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typo3/sysext/extensionmanager/Classes/Controller/UpdateScriptController.php

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+<?php
+namespace TYPO3\CMS\Extensionmanager\Controller;
+
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+use TYPO3\CMS\Backend\Template\Components\ButtonBar;
+use TYPO3\CMS\Backend\View\BackendTemplateView;
+use TYPO3\CMS\Core\Imaging\Icon;
+use TYPO3\CMS\Extbase\Mvc\View\ViewInterface;
+
+/**
+ * Controller for configuration related actions.
+ * @internal This class is a specific controller implementation and is not considered part of the Public TYPO3 API.
+ */
+class UpdateScriptController extends AbstractModuleController
+{
+    /**
+     * Set up the doc header properly here
+     *
+     * @param ViewInterface $view
+     */
+    protected function initializeView(ViewInterface $view)
+    {
+        if ($view instanceof BackendTemplateView) {
+            /** @var BackendTemplateView $view */
+            parent::initializeView($view);
+            $this->generateMenu();
+            $this->registerDocheaderButtons();
+        }
+    }
+
+    /**
+     * Show the content of the update script (if any).
+     *
+     * @param string $extensionKey Extension key
+     * @throws \TYPO3\CMS\Extensionmanager\Exception\ExtensionManagerException
+     */
+    public function showAction($extensionKey)
+    {
+        /** @var \TYPO3\CMS\Extensionmanager\Utility\UpdateScriptUtility $updateScriptUtility */
+        $updateScriptUtility = $this->objectManager->get(\TYPO3\CMS\Extensionmanager\Utility\UpdateScriptUtility::class);
+        $updateScriptResult = $updateScriptUtility->executeUpdateIfNeeded($extensionKey);
+        $this->view
+            ->assign('updateScriptResult', $updateScriptResult)
+            ->assign('extensionKey', $extensionKey);
+    }
+
+    /**
+     * Registers the Icons into the docheader
+     *
+     * @throws \InvalidArgumentException
+     */
+    protected function registerDocheaderButtons()
+    {
+        /** @var ButtonBar $buttonBar */
+        $buttonBar = $this->view->getModuleTemplate()->getDocHeaderComponent()->getButtonBar();
+
+        $uriBuilder = $this->controllerContext->getUriBuilder();
+
+        $uri = $uriBuilder->reset()->uriFor('index', [], 'List');
+        $title = $this->translate('extConfTemplate.backToList');
+        $icon = $this->view->getModuleTemplate()->getIconFactory()->getIcon('actions-view-go-back', Icon::SIZE_SMALL);
+        $button = $buttonBar->makeLinkButton()
+            ->setHref($uri)
+            ->setTitle($title)
+            ->setIcon($icon);
+        $buttonBar->addButton($button, ButtonBar::BUTTON_POSITION_LEFT);
+    }
+}