Initial Commit

Controller/Adminhtml/Indexer.php

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+<?php
+/**
+ * Copyright © 2017 MagePal, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace MagePal\Reindex\Controller\Adminhtml;
+
+abstract class Indexer extends \Magento\Backend\App\Action
+{
+    /**
+     * Check ACL permissions
+     *
+     * @return bool
+     */
+    protected function _isAllowed()
+    {
+        switch ($this->_request->getActionName()) {
+            case 'reindexOnTheFly':
+                return $this->_authorization->isAllowed('Magento_Indexer::changeMode');
+        }
+
+        return false;
+    }
+}

Controller/Adminhtml/Indexer/ReindexOnTheFly.php

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+<?php
+/**
+ * Copyright © 2017 MagePal, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace MagePal\Reindex\Controller\Adminhtml\Indexer;
+
+use Magento\Backend\App\Action\Context;
+
+class ReindexOnTheFly extends \MagePal\Reindex\Controller\Adminhtml\Indexer
+{
+
+    /** @var \Magento\Framework\Indexer\IndexerInterface  */
+    protected $indexerFactory;
+
+    /**
+     * Index constructor.
+     * @param Context $context
+     * @param \Magento\Indexer\Model\IndexerFactory $indexerFactory
+     */
+    public function __construct(
+        Context $context,
+        \Magento\Indexer\Model\IndexerFactory $indexerFactory
+    ) {
+        $this->indexerFactory = $indexerFactory;
+        parent::__construct($context);
+    }
+
+    /**
+     * @return void
+     */
+    public function execute()
+    {
+        $indexerIds = $this->getRequest()->getParam('indexer_ids');
+        if (!is_array($indexerIds)) {
+            $this->messageManager->addError(__('Please select indexers.'));
+        } else {
+            try {
+
+                foreach ($indexerIds as $indexerId) {
+                    $indexer = $this->indexerFactory->create();
+                    $indexer->load($indexerId)->reindexAll();
+
+                }
+
+                $this->messageManager->addSuccess(__('Reindex %1 indexer(s).', count($indexerIds))
+                );
+            } catch (\Magento\Framework\Exception\LocalizedException $e) {
+                $this->messageManager->addError($e->getMessage());
+            } catch (\Exception $e) {
+                $this->messageManager->addException(
+                    $e,
+                    __("We couldn't reindex because of an error.")
+                );
+            }
+        }
+
+        $this->_redirect('*/*/list');
+    }
+}

README.md

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+## Reindex Magento 2 from Admin
+
+
+Reindex your Magento 2 store quickly and easily from backend/admin. Ideal for project managers or QA department during site development.
+
+#### 1 - Installation
+##### Manually
+ * Download the extension
+ * Unzip the file
+ * Create a folder {Magento 2 root}/app/code/MagePal/Reindex
+ * Copy the content from the unzip folder
+
+##### Using Composer
+
+```
+composer require magepal/magento2-reindex
+```
+
+#### 2 - Enable Reindex (from {Magento root} folder)
+ * php -f bin/magento module:enable --clear-static-content MagePal_Reindex
+ * php -f bin/magento setup:upgrade

composer.json

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+{
+    "name": "magepal/magento2-reindex",
+    "description": "Reindex Magento 2 from Admin",
+    "keywords": [
+        "magento 2",
+        "magento2",
+        "reindex",
+        "backend reindex",
+        "admin reindex"
+    ],
+    "require": {
+        "php": "~5.5.0|~5.6.0|~7.0.0",
+
+        "magento/magento-composer-installer": "*"
+    },
+    "suggest": {
+
+    },
+    "type": "magento2-module",
+    "version": "1.0.0",
+    "license": [
+        "OSL-3.0",
+        "AFL-3.0"
+    ],
+    "autoload": {
+        "files": [
+            "registration.php"
+        ],
+        "psr-4": {
+            "MagePal\\Reindex\\": ""
+        }
+    }
+}

etc/adminhtml/routes.xml

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+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © 2017 MagePal. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:App/etc/routes.xsd">
+    <router id="admin">
+        <route id="indexer">
+            <module name="MagePal_Reindex" after="Magento_Indexer" />
+        </route>
+    </router>
+</config>

etc/module.xml

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+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © 2017 MagePal. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
+    <module name="MagePal_Reindex" setup_version="1.0.0">
+        <module name="Magento_Indexer"/>
+    </module>
+</config>

registration.php

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+<?php
+/**
+ * Copyright © 2017 MagePal, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+\Magento\Framework\Component\ComponentRegistrar::register(
+    \Magento\Framework\Component\ComponentRegistrar::MODULE,
+    'MagePal_Reindex',
+    __DIR__
+);

view/adminhtml/layout/indexer_indexer_list_grid.xml

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+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © 2017 MagePal. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
+    <body>
+        <referenceBlock name="adminhtml.indexer.grid.grid.massaction">
+            <arguments>
+                <argument name="options" xsi:type="array">
+                    <item name="change_mode_admin_reindex" xsi:type="array">
+                        <item name="label" xsi:type="string" translate="true">Reindex</item>
+                        <item name="url" xsi:type="string">*/indexer/reindexOnTheFly</item>
+                    </item>
+                </argument>
+            </arguments>
+        </referenceBlock>
+    </body>
+</page>