RobotApp/RobotApp/Hubs/RobotHub.cs

using Microsoft.AspNetCore.SignalR;
using RobotApp.Common.Shares;
using RobotApp.VDA5050.State;
using System.Text.Json;

namespace RobotApp.Hubs
{
    public class RobotHub : Hub
    {
        // Client gọi để theo dõi robot cụ thể
        public async Task JoinRobot(string serialNumber)
        {
            await Groups.AddToGroupAsync(Context.ConnectionId, serialNumber);
        }

        public async Task LeaveRobot(string serialNumber)
        {
            await Groups.RemoveFromGroupAsync(Context.ConnectionId, serialNumber);
        }

        // Phương thức này sẽ được gọi từ service để broadcast
        public async Task SendState(string serialNumber, StateMsg state)
        {
            var json = JsonSerializer.Serialize(state, JsonOptionExtends.Write);
            await Clients.Group(serialNumber).SendAsync("ReceiveState", json);
        }
    }
}