Issue #2978949 by BR0kEN, afi13: Notice: Undefined index: exposed in...

Issue #2978949 by BR0kEN, afi13: Notice: Undefined index: exposed in Drupal\better_exposed_filters\Plugin\views\exposed_form\BetterExposedFilters->exposedFormAlter()

src/Plugin/views/exposed_form/BetterExposedFilters.php

@@ -116,8 +116,9 @@ class BetterExposedFilters extends InputRequired {
      * Add options for exposed sorts.
      */
     $exposed = FALSE;
+    /* @var \Drupal\views\Plugin\views\HandlerBase $sort */
     foreach ($this->view->display_handler->getHandlers('sort') as $label => $sort) {
-      if ($sort->options['exposed']) {
+      if ($sort->isExposed()) {
         $exposed = TRUE;
         break;
       }
@@ -254,8 +255,9 @@ Title Desc|Z -> A</pre> Leave the replacement text blank to remove an option alt
     $bef_filter_intro = FALSE;
 
     // Go through each filter and add BEF options.
+    /* @var \Drupal\views\Plugin\views\HandlerBase $filter */
     foreach ($this->view->display_handler->getHandlers('filter') as $label => $filter) {
-      if (!$filter->options['exposed']) {
+      if (!$filter->isExposed()) {
         continue;
       }
 
@@ -873,13 +875,14 @@ Title Desc|Z -> A</pre> Leave the replacement text blank to remove an option alt
     }
 
     // Shorthand for all filters in this view.
+    /* @var \Drupal\views\Plugin\views\HandlerBase[] $filters */
     $filters = $form_state->get('view')->display_handler->handlers['filter'];
 
     // Go through each saved option looking for Better Exposed Filter settings.
     foreach ($settings as $label => $options) {
 
       // Sanity check: Ensure this filter is an exposed filter.
-      if (empty($filters[$label]) || !$filters[$label]->options['exposed']) {
+      if (empty($filters[$label]) || !$filters[$label]->isExposed()) {
         continue;
       }
 
@@ -1581,8 +1584,9 @@ Title Desc|Z -> A</pre> Leave the replacement text blank to remove an option alt
     );
 
     // Go through each exposed filter and collect settings.
+    /* @var \Drupal\views\Plugin\views\HandlerBase $filter */
     foreach ($this->view->display_handler->getHandlers('filter') as $label => $filter) {
-      if (!$filter->options['exposed']) {
+      if (!$filter->isExposed()) {
         continue;
       }