feat: add application preloader, identity roles, and resilient database initialization with automated seeding

scratch/check_db.cs

@@ -0,0 +1,44 @@
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.EntityFrameworkCore;
+using NexusReader.Infrastructure.Persistence;
+using Microsoft.Extensions.Configuration;
+using NexusReader.Domain.Entities;
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+
+var configuration = new ConfigurationBuilder()
+    .AddJsonFile("src/NexusReader.Web.New/appsettings.json")
+    .Build();
+
+var services = new ServiceCollection();
+var pgConnectionString = configuration.GetConnectionString("PostgresConnection");
+if (!string.IsNullOrEmpty(pgConnectionString))
+{
+    services.AddDbContext<AppDbContext>(options => options.UseNpgsql(pgConnectionString));
+}
+else
+{
+    services.AddDbContext<AppDbContext>(options => options.UseSqlite(configuration.GetConnectionString("SqliteConnection")));
+}
+
+var serviceProvider = services.BuildServiceProvider();
+using var scope = serviceProvider.CreateScope();
+var dbContext = scope.ServiceProvider.GetRequiredService<AppDbContext>();
+
+try 
+{
+    var user = await dbContext.Users.FirstOrDefaultAsync(u => u.Email == "admin@nexus.com");
+    if (user == null)
+    {
+        Console.WriteLine("User admin@nexus.com NOT FOUND in database.");
+    }
+    else
+    {
+        Console.WriteLine($"User found: {user.Email}, Id: {user.Id}, EmailConfirmed: {user.EmailConfirmed}");
+    }
+}
+catch (Exception ex)
+{
+    Console.WriteLine($"Error accessing database: {ex.Message}");
+}

src/NexusReader.Infrastructure/Persistence/DbInitializer.cs

@@ -0,0 +1,72 @@
+using Microsoft.AspNetCore.Identity;
+using Microsoft.Extensions.DependencyInjection;
+using NexusReader.Domain.Entities;
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace NexusReader.Infrastructure.Persistence;
+
+public static class DbInitializer
+{
+    public static async Task SeedAsync(IServiceProvider serviceProvider)
+    {
+        using var scope = serviceProvider.CreateScope();
+        var userManager = scope.ServiceProvider.GetRequiredService<UserManager<NexusUser>>();
+        var roleManager = scope.ServiceProvider.GetRequiredService<RoleManager<IdentityRole>>();
+
+        try
+        {
+            Console.WriteLine("[Seeder] Starting database seeding...");
+
+            // Seed Roles
+            string[] roleNames = { "Admin", "User" };
+            foreach (var roleName in roleNames)
+            {
+                var roleExist = await roleManager.RoleExistsAsync(roleName);
+                if (!roleExist)
+                {
+                    await roleManager.CreateAsync(new IdentityRole(roleName));
+                    Console.WriteLine($"[Seeder] Created role: {roleName}");
+                }
+            }
+
+            // Seed Admin User
+            var adminEmail = "admin@nexus.com";
+            var adminUser = await userManager.FindByEmailAsync(adminEmail);
+
+            if (adminUser == null)
+            {
+                adminUser = new NexusUser
+                {
+                    UserName = adminEmail,
+                    Email = adminEmail,
+                    EmailConfirmed = true,
+                    CurrentPlan = "Enterprise",
+                    AITokenLimit = 1000000,
+                    TenantId = Guid.NewGuid()
+                };
+
+                var createPowerUser = await userManager.CreateAsync(adminUser, "Admin123!");
+                if (createPowerUser.Succeeded)
+                {
+                    await userManager.AddToRoleAsync(adminUser, "Admin");
+                    Console.WriteLine($"[Seeder] Admin user created successfully: {adminEmail}");
+                }
+                else
+                {
+                    var errors = string.Join(", ", createPowerUser.Errors.Select(e => e.Description));
+                    Console.WriteLine($"[Seeder] Failed to create admin user: {errors}");
+                }
+            }
+            else
+            {
+                Console.WriteLine("[Seeder] Admin user already exists.");
+            }
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"[Seeder] Critical error during seeding: {ex.Message}");
+        }
+    }
+}

src/NexusReader.Maui/Main.razor

@@ -3,7 +3,11 @@
 
 <Router AppAssembly="@typeof(NexusReader.UI.Shared._Imports).Assembly">
     <Found Context="routeData">
-        <RouteView RouteData="@routeData" DefaultLayout="@typeof(NexusReader.UI.Shared.Layout.MainLayout)" />
+        <AuthorizeRouteView RouteData="@routeData" DefaultLayout="@typeof(NexusReader.UI.Shared.Layout.MainLayout)">
+            <NotAuthorized>
+                <RedirectToLogin />
+            </NotAuthorized>
+        </AuthorizeRouteView>
         <FocusOnNavigate RouteData="@routeData" Selector="h1" />
     </Found>
     <NotFound>

src/NexusReader.Maui/wwwroot/index.html

@@ -11,7 +11,12 @@
 
 <body>
 
-    <div id="app">Loading...</div>
+    <div id="app">
+        <div id="app-preloader">
+            <div class="preloader-spinner"></div>
+            <div class="preloader-text">Nexus Reader</div>
+        </div>
+    </div>
 
     <div id="blazor-error-ui">
         An unhandled error has occurred.

src/NexusReader.UI.Shared/Layout/MainLayout.razor

@@ -11,7 +11,9 @@
 @inject NavigationManager NavigationManager
 @implements IDisposable
 
-<div class="app-container @_platformClass @(FocusMode.IsFocusModeActive ? "focus-mode-active" : "")">
+<AuthorizeView>
+    <Authorized>
+        <div class="app-container @_platformClass @(FocusMode.IsFocusModeActive ? "focus-mode-active" : "")">
             <div class="reader-pane">
                 <main>
                     @Body
@@ -21,8 +23,6 @@
 
             <div class="resizer" id="sidebar-resizer"></div>
 
-    <AuthorizeView>
-        <Authorized>
             <div class="intelligence-sidebar">
                 <IntelligenceToolbar />
                 <div class="intelligence-content">
@@ -46,9 +46,18 @@
                     </div>
                 </div>
             </div>
+        </div>
     </Authorized>
-    </AuthorizeView>
+    <Authorizing>
-</div>
+        <div class="app-preloader">
+            <div class="preloader-spinner"></div>
+            <div class="preloader-text">Weryfikacja...</div>
+        </div>
+    </Authorizing>
+    <NotAuthorized>
+        @Body
+    </NotAuthorized>
+</AuthorizeView>
 
 <div id="blazor-error-ui" data-nosnippet>
     An unhandled error has occurred.

src/NexusReader.UI.Shared/wwwroot/app.css

@@ -100,3 +100,56 @@ h1:focus {
     margin: 1rem;
     border-radius: 8px;
 }
+
+/* Preloader Styles */
+#app-preloader, .app-preloader {
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background: radial-gradient(circle at center, #1a1a1a 0%, var(--nexus-bg) 100%);
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+    z-index: 9999;
+    transition: opacity 0.8s ease, visibility 0.8s;
+}
+
+#app-preloader.loaded {
+    opacity: 0;
+    visibility: hidden;
+}
+
+.preloader-spinner {
+    width: 80px;
+    height: 80px;
+    border: 3px solid rgba(0, 255, 153, 0.1);
+    border-top: 3px solid var(--nexus-neon);
+    border-radius: 50%;
+    animation: spin 1s cubic-bezier(0.4, 0, 0.2, 1) infinite;
+    filter: drop-shadow(0 0 10px var(--nexus-neon));
+    margin-bottom: 20px;
+}
+
+.preloader-text {
+    color: var(--nexus-neon);
+    font-family: var(--nexus-font-sans);
+    letter-spacing: 4px;
+    text-transform: uppercase;
+    font-size: 0.8rem;
+    font-weight: 500;
+    animation: pulse 2s infinite;
+}
+
+@keyframes spin {
+    0% { transform: rotate(0deg); }
+    100% { transform: rotate(360deg); }
+}
+
+@keyframes pulse {
+    0%, 100% { opacity: 1; transform: scale(1); }
+    50% { opacity: 0.5; transform: scale(0.95); }
+}
+

src/NexusReader.Web.New/Components/App.razor

@@ -5,7 +5,6 @@
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <base href="/" />
-    <ResourcePreloader />
     <link rel="stylesheet" href="_content/NexusReader.UI.Shared/app.css" />
     <link rel="stylesheet" href="NexusReader.Web.styles.css" />
     <ImportMap />
@@ -14,9 +13,35 @@
 </head>
 
 <body>
+    <div id="app-preloader">
+        <div class="preloader-spinner"></div>
+        <div class="preloader-text">Nexus Reader</div>
+    </div>
+
     <NexusReader.UI.Shared.Routes @rendermode="InteractiveAuto" />
     <ReconnectModal />
     <script src="_framework/blazor.web.js"></script>
+    <script>
+        (function() {
+            function hidePreloader() {
+                const preloader = document.getElementById('app-preloader');
+                if (preloader) {
+                    preloader.classList.add('loaded');
+                    // Completely remove from DOM after transition for better accessibility
+                    setTimeout(() => preloader.style.display = 'none', 1000);
+                }
+            }
+
+            if (document.readyState === 'complete') {
+                hidePreloader();
+            } else {
+                window.addEventListener('load', hidePreloader);
+            }
+            
+            // Fallback: If for some reason 'load' doesn't fire (e.g. big assets), hide after 3s anyway
+            setTimeout(hidePreloader, 3000);
+        })();
+    </script>
 </body>
 
 

src/NexusReader.Web.New/Program.cs

@@ -81,6 +81,7 @@ builder.Services.AddAuthentication(options =>
     });
 
 builder.Services.AddIdentityApiEndpoints<NexusUser>()
+    .AddRoles<IdentityRole>()
     .AddEntityFrameworkStores<AppDbContext>();
 
 builder.Services.ConfigureApplicationCookie(options =>
@@ -113,11 +114,38 @@ builder.Services.Configure<IdentityOptions>(options =>
 
 var app = builder.Build();
 
-// Ensure Database is initialized
+// Ensure Database is initialized and seeded
 using (var scope = app.Services.CreateScope())
 {
-    var dbContext = scope.ServiceProvider.GetRequiredService<NexusReader.Infrastructure.Persistence.AppDbContext>();
+    var services = scope.ServiceProvider;
+    var logger = services.GetRequiredService<ILogger<Program>>();
+    var dbContext = services.GetRequiredService<NexusReader.Infrastructure.Persistence.AppDbContext>();
+    
+    int maxRetries = 5;
+    int delayMs = 2000;
+    
+    for (int i = 0; i < maxRetries; i++)
+    {
+        try
+        {
+            logger.LogInformation("Próba połączenia z bazą danych (próba {Attempt}/{MaxRetries})...", i + 1, maxRetries);
             await dbContext.Database.MigrateAsync();
+            await DbInitializer.SeedAsync(services);
+            logger.LogInformation("Baza danych zainicjowana pomyślnie.");
+            break;
+        }
+        catch (Npgsql.NpgsqlException ex) when (i < maxRetries - 1)
+        {
+            logger.LogWarning("Błąd połączenia z bazą danych: {Message}. Ponowna próba za {Delay}ms...", ex.Message, delayMs);
+            await Task.Delay(delayMs);
+            delayMs *= 2; // Exponential backoff
+        }
+        catch (Exception ex)
+        {
+            logger.LogCritical(ex, "Krytyczny błąd podczas inicjalizacji bazy danych.");
+            throw;
+        }
+    }
 }
 
 // Configure the HTTP request pipeline.

src/NexusReader.Web.New/appsettings.json

@@ -26,5 +26,6 @@
       "Model": "gemini-2.5-flash-lite",
       "MaxOutputTokens": 8192
     }
-  }
+  },
+  "ApiBaseUrl": "http://localhost:5000"
 }