script.php

<?php
/**
 * @package    jinterventionimage
 * @author     Dmitry Tsymbal <cymbal@delo-design.ru>
 * @copyright  Copyright © 2019 Delo Design. All rights reserved.
 * @license    GNU General Public License version 3 or later; see license.txt
 * @link       https://delo-design.ru
 */
use Joomla\CMS\Application\AdministratorApplication;
use Joomla\CMS\Factory;
use Joomla\CMS\Installer\InstallerAdapter;
use Joomla\CMS\Installer\InstallerScriptInterface;
use Joomla\CMS\Language\Text;
use Joomla\Database\DatabaseDriver;
use Joomla\DI\Container;
use Joomla\DI\ServiceProviderInterface;
use Joomla\CMS\Version;

defined('_JEXEC') or die;

return new class () implements ServiceProviderInterface {
	public function register(Container $container)
	{
		$container->set(InstallerScriptInterface::class, new class ($container->get(AdministratorApplication::class)) implements InstallerScriptInterface {

			/**
			 * The application object
			 *
			 * @var  AdministratorApplication
			 *
			 * @since  1.0.0
			 */
			protected AdministratorApplication $app;

			/**
			 * The Database object.
			 *
			 * @var   DatabaseDriver
			 *
			 * @since  1.0.0
			 */
			protected DatabaseDriver $db;

			/**
			 * Minimum Joomla version required to install the extension.
			 *
			 * @var  string
			 *
			 * @since  1.0.0
			 */
			protected string $minimumJoomla = '4.2.7';

			/**
			 * Minimum PHP version required to install the extension.
			 *
			 * @var  string
			 *
			 * @since  1.0.0
			 */
			protected string $minimumPhp = '8.1';

			/**
			 * Constructor.
			 *
			 * @param   AdministratorApplication  $app  The application object.
			 *
			 * @since 1.0.0
			 */
			public function __construct(AdministratorApplication $app)
			{
				$this->app = $app;
				$this->db  = Factory::getContainer()->get('DatabaseDriver');
			}

			/**
			 * This method is called after a component is installed.
			 *
			 * @param   \stdClass  $installer  - Parent object calling this method.
			 *
			 * @return void
			 */
			public function install(InstallerAdapter $adapter): bool
			{

				return true;

			}

			/**
			 * Function called after the extension is uninstalled.
			 *
			 * @param   InstallerAdapter  $adapter  The adapter calling this method
			 *
			 * @return  boolean  True on success
			 *
			 * @since   1.0.0
			 */
			public function uninstall(InstallerAdapter $adapter): bool
			{

				return true;
			}

			/**
			 * Function called after the extension is updated.
			 *
			 * @param   InstallerAdapter  $adapter  The adapter calling this method
			 *
			 * @return  boolean  True on success
			 *
			 * @since   1.0.0
			 */
			public function update(InstallerAdapter $adapter): bool
			{

				return true;

			}

			/**
			 * Function called before extension installation/update/removal procedure commences.
			 *
			 * @param   string            $type     The type of change (install or discover_install, update, uninstall)
			 * @param   InstallerAdapter  $adapter  The adapter calling this method
			 *
			 * @return  boolean  True on success
			 *
			 * @since   1.0.0
			 */
			public function preflight(string $type, InstallerAdapter $adapter): bool
			{

				// Check compatible
                if (!$this->checkCompatible($adapter->getElement()))
                {
                    return false;
                }

                return true;

			}


			/**
			 * Function called after extension installation/update/removal procedure commences.
			 *
			 * @param   string            $type     The type of change (install or discover_install, update, uninstall)
			 * @param   InstallerAdapter  $adapter  The adapter calling this method
			 *
			 * @return  boolean  True on success
			 *
			 * @since   1.0.0
			 */
			public function postflight(string $type, InstallerAdapter $adapter): bool
			{
				return true;
			}

			/**
             * Method to check compatible.
             *
             * @throws  Exception
             *
             * @return  boolean True on success, False on failure.
             *
             * @since  1.0.0
             */
            protected function checkCompatible(string $element): bool
            {
                $element = strtoupper($element);
                // Check joomla version
                if (!(new Version)->isCompatible($this->minimumJoomla))
                {
                    $this->app->enqueueMessage(
                        Text::sprintf($element.'_ERROR_COMPATIBLE_JOOMLA', $this->minimumJoomla),
                        'error'
                    );

                    return false;
                }

                // Check PHP
                if (!(version_compare(PHP_VERSION, $this->minimumPhp) >= 0))
                {
                    $this->app->enqueueMessage(
                        Text::sprintf($element.'_ERROR_COMPATIBLE_PHP', $this->minimumPhp),
                        'error'
                    );

                    return false;
                }

                return true;
            }

		});
	}
};