Refactor

lib/singbox/model/singbox_rule.dart

@@ -0,0 +1,35 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'singbox_rule.freezed.dart';
+part 'singbox_rule.g.dart';
+
+@freezed
+class SingboxRule with _$SingboxRule {
+  const SingboxRule._();
+
+  @JsonSerializable(fieldRename: FieldRename.kebab)
+  const factory SingboxRule({
+    String? domains,
+    String? ip,
+    String? port,
+    String? protocol,
+    @Default(RuleNetwork.tcpAndUdp) RuleNetwork network,
+    @Default(RuleOutbound.proxy) RuleOutbound outbound,
+  }) = _SingboxRule;
+
+  factory SingboxRule.fromJson(Map<String, dynamic> json) =>
+      _$SingboxRuleFromJson(json);
+}
+
+enum RuleOutbound { proxy, bypass, block }
+
+@JsonEnum(valueField: 'key')
+enum RuleNetwork {
+  tcpAndUdp(""),
+  tcp("tcp"),
+  udp("udp");
+
+  const RuleNetwork(this.key);
+
+  final String? key;
+}