Warenwirtschaft: AP-09 bis AP-13 (Produktbestand, Set-Produkte, Ausschuss, Konzepte)

- AP-09 Produktbestand inkl. Bewegungshistorie (product_stock_movements, ProductStockService)
- AP-10 Rohstoffbestand-Ansicht je Lager (RawMaterialStockController)
- AP-11 Bestandsschwellen / Out-of-Stock-Handling fuer Produkte und Shop
- AP-12 Ausgang/Ausschuss (stock_disposals, StockDisposalController, InventoryService)
- Set-Produkte (product_set_items) inkl. Aufloesung
- Produktentwicklung & Hinweise-Verwaltung (Notices)
- AP-13 Entwicklungskonzept Shop-Bestandsabzug im Plan dokumentiert
- Feature-Tests fuer neue Module + aktualisierter Entwicklungsplan

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Http/Controllers/ProductController.php

@@ -9,6 +9,7 @@ use App\Models\Product;
 use App\Models\ProductImage;
 use App\Models\ProductIngredient;
 use App\Repositories\ProductRepository;
+use Illuminate\Database\Eloquent\Collection;
 use Request;
 use Validator;
 
@@ -47,7 +48,7 @@ class ProductController extends Controller
             $model->active = true;
         } else {
             $model = Product::findOrFail($id);
-            $model->load(['packagings.packagingMaterial']);
+            $model->load(['packagings.packagingMaterial', 'setItems']);
         }
 
         $country_for_prices = Country::where('own_eur', '=', true)->orWhere('currency', '=', true)->get();
@@ -56,11 +57,27 @@ class ProductController extends Controller
             'country_for_prices' => $country_for_prices,
             'ingredient_catalog' => Ingredient::query()->where('active', true)->with('materialQuality')->orderBy('name')->get(['id', 'name', 'inci', 'effect', 'default_factor', 'material_quality_id']),
             'packaging_catalog' => PackagingItem::query()->where('active', true)->with('packagingMaterial')->orderBy('name')->get(),
+            'set_product_catalog' => $this->setProductCatalog($model),
         ];
 
         return view('admin.product.edit', $data);
     }
 
+    /**
+     * Auswählbare Set-Bestandteile: aktive Einzelprodukte (keine Sets, nicht das Produkt selbst).
+     *
+     * @return Collection<int, Product>
+     */
+    protected function setProductCatalog(Product $model)
+    {
+        return Product::query()
+            ->where('active', true)
+            ->singleProducts()
+            ->when($model->id, fn ($q) => $q->where('id', '!=', $model->id))
+            ->orderBy('name')
+            ->get(['id', 'name', 'number']);
+    }
+
     public function store()
     {
 
@@ -87,15 +104,18 @@ class ProductController extends Controller
             $model = new Product;
         } else {
             $model = Product::findOrFail($data['id']);
-            $model->load(['packagings.packagingMaterial']);
+            $model->load(['packagings.packagingMaterial', 'setItems']);
         }
         $country_for_prices = Country::where('own_eur', '=', true)->orWhere('currency', '=', true)->get();
 
+        $this->validateSetItems($validator, Request::all(), $model);
+
         $data = [
             'product' => $model,
             'country_for_prices' => $country_for_prices,
             'ingredient_catalog' => Ingredient::query()->where('active', true)->with('materialQuality')->orderBy('name')->get(['id', 'name', 'inci', 'effect', 'default_factor', 'material_quality_id']),
             'packaging_catalog' => PackagingItem::query()->where('active', true)->with('packagingMaterial')->orderBy('name')->get(),
+            'set_product_catalog' => $this->setProductCatalog($model),
         ];
 
         if ($validator->fails()) {
@@ -110,6 +130,43 @@ class ProductController extends Controller
         }
     }
 
+    /**
+     * Set-Validierung: Set braucht mindestens ein Einzelprodukt als Bestandteil
+     * (keine Sets, nicht das Produkt selbst).
+     *
+     * @param  array<string, mixed>  $data
+     */
+    protected function validateSetItems($validator, array $data, Product $model): void
+    {
+        if (! isset($data['is_set'])) {
+            return;
+        }
+
+        $validator->after(function ($validator) use ($data, $model) {
+            $componentIds = collect($data['set_component_id'] ?? [])
+                ->map(fn ($id) => (int) $id)
+                ->filter(fn (int $id) => $id > 0 && $id !== (int) $model->id)
+                ->unique()
+                ->values();
+
+            if ($componentIds->isEmpty()) {
+                $validator->errors()->add('set_component_id', __('Ein Set benötigt mindestens ein Einzelprodukt als Bestandteil.'));
+
+                return;
+            }
+
+            $components = Product::query()->whereIn('id', $componentIds)->get(['id', 'is_set']);
+
+            if ($components->count() !== $componentIds->count()) {
+                $validator->errors()->add('set_component_id', __('Mindestens ein gewählter Bestandteil existiert nicht.'));
+            }
+
+            if ($components->where('is_set', true)->isNotEmpty()) {
+                $validator->errors()->add('set_component_id', __('Set-Bestandteile dürfen selbst keine Sets sein.'));
+            }
+        });
+    }
+
     public function copy($id)
     {
         $model = Product::findOrFail($id);