From 9df4518afeb6d2aa96c4843d264e51bd764f835c Mon Sep 17 00:00:00 2001
From: Audrius <audrius.exe@gmail.com>
Date: Fri, 26 Jun 2026 11:15:18 +0200
Subject: [PATCH] Assign language to the facets template so theme overrides can
 read it

renderFacets() never assigned `language` to Smarty when rendering the faceted-search block, so themes that override facets.tpl and reference it - the Hummingbird price/weight slider reads {$language.is_rtl} to set `data-slider-direction` - received no `language` at all.

Assign the language alongside the other facet variables, as an ARRAY mirroring the global `language` the front controller assigns via ObjectPresenter. The template accesses it with Smarty array syntax ({$language.is_rtl}), so the value must be an array: passing the raw Language object would raise a fatal "Cannot use object of type Language as array" on PHP 8. The default (classic) theme is unaffected as it does not read `language` in this template.

Fixes #41846.
---
 src/Product/SearchProvider.php                | 19 +++++++++++
 .../Product/SearchProviderTest.php            | 32 +++++++++++++++++++
 2 files changed, 51 insertions(+)

diff --git a/src/Product/SearchProvider.php b/src/Product/SearchProvider.php
index 6ad576f2e..f4c65ab69 100644
--- a/src/Product/SearchProvider.php
+++ b/src/Product/SearchProvider.php
@@ -301,9 +301,28 @@ public function renderFacets(ProductSearchContext $context, ProductSearchResult
             return '';
         }
 
+        $language = $this->module->getContext()->language;
+
         $this->module->getContext()->smarty->assign(
             [
                 'show_quantities' => Configuration::get('PS_LAYERED_SHOW_QTIES'),
+                // Provide the language to the template so theme overrides can read it (e.g. the
+                // Hummingbird slider uses {$language.is_rtl} for the slider direction). It must be
+                // an ARRAY, mirroring the global `language` the front controller assigns (via
+                // ObjectPresenter), because the template accesses it with Smarty array syntax
+                // ({$language.is_rtl}); passing the Language object would make that a fatal
+                // "Cannot use object of type Language as array". (#41846)
+                'language' => [
+                    'id' => (int) $language->id,
+                    'name' => $language->name,
+                    'iso_code' => $language->iso_code,
+                    'locale' => $language->locale,
+                    'language_code' => $language->language_code,
+                    'active' => $language->active,
+                    'is_rtl' => $language->is_rtl,
+                    'date_format_lite' => $language->date_format_lite,
+                    'date_format_full' => $language->date_format_full,
+                ],
                 'facets' => $facetsVar,
                 'js_enabled' => $this->module->isAjax(),
                 'displayedFacets' => $displayedFacets,
diff --git a/tests/php/FacetedSearch/Product/SearchProviderTest.php b/tests/php/FacetedSearch/Product/SearchProviderTest.php
index a9adba7c0..4dda82a99 100644
--- a/tests/php/FacetedSearch/Product/SearchProviderTest.php
+++ b/tests/php/FacetedSearch/Product/SearchProviderTest.php
@@ -115,6 +115,16 @@ protected function setUp()
     {
         $this->database = Mockery::mock(Db::class);
         $this->context = Mockery::mock(Context::class);
+        $this->context->language = Mockery::mock(\Language::class);
+        $this->context->language->id = 1;
+        $this->context->language->name = 'English (English)';
+        $this->context->language->iso_code = 'en';
+        $this->context->language->locale = 'en-US';
+        $this->context->language->language_code = 'en-us';
+        $this->context->language->active = true;
+        $this->context->language->is_rtl = false;
+        $this->context->language->date_format_lite = 'Y-m-d';
+        $this->context->language->date_format_full = 'Y-m-d H:i:s';
         $this->converter = Mockery::mock(Converter::class);
         $this->serializer = Mockery::mock(URLSerializer::class);
         $this->facetCollection = Mockery::mock(FacetCollection::class);
@@ -181,6 +191,17 @@ public function testRenderFacetsWithFacetsCollection()
             ->with(
                 [
                     'show_quantities' => true,
+                    'language' => [
+                        'id' => 1,
+                        'name' => 'English (English)',
+                        'iso_code' => 'en',
+                        'locale' => 'en-US',
+                        'language_code' => 'en-us',
+                        'active' => true,
+                        'is_rtl' => false,
+                        'date_format_lite' => 'Y-m-d',
+                        'date_format_full' => 'Y-m-d H:i:s',
+                    ],
                     'facets' => [
                         [
                             'filters' => [],
@@ -240,6 +261,17 @@ public function testRenderFacetsWithFacetsCollectionAndFilters()
             ->with(
                 [
                     'show_quantities' => true,
+                    'language' => [
+                        'id' => 1,
+                        'name' => 'English (English)',
+                        'iso_code' => 'en',
+                        'locale' => 'en-US',
+                        'language_code' => 'en-us',
+                        'active' => true,
+                        'is_rtl' => false,
+                        'date_format_lite' => 'Y-m-d',
+                        'date_format_full' => 'Y-m-d H:i:s',
+                    ],
                     'facets' => [
                         [
                             'displayed' => true,