feat: add webshop offline maintenance mode with admin toggle and red maintenance screen

app/Http/Controllers/Admin/ContentController.php

@@ -85,6 +85,10 @@ class ContentController extends Controller
             'footer_shipping_text',
             'footer_copyright',
             'footer_payment_text',
+
+            // Offline / Maintenance Mode
+            'shop_offline_title',
+            'shop_offline_message',
         ];
 
         // Handle checkbox toggles that aren't present if unchecked
@@ -92,6 +96,10 @@ class ContentController extends Controller
             Setting::set('announcement_enabled', '0');
         }
 
+        if ($request->has('shop_offline_submitted')) {
+            Setting::set('shop_offline', $request->boolean('shop_offline') ? '1' : '0');
+        }
+
         foreach ($fields as $field) {
             if ($request->has($field)) {
                 $value = $request->input($field);
@@ -168,4 +176,20 @@ class ContentController extends Controller
                 ->with('error', "Fout bij verzenden van e-mail via {$defaultMailer}: ".$e->getMessage());
         }
     }
+
+    /**
+     * Toggle the webshop offline / online status.
+     */
+    public function toggleOffline(Request $request): RedirectResponse
+    {
+        $current = Setting::get('shop_offline', '0') === '1';
+        $new = ! $current;
+        Setting::set('shop_offline', $new ? '1' : '0');
+        Setting::flushCache();
+
+        $statusText = $new ? 'OFFLINE gezet' : 'weer ONLINE gezet';
+
+        return redirect()->back()
+            ->with('success', "De webshop is direct {$statusText}!");
+    }
 }

app/Http/Middleware/CheckWebshopOffline.php

@@ -0,0 +1,75 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use App\Models\Setting;
+use Closure;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class CheckWebshopOffline
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  Closure(Request): (Response)  $next
+     */
+    public function handle(Request $request, Closure $next): Response
+    {
+        // If the webshop is not offline, continue normally
+        if (Setting::get('shop_offline', '0') !== '1') {
+            return $next($request);
+        }
+
+        // If the user is authenticated as an admin, allow full access
+        if ($request->user() && $request->user()->isAdmin()) {
+            return $next($request);
+        }
+
+        // Keep admin, auth, health check and asset routes accessible
+        if ($this->isExemptRoute($request)) {
+            return $next($request);
+        }
+
+        // Otherwise, render the large red offline maintenance screen
+        $title = Setting::get('shop_offline_title', 'Aan deze webshop wordt hard gewerkt! 🛠️');
+        $message = Setting::get('shop_offline_message', 'Onze 3D printers worden momenteel opnieuw gekalibreerd en we bouwen aan nieuwe toffe prints en functies. We zijn heel snel weer online!');
+
+        return response()->view('errors.offline', [
+            'offlineTitle' => $title,
+            'offlineMessage' => $message,
+        ], 503);
+    }
+
+    /**
+     * Check if the current route is exempt from offline mode.
+     */
+    protected function isExemptRoute(Request $request): bool
+    {
+        $exemptPatterns = [
+            'admin',
+            'admin/*',
+            'inloggen',
+            'login',
+            'uitloggen',
+            'logout',
+            'registreren',
+            'register',
+            'wachtwoord-*',
+            'up',
+            'health-debug',
+            'images/*',
+            'storage/*',
+            'build/*',
+            'favicon.ico',
+        ];
+
+        foreach ($exemptPatterns as $pattern) {
+            if ($request->is($pattern)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}