Elep

<?php
/**
 * @copyright	Copyright (C) 2011 Simplify Your Web, Inc. All rights reserved.
 * @license		GNU General Public License version 3 or later; see LICENSE.txt
 */

// no direct access
defined( '_JEXEC' ) or die;

use Joomla\CMS\Factory;
use Joomla\CMS\Plugin\CMSPlugin;
use Joomla\CMS\Plugin\PluginHelper;

class plgSystemBackToLNEIndex extends CMSPlugin
{
	protected $autoloadLanguage = true;

protected $app;

public function onAfterRender()
    {
    	if (!$this->app) {
    		$this->app = Factory::getApplication();
    	}

if ($this->app->isClient('administrator')) {
            return;
        }

// for the case the article is shown in popup or print
        if ($this->app->input->getString('tmpl', '') == 'component') {
            return;
        }

$session = Factory::getSession();

$view = $this->app->input->get('view', '');
        $option = $this->app->input->get('option', '');

if ($option == 'com_latestnewsenhancedpro' && ($view == 'articles' || $view == 'k2items')) {

// unique variables names to avoid issues with other extensions like TCP, which use the same mechanism
            $session->set('BACKTOINDEX_LNEP_OPTION', 'com_latestnewsenhancedpro');
            //$session->set('BACKTOINDEX_LNEP_URL', Factory::getUri()->getPath()); // in multilangual environments, the value changes!

return true;
        }

// if we need to login first before accessing the article page, avoid clearing the session variables
        if ($option == 'com_users' && $view == 'login' && $this->app->input->get('return', '')) {
            return true;
        }

if (($option == 'com_content' && $view == 'article') || ($option == 'com_k2' && $view == 'item')) {

$referer_option = $session->get('BACKTOINDEX_LNEP_OPTION');
            if (!isset($referer_option)) {
                return;
            }

if ($referer_option != 'com_latestnewsenhancedpro') {
                $session->clear('BACKTOINDEX_LNEP_OPTION');
                return;
            }

$referer_url = $this->app->input->server->getString('HTTP_REFERER', '');
            if (empty($referer_url)) {
                $session->clear('BACKTOINDEX_LNEP_OPTION');
                return;
            }

$output = $this->app->getBody();

$raw_pattern = trim($this->params->get('pattern', ''));
            
            if ($raw_pattern) {
                $pattern = '#' . $raw_pattern . '#';
            } else {
            	$pattern = '#<div class="item-page#';
            	if ($this->app->input->get('option', '') == 'com_k2') {
                	$pattern = '#<div class="itemHeader#';
            	}
            }

ob_start();
            include PluginHelper::getLayoutPath('system', 'backtolneindex');
            $replacement = ob_get_clean();

if ($raw_pattern) {
                $replacement .= $raw_pattern;
            } else {
            	if ($this->app->input->get('option', '') == 'com_k2') {
                	$replacement .= '<div class="itemHeader';
            	} else {
                	$replacement .= '<div class="item-page';
            	}
            }

$output = preg_replace($pattern, $replacement, $output, 1);

$this->app->setBody($output);
        }

$session->clear('BACKTOINDEX_LNEP_OPTION');

return true;
    }
}
?>