new version with ajax

conjuction_parantheses_correction.patch

@@ -0,0 +1,68 @@
+diff --git a/src/AdvancedSearchQuery.php b/src/AdvancedSearchQuery.php
+index af40fb7..b8c6eb7 100644
+--- a/src/AdvancedSearchQuery.php
++++ b/src/AdvancedSearchQuery.php
+@@ -143,6 +143,7 @@ class AdvancedSearchQuery {
+   public function alterQuery(Request $request, SolariumQueryInterface &$solarium_query, DrupalQueryInterface $search_api_query) {
+     // Only apply if a Advanced Search Query was made.
+     $terms = $this->getTerms($request);
++
+     if (!empty($terms)) {
+       $index = $search_api_query->getIndex();
+       /** @var \Drupal\search_api_solr\Plugin\search_api\backend\SearchApiSolrBackend $backend */
+@@ -163,11 +164,10 @@ class AdvancedSearchQuery {
+ 
+       if (!$isDismax) {
+         // To support negative queries we must first bring in all documents.
+-        $q[] = $this->negativeQuery($terms) ? "*:*" : "";
++        $q = $this->negativeQuery($terms) ? "*:*" : "";
+       }
+-
+       $term = array_shift($terms);
+-      $q[] = $term->toSolrQuery($field_mapping);
++      $q = '(' . trim($term->toSolrQuery($field_mapping));
+ 
+       // New.
+       $fields_list[] = $term->toSolrFields($field_mapping);
+@@ -180,8 +180,8 @@ class AdvancedSearchQuery {
+ 
+       // For multiple conditions.
+       foreach ($terms as $term) {
+-        $q[] = $term->getConjunction();
+-        $q[] = $term->toSolrQuery($field_mapping);
++        $q .= ')' . $term->getConjunction() . '(';
++        $q .= trim($term->toSolrQuery($field_mapping));
+ 
+         // New.
+         $fields_list[] = $term->toSolrFields($field_mapping);
+@@ -193,8 +193,8 @@ class AdvancedSearchQuery {
+         }
+ 
+       }
+-      $q = implode(' ', $q);
+ 
++      $q .= ')';
+       // Limit extra processing if Luncene Search is enable.
+       if ($isDismax) {
+ 
+@@ -257,7 +257,7 @@ class AdvancedSearchQuery {
+           foreach ($index->getFields() as $field_id => $field) {
+               $boostedFields[$field_id] = $field->getBoost();
+           }
+-          
++
+           $str_fields_with_boost = "";
+           // Adding a boost number for each field)
+           foreach($query_fields as $solr_field) {
+@@ -291,11 +291,9 @@ class AdvancedSearchQuery {
+         // make this field non-empty.
+         //$search_api_query->keys("advanced search");
+       }
+-
+       $solarium_query->setQuery($q);
+     }
+   }
+-
+   /**
+    * Alters the given view to be recursive if applicable.
+    *