Initial commit

lib/utils/notification_avatar_extension.dart

@@ -0,0 +1,58 @@
+// SPDX-FileCopyrightText: 2019-Present Christian Kußowski
+// SPDX-FileCopyrightText: 2019-Present Contributors to FluffyChat
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:tatchat/utils/client_download_content_extension.dart';
+import 'package:matrix/matrix.dart';
+import 'package:path/path.dart' as path;
+
+import 'matrix_sdk_extensions/flutter_matrix_dart_sdk_database/builder.dart';
+
+const notificationAvatarDimension = 128;
+
+extension NotificationAvatarExtension on Client {
+  Future<Uint8List?> tryDownloadNotificationAvatar(Uri? avatar) async {
+    if (avatar == null) return null;
+    try {
+      return await downloadMxcCached(
+        avatar,
+        thumbnailMethod: ThumbnailMethod.crop,
+        width: notificationAvatarDimension,
+        height: notificationAvatarDimension,
+        animated: false,
+        isThumbnail: true,
+        rounded: true,
+      ).timeout(const Duration(seconds: 3));
+    } catch (e, s) {
+      Logs().e('Unable to get avatar picture', e, s);
+      return null;
+    }
+  }
+
+  /// Keep in sync with `createAttachment()` in iOS Notification Extension
+  /// This loads the avatar for a room and also stores it in a temporary
+  /// directory so the Notification Service Extension can access it later.
+  Future<String?> getIosNotificationAvatar(Uri? roomAvatar) async {
+    if (roomAvatar == null) return null;
+
+    final directory = await getFileStorageLocation();
+    if (directory == null) return null;
+
+    final host = roomAvatar.host.replaceAll('.', '_');
+    final rawPath = roomAvatar.pathSegments.join('_');
+    final fileName = 'notification_${host}_$rawPath.jpg';
+    final cachedFile = File(path.join(directory.path, fileName));
+
+    if (!await cachedFile.exists()) {
+      final bytes = await tryDownloadNotificationAvatar(roomAvatar);
+      if (bytes == null) return null;
+      await cachedFile.writeAsBytes(bytes);
+    }
+
+    return cachedFile.path;
+  }
+}