MAGETWO-66480: [GITHUB] URL key for specified store already exists #6671

- adding observer for notice on controller

Author: cpartica

app/code/Magento/CatalogUrlRewrite/Observer/DuplicateUrlControllerAfterSaveObserver.php

@@ -0,0 +1,62 @@
+<?php
+/**
+ * Copyright © 2013-2017 Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento\CatalogUrlRewrite\Observer;
+
+use Magento\Framework\Event\ObserverInterface;
+use Magento\Framework\Message\ManagerInterface;
+use Magento\Framework\Escaper;
+
+class DuplicateUrlControllerAfterSaveObserver implements ObserverInterface
+{
+    /**
+     * @var \Magento\Framework\Message\ManagerInterface
+     */
+    private $messageManager;
+
+    /**
+     * @var Escaper
+     */
+    private $escaper;
+
+    /**
+     * @param ManagerInterface $messageManager
+     * @param Escaper $escaper
+     */
+    public function __construct(
+        ManagerInterface $messageManager,
+        Escaper $escaper
+    ) {
+        $this->messageManager = $messageManager;
+        $this->escaper = $escaper;
+    }
+
+    /**
+     * Add url collisions notices
+     *
+     * @param \Magento\Framework\Event\Observer $observer
+     * @return void
+     */
+    public function execute(\Magento\Framework\Event\Observer $observer)
+    {
+        /** @var \Magento\Catalog\Model\Product $product */
+        $product = $observer->getEvent()->getProduct();
+        if ($product->getData('unsaved_urls')) {
+            $urls = '';
+            foreach ($product->getData('unsaved_urls') as $url) {
+                /** @var \Magento\UrlRewrite\Service\V1\Data\UrlRewrite $url */
+                $urls .= $url->getRequestPath() . ', ';
+            }
+            $urls = rtrim($urls, ', ');
+            $this->messageManager->addNoticeMessage(
+                __(
+                    'The following urls have not been saved for product %1: %2',
+                    $this->escaper->escapeHtml($product->getName()),
+                    $this->escaper->escapeHtml($urls)
+                )
+            );
+        }
+    }
+}