script.php

<?php
/**
 * @package    Joomla.JEDChecker
 *
 * @copyright  Copyright (C) 2017 - 2019 Open Source Matters, Inc. All rights reserved.
 * 			   Copyright (C) 2008 - 2016 compojoom.com . All rights reserved.
 * @author     Daniel Dimitrov <daniel@compojoom.com>
 *
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

defined('_JEXEC') or die('Restricted access');

/**
 * Class Com_JedcheckerInstallerScript
 *
 * @since  1.5
 */
class Com_JedcheckerInstallerScript
{
	protected $extension = 'com_jedchecker';

	/**
	 * Function executed before the the installation
	 *
	 * @param   string               $type    - the installation type
	 * @param   JInstallerComponent  $parent  - the parent class
	 */
	public function preflight($type, $parent)
	{
		$this->parent = $parent;
	}

	/**
	 * Update cleans out any old rules.
	 *
	 * @param   JInstallerComponent  $parent  Is the class calling this method.
	 *
	 * @return  bool|null  If this returns false, Joomla will abort the update and undo everything already done.
	 */
	public function update($parent)
	{
		$this->loadLanguage();

		// Doing it this way in case there are other old rules to be deleted
		$oldRules = array('htmlindexes');

		foreach ($oldRules as $rule)
		{
			$rulePhpFile = JPATH_ADMINISTRATOR . '/components/' . $this->extension . '/libraries/rules/' . $rule . '.php';
			$ruleIniFile = JPATH_ADMINISTRATOR . '/components/' . $this->extension . '/libraries/rules/' . $rule . '.ini';

			// Remove the rule's php file
			if (file_exists($rulePhpFile))
			{
				if (JFile::delete($rulePhpFile))
				{
					$msg = JText::sprintf('COM_JEDCHECKER_OLD_RULE_X_PHP_FILE_REMOVED', $rule);
				}
				else
				{
					$msg = JText::sprintf('COM_JEDCHECKER_OLD_RULE_X_PHP_FILE_NOT_REMOVED', $rule);
				}

				echo "<p>$msg</p>";
			}

			// Remove the rule's ini file
			if (file_exists($ruleIniFile))
			{
				if (JFile::delete($ruleIniFile))
				{
					$msg = JText::sprintf('COM_JEDCHECKER_OLD_RULE_X_INI_FILE_REMOVED', $rule);
				}
				else
				{
					$msg = JText::sprintf('COM_JEDCHECKER_OLD_RULE_X_INI_FILE_NOT_REMOVED', $rule);
				}

				echo "<p>$msg</p>";
			}
		}
	}

	/**
	 * Load language necessary during the installation
	 *
	 * @return void
	 */
	public function loadLanguage()
	{
		$extension = $this->extension;
		$jlang = JFactory::getLanguage();
		$path = $this->parent->getParent()->getPath('source') . '/administrator';
		$jlang->load($extension, $path, 'en-GB', true);
		$jlang->load($extension, $path, $jlang->getDefault(), true);
		$jlang->load($extension, $path, null, true);
		$jlang->load($extension . '.sys', $path, 'en-GB', true);
		$jlang->load($extension . '.sys', $path, $jlang->getDefault(), true);
		$jlang->load($extension . '.sys', $path, null, true);
	}
}