resource

type ChapterResource interface {
	Resourcer
	Chapters() []Resourcer
}

type Definition string

type MP3 struct {
	ID          int
	FileName    string
	SavePath    string
	Playable    bool
	DownloadUrl string
	Tag         Tag
	Origin      int
}

type MP3ChapterResource interface {
	Resourcer
	Chapters() []Mp3Resource
}

type Mp3Resource interface {
	Resourcer
	MP3() *MP3
}

type Resourcer interface {
	Title() string
	Reader() (int64, io.ReadCloser, error)
}

type Resourcer2 interface {
	Title() string
	Reader2() (func() int64, io.ReadCloser, error)
}

type ResourcerAfterTrigger interface {
	Trigger(file string) (string, error)
}

type Specification struct {
	Size       int64      `json:"size"`
	Definition Definition `json:"definition"`
	URL        string     `json:"url"`
}

type SpecificationList []*Specification

type Tag struct {
	Title      string
	Artist     string
	Album      string
	Year       string
	Track      string
	CoverImage string
}

type URLCombineOption struct {
	Callback func(url string, data []byte) []byte
	Sep      []byte
}