swith to bang composite key

app/lib/features/bangs/data/models/bang_data.dart

@@ -19,6 +19,8 @@
  */
 import 'package:copy_with_extension/copy_with_extension.dart';
 import 'package:weblibre/features/bangs/data/models/bang.dart';
+import 'package:weblibre/features/bangs/data/models/bang_group.dart';
+import 'package:weblibre/features/bangs/data/models/bang_key.dart';
 import 'package:weblibre/features/geckoview/domain/entities/browser_icon.dart';
 
 part 'bang_data.g.dart';
@@ -30,6 +32,9 @@ class BangData extends Bang {
 
   final BrowserIcon? icon;
 
+  @override
+  BangGroup get group => super.group!;
+
   BangData({
     required super.websiteName,
     required super.domain,
@@ -43,6 +48,8 @@ class BangData extends Bang {
     this.icon,
   }) : frequency = frequency ?? 0;
 
+  BangKey toKey() => BangKey(group: group, trigger: trigger);
+
   @override
   List<Object?> get hashParameters => [
     ...super.hashParameters,

app/lib/features/bangs/data/models/bang_key.dart

@@ -0,0 +1,52 @@
+import 'package:json_annotation/json_annotation.dart';
+import 'package:nullability/nullability.dart';
+import 'package:weblibre/features/bangs/data/models/bang_group.dart';
+
+class BangKey {
+  final String trigger;
+  final BangGroup group;
+
+  const BangKey({required this.group, required this.trigger});
+
+  @override
+  String toString() {
+    return '${group.name}::$trigger';
+  }
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is BangKey &&
+          runtimeType == other.runtimeType &&
+          trigger == other.trigger &&
+          group == other.group;
+
+  @override
+  int get hashCode => Object.hash(trigger, group);
+
+  static BangKey? tryFromString(String key) {
+    try {
+      final [group, trigger] = key.split('::');
+      return BangKey(
+        group: BangGroup.values.firstWhere((g) => g.name == group),
+        trigger: trigger,
+      );
+    } catch (_) {
+      return null;
+    }
+  }
+}
+
+class BangKeyConverter implements JsonConverter<BangKey?, String?> {
+  const BangKeyConverter();
+
+  @override
+  BangKey? fromJson(String? json) {
+    return json.mapNotNull((json) => BangKey.tryFromString(json));
+  }
+
+  @override
+  String? toJson(BangKey? object) {
+    return object?.toString();
+  }
+}