[TASK] Typo3v8 compatibility updates

Includes CGL and other optimisation changes

Classes/Hooks/AbstractHook.php

+<?php
+
+namespace SGalinski\SgCloudFront\Hooks;
+
+/***************************************************************
+ *  Copyright notice
+ *
+ *  (c) sgalinski Internet Services (https://www.sgalinski.de)
+ *
+ *  All rights reserved
+ *
+ *  This script is part of the TYPO3 project. The TYPO3 project is
+ *  free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  The GNU General Public License can be found at
+ *  http://www.gnu.org/copyleft/gpl.html.
+ *
+ *  This script is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  This copyright notice MUST APPEAR in all copies of the script!
+ ***************************************************************/
+
+use SGalinski\SgCloudFront\Service\ResourceExtractionService;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Extbase\Object\ObjectManager;
+
+/**
+ * Class for the contentPostProc-all hook
+ */
+abstract class AbstractHook {
+	/**
+	 * @var \TYPO3\CMS\Extbase\Object\ObjectManagerInterface
+	 */
+	protected $objectManager;
+
+	/**
+	 * @var \SGalinski\SgCloudFront\Service\ResourceExtractionService
+	 */
+	protected $resourceExtractionService;
+
+	/**
+	 * @var array
+	 */
+	protected $configuration = [];
+
+	/**
+	 * Constructor
+	 *
+	 * @throws \InvalidArgumentException
+	 */
+	public function __construct() {
+		$this->objectManager = GeneralUtility::makeInstance(ObjectManager::class);
+		$this->configuration = unserialize($GLOBALS['TYPO3_CONF_VARS']['EXT']['extConf']['sg_cloud_front']);
+
+		$this->resourceExtractionService = $this->objectManager->get(ResourceExtractionService::class);
+	}
+}