flutter web file picker image, audio

flutter_web_file_picker.dart

// ignore: avoid_web_libraries_in_flutter
import 'dart:html' as html;

class MyFile {
  ///@data return a Uint8List of bytes so we can use it in multiparthttp request
  final dynamic data;
  final String name;
  final String dataScheme;
  final int type;

  const MyFile({
      this.dataScheme,
      this.data,
      this.name,
      this.type});
}


//1 for image, 2 for audio
Future<MyFile> filePicker(int type) async {
  final html.FileUploadInputElement input = html.FileUploadInputElement();
  input..accept = type == 1 ? 'image/*' : 'audio/*';
  input.click();
  await input.onChange.first;
  if (input.files.isEmpty) return null;
  final reader = html.FileReader();
  reader.readAsDataUrl(input.files[0]);
  await reader.onLoad.first;
  final encoded = reader.result as String;
  final stripped = type == 1
      ? encoded.replaceFirst(RegExp(r'data:image/[^;]+;base64,'), '')
      : encoded.replaceFirst(RegExp(r'data:audio/[^;]+;base64,'), '');
  final name = input.files?.first?.name;

  return MyFile(data: stripped, dataScheme: encoded, name: name, type: 1);
}