first submit

CHANGELOG.md

+## 0.0.1
+
+* TODO: Describe initial release.

LICENSE

+TODO: Add your license here.

README.md

+<!--
+This README describes the package. If you publish this package to pub.dev,
+this README's contents appear on the landing page for your package.
+
+For information about how to write a good package README, see the guide for
+[writing package pages](https://dart.dev/guides/libraries/writing-package-pages).
+
+For general information about developing packages, see the Dart guide for
+[creating packages](https://dart.dev/guides/libraries/create-library-packages)
+and the Flutter guide for
+[developing packages and plugins](https://flutter.dev/developing-packages).
+-->
+
+TODO: Put a short description of the package here that helps potential users
+know whether this package might be useful for them.
+
+## Features
+
+TODO: List what your package can do. Maybe include images, gifs, or videos.
+
+## Getting started
+
+TODO: List prerequisites and provide or point to information on how to
+start using the package.
+
+## Usage
+
+TODO: Include short and useful examples for package users. Add longer examples
+to `/example` folder.
+
+```dart
+const like = 'sample';
+```
+
+## Additional information
+
+TODO: Tell users more about the package: where to find more information, how to
+contribute to the package, how to file issues, what response they can expect
+from the package authors, and more.

analysis_options.yaml

+include: package:flutter_lints/flutter.yaml
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

lib/clx_notification_center.dart

+library clx_notification_center;
+
+export './notification_center/clx_notification_center.dart'
+    show defaultNotificationCenter;

lib/notification_center/clx_notification_body.dart

+import 'clx_notification_message.dart';
+import 'clx_notification_name.dart';
+
+typedef CLXNotificationChannel = Future Function(CLXNotificationMessage body);
+
+final class CLXNotificationBody {
+  final CLXNotificationName name;
+  final List<CLXNotificationChannel> listerenList = [];
+
+  CLXNotificationBody({required this.name});
+
+  bool addListen(CLXNotificationChannel listen) {
+    if (listerenList.where((element) => element == listen).isEmpty) {
+      listerenList.add(listen);
+    }
+    return true;
+  }
+
+  bool removeListen(CLXNotificationChannel listen) {
+    listerenList.removeWhere((element) => element == listen);
+    return true;
+  }
+
+  Future<bool> notify({dynamic object}) async {
+    for (final listen in listerenList) {
+      await listen.call(CLXNotificationMessage(name: name, object: object));
+    }
+    return true;
+  }
+}

lib/notification_center/clx_notification_center.dart

+import 'clx_notification_body.dart';
+import 'clx_notification_name.dart';
+
+final defaultNotificationCenter = _CLXNotificationCenter.getInstance();
+
+final class _CLXNotificationCenter {
+  static _CLXNotificationCenter? _instance;
+
+  _CLXNotificationCenter._internal();
+
+  static _CLXNotificationCenter getInstance() {
+    return _instance ?? _CLXNotificationCenter._internal();
+  }
+
+  /// 消息管理器
+  final Set<CLXNotificationBody> _notificationItems = {};
+
+  /// 注册消息监听
+  void registerListener(
+      {required String name, required CLXNotificationChannel callback}) {
+    _notificationItems.firstWhere((element) => element.name.isEqual(name),
+        orElse: () {
+      CLXNotificationBody body =
+          CLXNotificationBody(name: CLXNotificationName(name: name));
+      _notificationItems.add(body);
+      return body;
+    }).addListen(callback);
+  }
+
+  /// 移除消息监听
+  void removeListener(
+      {required String name, required CLXNotificationChannel callback}) {
+    _notificationItems
+        .firstWhere((element) => element.name.isEqual(name))
+        .removeListen(callback);
+  }
+
+  /// 发送消息
+  Future<bool> postNotification(
+      {required String name,
+      dynamic object,
+      Duration delay = Duration.zero}) async {
+    if (_notificationItems.isEmpty) {
+      return Future.value(false);
+    }
+
+    if (delay != Duration.zero) {
+      await Future.delayed(delay);
+    }
+    final list =
+        _notificationItems.where((element) => element.name.isEqual(name));
+    final resList = list.map((e) => e.notify(object: object)).toList();
+    return resList.isNotEmpty;
+  }
+}

lib/notification_center/clx_notification_message.dart

+import 'clx_notification_name.dart';
+
+final class CLXNotificationMessage {
+  final CLXNotificationName name;
+  final dynamic object;
+
+  CLXNotificationMessage({required this.name, required this.object});
+}

lib/notification_center/clx_notification_name.dart

+final class CLXNotificationName {
+  final String name;
+
+  const CLXNotificationName({required String name})
+      : name = 'clx_notification_$name';
+
+  @override
+  operator ==(Object other) {
+    if (other is CLXNotificationName) {
+      return name == other.name;
+    } else {
+      return false;
+    }
+  }
+
+  @override
+  int get hashCode => super.hashCode;
+
+  bool isEqual(Object other) {
+    if (other is CLXNotificationName) {
+      return name == other.name;
+    } else if (other is String) {
+      return name == 'clx_notification_$other';
+    } else {
+      return false;
+    }
+  }
+}

pubspec.yaml

+name: clx_notification_center
+description: "消息管理中心"
+version: 0.0.1
+homepage:
+
+environment:
+  sdk: '>=3.3.4 <4.0.0'
+  flutter: ">=1.17.0"
+
+dependencies:
+  flutter:
+    sdk: flutter
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+  flutter_lints: ^3.0.0
+
+flutter: