first commit

plugins/quickicon/quantummanagericon/quantummanagericon.php

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+<?php
+/**
+ * @package    quantummanagericon
+ * @author     Dmitry Tsymbal <cymbal@delo-design.ru>
+ * @copyright  Copyright © 2019 Delo Design & NorrNext. All rights reserved.
+ * @license    GNU General Public License version 3 or later; see license.txt
+ * @link       https://www.norrnext.com
+ */
+
+defined('_JEXEC') or die('Restricted access');
+
+use Joomla\CMS\Factory;
+
+/**
+ * Class plgQuickiconQuantummanagericon
+ */
+class plgQuickiconQuantummanagericon extends JPlugin
+{
+
+	public function onGetIcons($context)
+	{
+
+		if (
+			$context !== $this->params->get('context', 'mod_quickicon') ||
+			!Factory::getUser()->authorise('core.manage', 'com_quantummanager')
+		)
+		{
+			return;
+		}
+
+		JLoader::register('QuantummanagerHelper', JPATH_ROOT . '/administrator/components/com_quantummanager/helpers/quantummanager.php');
+
+		$icon = 'folder-open';
+
+		if (QuantummanagerHelper::isJoomla4())
+		{
+			$icon = 'icon-folder-open';
+		}
+
+		return [
+			[
+				'link'  => 'index.php?option=com_quantummanager',
+				'image' => $icon,
+				'text'  => 'Quantum Manager',
+				'id'    => 'plg_quickicon_quantummanageicon',
+			]
+		];
+	}
+
+
+}