GFramework/GFramework.Core.Abstractions/Events/IEventBus.cs

// Copyright (c) 2025-2026 GeWuYou
// SPDX-License-Identifier: Apache-2.0

namespace GFramework.Core.Abstractions.Events;

/// <summary>
///     事件总线接口，提供事件的发送、注册和注销功能
/// </summary>
public interface IEventBus
{
    /// <summary>
    ///     发送事件，自动创建事件实例
    /// </summary>
    /// <typeparam name="T">事件类型，必须具有无参构造函数</typeparam>
    void Send<T>() where T : new();

    /// <summary>
    ///     发送指定的事件实例
    /// </summary>
    /// <typeparam name="T">事件类型</typeparam>
    /// <param name="e">事件实例</param>
    void Send<T>(T e);

    /// <summary>
    ///     发送指定的事件实例，并指定传播模式
    /// </summary>
    /// <typeparam name="T">事件类型</typeparam>
    /// <param name="e">事件实例</param>
    /// <param name="propagation">事件传播模式</param>
    void Send<T>(T e, EventPropagation propagation);

    /// <summary>
    ///     注册事件监听器
    /// </summary>
    /// <typeparam name="T">事件类型</typeparam>
    /// <param name="onEvent">事件处理回调函数</param>
    /// <returns>反注册接口，用于注销事件监听</returns>
    IUnRegister Register<T>(Action<T> onEvent);

    /// <summary>
    ///     注册事件监听器，并指定优先级
    /// </summary>
    /// <typeparam name="T">事件类型</typeparam>
    /// <param name="onEvent">事件处理回调函数</param>
    /// <param name="priority">优先级，数值越大优先级越高</param>
    /// <returns>反注册接口，用于注销事件监听</returns>
    IUnRegister Register<T>(Action<T> onEvent, int priority);

    /// <summary>
    ///     注销事件监听器
    /// </summary>
    /// <typeparam name="T">事件类型</typeparam>
    /// <param name="onEvent">要注销的事件处理回调函数</param>
    void UnRegister<T>(Action<T> onEvent);
}