product category page: front-end sorting and filtering using turboframes

app/Http/Controllers/CategoryController.php

@@ -2,8 +2,8 @@
 
 namespace App\Http\Controllers;
 
+use App\Catalog\CategoryListing;
 use Illuminate\Http\Response;
-use Modules\Core\Catalog\DTOs\ProductFilters;
 use Modules\Core\Catalog\Services\CollectionService;
 use Modules\Core\Catalog\Services\ProductService;
 
@@ -19,27 +19,46 @@ public function show(string $locale, int $collection)
         $collectionData = $this->collections->getById($collection);
         abort_if($collectionData === null, Response::HTTP_NOT_FOUND);
 
+        $listing = CategoryListing::fromRequest(request());
+        $filters = $listing->filters($collectionData['id']);
         $perPage = 12;
-        $page = (int) request('page', 1);
 
         // Listing/filtering reads from the Meilisearch index via ProductService,
         // not Eloquent — see Modules\Core\Catalog\Services\ProductService. list() returns a
         // real LengthAwarePaginator of plain arrays (already localized/flattened),
-        // not Product models.
+        // not Product models. Sort/filter/page all come from the query string via
+        // CategoryListing, which is the single source of truth for that state.
         $products = $this->products->list(
-            filters: new ProductFilters(collectionId: $collectionData['id']),
+            filters: $filters,
             perPage: $perPage,
-            page: $page,
+            page: $listing->page,
+            sort: $listing->sort,
         )->through(fn (array $product) => [
             'name' => $product['name'],
             'price' => $product['price'],
             'image' => $product['media'][0]['url'] ?? null,
             'href' => route('product.show', ['id' => $product['id']]),
-        ]);
+        ])->appends($listing->query(['page' => null]));
+
+        // Slider bounds — the price span of everything matching the *other*
+        // filters (priceRange() drops the price filter itself, so the handles
+        // don't collapse to whatever's already selected). Whole euros.
+        $priceRange = $this->products->priceRange($filters);
+        $priceFloor = $priceRange['min'] !== null ? (int) floor($priceRange['min']) : null;
+        $priceCeil = $priceRange['max'] !== null ? (int) ceil($priceRange['max']) : null;
+
+        // A price param is only a real filter if it's tighter than the bounds —
+        // drives whether the "clear" link shows.
+        $priceFiltered = ($listing->minPrice !== null && $listing->minPrice > ($priceFloor ?? PHP_INT_MIN))
+            || ($listing->maxPrice !== null && $listing->maxPrice < ($priceCeil ?? PHP_INT_MAX));
 
         return view('category.show', [
             'collection' => $collectionData,
             'products' => $products,
+            'listing' => $listing,
+            'priceFloor' => $priceFloor,
+            'priceCeil' => $priceCeil,
+            'priceFiltered' => $priceFiltered,
         ]);
     }
 }