refactor: Remove dart from folder name

lib/utils/matrix_sdk_extensions/event_extension.dart

@@ -0,0 +1,49 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+
+import 'package:future_loading_dialog/future_loading_dialog.dart';
+import 'package:matrix/matrix.dart';
+
+import 'package:fluffychat/utils/size_string.dart';
+import 'matrix_file_extension.dart';
+
+extension LocalizedBody on Event {
+  Future<LoadingDialogResult<MatrixFile?>> _getFile(BuildContext context) =>
+      showFutureLoadingDialog(
+        context: context,
+        future: downloadAndDecryptAttachment,
+      );
+
+  void saveFile(BuildContext context) async {
+    final matrixFile = await _getFile(context);
+
+    matrixFile.result?.save(context);
+  }
+
+  void shareFile(BuildContext context) async {
+    final matrixFile = await _getFile(context);
+
+    matrixFile.result?.share(context);
+  }
+
+  bool get isAttachmentSmallEnough =>
+      infoMap['size'] is int &&
+      infoMap['size'] < room.client.database!.maxFileSize;
+
+  bool get isThumbnailSmallEnough =>
+      thumbnailInfoMap['size'] is int &&
+      thumbnailInfoMap['size'] < room.client.database!.maxFileSize;
+
+  bool get showThumbnail =>
+      [MessageTypes.Image, MessageTypes.Sticker, MessageTypes.Video]
+          .contains(messageType) &&
+      (kIsWeb ||
+          isAttachmentSmallEnough ||
+          isThumbnailSmallEnough ||
+          (content['url'] is String));
+
+  String? get sizeString => content
+      .tryGetMap<String, dynamic>('info')
+      ?.tryGet<int>('size')
+      ?.sizeString;
+}