[BUGFIX] Cleanup / Ensure compat to PHP 7.0

Classes/Controller/YoutubeController.php

@@ -28,7 +28,6 @@ use TYPO3\CMS\Extbase\Mvc\Controller\ActionController;
  *  The Youtube Controller
  */
 class YoutubeController extends ActionController {
-
 	/**
 	 * @var YoutubeService
 	 */

Classes/Service/YoutubeService.php

@@ -32,12 +32,12 @@ use InvalidArgumentException;
  * Helper functions
  */
 class YoutubeService {
-	protected const API_URL = 'https://www.googleapis.com/youtube/v3/';
-	protected const API_CHANNEL = 'search';
-	protected const API_PLAYLIST = 'playlistItems';
-	protected const API_VIDEO = 'videos';
-	protected const API_PART = 'snippet';
-	protected const API_ORDER_BY = 'date';
+	const API_URL = 'https://www.googleapis.com/youtube/v3/';
+	const API_CHANNEL = 'search';
+	const API_PLAYLIST = 'playlistItems';
+	const API_VIDEO = 'videos';
+	const API_PART = 'snippet';
+	const API_ORDER_BY = 'date';
 
 	/**
 	 * @param string $youtubeId

Configuration/FlexForms/flexform_sgyoutube_youtube.xml

 <T3DataStructure>
-    <meta>
-        <langDisable>1</langDisable>
-        <langChildren>1</langChildren>
-    </meta>
-    <sheets>
+	<meta>
+		<langDisable>1</langDisable>
+		<langChildren>1</langChildren>
+	</meta>
+	<sheets>
 
-        <sDEF>
-            <ROOT>
-                <TCEforms>
-                    <sheetTitle>LLL:EXT:sg_youtube/Resources/Private/Language/locallang.xlf:settings
-                    </sheetTitle>
-                </TCEforms>
-                <type>array</type>
-                <el>
-                    <settings.id>
-                        <TCEforms>
-                            <exclude>0</exclude>
-                            <label>LLL:EXT:sg_youtube/Resources/Private/Language/locallang.xlf:id
-                            </label>
+		<sDEF>
+			<ROOT>
+				<TCEforms>
+					<sheetTitle>LLL:EXT:sg_youtube/Resources/Private/Language/locallang.xlf:settings
+					</sheetTitle>
+				</TCEforms>
+				<type>array</type>
+				<el>
+					<settings.id>
+						<TCEforms>
+							<exclude>0</exclude>
+							<label>LLL:EXT:sg_youtube/Resources/Private/Language/locallang.xlf:id
+							</label>
 							<config>
 								<type>input</type>
 								<size>30</size>
 								<eval>trim,required</eval>
 							</config>
-                        </TCEforms>
-                    </settings.id>
-                    <settings.maxResults>
-                        <TCEforms>
-                            <exclude>0</exclude>
-                            <label>LLL:EXT:sg_youtube/Resources/Private/Language/locallang.xlf:maxResults
-                            </label>
+						</TCEforms>
+					</settings.id>
+					<settings.maxResults>
+						<TCEforms>
+							<exclude>0</exclude>
+							<label>LLL:EXT:sg_youtube/Resources/Private/Language/locallang.xlf:maxResults
+							</label>
 							<config>
 								<type>input</type>
 								<size>30</size>
-                                <default>10</default>
+								<default>10</default>
 								<eval>trim,int</eval>
-                                <range>
-                                    <lower>1</lower>
-                                    <upper>50</upper>
-                                </range>
+								<range>
+									<lower>1</lower>
+									<upper>50</upper>
+								</range>
 							</config>
-                        </TCEforms>
-                    </settings.maxResults>
-                </el>
-            </ROOT>
-        </sDEF>
-    </sheets>
+						</TCEforms>
+					</settings.maxResults>
+				</el>
+			</ROOT>
+		</sDEF>
+	</sheets>
 </T3DataStructure>

Configuration/TCA/Overrides/tt_content.php

 <?php
 
-/***************************************************************
- *  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!
- ***************************************************************/
-
 $GLOBALS['TCA']['tt_content']['types']['list']['subtypes_addlist']['sgyoutube_youtube'] = 'pi_flexform';
-\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPiFlexFormValue('sgyoutube_youtube', 'FILE:EXT:sg_youtube/Configuration/FlexForms/flexform_sgyoutube_youtube.xml');
+\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPiFlexFormValue(
+	'sgyoutube_youtube', 'FILE:EXT:sg_youtube/Configuration/FlexForms/flexform_sgyoutube_youtube.xml'
+);

Configuration/TypoScript/constants.typoscript

@@ -3,6 +3,7 @@ plugin.tx_sgyoutube {
 		# cat=plugin.tx_sgyoutube/file; type=string; label=YouTube API Key
 		apiKey =
 	}
+
 	view {
 		# cat=plugin.tx_sgyoutube/file; type=string; label=Path to template root (FE)
 		templateRootPath = EXT:sg_youtube/Resources/Private/Templates/

Configuration/TypoScript/setup.typoscript

@@ -2,15 +2,18 @@ plugin.tx_sgyoutube {
 	settings {
 		apiKey = {$plugin.tx_sgyoutube.settings.apiKey}
 	}
+
 	view {
 		templateRootPaths {
 			0 = EXT:sg_youtube/Resources/Private/Templates/
 			1 = {$plugin.tx_sgyoutube.view.templateRootPath}
 		}
+
 		partialRootPaths {
 			0 = EXT:sg_youtube/Resources/Private/Partials/
 			1 = {$plugin.tx_sgyoutube.view.partialRootPath}
 		}
+
 		layoutRootPaths {
 			0 = EXT:sg_youtube/Resources/Private/Layouts/
 			1 = {$plugin.tx_sgyoutube.view.layoutRootPath}

README.md

 # Ext: sg_youtube
 
-<img src="https://www.sgalinski.de/typo3conf/ext/project_theme/Resources/Public/Images/logo.svg" />
+<img alt="" src="https://www.sgalinski.de/typo3conf/ext/project_theme/Resources/Public/Images/logo.svg" />
 
 License: [GNU GPL, Version 2](https://www.gnu.org/licenses/gpl-2.0.html)
 
@@ -12,7 +12,7 @@ TYPO3 version: >8.7
 
 ## Installation / Integration
 
-First install the extension and activate it in the Extension-Manager.
+First install the extension and activate it in the Extension Manager.
 
 ### TypoScript integration
 

Resources/Private/Layouts/Default.html

 <div class="tx-sg-youtube">
-    <f:render section="main"/>
+	<f:render section="main"/>
 </div>