fix svg performance issue

lib/src/utils/avatars.dart

@@ -60,10 +60,26 @@ File avatarPNGFile(int contactId) {
   return File('${avatarsDirectory.path}/$contactId.png');
 }
 
-Future<Uint8List> getUserAvatar() async {
+File currentUserAvatarFile(int avatarCounter) {
+  final avatarsDirectory = Directory(
+    '${AppEnvironment.cacheDir}/avatars',
+  );
+
+  if (!avatarsDirectory.existsSync()) {
+    avatarsDirectory.createSync(recursive: true);
+  }
+  return File('${avatarsDirectory.path}/user_$avatarCounter.png');
+}
+
+Future<String?> getUserAvatar() async {
   if (userService.currentUser.avatarSvg == null) {
-    final data = await rootBundle.load('assets/images/default_avatar.png');
-    return data.buffer.asUint8List();
+    return null;
+  }
+
+  final avatarCounter = userService.currentUser.avatarCounter;
+  final file = currentUserAvatarFile(avatarCounter);
+  if (file.existsSync()) {
+    return file.path;
   }
 
   final pictureInfo = await vg.loadPicture(
@@ -76,9 +92,8 @@ Future<Uint8List> getUserAvatar() async {
   final byteData = await image.toByteData(format: ui.ImageByteFormat.png);
   final pngBytes = byteData!.buffer.asUint8List();
 
-  final file = avatarPNGFile(userService.currentUser.userId)
-    ..writeAsBytesSync(pngBytes);
+  await file.writeAsBytes(pngBytes);
   pictureInfo.picture.dispose();
 
-  return file.readAsBytesSync();
+  return file.path;
 }

lib/src/visual/components/avatar_icon.comp.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'dart:io';
 
 import 'package:flutter/material.dart';
 import 'package:flutter_svg/svg.dart';
@@ -29,7 +30,7 @@ class AvatarIcon extends StatefulWidget {
 
 class _AvatarIconState extends State<AvatarIcon> {
   List<Contact> _avatarContacts = [];
-  String? _avatarSvg;
+  String? _myAvatarPath;
 
   StreamSubscription<List<Contact>>? groupStream;
   StreamSubscription<List<Contact>>? contactsStream;
@@ -101,19 +102,9 @@ class _AvatarIconState extends State<AvatarIcon> {
           });
     } else if (widget.myAvatar) {
       _userSub = userService.onUserUpdated.listen((_) {
-        if (mounted) {
-          setState(() {
-            if (userService.currentUser.avatarSvg != null) {
-              _avatarSvg = userService.currentUser.avatarSvg;
-            } else {
-              _avatarContacts = [];
-            }
-          });
-        }
+        unawaited(_updateMyAvatar());
       });
-      if (userService.currentUser.avatarSvg != null) {
-        _avatarSvg = userService.currentUser.avatarSvg;
-      }
+      unawaited(_updateMyAvatar());
     } else if (widget.contactId != null) {
       contactStream = twonlyDB.contactsDao
           .watchContact(widget.contactId!)
@@ -127,17 +118,44 @@ class _AvatarIconState extends State<AvatarIcon> {
     if (mounted) setState(() {});
   }
 
+  Future<void> _updateMyAvatar() async {
+    final avatarSvg = userService.currentUser.avatarSvg;
+    if (avatarSvg == null) {
+      if (mounted) {
+        setState(() {
+          _myAvatarPath = null;
+          _avatarContacts = [];
+        });
+      }
+      return;
+    }
+
+    final path = await getUserAvatar();
+
+    if (mounted) {
+      setState(() {
+        _myAvatarPath = path;
+      });
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     final proSize = (widget.fontSize == null) ? 40 : (widget.fontSize! * 2);
 
     Widget avatars = Container();
 
-    if (_avatarSvg != null) {
-      avatars = SvgPicture.string(
-        _avatarSvg!,
-        errorBuilder: errorBuilder,
-      );
+    if (widget.myAvatar) {
+      if (_myAvatarPath != null) {
+        avatars = Image.file(
+          File(_myAvatarPath!),
+          errorBuilder: errorBuilder,
+        );
+      } else {
+        avatars = const SvgPicture(
+          AssetBytesLoader('assets/images/default_avatar.svg.vec'),
+        );
+      }
     } else if (_avatarContacts.length == 1) {
       avatars = getAvatarForContact(_avatarContacts.first);
     } else if (_avatarContacts.length >= 2) {

lib/src/visual/components/profile_qr_code.comp.dart

@@ -1,5 +1,6 @@
-import 'dart:typed_data';
+import 'dart:io';
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:qr_flutter/qr_flutter.dart';
 import 'package:twonly/src/utils/avatars.dart';
 import 'package:twonly/src/utils/misc.dart';
@@ -32,11 +33,20 @@ class _ProfileQrCodeCompState extends State<ProfileQrCodeComp> {
 
   Future<void> _loadData() async {
     final qr = await QrCodeUtils.publicProfileLink();
-    final avatar = widget.showAvatar ? await getUserAvatar() : null;
+    Uint8List? avatarBytes;
+    if (widget.showAvatar) {
+      final avatarPath = await getUserAvatar();
+      if (avatarPath != null) {
+        avatarBytes = await File(avatarPath).readAsBytes();
+      } else {
+        final data = await rootBundle.load('assets/images/default_avatar.png');
+        avatarBytes = data.buffer.asUint8List();
+      }
+    }
     if (mounted) {
       setState(() {
         _qrCode = qr;
-        _userAvatar = avatar;
+        _userAvatar = avatarBytes;
         _isLoading = false;
       });
     }
@@ -53,7 +63,6 @@ class _ProfileQrCodeCompState extends State<ProfileQrCodeComp> {
         child: loaded
             ? Container(
                 key: const ValueKey('qr_code_container'),
-                // padding: const EdgeInsets.all(3),
                 decoration: BoxDecoration(
                   color: context.color.primary,
                   borderRadius: BorderRadius.circular(12),
@@ -79,7 +88,9 @@ class _ProfileQrCodeCompState extends State<ProfileQrCodeComp> {
                     borderRadius: 2,
                   ),
                   gapless: false,
-                  embeddedImage: (widget.showAvatar && _userAvatar != null) ? MemoryImage(_userAvatar!) : null,
+                  embeddedImage: (widget.showAvatar && _userAvatar != null)
+                      ? MemoryImage(_userAvatar!)
+                      : null,
                   embeddedImageStyle: QrEmbeddedImageStyle(
                     size: const Size(60, 66),
                     embeddedImageShape: EmbeddedImageShape.square,