!7

cm YouTubeDownloader {

  transient JTextArea ta;

  transient JTextField tfURL, tfDest;

  transient JButton btnGo;

  transient File lastFileMade;

  start {

    doEvery(1000, r updateMe);

  }

  visualize {

    tfURL = jtextfield("https://www.youtube.com/watch?v=YYOKMUTTDdA");

    // Full paste

    componentPopupMenu_clear(tfURL);

    componentPopupMenuItem(tfURL, "Paste", r { tfURL.selectAll(); tfURL.paste() });

    tfDest = jtextfield(desktopDir());

    onEnter(tfURL, r go);

    ret northAndCenterWithMargins(

      vstackWithSpacing(

        centerAndEast(withLabel("Video URL to download:", tfURL), 

          withLeftMargin(btnGo = jbutton("Download", r go))),

        withLabel("Destination directory:", tfDest)),

      ta = typeWriterTextArea());

  }

  void unvisualize() { ta = null; }

  void update {

    if (ta != null) setText(ta, localPrintLog());

  }

  void go {

    thread "YouTube Download" {

      temp tempDisableButton(btnGo);

      installOrUpdateYouTubeDL();

      S url = /*formatYouTubeURL_long*/(gtt(tfURL));

      File dir = newFile(gtt(tfDest));

      S output = downloadImpl(url, dir);

      File f = youtubeDLExtractDestination(output);

      if (f != null)

        print("\nMade: " + fileInfo(lastFileMade = f));

      else

        print("\nHmm. Did something go wrong?");

    }

  }

  S downloadImpl(S url, File dir) {

    ret youtubeDownloadVideo(url, dir);

  }

  // API

  File downloadAndReturnFile(S url, File dir) enter {

    ret youtubeDLExtractDestination(downloadImpl(url, dir));

  }

}