ENGCOM-1389: MAGETWO-84124: Add bundle parent/child relationship during import #104

 - Merge Pull Request magento-engcom/import-export-improvements#104 from adam-paterson/import-export-improvements:MAGETWO-84124-import-bundles-no-stock
 - Merged commits:
   1. 9cbef5e
   2. e07b074
   3. f1657b8

Author: magento-engcom-team

app/code/Magento/BundleImportExport/Model/Import/Product/Type/Bundle.php

@@ -411,6 +411,7 @@ public function saveData()
                     $this->populateExistingOptions();
                     $this->insertOptions();
                     $this->insertSelections();
+                    $this->insertParentChildRelations();
                     $this->clear();
                 }
             }
@@ -659,6 +660,32 @@ protected function insertSelections()
         return $this;
     }
 
+    /**
+     * Insert parent/child product relations
+     *
+     * @return \Magento\CatalogImportExport\Model\Import\Product\Type\AbstractType
+     */
+    private function insertParentChildRelations()
+    {
+        foreach ($this->_cachedOptions as $productId => $options) {
+            $childIds = [];
+            foreach ($options as $option) {
+                foreach ($option['selections'] as $selection) {
+                    if (!isset($selection['parent_product_id'])) {
+                        if (!isset($this->_cachedSkuToProducts[$selection['sku']])) {
+                            continue;
+                        }
+                        $childIds[] = $this->_cachedSkuToProducts[$selection['sku']];
+                    }
+                }
+
+                $this->relationsDataSaver->saveProductRelations($productId, $childIds);
+            }
+        }
+
+        return $this;
+    }
+
     /**
      * Initialize attributes parameters for all attributes' sets.
      *

app/code/Magento/BundleImportExport/Model/Import/Product/Type/Bundle/RelationsDataSaver.php

@@ -5,6 +5,9 @@
  */
 namespace Magento\BundleImportExport\Model\Import\Product\Type\Bundle;
 
+use Magento\Catalog\Model\ResourceModel\Product\Relation;
+use Magento\Framework\App\ObjectManager;
+
 /**
  * A bundle product relations (options, selections, etc.) data saver.
  *
@@ -17,13 +20,22 @@ class RelationsDataSaver
      */
     private $resource;
 
+    /**
+     * @var Relation
+     */
+    private $productRelation;
+
     /**
      * @param \Magento\Framework\App\ResourceConnection $resource
+     * @param Relation                                  $productRelation
      */
     public function __construct(
-        \Magento\Framework\App\ResourceConnection $resource
+        \Magento\Framework\App\ResourceConnection $resource,
+        Relation $productRelation = null
     ) {
-        $this->resource = $resource;
+        $this->resource        = $resource;
+        $this->productRelation = $productRelation
+            ?: ObjectManager::getInstance()->get(Relation::class);
     }
 
     /**
@@ -92,4 +104,17 @@ public function saveSelections(array $selections)
             );
         }
     }
+
+    /**
+     * Saves given parent/child relations.
+     *
+     * @param int $parentId
+     * @param array $childIds
+     *
+     * @return void
+     */
+    public function saveProductRelations($parentId, $childIds)
+    {
+        $this->productRelation->processRelations($parentId, $childIds);
+    }
 }

app/code/Magento/BundleImportExport/Test/Unit/Model/Import/Product/Type/Bundle/RelationsDataSaverTest.php

@@ -7,6 +7,7 @@
 namespace Magento\BundleImportExport\Test\Unit\Model\Import\Product\Type\Bundle;
 
 use Magento\BundleImportExport\Model\Import\Product\Type\Bundle\RelationsDataSaver;
+use Magento\Catalog\Model\ResourceModel\Product\Relation;
 use Magento\Framework\App\ResourceConnection;
 use Magento\Framework\DB\Adapter\AdapterInterface;
 
@@ -30,6 +31,11 @@ class RelationsDataSaverTest extends \PHPUnit\Framework\TestCase
      */
     private $connectionMock;
 
+    /**
+     * @var Relation|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $productRelationMock;
+
     protected function setUp()
     {
         $helper = new \Magento\Framework\TestFramework\Unit\Helper\ObjectManager($this);
@@ -39,12 +45,16 @@ protected function setUp()
         $this->connectionMock = $this->getMockBuilder(AdapterInterface::class)
             ->disableOriginalConstructor()
             ->getMock();
-        $this->resourceMock->expects($this->once())->method('getConnection')->willReturn($this->connectionMock);
+
+        $this->productRelationMock = $this->getMockBuilder(Relation::class)
+            ->disableOriginalConstructor()
+            ->getMock();
 
         $this->relationsDataSaver = $helper->getObject(
             RelationsDataSaver::class,
             [
-                'resource' => $this->resourceMock
+                'resource' => $this->resourceMock,
+                'productRelation' => $this->productRelationMock
             ]
         );
     }
@@ -53,7 +63,7 @@ public function testSaveOptions()
     {
         $options = [1, 2];
         $table_name= 'catalog_product_bundle_option';
-
+        $this->resourceMock->expects($this->once())->method('getConnection')->willReturn($this->connectionMock);
         $this->resourceMock->expects($this->once())
             ->method('getTableName')
             ->with('catalog_product_bundle_option')
@@ -78,6 +88,7 @@ public function testSaveOptionValues()
         $optionsValues = [1, 2];
         $table_name= 'catalog_product_bundle_option_value';
 
+        $this->resourceMock->expects($this->once())->method('getConnection')->willReturn($this->connectionMock);
         $this->resourceMock->expects($this->once())
             ->method('getTableName')
             ->with('catalog_product_bundle_option_value')
@@ -98,6 +109,7 @@ public function testSaveSelections()
         $selections = [1, 2];
         $table_name= 'catalog_product_bundle_selection';
 
+        $this->resourceMock->expects($this->once())->method('getConnection')->willReturn($this->connectionMock);
         $this->resourceMock->expects($this->once())
             ->method('getTableName')
             ->with('catalog_product_bundle_selection')
@@ -121,4 +133,16 @@ public function testSaveSelections()
 
         $this->relationsDataSaver->saveSelections($selections);
     }
+
+    public function testSaveProductRelations()
+    {
+        $parentId = 1;
+        $children = [2, 3];
+
+        $this->productRelationMock->expects($this->once())
+            ->method('processRelations')
+            ->with($parentId, $children);
+
+        $this->relationsDataSaver->saveProductRelations($parentId, $children);
+    }
 }