saveMultipleFiles method

@override Future<void> saveMultipleFiles({ List<Uint8List>? dataList, required List<String> fileNameList, required List<String> mimeTypeList, })

Implementation

@override
Future<void> saveMultipleFiles({
  List<Uint8List>? dataList,
  required List<String> fileNameList,
  required List<String> mimeTypeList,
}) async {
  if (dataList!.length != fileNameList.length)
    throw "function saveMultipleFiles: length of 'dataList' is not equal to the length of 'fileNameList'";

  if (dataList.length != mimeTypeList.length)
    throw "function saveMultipleFiles: length of 'dataList' is not equal to the length of 'mimeTypeList'";

  for (var i = 0; i < dataList.length; i++) {
    if (dataList[i].isEmpty)
      throw "function saveMultipleFiles: dataList item cannot be null";
  }

  for (var i = 0; i < mimeTypeList.length; i++) {
    if (mimeTypeList[i].isEmpty)
      throw "function saveMultipleFiles: mimeTypeList item cannot be null";
  }

  var fileNameCount = new Map();
  for (var i = 0; i < fileNameList.length; i++) {
    String? fileName = fileNameList[i];

    if (fileName.length == 0) fileName = "file";

    if (fileNameCount.containsKey(fileName)) {
      fileNameCount[fileName] += 1;
      var extensionIndex = fileName.lastIndexOf('.');
      if (extensionIndex == -1) extensionIndex = fileName.length;

      var extension = '';
      if (extensionIndex < fileName.length)
        extension = fileName.substring(extensionIndex);

      fileName = fileName.substring(0, extensionIndex) +
          '_' +
          fileNameCount[fileName].toString() +
          extension;
    } else {
      fileNameCount[fileName] = 1;
    }

    fileNameList[i] = fileName;
  }

  try {
    await methodChannel.invokeMethod('saveMultipleFiles', {
      "dataList": dataList,
      "fileNameList": fileNameList,
      "mimeTypeList": mimeTypeList
    });
  } on PlatformException {
    rethrow;
  }
}