Download story

download.dart

downloadAudioFile(MuseumObject object) async {
    var size = object.media!.mediaSize ?? 0;
    var fileSize = (object.media!.mediaSize! / 1000000).toStringAsPrecision(3);

    var result = await Get.defaultDialog(
      title: '',
      middleText:
          'You are about to download ${fileSize}MB of data. Do you want to continue?',
      onCancel: () {
        Navigator.of(context).pop(false);
      },
      onConfirm: () {
        Get.back(result: true);
      },
      buttonColor: Color(0xffFC0606),
      confirmTextColor: Colors.white,
      cancelTextColor: Color(0xffFC0606),
    );

    if (result != null && result == true) {
      PermissionStatus status = await Permission.storage.request();
      print('is status granted: ${status.isGranted}');
      if (status.isGranted) {
        var dir = await getApplicationDocumentsDirectory();
        print(dir);

        String? filePath = '${dir.path}/${object.id}-object.mp3';
        print(filePath);

        // check if invoice exist before downloading
        bool isExist = await checkIfFileExist(filePath);
        print('does file exist:: ${isExist}');

        if (!isExist) {
          final response = await _downloadObject(object);
          if (response == null) {
            return;
          }

          if (response.statusCode == 200) {
            // add to downloads list
            object.filePath = filePath;
            object.fileName = '${object.id}-object.mp3';
            //Provider.of<MuseumProvider>(context, listen: false).
            List<MuseumObject>? objects =
                await SharedPrefs.instance.retrieveSavedObjects();
            objects ??= [];
            objects.add(object);
            SharedPrefs.instance.saveDownload(objects);
            return;
          }
        } else {
          /*object.filePath = filePath;
            object.fileName = '${object.id}-object.mp3';
            //Provider.of<MuseumProvider>(context, listen: false).
            List<MuseumObject>? objects = await SharedPrefs.instance.retrieveSavedObjects();
            objects ??= [];
            objects.add(object);
            SharedPrefs.instance.saveDownload(objects);*/
        }
      }
    }
  }

  Future<dynamic> _downloadObject(MuseumObject object) async {
    di.Dio dio = di.Dio();
    try {
      var dir = await getApplicationDocumentsDirectory();
      print(dir);

      showInfoToast('Downloading file. Please wait...');

      di.Response response = await dio.download(
          object.media!.audioUrl!, '${dir.path}/${object.id}-object.mp3',
          onReceiveProgress: (rec, total) {
        setState(() {
          _downloading = true;
          _progress = ((rec / total) * 100).toInt();
          //_progressString = ((rec / total) * 100).toStringAsFixed(0) + "%";
          print('download progress:::: $_progress');

          if (_progress == 100) {
            showInfoToast('file download done.');
            _progress = 0;
            _downloading = false;
            /*if (_progressString == "100%") {
                Scaffold.of(context)
                    .showSnackBar(SnackBar(content: Text("Next Action...")));
                // NextAction();*/
          }
        });
      });

      return response;
    } catch (exp) {
      showErrorToast(exp.toString());
      return null;
    }
  }