Add coupons, newsletter, country-based shipping, sale prices, USP bar

- Gutscheincodes: DB-Verwaltung (%, €-Rabatt, Mindestbestellwert, Ablauf),
  Eingabefeld im Checkout, Admin unter Marketing → Gutscheine
- Newsletter: Double-Opt-In per E-Mail, Formular im Footer,
  Admin-Liste mit CSV-Export
- Länderzonen-Versand: DE / DACH / EU / WORLD, Versandkosten nach
  Lieferland dynamisch berechnet, Coupon-Rabatt in Bestellung gespeichert
- Sale-Preise: sale_price auf Produkten, durchgestrichener UVP auf
  Produktkarte, Sonderangebote-Sektion auf Startseite
- USP-Leiste auf Startseite: Versand, Zahlung, Rückgabe, Service

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Http/Controllers/Admin/CouponController.php

@@ -0,0 +1,68 @@
+<?php
+
+namespace App\Http\Controllers\Admin;
+
+use App\Http\Controllers\Controller;
+use App\Models\Coupon;
+use Illuminate\Http\Request;
+
+class CouponController extends Controller
+{
+    public function index()
+    {
+        $coupons = Coupon::orderByDesc('created_at')->get();
+        return view('admin.coupons.index', compact('coupons'));
+    }
+
+    public function create()
+    {
+        return view('admin.coupons.form');
+    }
+
+    public function store(Request $request)
+    {
+        $data = $request->validate([
+            'code'            => 'required|string|max:50|unique:coupons,code',
+            'type'            => 'required|in:percent,fixed',
+            'value'           => 'required|numeric|min:0.01',
+            'min_order_value' => 'nullable|numeric|min:0',
+            'expires_at'      => 'nullable|date',
+            'max_uses'        => 'nullable|integer|min:1',
+            'active'          => 'boolean',
+        ]);
+        $data['code']   = strtoupper(trim($data['code']));
+        $data['active'] = $request->boolean('active');
+
+        Coupon::create($data);
+        return redirect()->route('admin.coupons.index')->with('success', 'Gutschein erstellt.');
+    }
+
+    public function edit(Coupon $coupon)
+    {
+        return view('admin.coupons.form', compact('coupon'));
+    }
+
+    public function update(Request $request, Coupon $coupon)
+    {
+        $data = $request->validate([
+            'code'            => 'required|string|max:50|unique:coupons,code,' . $coupon->id,
+            'type'            => 'required|in:percent,fixed',
+            'value'           => 'required|numeric|min:0.01',
+            'min_order_value' => 'nullable|numeric|min:0',
+            'expires_at'      => 'nullable|date',
+            'max_uses'        => 'nullable|integer|min:1',
+            'active'          => 'boolean',
+        ]);
+        $data['code']   = strtoupper(trim($data['code']));
+        $data['active'] = $request->boolean('active');
+
+        $coupon->update($data);
+        return redirect()->route('admin.coupons.index')->with('success', 'Gutschein aktualisiert.');
+    }
+
+    public function destroy(Coupon $coupon)
+    {
+        $coupon->delete();
+        return redirect()->route('admin.coupons.index')->with('success', 'Gutschein gelöscht.');
+    }
+}

app/Http/Controllers/Admin/NewsletterController.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace App\Http\Controllers\Admin;
+
+use App\Http\Controllers\Controller;
+use App\Models\NewsletterSubscriber;
+
+class NewsletterController extends Controller
+{
+    public function index()
+    {
+        $subscribers = NewsletterSubscriber::orderByDesc('created_at')->get();
+        return view('admin.newsletter.index', compact('subscribers'));
+    }
+
+    public function export()
+    {
+        $rows = NewsletterSubscriber::whereNotNull('confirmed_at')
+            ->orderBy('email')
+            ->pluck('email');
+
+        $csv = "E-Mail\n" . $rows->implode("\n");
+
+        return response($csv, 200, [
+            'Content-Type'        => 'text/csv; charset=UTF-8',
+            'Content-Disposition' => 'attachment; filename="newsletter-' . date('Y-m-d') . '.csv"',
+        ]);
+    }
+
+    public function destroy(NewsletterSubscriber $subscriber)
+    {
+        $subscriber->delete();
+        return back()->with('success', 'Abonnent gelöscht.');
+    }
+}

app/Http/Controllers/Admin/ProductController.php

@@ -39,6 +39,7 @@ class ProductController extends Controller
             'category_id' => 'nullable|exists:categories,id',
             'description' => 'nullable|string',
             'base_price'  => 'required|numeric|min:0',
+            'sale_price'  => 'nullable|numeric|min:0',
             'tax_rate'    => 'required|numeric|in:7,19',
             'weight'      => 'nullable|numeric|min:0',
             'active'       => 'boolean',
@@ -83,6 +84,7 @@ class ProductController extends Controller
             'category_id' => 'nullable|exists:categories,id',
             'description' => 'nullable|string',
             'base_price'  => 'required|numeric|min:0',
+            'sale_price'  => 'nullable|numeric|min:0',
             'tax_rate'    => 'required|numeric|in:7,19',
             'weight'      => 'nullable|numeric|min:0',
             'active'       => 'boolean',

app/Http/Controllers/Shop/CheckoutController.php

@@ -3,6 +3,7 @@
 namespace App\Http\Controllers\Shop;
 
 use App\Http\Controllers\Controller;
+use App\Models\Coupon;
 use App\Models\ShippingRate;
 use App\Services\CartService;
 use App\Services\OrderService;
@@ -21,12 +22,49 @@ class CheckoutController extends Controller
             return redirect()->route('cart.index')->with('error', 'Ihr Warenkorb ist leer.');
         }
         $subtotal     = $this->cart->subtotal();
-        $shippingRate = ShippingRate::forCart($subtotal);
+        $country      = session('checkout_country', 'DE');
+        $shippingRate = ShippingRate::forCart($subtotal, $country);
         $shippingCost = $shippingRate ? $shippingRate->getCostForTotal($subtotal) : 0;
-        $total        = $subtotal + $shippingCost;
+        $discount     = $this->getCouponDiscount($subtotal);
+        $total        = max(0, $subtotal - $discount) + $shippingCost;
         $userAddresses = auth()->user()?->addresses ?? collect();
+        $couponCode   = session('coupon_code');
 
-        return view('shop.checkout.index', compact('subtotal', 'shippingCost', 'total', 'userAddresses'));
+        return view('shop.checkout.index', compact('subtotal', 'shippingCost', 'total', 'userAddresses', 'discount', 'couponCode'));
+    }
+
+    public function applyCoupon(Request $request)
+    {
+        $code = trim($request->input('coupon_code', ''));
+        if (!$code) {
+            return back()->with('coupon_error', 'Bitte Gutscheincode eingeben.');
+        }
+        $coupon = Coupon::findValid($code);
+        if (!$coupon) {
+            return back()->with('coupon_error', 'Gutscheincode ungültig oder abgelaufen.');
+        }
+        $subtotal = $this->cart->subtotal();
+        if ($coupon->min_order_value && $subtotal < $coupon->min_order_value) {
+            return back()->with('coupon_error', 'Mindestbestellwert von ' . number_format($coupon->min_order_value, 2, ',', '.') . ' € nicht erreicht.');
+        }
+        session(['coupon_code' => $coupon->code]);
+        return back()->with('coupon_success', 'Gutschein "' . $coupon->code . '" angewendet!');
+    }
+
+    public function removeCoupon()
+    {
+        session()->forget('coupon_code');
+        return back()->with('coupon_success', 'Gutschein entfernt.');
+    }
+
+    public function shippingCost(Request $request)
+    {
+        $country = strtoupper($request->input('country', 'DE'));
+        session(['checkout_country' => $country]);
+        $subtotal     = $this->cart->subtotal();
+        $shippingRate = ShippingRate::forCart($subtotal, $country);
+        $cost         = $shippingRate ? $shippingRate->getCostForTotal($subtotal) : 0;
+        return response()->json(['cost' => $cost, 'formatted' => number_format($cost, 2, ',', '.') . ' €']);
     }
 
     public function storeAddress(Request $request)
@@ -83,10 +121,13 @@ class CheckoutController extends Controller
         if ($request->isMethod('get')) {
             $items        = $this->cart->get();
             $subtotal     = $this->cart->subtotal();
-            $shippingRate = ShippingRate::forCart($subtotal);
+            $country      = $checkoutData['shipping']['country'] ?? $checkoutData['billing']['country'] ?? 'DE';
+            $shippingRate = ShippingRate::forCart($subtotal, $country);
             $shippingCost = $shippingRate ? $shippingRate->getCostForTotal($subtotal) : 0;
-            $total        = $subtotal + $shippingCost;
-            return view('shop.checkout.confirm', compact('checkoutData', 'items', 'subtotal', 'shippingCost', 'total'));
+            $discount     = $this->getCouponDiscount($subtotal);
+            $total        = max(0, $subtotal - $discount) + $shippingCost;
+            $couponCode   = session('coupon_code');
+            return view('shop.checkout.confirm', compact('checkoutData', 'items', 'subtotal', 'shippingCost', 'total', 'discount', 'couponCode'));
         }
 
         $order = $this->orderService->createFromSession(
@@ -94,7 +135,7 @@ class CheckoutController extends Controller
             $checkoutData['payment_method']
         );
 
-        session()->forget('checkout_data');
+        session()->forget(['checkout_data', 'checkout_country']);
 
         return redirect()->route('checkout.thankyou', $order->order_number);
     }
@@ -104,4 +145,15 @@ class CheckoutController extends Controller
         $order = \App\Models\Order::where('order_number', $order)->firstOrFail();
         return view('shop.checkout.thankyou', compact('order'));
     }
+
+    private function getCouponDiscount(float $subtotal): float
+    {
+        if ($code = session('coupon_code')) {
+            $coupon = Coupon::findValid($code);
+            if ($coupon) {
+                return $coupon->calcDiscount($subtotal);
+            }
+        }
+        return 0;
+    }
 }

app/Http/Controllers/Shop/HomeController.php

@@ -12,12 +12,13 @@ class HomeController extends Controller
 {
     public function index()
     {
-        $banners     = Banner::where('active', true)->orderBy('sort_order')->get();
-        $categories  = Category::whereNull('parent_id')->where('active', true)->orderBy('sort_order')->get();
-        $topProducts = Product::where('active', true)->where('featured', true)->latest()->take(8)->get();
-        $newProducts = Product::where('active', true)->latest()->take(8)->get();
-        $blogPosts   = Page::where('type', 'blog')->where('published', true)->latest('published_at')->take(3)->get();
+        $banners      = Banner::where('active', true)->orderBy('sort_order')->get();
+        $categories   = Category::whereNull('parent_id')->where('active', true)->orderBy('sort_order')->get();
+        $topProducts  = Product::where('active', true)->where('featured', true)->with('images','variants','category')->latest()->take(8)->get();
+        $newProducts  = Product::where('active', true)->with('images','variants','category')->latest()->take(8)->get();
+        $saleProducts = Product::where('active', true)->whereNotNull('sale_price')->with('images','variants','category')->latest()->take(8)->get();
+        $blogPosts    = Page::where('type', 'blog')->where('published', true)->latest('published_at')->take(3)->get();
 
-        return view('shop.home', compact('banners', 'categories', 'topProducts', 'newProducts', 'blogPosts'));
+        return view('shop.home', compact('banners', 'categories', 'topProducts', 'newProducts', 'saleProducts', 'blogPosts'));
     }
 }

app/Http/Controllers/Shop/NewsletterController.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace App\Http\Controllers\Shop;
+
+use App\Http\Controllers\Controller;
+use App\Models\NewsletterSubscriber;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Mail;
+use Illuminate\Support\Str;
+
+class NewsletterController extends Controller
+{
+    public function subscribe(Request $request)
+    {
+        $request->validate(['newsletter_email' => 'required|email|max:255']);
+        $email = strtolower($request->input('newsletter_email'));
+
+        $existing = NewsletterSubscriber::where('email', $email)->first();
+
+        if ($existing && $existing->isConfirmed()) {
+            return back()->with('newsletter_info', 'Diese E-Mail-Adresse ist bereits angemeldet.');
+        }
+
+        $token = Str::random(64);
+
+        if ($existing) {
+            $existing->update(['token' => $token]);
+        } else {
+            NewsletterSubscriber::create(['email' => $email, 'token' => $token]);
+        }
+
+        $confirmUrl = route('newsletter.confirm', $token);
+        $shopName   = \App\Models\Setting::get('shop_name', 'Shop');
+
+        Mail::raw(
+            "Bitte bestätigen Sie Ihre Newsletter-Anmeldung:\n\n{$confirmUrl}\n\n"
+            . "Falls Sie sich nicht angemeldet haben, können Sie diese E-Mail ignorieren.\n\n"
+            . "– {$shopName}",
+            fn($m) => $m->to($email)->subject("Newsletter-Anmeldung bestätigen – {$shopName}")
+        );
+
+        return back()->with('newsletter_success', 'Bitte prüfen Sie Ihren Posteingang und bestätigen Sie die Anmeldung.');
+    }
+
+    public function confirm(string $token)
+    {
+        $subscriber = NewsletterSubscriber::where('token', $token)->whereNull('confirmed_at')->first();
+
+        if (!$subscriber) {
+            return redirect('/')->with('error', 'Ungültiger oder bereits verwendeter Bestätigungslink.');
+        }
+
+        $subscriber->update(['confirmed_at' => now(), 'token' => null]);
+
+        return redirect('/')->with('success', 'Newsletter-Anmeldung erfolgreich bestätigt!');
+    }
+}