OEL-543: Facets form alter.

oe_whitelabel.theme

@@ -7,6 +7,8 @@
 
 declare(strict_types = 1);
 
+use Drupal\Core\Form\FormStateInterface;
+
 /**
  * Implements hook__preprocess_links__language_block().
  */
@@ -64,3 +66,28 @@ function oe_whitelabel_preprocess_links__language_block(&$variables) {
     ],
   ];
 }
+
+/**
+ * Implements hook_form_FORM_ID_alter() for facets_forms.
+ */
+function oe_whitelabel_form_facets_form_alter(&$form, FormStateInterface $form_state, $form_id) {
+  if (isset($form['actions'])) {
+    $form['actions']['#attributes']['class'][] = 'mt-4';
+  }
+  if (isset($form['actions']['submit'])) {
+    $submit_classes = ['me-2', 'btn', 'btn-primary'];
+    foreach ($submit_classes as $submit_class) {
+      if (!in_array($submit_class, $form['actions']['submit']['#attributes']['class'], TRUE)) {
+        $form['actions']['submit']['#attributes']['class'][] = $submit_class;
+      }
+    }
+  }
+  if (isset($form['actions']['reset'])) {
+    $reset_classes = ['btn', 'btn-secondary'];
+    foreach ($reset_classes as $reset_class) {
+      if (!in_array($reset_class, $form['actions']['reset']['#attributes']['class'], TRUE)) {
+        $form['actions']['reset']['#attributes']['class'][] = $reset_class;
+      }
+    }
+  }
+}