fluffychat/lib/utils/matrix_sdk_extensions.dart/matrix_file_extension.dart

import 'dart:io';

import 'package:matrix/matrix.dart';
import 'package:fluffychat/utils/platform_infos.dart';
import 'package:flutter/material.dart';
import 'package:path_provider/path_provider.dart';
import 'package:file_picker_cross/file_picker_cross.dart';
import 'package:share/share.dart';
import 'package:flutter_gen/gen_l10n/l10n.dart';

extension MatrixFileExtension on MatrixFile {
  void save(BuildContext context) async {
    final fileName = name.split('/').last;
    if (PlatformInfos.isMobile) {
      final tmpDirectory = PlatformInfos.isAndroid
          ? Directory('/storage/emulated/0/Download')
          : await getTemporaryDirectory();
      final path = '${tmpDirectory.path}$fileName';
      await File(path).writeAsBytes(bytes);
      await Share.shareFiles([path]);
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text(L10n.of(context).savedFileAs(path))),
      );
      return;
    } else {
      final file = FilePickerCross(bytes);
      await file.exportToStorage(fileName: fileName);
    }
  }

  MatrixFile get detectFileType {
    if (msgType == MessageTypes.Image) {
      return MatrixImageFile(bytes: bytes, name: name);
    }
    if (msgType == MessageTypes.Video) {
      return MatrixVideoFile(bytes: bytes, name: name);
    }
    if (msgType == MessageTypes.Audio) {
      return MatrixAudioFile(bytes: bytes, name: name);
    }
    return this;
  }

  String get sizeString {
    var size = this.size.toDouble();
    if (size < 1000000) {
      size = size / 1000;
      size = (size * 10).round() / 10;
      return '${size.toString()} KB';
    } else if (size < 1000000000) {
      size = size / 1000000;
      size = (size * 10).round() / 10;
      return '${size.toString()} MB';
    } else {
      size = size / 1000000000;
      size = (size * 10).round() / 10;
      return '${size.toString()} GB';
    }
  }
}