script.php

<?php
/**
* CG Auto Archive Plugin  - Joomla 4.x/5.x plugin 
* Version			: 1.0.1
* copyright 		: Copyright (C) 2022 ConseilGouz. All rights reserved.
* license    		: http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
*/
// No direct access to this file
defined('_JEXEC') or die;
use Joomla\CMS\Factory;
use Joomla\CMS\Language\Text;
use Joomla\Filesystem\Folder;
use Joomla\CMS\Version;
use Joomla\Filesystem\File;
use Joomla\CMS\Log\Log;

class plgtaskcgautoarchiveInstallerScript
{
	private $min_joomla_version      = '4.0.0';
	private $min_php_version         = '8.0';
	private $name                    = 'Plugin CG AutoArchive';
	private $exttype                 = 'plugin';
	private $extname                 = 'cgautoarchive';
	private $previous_version        = '';
	private $dir           = null;
	private $lang;
	private $installerName = 'plgtaskcgautoarchiveinstaller';
	public function __construct()
	{
		$this->dir = __DIR__;
		$this->lang = Factory::getLanguage();
		$this->lang->load($this->extname);
	}

    function preflight($type, $parent)
    {
		if ( ! $this->passMinimumJoomlaVersion())
		{
			$this->uninstallInstaller();
			return false;
		}

		if ( ! $this->passMinimumPHPVersion())
		{
			$this->uninstallInstaller();
			return false;
		}
		// To prevent installer from running twice if installing multiple extensions
		if ( ! file_exists($this->dir . '/' . $this->installerName . '.xml'))
		{
			return true;
		}
    }
    
    function postflight($type, $parent)
    {
		if (($type=='install') || ($type == 'update')) { // remove obsolete dir/files
			$this->postinstall_cleanup();
		}

		switch ($type) {
            case 'install': $message = Text::_('ISO_POSTFLIGHT_INSTALLED'); break;
            case 'uninstall': $message = Text::_('ISO_POSTFLIGHT_UNINSTALLED'); break;
            case 'update': $message = Text::_('ISO_POSTFLIGHT_UPDATED'); break;
            case 'discover_install': $message = Text::_('ISO_POSTFLIGHT_DISC_INSTALLED'); break;
        }
		return true;
    }
	private function postinstall_cleanup() {

		$db = Factory::getDbo();
        $conditions = array(
            $db->qn('type') . ' = ' . $db->q('plugin'),
            $db->qn('element') . ' = ' . $db->quote('cgautoarchive')
        );
        $fields = array($db->qn('enabled') . ' = 1');

        $query = $db->getQuery(true);
		$query->update($db->quoteName('#__extensions'))->set($fields)->where($conditions);
		$db->setQuery($query);
        try {
	        $db->execute();
        }
        catch (RuntimeException $e) {
            Log::add('unable to enable plugin cg autoarchive', Log::ERROR, 'jerror');
        }

	}

	// Check if Joomla version passes minimum requirement
	private function passMinimumJoomlaVersion()
	{
		$j = new Version();
		$version=$j->getShortVersion(); 
		if (version_compare($version, $this->min_joomla_version, '<'))
		{
			Factory::getApplication()->enqueueMessage(
				'Incompatible Joomla version : found <strong>' . $version . '</strong>, Minimum : <strong>' . $this->min_joomla_version . '</strong>',
				'error'
			);

			return false;
		}

		return true;
	}

	// Check if PHP version passes minimum requirement
	private function passMinimumPHPVersion()
	{

		if (version_compare(PHP_VERSION, $this->min_php_version, '<'))
		{
			Factory::getApplication()->enqueueMessage(
					'Incompatible PHP version : found  <strong>' . PHP_VERSION . '</strong>, Minimum <strong>' . $this->min_php_version . '</strong>',
				'error'
			);
			return false;
		}

		return true;
	}
	private function uninstallInstaller()
	{
		if ( ! is_dir(JPATH_PLUGINS . '/system/' . $this->installerName)) {
			return;
		}
		$this->delete([
			JPATH_PLUGINS . '/system/' . $this->installerName . '/language',
			JPATH_PLUGINS . '/system/' . $this->installerName,
		]);
		$db = Factory::getDbo();
		$query = $db->getQuery(true)
			->delete('#__extensions')
			->where($db->quoteName('element') . ' = ' . $db->quote($this->installerName))
			->where($db->quoteName('folder') . ' = ' . $db->quote('system'))
			->where($db->quoteName('type') . ' = ' . $db->quote('plugin'));
		$db->setQuery($query);
		$db->execute();
		Factory::getCache()->clean('_system');
	}
	
}