feat(search): implement catalog item search functionality with request validation and resource formatting

app/Domains/Catalog/Services/CatalogService.php

@@ -10,6 +10,9 @@ use App\Domains\Catalog\Models\CatalogItem;
 use App\Domains\Catalog\Models\Inventory;
 use App\Domains\Catalog\Models\ItemAttribute;
 use App\Domains\Catalog\Models\Variant;
+use App\Domains\Tenant\Models\Tenant;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Pagination\LengthAwarePaginator;
 use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Str;
 use Illuminate\Validation\ValidationException;
@@ -158,6 +161,55 @@ class CatalogService
         return $catalogItem;
     }
 
+    /** @return LengthAwarePaginator<CatalogItem> */
+    public function search(
+        Tenant $tenant,
+        string $term,
+        int $perPage,
+        int $page,
+    ): LengthAwarePaginator {
+        $normalizedTerm = mb_strtolower($term);
+        $containsPattern = "%{$normalizedTerm}%";
+        $startsWithPattern = "{$normalizedTerm}%";
+
+        $paginator = CatalogItem::query()
+            ->where('tenant_code', $tenant->codigo)
+            ->where(function (Builder $query) use ($containsPattern): void {
+                $query
+                    ->whereRaw('LOWER(nombre) LIKE ?', [$containsPattern])
+                    ->orWhereRaw('LOWER(descripcion) LIKE ?', [$containsPattern])
+                    ->orWhereHas(
+                        'brand',
+                        fn (Builder $brandQuery) => $brandQuery
+                            ->whereRaw('LOWER(nombre) LIKE ?', [$containsPattern])
+                    )
+                    ->orWhereHas(
+                        'category',
+                        fn (Builder $categoryQuery) => $categoryQuery
+                            ->whereRaw('LOWER(nombre) LIKE ?', [$containsPattern])
+                    );
+            })
+            ->with([
+                'attachments',
+                'inventory',
+                'variants.inventory',
+                'variants.attachments',
+                'variants.definitions.itemAttribute.attribute',
+                'bundleComponents.catalogItem',
+                'bundleComponents.variant.catalogItem',
+            ])
+            ->orderByRaw(
+                'CASE WHEN LOWER(nombre) = ? THEN 0 WHEN LOWER(nombre) LIKE ? THEN 1 ELSE 2 END',
+                [$normalizedTerm, $startsWithPattern],
+            )
+            ->orderBy('nombre')
+            ->paginate(perPage: $perPage, pageName: 'page', page: $page);
+
+        return $paginator->withPath(route('catalog-items.index', [
+            'tenant' => $tenant->codigo,
+        ]));
+    }
+
     public function delete(CatalogItem $catalogItem): void
     {
         DB::transaction(function () use ($catalogItem): void {