feat(catalog): resolve options from partial variant selections

app/Domains/Catalog/Controllers/CatalogController.php

@@ -2,10 +2,12 @@
 
 namespace App\Domains\Catalog\Controllers;
 
+use App\Domains\Cart\Services\CartService;
 use App\Domains\Catalog\Models\CatalogItem;
 use App\Domains\Catalog\Models\Category;
 use App\Domains\Catalog\Models\FeaturedGroup;
 use App\Domains\Catalog\Requests\CatalogItemDetailRequest;
+use App\Domains\Catalog\Requests\CatalogVariantOptionsRequest;
 use App\Domains\Catalog\Requests\CategoryPageRequest;
 use App\Domains\Catalog\Requests\FeaturedGroupPageRequest;
 use App\Domains\Catalog\Requests\SearchCatalogItemsRequest;
@@ -14,8 +16,10 @@ use App\Domains\Catalog\Resources\CatalogFeaturedGroupResource;
 use App\Domains\Catalog\Resources\CatalogItemDetailResource;
 use App\Domains\Catalog\Resources\CatalogItemResource;
 use App\Domains\Catalog\Resources\CatalogSearchItemResource;
+use App\Domains\Catalog\Resources\CatalogVariantOptionsResource;
 use App\Domains\Catalog\Services\CatalogService;
 use App\Domains\Catalog\Services\FeaturedGroupService;
+use App\Domains\Catalog\Services\VariantSelectionService;
 use App\Domains\Tenant\Models\Tenant;
 use App\Http\Controllers\Controller;
 use Illuminate\Http\JsonResponse;
@@ -110,6 +114,36 @@ class CatalogController extends Controller
         );
     }
 
+    public function variantOptions(
+        CatalogVariantOptionsRequest $request,
+        Tenant $tenant,
+        CatalogItem $catalogItem,
+        VariantSelectionService $variantSelectionService,
+        CartService $cartService,
+    ): CatalogVariantOptionsResource {
+        abort_unless($catalogItem->tenant_code === $tenant->codigo, 404);
+
+        $includedVariantId = null;
+        $cartItemId = $request->validated('cart_item_id');
+
+        if ($cartItemId !== null) {
+            $cartItem = $cartService->show($tenant, $request)
+                ->items
+                ->firstWhere('id', (int) $cartItemId);
+            abort_unless($cartItem?->catalog_item_id === $catalogItem->id, 404);
+            $includedVariantId = $cartItem->variant_id;
+        }
+
+        return CatalogVariantOptionsResource::make(
+            $variantSelectionService->options(
+                $catalogItem,
+                $request->validated('selected_values', []),
+                array_map('intval', $request->validated('excluded_variant_ids', [])),
+                $includedVariantId,
+            )
+        );
+    }
+
     public function store(
         StoreCatalogItemRequest $request,
         Tenant $tenant,