fn

func DownloadToTempDir(url string) (*os.File, error)

func FileExists(filePath string) bool

func GzipCompress(input []byte) []byte

func GzipDecompress(input []byte) []byte

func IsEmpty(s string) bool

func SaveToWAVFile(filename string, data []byte) (*os.File, error)

func SendFileChunks(file *os.File, firstSize int, chunkSize int, ch chan []byte)

func Ternary[T any](cond bool, trueVal T, falseVal T) T