storage

type Storage interface {
	Shutdown()

	InsertOrUpdateUser(user *model.User) error
	DeleteUser(username string) error
	FetchUser(username string) (*model.User, error)
	UserExists(username string) (bool, error)

	InsertOrUpdateRosterItem(ri *model.RosterItem) error
	DeleteRosterItem(user, contact string) error
	FetchRosterItems(user string) ([]model.RosterItem, error)
	FetchRosterItem(user, contact string) (*model.RosterItem, error)

	InsertOrUpdateRosterNotification(rn *model.RosterNotification) error
	DeleteRosterNotification(user, contact string) error
	FetchRosterNotifications(contact string) ([]model.RosterNotification, error)

	InsertOrUpdateVCard(vCard xml.Element, username string) error
	FetchVCard(username string) (xml.Element, error)

	FetchPrivateXML(namespace string, username string) ([]xml.Element, error)
	InsertOrUpdatePrivateXML(privateXML []xml.Element, namespace string, username string) error

	InsertOfflineMessage(message xml.Element, username string) error
	CountOfflineMessages(username string) (int, error)
	FetchOfflineMessages(username string) ([]xml.Element, error)
	DeleteOfflineMessages(username string) error
}