download

type Config struct {
	OutputDir      string
	Parallel       int
	CheckDiskSpace bool
	MinFreeSpaceGB int
	MaxRetries     int
}

type DownloadError struct {
	URL   string
	Error string
}

type Downloader struct {

	// OnProgress is called periodically during downloads if set.
	// Arguments: filename, bytesWritten, totalBytes (-1 if unknown).
	OnProgress func(filename string, written, total int64)
	// contains filtered or unexported fields
}

type FileTask struct {
	URL      string
	Filename string // saved as this name; falls back to filepath.Base(URL)
	MD5      string // expected MD5 hex digest; empty to skip verification
}

type Manifest struct {
	Query      string    `json:"query"`
	Timestamp  time.Time `json:"timestamp"`
	Total      int       `json:"total_files"`
	Completed  int       `json:"completed"`
	Failed     int       `json:"failed"`
	TotalBytes int64     `json:"total_bytes"`
}

type Result struct {
	Total     int
	Completed int
	Failed    int
	Bytes     int64
	Errors    []DownloadError
}