script.php

<?php
/**
 * @package	jCode Syntax Highlighter
 * @author	Konstantin Kolos
 * @copyright	Copyright (C) 2019 - 2022 Jnotes.net.ua. All rights reserved
 * @contact	https://jnotes.net.ua, admin@jnotes.net.ua
 * @license	https://gnu.org/licenses/gpl-3.0.html, GNU/GPLv3
 */

defined('_JEXEC') or die;

use Joomla\CMS\Factory;
use Joomla\CMS\Installer\InstallerScript;
use Joomla\CMS\Language\Text;

/**
 * Installation class to perform additional changes during Install / Uninstall / Update
 *
 * @since 1.2.0
 */
class PlgContentjCodeSyntaxHighlighterInstallerScript extends InstallerScript
{
	const MIN_VERSION_JOOMLA = '3.9.0';
	const MIN_VERSION_PHP = '7.2.0';

	/**
	 * Name of extension that is used in the error message
	 *
	 * @var string
	 *
	 * @since 1.2.0
	 */
	protected $extensionName = 'jCode Syntax Highlighter';

	/**
	 * Extension script constructor
	 *
	 * @since 1.3.0
	 */
	public function __construct()
	{
		$this->deleteFiles = array(
			// From 1.2.1 to 1.3.0
			'/media/plg_content_jcodesyntaxhighlighter/css/linenumbers.css',
			'/media/plg_content_jcodesyntaxhighlighter/css/linenumbers-previewers.css',
			'/media/plg_content_jcodesyntaxhighlighter/css/previewers.css',
			'/media/plg_content_jcodesyntaxhighlighter/js/clipboard.min.js',
		);
	}

	/**
	 * Checks compatibility in the preflight event
	 *
	 * @param $type
	 * @param $parent
	 *
	 * @return bool
	 * @throws Exception
	 *
	 * @since 1.2.0
	 */
	public function preflight($type, $parent)
	{
		if (!$this->checkVersionJoomla())
		{
			return false;
		}

		if (!$this->checkVersionPhp())
		{
			return false;
		}

		return true;
	}

	/**
	 * Function to perform changes during postflight
	 *
	 * @param string            $type    The action being performed
	 * @param ComponentAdapter  $parent  The class calling this method
	 *
	 * @return void
	 *
	 * @since 1.3.0
	 */
	public function postflight($type, $parent)
	{
		$this->removeFiles();
	}

	/**
	 * Checking the used version of Joomla
	 *
	 * @return bool
	 * @throws Exception
	 *
	 * @since 1.2.0
	 */
	private function checkVersionJoomla()
	{
		$version = new JVersion();

		if (!$version->isCompatible(self::MIN_VERSION_JOOMLA))
		{
			Factory::getApplication()->enqueueMessage(Text::sprintf('JN_ERROR_JOOMLA_VERSION', $this->extensionName, self::MIN_VERSION_JOOMLA), 'error');

			return false;
		}

		return true;
	}

	/**
	 * Checking the used version of PHP
	 *
	 * @return bool
	 * @throws Exception
	 *
	 * @since 1.2.0
	 */
	private function checkVersionPhp()
	{
		if (!version_compare(phpversion(), self::MIN_VERSION_PHP, 'ge'))
		{
			Factory::getApplication()->enqueueMessage(Text::sprintf('JN_ERROR_PHP_VERSION', $this->extensionName, self::MIN_VERSION_PHP), 'error');

			return false;
		}

		return true;
	}
}