basic

type Notify interface {
	// Done returns a channel that's closed when work done.
	Done() <-chan struct{}

	// Result returns the NotifyResult and only valid after Done channel is closed.
	Result() NotifyResult
}

type NotifyResult interface {
	Success() bool
	Error() error
	Data() interface{}
}

type RangeRequest interface {
	URL() string
	Offset() int64
	Size() int64
	Header() map[string]string

	// Extra gets the extra info.
	Extra() interface{}
}

type Response interface {
	Success() bool
	Data() interface{}
}

type SchedulePeerInfo struct {
	// basic peer info
	*types.PeerInfo
	// Path represents the path to get resource from the peer.
	Path string
}

type SchedulePieceDataResult struct {
	Off  int64
	Size int64

	// PeerInfos represents the schedule peers which to get the range data.
	PeerInfos []*SchedulePeerInfo
}