WorkTracker/Program.cs

using System.Globalization;
using Microsoft.AspNetCore.Components.Authorization;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Localization;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Options;
using MongoDB.Driver;
using WorkTracker.Components;
using WorkTracker.Components.Account;
using WorkTracker.Configuration;
using WorkTracker.Data;
using WorkTracker.Services.Auth;
using WorkTracker.Services.Festivities;
using WorkTracker.Services.Settings;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddRazorComponents()
    .AddInteractiveServerComponents();

builder.Services.AddCascadingAuthenticationState();
builder.Services.AddScoped<IdentityUserAccessor>();
builder.Services.AddScoped<IdentityRedirectManager>();
builder.Services.AddScoped<AuthenticationStateProvider, IdentityRevalidatingAuthenticationStateProvider>();

builder.Services.AddAuthentication(options =>
    {
        options.DefaultScheme = IdentityConstants.ApplicationScheme;
        options.DefaultSignInScheme = IdentityConstants.ExternalScheme;
    })
    .AddIdentityCookies();

var connectionString = builder.Configuration.GetConnectionString("DefaultConnection") ?? throw new InvalidOperationException("Connection string 'DefaultConnection' not found.");
builder.Services.AddDbContext<ApplicationDbContext>(options =>
    options.UseSqlite(connectionString));
builder.Services.AddDatabaseDeveloperPageExceptionFilter();

builder.Services.AddIdentityCore<ApplicationUser>(options => options.SignIn.RequireConfirmedAccount = false)
    .AddEntityFrameworkStores<ApplicationDbContext>()
    .AddSignInManager()
    .AddDefaultTokenProviders();

builder.Services.AddSingleton<IEmailSender<ApplicationUser>, IdentityNoOpEmailSender>();
builder.Services.AddLocalization();

builder.Services.Configure<MongoDbOptions>(builder.Configuration.GetSection(MongoDbOptions.SectionName));
builder.Services.Configure<SingleUserOptions>(builder.Configuration.GetSection(SingleUserOptions.SectionName));

builder.Services.AddSingleton<IMongoClient>(sp =>
{
    var options = sp.GetRequiredService<IOptions<MongoDbOptions>>().Value;
    return new MongoClient(options.ConnectionString);
});

builder.Services.AddSingleton(sp =>
{
    var options = sp.GetRequiredService<IOptions<MongoDbOptions>>().Value;
    var mongoClient = sp.GetRequiredService<IMongoClient>();
    return mongoClient.GetDatabase(options.DatabaseName);
});

builder.Services.AddScoped<IAppSettingsService, MongoAppSettingsService>();
builder.Services.AddSingleton<IItalianFestivitySource, ItalianFestivitySource>();
builder.Services.AddHostedService<SingleUserSeedService>();

var app = builder.Build();

var italianCulture = new CultureInfo("it-IT");
CultureInfo.DefaultThreadCurrentCulture = italianCulture;
CultureInfo.DefaultThreadCurrentUICulture = italianCulture;

var localizationOptions = new RequestLocalizationOptions
{
    DefaultRequestCulture = new RequestCulture(italianCulture),
    SupportedCultures = [italianCulture],
    SupportedUICultures = [italianCulture]
};

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseMigrationsEndPoint();
}
else
{
    app.UseExceptionHandler("/Error", createScopeForErrors: true);
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}

app.UseHttpsRedirection();

app.UseRequestLocalization(localizationOptions);

app.UseAntiforgery();

app.MapStaticAssets();
app.MapRazorComponents<App>()
    .AddInteractiveServerRenderMode();

// Add additional endpoints required by the Identity /Account Razor components.
app.MapAdditionalIdentityEndpoints();

app.Run();