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plugins/system/osmylicensesmanager/library/Installer/TraitInstallerCheck.php

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+<?php
+/**
+ * @package   OSEmbed
+ * @contact   www.joomlashack.com, help@joomlashack.com
+ * @copyright 2020-2021 Joomlashack.com. All rights reserved
+ * @license   https://www.gnu.org/licenses/gpl.html GNU/GPL
+ *
+ * This file is part of OSEmbed.
+ *
+ * OSEmbed 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * OSEmbed 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with OSEmbed.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+namespace Alledia\Installer;
+
+use Joomla\CMS\Factory;
+use Joomla\CMS\Installer\InstallerAdapter;
+use Joomla\CMS\Language\Text;
+
+defined('_JEXEC') or die();
+
+trait TraitInstallerCheck
+{
+    /**
+     * @var bool
+     */
+    protected $cancelInstallation = false;
+
+    /**
+     * @param InstallerAdapter $parent
+     *
+     * @return bool
+     * @throws \Exception
+     */
+    protected function checkInheritance(InstallerAdapter $parent): bool
+    {
+        Factory::getLanguage()->load('lib_shackinstaller.sys', realpath(__DIR__ . '/../..'));
+
+        $parentClasses   = class_parents($this);
+        $scriptClassName = array_pop($parentClasses);
+        $scriptClass     = new \ReflectionClass($scriptClassName);
+
+        $sourcePath    = dirname($scriptClass->getFileName());
+        $sourceBase    = strpos($sourcePath, JPATH_PLUGINS) === 0 ? 3 : 2;
+        $sourceVersion = AbstractScript::VERSION ?? '0.0.0';
+
+        $sourcePath = $this->cleanPath($sourcePath);
+        $targetPath = $this->cleanPath(SHACK_INSTALLER_BASE);
+
+        if ($sourcePath != $targetPath && version_compare($sourceVersion, SHACK_INSTALLER_COMPATIBLE , 'lt')) {
+            $source = join('/', array_slice(explode('/', $sourcePath), 0, $sourceBase));
+
+            $errorMessage = 'LIB_SHACKINSTALLER_ABORT_'
+                . ($parent->getRoute() == 'uninstall' ? 'UNINSTALL' : 'INSTALL');
+
+            Factory::getApplication()->enqueueMessage(Text::sprintf($errorMessage, $source), 'error');
+
+            $this->cancelInstallation = true;
+
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * @param string $path
+     *
+     * @return string
+     */
+    protected function cleanPath(string $path): string
+    {
+        return str_replace(DIRECTORY_SEPARATOR, '/', str_replace(JPATH_ROOT . '/', '', $path));
+    }
+}