return !n.ExpiresAt.IsZero() &&

		n.BurnBeforeExpiration

}

func (n Note) IsRead() bool {

	return !n.ReadAt.IsZero()

}