download method

@override void download({ String? url, File? file, void onReceiveProgress(int received, int total, bool failed)?, void onDone()?, })

Implementation

@override
void download({
  String? url,
  File? file,
  void Function(int received, int total, bool failed)? onReceiveProgress,
  void Function()? onDone,
}) async {
  if (status != UpgradeStatus.available) {
    debugPrint("[UpgradeManager] The update is not available.");
    return;
  }

  final uri = Uri.parse(url ?? fileURL);

  state.updateUpgradeStatus(status: UpgradeStatus.downloading);

  final StreamedResponse response = await Client().send(Request('GET', uri));
  final contentLength = response.contentLength ?? 1;

  List<int> buffer = [];

  response.stream.listen((bytes) async {
    buffer.addAll(bytes);
    onReceiveProgress?.call(buffer.length, contentLength, false);
  },
    onDone: () async {
      file ??= await defaultFileLocation(uri.pathSegments.last);
      await file!.writeAsBytes(buffer);
      filePath = file!.absolute.path;
      state.updateUpgradeStatus(status: UpgradeStatus.readyToInstall);
      onReceiveProgress?.call(contentLength, contentLength, false);
      onDone?.call();
    },
    onError: (e) {
      onReceiveProgress?.call(buffer.length, contentLength, true);
      state.updateUpgradeStatus(status: UpgradeStatus.error);
      debugPrint("[UpgradeManager] Downloading Error: ${e.toString()}");
    },
    cancelOnError: true,
  );
}