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plugins/system/jchoptimize/jchoptimize.php

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+<?php
+
+/**
+ * JCH Optimize - Performs several front-end optimizations for fast downloads
+ *
+ * @package   jchoptimize/joomla-platform
+ * @author    Samuel Marshall <samuel@jch-optimize.net>
+ * @copyright Copyright (c) 2020 Samuel Marshall / JCH Optimize
+ * @license   GNU/GPLv3, or later. See LICENSE file
+ *
+ * If LICENSE file missing, see <http://www.gnu.org/licenses/>.
+ */
+
+use JchOptimize\ContainerFactory;
+use JchOptimize\Core\Container\Container;
+use JchOptimize\Core\Helper;
+use JchOptimize\Core\Optimize;
+use JchOptimize\Core\SystemUri;
+use JchOptimize\Model\Cache;
+use Joomla\CMS\Application\CMSApplicationInterface;
+use Joomla\CMS\Component\ComponentHelper;
+use Joomla\CMS\Factory;
+use Joomla\CMS\Plugin\CMSPlugin;
+use Joomla\CMS\Plugin\PluginHelper;
+use Joomla\Registry\Registry;
+use Psr\Log\LoggerInterface;
+
+defined('_JEXEC') or die('Restricted access');
+
+if (!defined('JCH_PLUGIN_DIR')) {
+    define('JCH_PLUGIN_DIR', dirname(__FILE__));
+}
+
+include_once JPATH_ADMINISTRATOR . '/components/com_jchoptimize/autoload.php';
+
+class plgSystemJchoptimize extends CMSPlugin
+{
+    /**
+     * If plugin is enabled
+     *
+     * @var bool
+     */
+    public bool $enabled = true;
+
+    /**
+     * Component parameters
+     *
+     * @var Registry
+     */
+    protected Registry $comParams;
+
+    /**
+     * Application object
+     *
+     * @var   ?CMSApplicationInterface
+     */
+    protected $app;
+
+    /**
+     * Container object
+     *
+     * @var Container
+     */
+    private Container $container;
+
+    /**
+     * Constructor
+     *
+     * @param $subject
+     * @param $config
+     */
+    public function __construct(&$subject, $config)
+    {
+        parent::__construct($subject, $config);
+
+        // Disable if the component is not installed or disabled
+        if (!ComponentHelper::isEnabled('com_jchoptimize')) {
+            $this->enabled = false;
+
+            return;
+        }
+
+        //Disable if we cannot initialize application
+        try {
+            $this->app = Factory::getApplication();
+        } catch (Exception $e) {
+            $this->enabled = false;
+
+            return;
+        }
+
+        //Disable if we can't get component's container
+        try {
+            $this->container = ContainerFactory::getContainer();
+        } catch (Exception $e) {
+            $this->enabled = false;
+
+            return;
+        }
+
+        //Disable if not on front end
+        if (!$this->app->isClient('site')) {
+            $this->enabled = false;
+
+            return;
+        }
+
+        //Disable if jchnooptimize set
+        if ($this->app->input->get('jchnooptimize', '', 'int') == 1) {
+            $this->enabled = false;
+
+            return;
+        }
+
+        //Disable if site offline and user is guest
+        $user = Factory::getUser();
+
+        if ($this->app->get('offline', '0') && $user->get('guest')) {
+            $this->enabled = false;
+
+            return;
+        }
+
+        //Get and set component's parameters
+        $this->comParams = $this->container->get('params');
+
+        if (!defined('JCH_DEBUG')) {
+            define('JCH_DEBUG', ($this->comParams->get('debug', 0) && JDEBUG));
+        }
+
+        if ($this->comParams->get('disable_logged_in_users', '1') && !$user->get('guest')) {
+            $this->enabled = false;
+        }
+    }
+
+    public function onAfterRoute()
+    {
+        //If already disabled return
+        if (!$this->enabled) {
+            return;
+        }
+        //Disable if in iframe
+        if ($this->app->input->server->getString('HTTP_SEC_FETCH_DEST') == 'iframe') {
+            $this->enabled = false;
+
+            return;
+        }
+
+        //Disable if menu or page excluded
+        $menuexcluded = $this->comParams->get('menuexcluded', array());
+        $menuexcludedurl = $this->comParams->get('menuexcludedurl', array());
+
+        if (in_array($this->app->input->get('Itemid', '', 'int'), $menuexcluded) ||
+            Helper::findExcludes($menuexcludedurl, SystemUri::toString())) {
+            $this->enabled = false;
+
+            return;
+        }
+
+        //Disable if page being edited
+        if ($this->app->input->get('layout') == 'edit') {
+            $this->enabled = false;
+
+            return;
+        }
+    }
+
+    /**
+     *
+     * @return boolean
+     * @throws Exception
+     */
+    public function onAfterRender()
+    {
+        if (!$this->enabled) {
+            return false;
+        }
+
+        if ($this->comParams->get('debug', 0)) {
+            error_reporting(E_ALL & ~E_NOTICE);
+        }
+
+        $html = $this->app->getBody();
+
+        //Html invalid
+        if (!Helper::validateHtml($html)) {
+            return false;
+        }
+
+        if ($this->app->input->get('jchbackend') == '1'
+            || $this->app->input->get('jchnooptimize' == '1')) {
+            return false;
+        }
+
+        if ($this->app->input->get('jchbackend') == '2') {
+            echo $html;
+            while (@ob_end_flush()) {
+                ;
+            }
+            exit;
+        }
+
+        try {
+            /** @var Optimize $optimize */
+            $optimize = $this->container->get(Optimize::class);
+            $optimize->setHtml($html);
+
+            $sOptimizedHtml = $optimize->process();
+        } catch (Exception $e) {
+            $logger = $this->container->get(LoggerInterface::class);
+            $logger->error($e->getMessage());
+
+            $sOptimizedHtml = $html;
+        }
+
+        $this->app->setBody($sOptimizedHtml);
+    }
+
+    public function onJchCacheExpired()
+    {
+        /** @var Cache $cacheModel
+         */
+        $cacheModel = $this->container->get(Cache::class);
+
+        return $cacheModel->cleanCache();
+    }
+
+    /**
+     *
+     */
+    public function onAfterDispatch()
+    {
+        //If already disabled return false
+        if (!$this->enabled) {
+            return false;
+        }
+
+        //Disable if editor loaded
+        if ($this->isEditorLoaded()) {
+            $this->enabled = false;
+
+            return false;
+        }
+    }
+
+    /**
+     * Gets the name of the current Editor
+     *
+     * @staticvar string $sEditor
+     * @return bool
+     */
+    protected function isEditorLoaded(): bool
+    {
+        $aEditors = PluginHelper::getPlugin('editors');
+
+        foreach ($aEditors as $sEditor) {
+            if (class_exists('plgEditor' . $sEditor->name, false)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}