ANTOOZA-BACKEND/Application/Abstractions/Chat/IChatConnectionTracker.cs

namespace Application.Abstractions.Chat;

public interface IChatConnectionTracker
{
    Task AddAsync(string channelSID, ConnectedUser user);
    Task RemoveAsync(string channelSID, string connectionId);
    Task<IReadOnlyList<ConnectedUser>> GetByChannelAsync(string channelSID);
    Task<int> GetCountByChannelAsync(string channelSID);

    // 전체 채널에 걸친 접속자 + 채널 SID (관리자 집계용)
    Task<IReadOnlyList<(
        string ChannelSID,
        ConnectedUser User
    )>> GetAllAsync();
    Task ClearAllAsync();
}