Warenwirtschaft: AP-00 bis AP-08 + aktualisierter Entwicklungsplan

Umsetzung der Warenwirtschafts-/Produktmanagement-Erweiterung gemaess
Entwicklungsplan V4.0:

- AP-00: Regressionsbasis fuer 5.1-Features (ProductPhase51Test)
- AP-01: URL-Bugfixes B1/B2 (suppliers/packaging-items, breitere url-Spalten)
- AP-04/04.1: iPad-taugliche, vereinheitlichte Tabellen-Aktionen
- AP-05: Einstellungen "Allgemein" mit UST-Saetzen (tax_rates) und
  Lieferzeit-Vorlagen (delivery_times, inkl. Tage-Feld)
- AP-06: Lieferanten um Bestellweg, Bestell-Mail/-URL und Lieferzeit erweitert
- AP-07/07.1: INCI um Lieferanten-Mehrfachwahl, UST und Lieferzeit erweitert;
  Lieferanten-Detailansicht im Modal mit pflegbaren INCI-/Verpackungslisten
- AP-08: Einkauf um UST-Snapshot, Netto/Brutto-Automatik und Duplizieren erweitert

Entwicklungsplan aktualisiert: alle Klaerungspunkte (§5) vom Kunden beantwortet
und in die jeweiligen APs eingearbeitet (AP-02/03/09/13/15), neues AP-18
(Hinweise-Doku unter Einstellungen) ergaenzt. Naechster Schritt eindeutig
markiert: AP-09 (Produktion auf Hersteller-Rezeptur, kein Fallback, Warnung).

app/Http/Controllers/Admin/Inventory/SupplierController.php

@@ -6,9 +6,14 @@ use App\Http\Controllers\Controller;
 use App\Http\Requests\Inventory\StoreSupplierRequest;
 use App\Http\Requests\Inventory\UpdateSupplierRequest;
 use App\Models\Country;
+use App\Models\DeliveryTime;
+use App\Models\Ingredient;
+use App\Models\PackagingItem;
 use App\Models\Supplier;
 use App\Models\SupplierCategory;
 use App\Repositories\SupplierRepository;
+use Illuminate\Contracts\View\View;
+use Illuminate\Http\Request;
 
 class SupplierController extends Controller
 {
@@ -31,6 +36,7 @@ class SupplierController extends Controller
             'model' => new Supplier(['active' => true, 'country_id' => $defaultCountryId]),
             'countries' => Country::query()->orderBy('de')->get(),
             'supplierCategories' => SupplierCategory::query()->orderBy('pos')->orderBy('name')->get(),
+            'deliveryTimes' => DeliveryTime::query()->active()->orderBy('pos')->orderBy('label')->get(),
         ]);
     }
 
@@ -43,6 +49,71 @@ class SupplierController extends Controller
         return redirect()->route('admin.inventory.suppliers.index');
     }
 
+    public function show(Supplier $supplier): View
+    {
+        return $this->renderDetails($supplier);
+    }
+
+    public function attachIngredient(Request $request, Supplier $supplier): View
+    {
+        $validated = $request->validate([
+            'ingredient_id' => ['required', 'integer', 'exists:ingredients,id'],
+        ]);
+
+        $supplier->ingredients()->syncWithoutDetaching([$validated['ingredient_id']]);
+
+        return $this->renderDetails($supplier);
+    }
+
+    public function detachIngredient(Supplier $supplier, Ingredient $ingredient): View
+    {
+        $supplier->ingredients()->detach($ingredient->id);
+
+        return $this->renderDetails($supplier);
+    }
+
+    public function attachPackagingItem(Request $request, Supplier $supplier): View
+    {
+        $validated = $request->validate([
+            'packaging_item_id' => ['required', 'integer', 'exists:packaging_items,id'],
+        ]);
+
+        PackagingItem::query()
+            ->whereKey($validated['packaging_item_id'])
+            ->update(['supplier_id' => $supplier->id]);
+
+        return $this->renderDetails($supplier);
+    }
+
+    public function detachPackagingItem(Supplier $supplier, PackagingItem $packagingItem): View
+    {
+        if ((int) $packagingItem->supplier_id === (int) $supplier->id) {
+            $packagingItem->update(['supplier_id' => null]);
+        }
+
+        return $this->renderDetails($supplier);
+    }
+
+    protected function renderDetails(Supplier $supplier): View
+    {
+        $supplier->load(['country', 'supplierCategories', 'ingredients', 'packagingItems']);
+
+        $assignedIngredientIds = $supplier->ingredients->pluck('id')->all();
+        $assignedPackagingItemIds = $supplier->packagingItems->pluck('id')->all();
+
+        return view('admin.inventory.suppliers._details', [
+            'supplier' => $supplier,
+            'availableIngredients' => Ingredient::query()
+                ->whereNotIn('id', $assignedIngredientIds)
+                ->orderBy('name')
+                ->get(),
+            'availablePackagingItems' => PackagingItem::query()
+                ->whereNotIn('id', $assignedPackagingItemIds)
+                ->orderBy('name')
+                ->get(),
+        ]);
+    }
+
     public function edit(Supplier $supplier)
     {
         $supplier->load('supplierCategories');
@@ -51,6 +122,7 @@ class SupplierController extends Controller
             'model' => $supplier,
             'countries' => Country::query()->orderBy('de')->get(),
             'supplierCategories' => SupplierCategory::query()->orderBy('pos')->orderBy('name')->get(),
+            'deliveryTimes' => DeliveryTime::query()->active()->orderBy('pos')->orderBy('label')->get(),
         ]);
     }