// GetNetworkByID function returns a network whose ID begins with the given prefix.
// It fails with an error if no matching, or more than one matching, networks are found.
func (daemon *Daemon) GetNetworkByID(partialID string) (libnetwork.Network, error) {
	list := daemon.GetNetworksByID(partialID)

	if len(list) == 0 {
		return nil, libnetwork.ErrNoSuchNetwork(partialID)
	}
	if len(list) > 1 {
		return nil, libnetwork.ErrInvalidID(partialID)
	}
	return list[0], nil
}

// GetNetwork function returns a network for a given string that represents the network and
// a hint to indicate if the string is an Id or Name of the network
func (daemon *Daemon) GetNetwork(idName string, by int) (libnetwork.Network, error) {
	c := daemon.netController
	switch by {
	case NetworkByID:
		list := daemon.GetNetworksByID(idName)

		if len(list) == 0 {
			return nil, libnetwork.ErrNoSuchNetwork(idName)
		}

		if len(list) > 1 {
			return nil, libnetwork.ErrInvalidID(idName)
		}

		return list[0], nil
	case NetworkByName:
		if idName == "" {
			idName = c.Config().Daemon.DefaultNetwork
		}
		return c.NetworkByName(idName)
	}
	return nil, errors.New("unexpected selector for GetNetwork")
}