feat(categories): add category retrieval and pagination for tenant-specific products

app/Domains/Tenant/Resources/TenantResource.php

@@ -2,6 +2,7 @@
 
 namespace App\Domains\Tenant\Resources;
 
+use App\Domains\Catalog\Models\Category;
 use App\Domains\Menu\Models\Menu;
 use App\Domains\Tenant\Models\Tenant;
 use Illuminate\Http\Request;
@@ -64,9 +65,43 @@ class TenantResource extends JsonResource
                 'menues',
                 fn () => $this->menuTree($this->menues)
             ),
+            'categories' => $this->whenLoaded(
+                'categories',
+                fn () => $this->categoryTree($this->categories)
+            ),
         ];
     }
 
+    /**
+     * @param  Collection<int, Category>  $categories
+     * @return Collection<int, array<string, mixed>>
+     */
+    private function categoryTree(Collection $categories): Collection
+    {
+        $categoryIds = $categories->pluck('id')->flip();
+        $childrenByParent = $categories
+            ->filter(fn (Category $category) => $category->categoria_id !== null
+                && $categoryIds->has($category->categoria_id))
+            ->groupBy('categoria_id');
+
+        $formatCategory = function (Category $category) use (&$formatCategory, $childrenByParent): array {
+            return [
+                'id' => $category->id,
+                'nombre' => $category->nombre,
+                'subcategories' => $childrenByParent
+                    ->get($category->id, collect())
+                    ->map($formatCategory)
+                    ->values(),
+            ];
+        };
+
+        return $categories
+            ->filter(fn (Category $category) => $category->categoria_id === null
+                || ! $categoryIds->has($category->categoria_id))
+            ->map($formatCategory)
+            ->values();
+    }
+
     /**
      * @param  Collection<int, Menu>  $menus
      * @return Collection<int, array<string, mixed>>