Program.cs

using Microsoft.EntityFrameworkCore;
using WeChat.Data;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.SignalR;
using System.Security.Claims;
using WeChat.Hubs;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddRazorPages();
// Add MVC support
builder.Services.AddControllersWithViews();
builder.Services.AddDbContext<WebChatContext>(options =>
    options.UseSqlServer(builder.Configuration.GetConnectionString("DefaultConnection")));

// Add SignalR
builder.Services.AddSignalR();

// Add cookie authentication
builder.Services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
    .AddCookie(options =>
    {
        options.LoginPath = "/Account/Login";
        options.LogoutPath = "/Account/Logout";
        options.AccessDeniedPath = "/Account/AccessDenied";
        options.Cookie.HttpOnly = true;
        options.ExpireTimeSpan = TimeSpan.FromHours(12);
        options.SlidingExpiration = true;
    });

// Configure SignalR to use the User ID claim as the user identifier
builder.Services.AddSingleton<IUserIdProvider, NameUserIdProvider>();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Error");
    app.UseHsts();
}

// Seed the database
using (var scope = app.Services.CreateScope())
{
    var services = scope.ServiceProvider;
    var context = services.GetRequiredService<WebChatContext>();
    DbInitializer.Initialize(context);
}

app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

// Add authentication middleware
app.UseAuthentication();
app.UseAuthorization();

app.MapRazorPages();
// Thêm vào file Program.cs, trước route mặc định
app.MapControllerRoute(
    name: "userAliasRoute",
    pattern: "Users/{action=Index}/{id?}",
    defaults: new { controller = "User" });

// Route mặc định (đã có sẵn)
app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");

// Map SignalR hub
app.MapHub<ChatHub>("/chatHub");

app.Run();

// Custom user ID provider class to use the NameIdentifier claim
public class NameUserIdProvider : IUserIdProvider
{
    public string? GetUserId(HubConnectionContext connection)
    {
        return connection.User?.FindFirst(ClaimTypes.NameIdentifier)?.Value ?? string.Empty;
    }
}