59 lines
1.6 KiB
Dart
59 lines
1.6 KiB
Dart
import 'dart:async';
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import 'package:star_lock/talk/starChart/proto/talk_data.pb.dart';
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class TalkDataRepository {
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// 创建一个私有的构造函数，防止外部创建实例
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TalkDataRepository._() {
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_talkDataStreamController = StreamController<TalkData>.broadcast(
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onListen: () {
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_isListening = true;
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},
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onCancel: () {
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_isListening = false;
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},
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sync: false, // 异步模式
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);
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}
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// 使用 _instance 来保存单例对象
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static final TalkDataRepository _instance = TalkDataRepository._();
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// 提供一个静态方法来获取单例实例
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static TalkDataRepository get instance => _instance;
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// 创建一个 StreamController
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late final StreamController<TalkData> _talkDataStreamController;
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bool _isListening = false;
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// 用于存储数据的缓冲区
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final List<TalkData> _buffer = [];
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// 提供一个方法来获取 Stream
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Stream<TalkData> get talkDataStream =>
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_talkDataStreamController.stream.transform(
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StreamTransformer<TalkData, TalkData>.fromHandlers(
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handleData: (TalkData data, EventSink<TalkData> sink) {
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// 限制缓冲区大小为 100
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if (_buffer.length >= 100) {
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_buffer.removeAt(0); // 丢弃最旧的数据
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}
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_buffer.add(data);
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sink.add(data);
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},
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),
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);
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// 提供一个方法来添加 TalkData 到 Stream
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void addTalkData(TalkData talkData) {
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if (_isListening) {
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_talkDataStreamController.add(talkData);
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}
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}
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// 提供一个方法来关闭 StreamController
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void dispose() {
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_talkDataStreamController.close();
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}
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}
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