Improvement of sub-categories count

src/Adapter/MySQL.php

@@ -44,6 +44,9 @@ class MySQL extends AbstractAdapter
      */
     const INNER_JOIN = 'INNER JOIN';
 
+    /** @var bool */
+    private $categoryCount = false;
+
     /**
      * {@inheritdoc}
      */
@@ -95,6 +98,12 @@ public function getQuery()
         // Prepare mapping for joined tables
         $filterToTableMapping = $this->getFieldMapping();
 
+        if ($this->categoryCount === true) {
+            unset($filterToTableMapping['nleft']);
+            unset($filterToTableMapping['nright']);
+            unset($filterToTableMapping['id_group']);
+        }
+
         // Process and generate all fields for the SQL query below
         $orderField = $this->computeOrderByField($filterToTableMapping);
         $selectFields = $this->computeSelectFields($filterToTableMapping);
@@ -122,6 +131,18 @@ public function getQuery()
             }
         }
 
+
+        if ($this->categoryCount === true) {
+            foreach($whereConditions as $key => $oneCondition) {
+                if (strpos($oneCondition, 'p.id_group') !== false) {
+                    unset($whereConditions[$key]);
+                }
+                if (strpos($oneCondition, 'p.nleft') !== false || strpos($oneCondition, 'p.nright') !== false) {
+                    unset($whereConditions[$key]);
+                }
+            }
+        }
+
         // Add where conditions if any
         if (!empty($whereConditions)) {
             $query .= ' WHERE ' . implode(' AND ', $whereConditions);
@@ -792,8 +813,9 @@ public function count()
     /**
      * {@inheritdoc}
      */
-    public function valueCount($fieldName = null)
+    public function valueCount($fieldName = null, $categoryCount = false)
     {
+        $this->categoryCount = $categoryCount;
         $this->resetGroupBy();
         if ($fieldName !== null) {
             $this->addGroupBy($fieldName);
@@ -804,7 +826,6 @@ public function valueCount($fieldName = null)
         $this->setOrderField('');
 
         $this->copyOperationsFilters();
-
         return $this->execute();
     }
 

src/Filters/Block.php

@@ -989,7 +989,25 @@ private function getCategoriesBlock($filter, $selectedFilters, $idLang, $parent)
             $categories[$value['id_category']] = $value;
         }
 
-        $results = $filteredSearchAdapter->valueCount('id_category');
+        $categoryCount = true;
+        if (true === defined('_PS_FACETED_NEWCOUNT_') && null !== _PS_FACETED_NEWCOUNT_) {
+            $categoryCount = (bool) _PS_FACETED_NEWCOUNT_;
+        }
+        $results = $filteredSearchAdapter->valueCount('id_category', $categoryCount);
+
+        $categoriesId = [];
+        if ($categoryCount === true) {
+            $query = new \DbQuery();
+            $query->select('id_category');
+            $query->from('category');
+            $query->where('level_depth <= ' . (int) $parent->level_depth + 1);
+            $query->where('nleft > ' . $parent->nleft);
+            $query->where('nright < ' . $parent->nright);
+            $resultCategories = \Db::getInstance()->executeS($query);
+            foreach($resultCategories as $oneCategory) {
+                $categoriesId[] = $oneCategory['id_category'];
+            }
+        }
 
         foreach ($results as $key => $values) {
             $idCategory = $values['id_category'];
@@ -999,6 +1017,10 @@ private function getCategoriesBlock($filter, $selectedFilters, $idLang, $parent)
                 continue;
             }
 
+            if ($categoryCount && in_array($idCategory, $categoriesId) === false) {
+                continue;
+            }
+
             $count = $values['c'];
             $categoryArray[$idCategory] = [
                 'name' => $categories[$idCategory]['name'],