[TASK] add template list with user function in config

Classes/UserFunc/ExtensionConfiguration.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!
+ ***************************************************************/
+
+/**
+ * Class ExtensionConfiguration
+ *
+ * @package SGalinski\SgMail\UserFunc
+ */
+class ExtensionConfiguration {
+
+	/**
+	 * Displays all registered sg mail templates for easy use with the blacklist feature
+	 *
+	 * @return string
+	 */
+	public function displayTemplates(): string {
+		$result = '';
+
+		try {
+			$registerArray = \SGalinski\SgMail\Service\MailTemplateService::getRegisterArray();
+			foreach ($registerArray as $extensionKey => $extension) {
+				/** @var array $extension */
+				foreach ($extension as $templateKey => $template) {
+					$result .= $extensionKey . '.' . $templateKey . '<br>';
+				}
+			}
+
+		} catch (Exception $exception) {
+			return 'TODO EXCEPTION MSG';
+		}
+
+		return $result;
+	}
+}

Resources/Private/Language/de.locallang.xlf

@@ -359,6 +359,10 @@ sg_comments.declined, sg_comments.approved
 
 Die Templates declined und approved der Extension sg_comments sind für alle Domains auf der schwarzen Liste</target>
 		</trans-unit>
+		<trans-unit id="configuration.templateList" approved="yes">
+			<source>List of templates</source>
+			<target>Liste aller templates</target>
+		</trans-unit>
 		<trans-unit id="mlang_labels_tabdescr" approved="yes">
 			<source>Mail Templates</source>
 			<target>Mail-Templates</target>

Resources/Private/Language/locallang.xlf

@@ -265,6 +265,9 @@ The templates declined and approved of the sg_comments extension are blacklisted
 
 </source>
 		</trans-unit>
+		<trans-unit id="configuration.templateList">
+			<source>List of templates</source>
+		</trans-unit>
 		<trans-unit id="mlang_labels_tabdescr">
 			<source>Mail Templates</source>
 		</trans-unit>

ext_conf_template.txt

@@ -3,3 +3,6 @@ excludeTemplatesAllDomains =
 
 # cat=general; type=string; label=LLL:EXT:sg_mail/Resources/Private/Language/locallang.xlf:configuration.excludeTemplates
 excludeTemplates =
+
+# cat=general; type=user[EXT:sg_mail/Classes/UserFunc/ExtensionConfiguration.php:ExtensionConfiguration->displayTemplates]; label=LLL:EXT:sg_mail/Resources/Private/Language/locallang.xlf:configuration.templateList
+templates =
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