57 lines
1.8 KiB
C#
57 lines
1.8 KiB
C#
using System;
|
||
using System.Collections.Generic;
|
||
|
||
namespace Core;
|
||
|
||
/// <summary>
|
||
/// 轻量事件总线（解耦系统之间的通信）
|
||
/// 设计说明：
|
||
/// 1) 系统层发布 DomainEvent，View/Controller 可订阅。
|
||
/// 2) 不依赖 Godot Signal，便于纯逻辑测试。
|
||
/// 注意事项：
|
||
/// - 事件为进程内同步调用，避免在事件里做耗时操作。
|
||
/// 未来扩展：
|
||
/// - 可加入“事件队列”和“延迟派发”以支持回合结算。
|
||
/// </summary>
|
||
public sealed class DomainEventBus {
|
||
private readonly Dictionary<Type, List<Delegate>> _handlers = new();
|
||
|
||
/// <summary>
|
||
/// 订阅事件
|
||
/// </summary>
|
||
/// <typeparam name="T">事件类型</typeparam>
|
||
/// <param name="handler">事件处理器</param>
|
||
public void Subscribe<T>(Action<T> handler) {
|
||
var type = typeof(T);
|
||
if (!_handlers.TryGetValue(type, out var list)) {
|
||
list = new List<Delegate>();
|
||
_handlers[type] = list;
|
||
}
|
||
|
||
list.Add(handler);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 取消订阅事件
|
||
/// </summary>
|
||
/// <typeparam name="T">事件类型</typeparam>
|
||
/// <param name="handler">事件处理器</param>
|
||
public void Unsubscribe<T>(Action<T> handler) {
|
||
var type = typeof(T);
|
||
if (_handlers.TryGetValue(type, out var list)) list.Remove(handler);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 发布事件
|
||
/// </summary>
|
||
/// <typeparam name="T">事件类型</typeparam>
|
||
/// <param name="evt">事件对象</param>
|
||
public void Publish<T>(T evt) {
|
||
var type = typeof(T);
|
||
if (!_handlers.TryGetValue(type, out var list)) return;
|
||
|
||
foreach (var handler in list)
|
||
if (handler is Action<T> typedHandler)
|
||
typedHandler.Invoke(evt);
|
||
}
|
||
} |