BeReadyBackend/BeReadyBackend/Hubs/GroupHub.cs

using Microsoft.AspNetCore.SignalR;
using Microsoft.Extensions.Primitives;

namespace BeReadyBackend.Hubs;

public class GroupHub : Hub
{
    public async Task SendProofToGroup(int groupId, string proofUrl)
    {
        await Clients.Group($"group-{groupId}").SendAsync("ReceiveProof", proofUrl);
    }

    public async Task SendMessageToGroup(int groupId, string message)
    {
        await Clients.Group($"group-{groupId}").SendAsync("ReceiveMessage", message);
    }

    public async Task StartVoteIntoGroup(int groupId)
    {
        await Clients.Group($"group-{groupId}").SendAsync("StartVote");
    }

    public override async Task OnConnectedAsync()
    {
        HttpContext? httpContext = Context.GetHttpContext();
        if (httpContext!.Request.Query.TryGetValue("groupId", out StringValues groupId))
        {
            await Groups.AddToGroupAsync(Context.ConnectionId, $"group-{groupId}");
        }

        await base.OnConnectedAsync();
    }
}