squad-rain-ops-mini/Hubs/PresenceHub.cs

using Microsoft.AspNetCore.SignalR;
using RainOpsMini.Services;
using System;
using System.Security.Claims;
using System.Threading.Tasks;

namespace RainOpsMini.Hubs
{
    public class PresenceHub : Hub
    {
        private readonly OnlineUserService _onlineUserService;

        public PresenceHub(OnlineUserService onlineUserService)
        {
            _onlineUserService = onlineUserService;
        }

        public override async Task OnConnectedAsync()
        {
            var username = Context.User?.Identity?.Name;
            if (!string.IsNullOrEmpty(username))
            {
                _onlineUserService.UserConnected(username);
            }
            await base.OnConnectedAsync();
        }

        public override async Task OnDisconnectedAsync(Exception? exception)
        {
            var username = Context.User?.Identity?.Name;
            if (!string.IsNullOrEmpty(username))
            {
                _onlineUserService.UserDisconnected(username);
            }
            await base.OnDisconnectedAsync(exception);
        }
    }
}