user.go

package imapmemserver

import (
	"crypto/subtle"

	"github.com/emersion/go-imap/v2"
	"github.com/emersion/go-imap/v2/imapserver"
)

const mailboxDelim rune = '/'

type namespace = Namespace

type User struct {
	*namespace // default namespace, immutable

	username, password string
}

func NewUser(username, password string) *User {
	return &User{
		namespace: NewNamespace(""),
		username:  username,
		password:  password,
	}
}

func (u *User) Login(username, password string) error {
	if username != u.username {
		return imapserver.ErrAuthFailed
	}
	if subtle.ConstantTimeCompare([]byte(password), []byte(u.password)) != 1 {
		return imapserver.ErrAuthFailed
	}
	return nil
}

func (u *User) Namespace() (*imap.NamespaceData, error) {
	return &imap.NamespaceData{
		Personal: []imap.NamespaceDescriptor{{Delim: mailboxDelim}},
	}, nil
}