Luna/Luna.Core/Hubs/ChatHubContext.cs

using Luna.Core.Abstractions;
using Luna.Shared;
using Microsoft.AspNetCore.SignalR;

namespace Luna.Core.Hubs;

public class ChatHubContext(IHubContext<ChatHub> hubContext) : IChatHubContext
{
    public async Task SendResponseAsync(string connectionId, ChannelMessage message, CancellationToken cancellationToken = default)
    {
        await GetClient(connectionId)
            .SendAsync("OnMessageReceived", message, cancellationToken);
    }

    public async Task SendStreamingResponseAsync(
        string connectionId,
        IAsyncEnumerable<ChatStreamUpdate> messageStream,
        CancellationToken cancellationToken = default)
    {
        var client = GetClient(connectionId);

        await foreach (var update in messageStream.WithCancellation(cancellationToken))
        {
            await client.SendAsync("OnMessageStreamReceived", update, cancellationToken);
        }
    }

    private ISingleClientProxy GetClient(string connectionId)
        => hubContext.Clients.Client(connectionId);
}