client

type BaseDownloadTask struct {
	Url      string
	Filename string
	SavePath string
	Paused   bool
}

type Client interface {
	GetStatus() (Status, error)
	GetConfig() *config.ClientConfig
	Add(DownloadTask) (id string, err error) // Return created download id
	Get(id string) (download Download, err error)
	Delete(id string) error
	Pause(id string) error
	Resume(id string) error // Note it will throw an error if task state is "error"
	GetAll() (Downloads, error)
	ChangeUrl(id string, url string) error
}

type Download interface {
	Id() string // download task id in client
	Filename() string
	Size() int64
	SavePath() string
	Status() string // downloading|paused|completed|error|deleted|unknown
	Msg() string
}

type DownloadTask interface {
	GetUrl() string
	GetFilename() string // "foobar.rar"
	GetSavePath() string // "/root/Downloads"
	GetPaused() bool     // add task in paused state
}

type Downloads map[string]Download

type RegInfo struct {
	Name    string
	Creator func(string, *config.ClientConfig, *config.Config) (Client, error)
}

type Status interface {
	DownloadSpeed() int64
}