Merge pull request #400 from magento-frontend/MAGETWO-55594-2.2

Bugs
MAGETWO-55594 Urgent - Opening product in Admin is very slow

Author: VladimirZaets

app/code/Magento/Catalog/Test/Unit/Ui/DataProvider/Product/Form/Modifier/CategoriesTest.php

@@ -8,6 +8,7 @@
 use Magento\Catalog\Ui\DataProvider\Product\Form\Modifier\Categories;
 use Magento\Catalog\Model\ResourceModel\Category\CollectionFactory as CategoryCollectionFactory;
 use Magento\Catalog\Model\ResourceModel\Category\Collection as CategoryCollection;
+use Magento\Framework\App\CacheInterface;
 use Magento\Framework\DB\Helper as DbHelper;
 use Magento\Framework\UrlInterface;
 use Magento\Store\Model\Store;
@@ -112,4 +113,38 @@ public function testModifyMeta()
 
         $this->assertArrayHasKey($groupCode, $this->getModel()->modifyMeta($meta));
     }
+
+    public function testModifyMetaWithCaching()
+    {
+        $this->arrayManagerMock->expects($this->exactly(2))
+            ->method('findPath')
+            ->willReturn(true);
+        $cacheManager = $this->getMockBuilder(CacheInterface::class)
+            ->getMockForAbstractClass();
+        $cacheManager->expects($this->once())
+            ->method('load')
+            ->with(Categories::CATEGORY_TREE_ID . '_');
+        $cacheManager->expects($this->once())
+            ->method('save');
+        
+        $modifier = $this->createModel();
+        $cacheContextProperty = new \ReflectionProperty(
+            Categories::class,
+            'cacheManager'
+        );
+        $cacheContextProperty->setAccessible(true);
+        $cacheContextProperty->setValue($modifier, $cacheManager);
+
+        $groupCode = 'test_group_code';
+        $meta = [
+            $groupCode => [
+                'children' => [
+                    'category_ids' => [
+                        'sortOrder' => 10,
+                    ],
+                ],
+            ],
+        ];
+        $modifier->modifyMeta($meta);
+    }
 }

app/code/Magento/Catalog/Ui/DataProvider/Product/Form/Modifier/Categories.php

@@ -7,16 +7,25 @@
 
 use Magento\Catalog\Model\Locator\LocatorInterface;
 use Magento\Catalog\Model\ResourceModel\Category\CollectionFactory as CategoryCollectionFactory;
+use Magento\Framework\App\ObjectManager;
+use Magento\Framework\App\CacheInterface;
 use Magento\Framework\DB\Helper as DbHelper;
 use Magento\Catalog\Model\Category as CategoryModel;
 use Magento\Framework\UrlInterface;
 use Magento\Framework\Stdlib\ArrayManager;
 
 /**
  * Data provider for categories field of product page
+ * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
  */
 class Categories extends AbstractModifier
 {
+    /**#@+
+     * Category tree cache id
+     */
+    const CATEGORY_TREE_ID = 'CATALOG_PRODUCT_CATEGORY_TREE';
+    /**#@-*/
+
     /**
      * @var CategoryCollectionFactory
      */
@@ -29,6 +38,7 @@ class Categories extends AbstractModifier
 
     /**
      * @var array
+     * @deprecated
      */
     protected $categoriesTrees = [];
 
@@ -47,6 +57,11 @@ class Categories extends AbstractModifier
      */
     protected $arrayManager;
 
+    /**
+     * @var CacheInterface
+     */
+    private $cacheManager;
+
     /**
      * @param LocatorInterface $locator
      * @param CategoryCollectionFactory $categoryCollectionFactory
@@ -68,6 +83,21 @@ public function __construct(
         $this->arrayManager = $arrayManager;
     }
 
+    /**
+     * Retrieve cache interface
+     *
+     * @return CacheInterface
+     * @deprecated
+     */
+    private function getCacheManager()
+    {
+        if (!$this->cacheManager) {
+            $this->cacheManager = ObjectManager::getInstance()
+                ->get(CacheInterface::class);
+        }
+        return $this->cacheManager;
+    }
+
     /**
      * {@inheritdoc}
      */
@@ -254,8 +284,9 @@ protected function customizeCategoriesField(array $meta)
      */
     protected function getCategoriesTree($filter = null)
     {
-        if (isset($this->categoriesTrees[$filter])) {
-            return $this->categoriesTrees[$filter];
+        $categoryTree = $this->getCacheManager()->load(self::CATEGORY_TREE_ID . '_' . $filter);
+        if ($categoryTree) {
+            return unserialize($categoryTree);
         }
 
         $storeId = $this->locator->getStore()->getId();
@@ -307,9 +338,16 @@ protected function getCategoriesTree($filter = null)
             $categoryById[$category->getId()]['label'] = $category->getName();
             $categoryById[$category->getParentId()]['optgroup'][] = &$categoryById[$category->getId()];
         }
+        
+        $this->getCacheManager()->save(
+            serialize($categoryById[CategoryModel::TREE_ROOT_ID]['optgroup']),
+            self::CATEGORY_TREE_ID . '_' . $filter,
+            [
+                \Magento\Catalog\Model\Category::CACHE_TAG,
+                \Magento\Framework\App\Cache\Type\Block::CACHE_TAG
+            ]
+        );
 
-        $this->categoriesTrees[$filter] = $categoryById[CategoryModel::TREE_ROOT_ID]['optgroup'];
-
-        return $this->categoriesTrees[$filter];
+        return $categoryById[CategoryModel::TREE_ROOT_ID]['optgroup'];
     }
 }

app/code/Magento/Ui/view/base/web/js/form/components/fieldset.js

@@ -19,6 +19,9 @@ define([
             level: 0,
             visible: true,
             disabled: false,
+            listens: {
+                'opened': 'onVisibilityChange'
+            },
             additionalClasses: {}
         },
 
@@ -30,7 +33,19 @@ define([
             _.bindAll(this, 'onChildrenUpdate', 'onChildrenError', 'onContentLoading');
 
             return this._super()
-                       ._setClasses();
+                ._setClasses();
+        },
+
+        /**
+         * Initializes components' configuration.
+         *
+         * @returns {Fieldset} Chainable.
+         */
+        initConfig: function () {
+            this._super();
+            this._wasOpened = this.opened || !this.collapsible;
+
+            return this;
         },
 
         /**
@@ -117,6 +132,17 @@ define([
             return this;
         },
 
+        /**
+         * Handler of the "opened" property changes.
+         *
+         * @param {Boolean} isOpened
+         */
+        onVisibilityChange: function (isOpened) {
+            if (!this._wasOpened) {
+                this._wasOpened = isOpened;
+            }
+        },
+
         /**
          * Is being invoked on children validation error.
          * Sets error property to one incoming.