马良AI写作初始化仓库

AINoval/lib/utils/event_bus.dart

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+import 'dart:async';
+import 'package:ainoval/models/novel_snippet.dart';
+
+// 事件基类
+abstract class AppEvent {
+  const AppEvent();
+}
+
+// 小说结构更新事件
+class NovelStructureUpdatedEvent extends AppEvent {
+  final String novelId;
+  final String updateType; // 'outline_saved', 'chapter_added', 'scene_added', etc.
+  final Map<String, dynamic> data;
+
+  const NovelStructureUpdatedEvent({
+    required this.novelId,
+    required this.updateType,
+    required this.data,
+  });
+}
+
+// 片段创建事件
+class SnippetCreatedEvent extends AppEvent {
+  final NovelSnippet snippet;
+  const SnippetCreatedEvent({required this.snippet});
+}
+
+// 片段更新事件（可扩展）
+class SnippetUpdatedEvent extends AppEvent {
+  final NovelSnippet snippet;
+  const SnippetUpdatedEvent({required this.snippet});
+}
+
+// 片段删除事件（可扩展）
+class SnippetDeletedEvent extends AppEvent {
+  final String snippetId;
+  final String novelId;
+  const SnippetDeletedEvent({required this.snippetId, required this.novelId});
+}
+
+// 事件总线单例
+class EventBus {
+  // 单例实例
+  static final EventBus _instance = EventBus._internal();
+  static EventBus get instance => _instance;
+
+  // 事件流控制器
+  final StreamController<AppEvent> _eventController = StreamController<AppEvent>.broadcast();
+
+  // 获取事件流
+  Stream<AppEvent> get eventStream => _eventController.stream;
+
+  // 发送事件
+  void fire(AppEvent event) {
+    _eventController.add(event);
+  }
+
+  // 获取特定类型的事件流
+  Stream<T> on<T extends AppEvent>() {
+    return eventStream.where((event) => event is T).cast<T>();
+  }
+
+  // 私有构造函数，确保单例模式
+  EventBus._internal();
+
+  // 关闭事件总线
+  void dispose() {
+    _eventController.close();
+  }
+}