object Utils {
    fun downloadFile(url:String, file:File) : Observable<Int>{
        return PublishSubject.create<Int> {
            val client = OkHttpClient()

            val request = Request.Builder()
                .url(url)
                .build()

            client.newCall(request).enqueue(object : Callback {
                override fun onFailure(call: Call, e: IOException) {
                    e.printStackTrace()
                }

                @Throws(IOException::class)
                override fun onResponse(call: Call, response: Response) {
                    if (!response.isSuccessful) throw IOException("Unexpected code $response")

                    val inStream = response.body()?.byteStream()
                    val bis= BufferedInputStream(inStream)
                    val maxSize=response.body()?.contentLength()
                    val stepSize= maxSize?.div(100)
                    var currentValue=0
                    var procent=0

                    val bytes=ByteArray(2048)
                    val fos = FileOutputStream(file)
                    while (true) {
                        val byteCount = bis.read(bytes)
                        if (byteCount==-1) break
                        fos.write(bytes, 0, byteCount)
                        currentValue+=byteCount
                        if (currentValue>= stepSize!!){
                            procent++
                            it.onNext(procent)
                            currentValue=0
                        }
                    }
                    fos.close()
                }
            })
        }
    }
}









 fun downloadAudio(url:String, fileExternal: File){
        viewState.showLoading()
            Observable.fromCallable {
                val array=url.split("/")
                var nameFile=array[array.size-1]
                nameFile=nameFile.substring(0,nameFile.indexOf("?"))
                val file= File(fileExternal, nameFile)
                val link=""
                Thread.sleep(4000)
                Utils.downloadFile(link, file)
            }
            .doOnNext {
                Log.e("SearchAudioPresenter", "downloadAudio= ASD")
            }
            .subscribeOn(Schedulers.io())
            .observeOn(AndroidSchedulers.mainThread())
            .doFinally { viewState.hideLoading() }
            .subscribe({
                viewState.loadingSuccess()
            }, Throwable::printStackTrace).isDisposed
    }