more improved version of AvatarOptions

lib/src/models/avatar_options.dart

@@ -1,9 +1,25 @@
 import 'package:acter_avatar/acter_avatar.dart';
 
-/// Abstract class representing the set of avatars.
-abstract class AvatarOptions {
-  AvatarInfo? get avatar;
-  List<AvatarInfo>? get parentAvatars;
-  double? get size;
-  double? get parentSize;
+/// Helper class for defining avatar type.
+/// Currently supported modes are Space/Group Chat (default), DM, Group DM.
+class AvatarOptions {
+  // Primary avatar. Having it null would switch to fallback.
+  AvatarInfo? avatar;
+  // Secondary group avatars. Having it null would switch to fallback.
+  List<AvatarInfo>? groupAvatars;
+  double? size;
+  double? groupAvatarSize;
+
+  /// Default usage .i.e. Space/Group Chat. Group avatars will appear as secondary badges.
+  AvatarOptions(
+      {required this.avatar,
+      required this.groupAvatars,
+      this.size,
+      this.groupAvatarSize});
+
+  /// useful for setting DM/Private Chat avatar.
+  AvatarOptions.DM(this.avatar, {this.size});
+
+  /// useful for setting Group DM chat. Group avatars will appear as stacked avatars.
+  AvatarOptions.GroupDM(this.groupAvatars, {this.groupAvatarSize});
 }