From 93114edc28b859c5063799ea2d6c5cbcf16a9aca Mon Sep 17 00:00:00 2001
From: Danilo Argentiero <danilo.argentiero@magespecialist.it>
Date: Sat, 9 Jun 2018 15:48:24 +0200
Subject: [PATCH 1/2] Fix for issue #717

---
 .../BackOrderNotifyCustomerCondition.php      | 93 +++++++++++++++++++
 .../StockState/CheckQuoteItemQtyPlugin.php    | 19 +++-
 2 files changed, 111 insertions(+), 1 deletion(-)
 create mode 100644 app/code/Magento/InventorySales/Model/IsProductSalableCondition/BackOrderNotifyCustomerCondition.php

diff --git a/app/code/Magento/InventorySales/Model/IsProductSalableCondition/BackOrderNotifyCustomerCondition.php b/app/code/Magento/InventorySales/Model/IsProductSalableCondition/BackOrderNotifyCustomerCondition.php
new file mode 100644
index 0000000000000..d8d1538b37898
--- /dev/null
+++ b/app/code/Magento/InventorySales/Model/IsProductSalableCondition/BackOrderNotifyCustomerCondition.php
@@ -0,0 +1,93 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\InventorySales\Model\IsProductSalableCondition;
+
+use Magento\InventoryConfigurationApi\Api\Data\StockItemConfigurationInterface;
+use Magento\InventoryConfigurationApi\Api\GetStockItemConfigurationInterface;
+use Magento\InventorySalesApi\Api\Data\ProductSalabilityErrorInterfaceFactory;
+use Magento\InventorySalesApi\Api\Data\ProductSalableResultInterface;
+use Magento\InventorySalesApi\Api\Data\ProductSalableResultInterfaceFactory;
+use Magento\InventorySalesApi\Api\IsProductSalableForRequestedQtyInterface;
+use Magento\InventorySalesApi\Model\GetStockItemDataInterface;
+
+/**
+ * @inheritdoc
+ */
+class BackOrderNotifyCustomerCondition implements IsProductSalableForRequestedQtyInterface
+{
+    /**
+     * @var GetStockItemConfigurationInterface
+     */
+    private $getStockItemConfiguration;
+
+    /**
+     * @var GetStockItemDataInterface
+     */
+    private $getStockItemData;
+
+    /**
+     * @var ProductSalableResultInterfaceFactory
+     */
+    private $productSalableResultFactory;
+
+    /**
+     * @var ProductSalabilityErrorInterfaceFactory
+     */
+    private $productSalabilityErrorFactory;
+
+    /**
+     * @param GetStockItemConfigurationInterface $getStockItemConfiguration
+     */
+    public function __construct(
+        GetStockItemConfigurationInterface $getStockItemConfiguration,
+        GetStockItemDataInterface $getStockItemData,
+        ProductSalableResultInterfaceFactory $productSalableResultFactory,
+        ProductSalabilityErrorInterfaceFactory $productSalabilityErrorFactory
+    )
+    {
+        $this->getStockItemConfiguration = $getStockItemConfiguration;
+        $this->getStockItemData = $getStockItemData;
+        $this->productSalableResultFactory = $productSalableResultFactory;
+        $this->productSalabilityErrorFactory = $productSalabilityErrorFactory;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function execute(string $sku, int $stockId, float $requestedQty): ProductSalableResultInterface
+    {
+        $stockItemConfiguration = $this->getStockItemConfiguration->execute($sku, $stockId);
+        if (null === $stockItemConfiguration) {
+            $this->productSalableResultFactory->create(['errors' => []]);
+        }
+
+        if ($stockItemConfiguration->getBackorders() === StockItemConfigurationInterface::BACKORDERS_YES_NOTIFY) {
+            $stockItemData = $this->getStockItemData->execute($sku, $stockId);
+            if (null === $stockItemData) {
+                $this->productSalableResultFactory->create(['errors' => []]);
+            }
+
+            $backOrderQty = $requestedQty - $stockItemData[GetStockItemDataInterface::QUANTITY];
+            if ($backOrderQty > 0) {
+                $errors = [
+                    $this->productSalabilityErrorFactory->create([
+                            'code' => 'back_order-not-enough',
+                            'message' => __(
+                                'We don\'t have as many quantity as you requested, '
+                                . 'but we\'ll back order the remaining %1.',
+                                $backOrderQty * 1
+                            )]
+                    )
+                ];
+                return $this->productSalableResultFactory->create(['errors' => $errors]);
+            }
+        }
+
+        return $this->productSalableResultFactory->create(['errors' => []]);
+    }
+}
diff --git a/app/code/Magento/InventorySales/Plugin/StockState/CheckQuoteItemQtyPlugin.php b/app/code/Magento/InventorySales/Plugin/StockState/CheckQuoteItemQtyPlugin.php
index d758ceba4351c..0b050d86cdfba 100644
--- a/app/code/Magento/InventorySales/Plugin/StockState/CheckQuoteItemQtyPlugin.php
+++ b/app/code/Magento/InventorySales/Plugin/StockState/CheckQuoteItemQtyPlugin.php
@@ -14,6 +14,7 @@
 use Magento\Framework\Exception\NoSuchEntityException;
 use Magento\Framework\Locale\FormatInterface;
 use Magento\InventoryCatalogApi\Model\GetSkusByProductIdsInterface;
+use Magento\InventorySales\Model\IsProductSalableCondition\BackOrderNotifyCustomerCondition;
 use Magento\InventorySales\Model\IsProductSalableForRequestedQtyCondition\ProductSalabilityError;
 use Magento\InventorySalesApi\Api\Data\SalesChannelInterface;
 use Magento\InventorySalesApi\Api\IsProductSalableForRequestedQtyInterface;
@@ -52,6 +53,11 @@ class CheckQuoteItemQtyPlugin
      */
     private $storeManager;
 
+    /**
+     * @var BackOrderNotifyCustomerCondition
+     */
+    private $backOrderNotifyCustomerCondition;
+
     /**
      * @param ObjectFactory $objectFactory
      * @param FormatInterface $format
@@ -59,6 +65,7 @@ class CheckQuoteItemQtyPlugin
      * @param GetSkusByProductIdsInterface $getSkusByProductIds
      * @param StockResolverInterface $stockResolver
      * @param StoreManagerInterface $storeManager
+     * @param BackOrderNotifyCustomerCondition $backOrderNotifyCustomerCondition
      */
     public function __construct(
         ObjectFactory $objectFactory,
@@ -66,7 +73,8 @@ public function __construct(
         IsProductSalableForRequestedQtyInterface $isProductSalableForRequestedQty,
         GetSkusByProductIdsInterface $getSkusByProductIds,
         StockResolverInterface $stockResolver,
-        StoreManagerInterface $storeManager
+        StoreManagerInterface $storeManager,
+        BackOrderNotifyCustomerCondition $backOrderNotifyCustomerCondition
     ) {
         $this->objectFactory = $objectFactory;
         $this->format = $format;
@@ -74,6 +82,7 @@ public function __construct(
         $this->getSkusByProductIds = $getSkusByProductIds;
         $this->stockResolver = $stockResolver;
         $this->storeManager = $storeManager;
+        $this->backOrderNotifyCustomerCondition = $backOrderNotifyCustomerCondition;
     }
 
     /**
@@ -121,6 +130,14 @@ public function aroundCheckQuoteItemQty(
             }
         }
 
+        $productSalableResult = $this->backOrderNotifyCustomerCondition->execute($productSku, (int)$stockId, $qty);
+        if ($productSalableResult->getErrors()) {
+            /** @var ProductSalabilityError $error */
+            foreach ($productSalableResult->getErrors() as $error) {
+                $result->setMessage($error->getMessage());
+            }
+        }
+
         return $result;
     }
 

From 9818a9b8978fde4cf7f03f058c4b46ffa3443451 Mon Sep 17 00:00:00 2001
From: Francesco Pisello <francesco.pisello@magespecialist.it>
Date: Sun, 10 Jun 2018 09:49:17 +0200
Subject: [PATCH 2/2] Fix phpcs

---
 .../BackOrderNotifyCustomerCondition.php                    | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/app/code/Magento/InventorySales/Model/IsProductSalableCondition/BackOrderNotifyCustomerCondition.php b/app/code/Magento/InventorySales/Model/IsProductSalableCondition/BackOrderNotifyCustomerCondition.php
index d8d1538b37898..ab2d09ea32ce9 100644
--- a/app/code/Magento/InventorySales/Model/IsProductSalableCondition/BackOrderNotifyCustomerCondition.php
+++ b/app/code/Magento/InventorySales/Model/IsProductSalableCondition/BackOrderNotifyCustomerCondition.php
@@ -48,8 +48,7 @@ public function __construct(
         GetStockItemDataInterface $getStockItemData,
         ProductSalableResultInterfaceFactory $productSalableResultFactory,
         ProductSalabilityErrorInterfaceFactory $productSalabilityErrorFactory
-    )
-    {
+    ) {
         $this->getStockItemConfiguration = $getStockItemConfiguration;
         $this->getStockItemData = $getStockItemData;
         $this->productSalableResultFactory = $productSalableResultFactory;
@@ -81,8 +80,7 @@ public function execute(string $sku, int $stockId, float $requestedQty): Product
                                 'We don\'t have as many quantity as you requested, '
                                 . 'but we\'ll back order the remaining %1.',
                                 $backOrderQty * 1
-                            )]
-                    )
+                            )])
                 ];
                 return $this->productSalableResultFactory->create(['errors' => $errors]);
             }