<?php
/**
 * @package 	Helix_Ultimate_Framework
 * @author 		JoomShaper <joomshaper@js.com>
 * @copyright 	Copyright (c) 2010 - 2025 JoomShaper
 * @license 	http://www.gnu.org/licenses/gpl-2.0.html GNU/GPLv2 or Later
 */

defined('_JEXEC') or die();

/**
 * Bootstrap php file.
 * This is responsible for auto-loading php classes.
 *
 * @since 2.0.0
 */
require_once __DIR__ . '/bootstrap.php';

use HelixUltimate\Framework\Core\HelixUltimate;
use HelixUltimate\Framework\Platform\Blog;
use HelixUltimate\Framework\Platform\Helper;
use HelixUltimate\Framework\Platform\Media;
use HelixUltimate\Framework\Platform\Platform;
use HelixUltimate\Framework\System\JoomlaBridge;
use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\Form\Form;
use Joomla\CMS\Helper\MediaHelper;
use Joomla\CMS\HTML\HTMLHelper;
use Joomla\CMS\Plugin\CMSPlugin;
use Joomla\CMS\Response\JsonResponse;
use Joomla\CMS\Router\Route;
use Joomla\CMS\Uri\Uri;
use Joomla\Database\DatabaseInterface;
use Joomla\Registry\Registry;
use Joomla\CMS\Table\Table;

// Constant definition
define('HELIX_LAYOUTS_PATH', JPATH_PLUGINS . '/system/helixultimate/layouts');
define('HELIX_LAYOUT_PATH', JPATH_PLUGINS . '/system/helixultimate/layout');

/**
 * Class for System Plugin HelixUltimate.
 *
 * @since 1.0.0
 */
class PlgSystemHelixultimate extends CMSPlugin
{
	/**
	 * Is autoload language.
	 *
	 * @var		boolean		$autoloadLanguage
	 * @since	1.0.0
	 */
	protected $autoloadLanguage = true;

	/**
	 * Joomla! app instance.
	 *
	 * @var		CMSApplication		$app	The CMS application instance.
	 * @since	1.0.0
	 */
	protected $app;

	/**
	 * The application initialization event.
	 *
	 * @return 	void
	 * @since 	4.0.7
	 */
	public function onAfterInitialise()
	{
		if (JVERSION < 4) {
			$this->registerBootstrap();
		}
	}

	/**
	 * Register the missing bootstrap methods tooltip and popover.
	 *
	 * @return void
	 * @since 2.0.6
	 */
	private function registerBootstrap()
	{
		$bootstrapPath = JPATH_ROOT . '/plugins/system/helixultimate/html/layouts/libraries/cms/html/bootstrap.php';

		if ($this->app->isClient('site') && \file_exists($bootstrapPath))
		{
			if (!class_exists('HelixBootstrap'))
			{
				require_once $bootstrapPath;
			}

			HTMLHelper::register('bootstrap.tooltip', ['HelixBootstrap', 'tooltip']);
			HTMLHelper::register('bootstrap.popover', ['HelixBootstrap', 'popover']);
		}
	}


	/**
	 * The form event. Load additional parameters when available into the field form.
	 * Only when the type of the form is of interest.
	 *
	 * @param	Form		$form	The form.
	 * @param	stdClass	$data	The data.
	 *
	 * @return	void
	 * @since	1.0.0
	 */

	public function onContentPrepareForm(Form $form, $data)
	{
	    $doc = Factory::getDocument();

    	$plgPath = Uri::root(true) . '/plugins/system/helixultimate';

    	Form::addFormPath(JPATH_PLUGINS . '/system/helixultimate/params');

    	$template = Factory::getApplication()->getTemplate(true);
    	$tmplUrl  = Uri::root(true) . '/templates/' . $template->template;      
    	$tmplPath = JPATH_ROOT . '/templates/' . $template->template;       

    	// Add Font Awesome from template or plugin
    	if (is_file($tmplPath . '/css/font-awesome.min.css')) {
    	    $doc->addStyleSheet($tmplUrl . '/css/font-awesome.min.css', ['version' => 'auto', 'relative' => false]);
    	} elseif (is_file(JPATH_PLUGINS . '/system/helixultimate/assets/css/font-awesome.min.css')) {
    	    $doc->addStyleSheet($plgPath . '/assets/css/font-awesome.min.css', ['version' => 'auto', 'relative' => false]);
    	}

    	// For menu item form
    	if ($form->getName() === 'com_menus.item') {
    	    HTMLHelper::_('jquery.framework');
    	    $doc->addScript($plgPath . '/assets/js/admin/jquery-ui.min.js', ['relative' => false, 'version' => 'auto']);
    	    $doc->addStyleSheet($plgPath . '/assets/css/admin/modal.css', ['relative' => false, 'version' => 'auto']);
    	    $doc->addScript($plgPath . '/assets/js/admin/modal.js', ['relative' => false, 'version' => 'auto']);
    	    $form->loadFile('megamenu', false);
    	}

    	// For article form
    	if ($form->getName() === 'com_content.article') {
    	    HTMLHelper::_('jquery.framework');
    	    HTMLHelper::_('jquery.token');
    	    $doc->addStyleSheet($plgPath . '/assets/css/admin/blog-options.css', ['relative' => false, 'version' => 'auto']);
    	    $doc->addScript($plgPath . '/assets/js/admin/blog-options.js', ['relative' => false, 'version' => 'auto']);

		    if (is_file($tmplPath . '/blog-options.xml')) {
		        Form::addFormPath($tmplPath);
		    }
		    $form->loadFile('blog-options', false);
		}
	}
		
	/**
	 * The content before save event.
	 *
	 * @param	string	$typeAlias	Form type alias.
	 * @param	Table	$table		Table object.
	 * @param	bool	$isNew		True if new.
	 * @param	array	$data		Data array.
	 *
	 * @return	bool
	 * @since	2.2.2
	 */
	public function onContentBeforeSave(string $typeAlias, $table, bool $isNew, $data = [])
	{
	    //Only handle com_content form type
	    if ($typeAlias !== 'com_content.form') {
	        return true;
	    }
	
	    // Only update existing articles 
	    if ($isNew || empty($table->id)) {
	        return true;
	    }
	
	    // Only when saving from the frontend
	    $app = Factory::getApplication();
	    if (!$app->isClient('site')) {
	        return true;
	    }
	
	    $old = Table::getInstance('content');
	    $old->load($table->id);
	
	    $oldAttribs = json_decode($old->attribs ?: '{}', true);
	    if (!is_array($oldAttribs)) {
	        $oldAttribs = [];
	    }
	
	    // Decode new attribs coming from the frontend form
	    $newAttribs = json_decode($table->attribs ?: '{}', true);
	    if (!is_array($newAttribs)) {
	        $newAttribs = [];
	    }
	
	    $merged = $oldAttribs;
	    foreach ($newAttribs as $key => $value) {
	        $merged[$key] = $value;
	    }

	    $table->attribs = json_encode($merged);
	
	    return true;
	}

	/**
	 * On Saving extensions logging method
	 * Method is called when an extension is being saved
	 * @param   BeforeSaveEvent  $event  Event instance.
	 *
	 * @throws \Exception
	 * @since	2.2.2
	 */
	public function onExtensionBeforeSave(\Joomla\CMS\Event\Model\BeforeSaveEvent $event)
	{
		$context = $event->getArgument('context');
        $table   = $event->getArgument('subject');
		$isNew = $event->getArgument('isNew');

		// Only handle template styles
		if ($context !== 'com_templates.style')
		{
			return true;
		}

		// Check if this template uses Helix Ultimate framework
		if (!$this->isHelixTemplate($table->template))
		{
			return true;
		}

		$data = new Registry($table->params);

		if (!empty($table->id))
		{
			$params = $this->getTemplateStyleParams($table->id);
			$table->params = $params;
			return true;
		}

		if ($isNew)
		{
			$app = Factory::getApplication();
			$id = $app->input->get('id', 0);
			if (!$id)
			{
				return true;
			}
			$params = $this->getTemplateStyleParams($id);
			$table->params = $params;
		}
	}

	/**
	 * Check if template uses the Helix Ultimate framework
	 *
	 * @param   string  $templateName  The template name
	 *
	 * @return  bool  True if the template uses Helix Ultimate, false otherwise
	 * @since   2.2.2
	 */
	private function isHelixTemplate($templateName)
	{
		if (empty($templateName))
		{
			return false;
		}

		$templatePath = JPATH_SITE . '/templates/' . $templateName;

		// Check if the template has an options.json file (Helix Ultimate indicator)
		if (file_exists($templatePath . '/options.json'))
		{
			return true;
		}

		// Check if the template's index.php includes the Helix Ultimate bootstrap
		$indexPath = $templatePath . '/index.php';
		if (file_exists($indexPath))
		{
			$content = @file_get_contents($indexPath);
			if ($content !== false && strpos($content, 'helixultimate/bootstrap.php') !== false)
			{
				return true;
			}
		}

		return false;
	}


	/**
	 * On Saving extensions logging method
	 * Method is called when an extension is being saved
	 *
	 * @param   string   $context  The extension
	 * @param   JTable   $table    DataBase Table object
	 * @param   boolean  $isNew    If the extension is new or not
	 *
	 * @return	void
	 * @since	1.0.0
	 */
	public function onExtensionAfterSave($context, $table, $isNew)
	{
		if ($context === 'com_templates.style' && !empty($table->id))
		{
			$params = new Registry;
			$params->loadString($table->params);

			$email       = $params->get('joomshaper_email');
			$license_key = $params->get('joomshaper_license_key');
			$template    = trim($table->template);

			if (!empty($email) && !empty($license_key))
			{
				$extra_query = 'joomshaper_email=' . urlencode($email);
				$extra_query .= '&amp;joomshaper_license_key=' . urlencode($license_key);

				$db = Factory::getContainer()->get(DatabaseInterface::class);
				$fields = array(
					$db->quoteName('extra_query') . ' = ' . $db->quote($extra_query),
					$db->quoteName('last_check_timestamp') . ' = 0'
				);

				$query = $db->getQuery(true)
					->update($db->quoteName('#__update_sites'))
					->set($fields)
					->where($db->quoteName('name') . ' = ' . $db->quote($template));
				$db->setQuery($query);
				$db->execute();
			}
		}
	}

	/**
	 * Get the template style params
	 *
	 * @param   int  $id  The template style id
	 *
	 * @return  string  The template style params
	 * @since   2.2.2
	 */
	public function getTemplateStyleParams($id)
	{
		$db = Factory::getContainer()->get(DatabaseInterface::class);
		$query = $db->getQuery(true);
		$query->select($db->quoteName('params'))
			->from($db->quoteName('#__template_styles'))
			//->where($db->quoteName('client_id') . ' = 0')
			->where($db->quoteName('id') . ' = ' . $db->quote($id));

		$db->setQuery($query);
		$tparams = $db->loadResult();

		return $tparams;
	}

	/**
	 * Attach the joomla web asset JSON file to the registry.
	 * From Joomla!4, the new web asset manager comes into the account.
	 * The templates might contains a joomla.asset.json file for managing
	 * the web assets.
	 *
	 * @return 	void
	 * @since 	2.0.5
	 */
	private function attachWebAsset()
	{
		$activeMenu = $this->app->getMenu()->getActive();
		$template = !empty($activeMenu) && $activeMenu->template_style_id > 0
			? Helper::getTemplateStyle($activeMenu->template_style_id)
			: Helper::loadTemplateData();

		$webAssetUri = '/templates/' . $template->template . '/joomla.asset.json';

		if(JVERSION >= 4 && \file_exists(JPATH_ROOT . $webAssetUri))
		{
			Factory::getDocument()->getWebAssetManager()->getRegistry()->addRegistryFile($webAssetUri);
		}
	}

	/**
	 * After route.
	 *
	 * @return  void
	 *
	 * @since   1.0.0
	 */
	public function onAfterRoute()
	{
		$option     = $this->app->input->get('option', '', 'STRING');
		$helix      = $this->app->input->get('helix', '', 'STRING');
		$view       = $this->app->input->get('view', '', 'STRING');
		$task       = $this->app->input->get('task', '', 'STRING');
		$request    = $this->app->input->get('request', '', 'STRING');
		$action     = $this->app->input->get('action', '', 'STRING');
		$id         = $this->app->input->get('id', 0, 'INT');
		$tmpl		= $this->app->input->get('tmpl', '', 'STRING');
		$helixReturn= $this->app->input->get('helixreturn', '', 'STRING');

		$this->attachWebAsset();

		$this->app->input->set('helix_id', 9);

		if ($this->app->isClient('administrator') && $option === 'com_ajax' && $helix === 'ultimate' && !empty($id))
		{
			$this->app->input->set('tmpl', 'component');

			if ($this->app->input->get('format', '', 'STRING') !== 'html')
			{
				$this->app->input->set('format', 'html');
			}
		}

		if ($this->app->isClient('administrator') && $option === 'com_ajax'
			&& $helix === 'ultimate' && !Factory::getApplication()->getIdentity()->id)
		{
			// Redirect to the login page
			$return = urlencode(base64_encode('index.php?option=com_ajax&helix=ultimate&id=' . $id));
			$this->app->redirect(Route::_('index.php?helixreturn=' . $return, false));
		}

		/** If `helixreturn` query exists in the url then redirect to the return url. */
		if (Factory::getApplication()->getIdentity()->id && !empty($helixReturn))
		{
			$this->app->redirect(base64_decode($helixReturn));
		}

		if ($this->app->isClient('administrator'))
		{
			if ($option === 'com_ajax' && $helix === 'ultimate')
			{
				Helper::flushSettingsDataToJs();

				if ($task === 'export' && !empty($id))
				{
					$template = $this->getTemplateName($id);

					header('Content-Description: File Transfer');
					header('Content-type: application/txt');
					header('Content-Disposition: attachment; filename="' . $template->template . '_settings_' . date('d-m-Y') . '.json"');
					header('Content-Transfer-Encoding: binary');
					header('Expires: 0');
					header('Cache-Control: must-revalidate');
					header('Pragma: public');
					echo $template->params;
					exit();
				}

				/**
				 * Trigger the onAfterRespond event in every ajax route hit.
				 */
				if (!empty($request))
				{
					if (JoomlaBridge::getVersion('major') > 4) {
						$this->app->getDispatcher()->dispatch('onAfterRespond');
					} else {
						$this->app->triggerEvent('onAfterRespond');
					}
				}
			}
		}

		if ($this->app->isClient('site'))
		{
			$option     = $this->app->input->get('option', '', 'STRING');
			$helix      = $this->app->input->get('helix', '', 'STRING');
			$request    = $this->app->input->get('request', '', 'STRING');
			$action     = $this->app->input->get('action', '', 'STRING');

			if ($option === 'com_ajax' && $helix === 'ultimate' && $request === 'task' && $action !== '')
			{
				switch ($action)
				{
					case 'upload-blog-image':
						Blog::upload_image();
						break;
					case 'remove-blog-image':
						Blog::remove_image();
						break;
					case 'view-media':
						Media::getFolders();
						break;
					case 'delete-media':
						Media::deleteMedia();
						break;
					case 'upload-media':
						Media::uploadMedia();
						break;
				}
			}
		}
	}

	/**
	 * Event on after respond.
	 * On this event initialize the platform.
	 *
	 * @return	void
	 * @since 	1.0.0
	 */
	public function onAfterRespond()
	{
		$request = $this->app->input->get('request', '', 'STRING');

		if ($this->app->isClient('administrator') && !empty($request))
		{
			/**
			 * On every ajax request handle the request from here.
			 */
			(new Platform)->handleRequests();
		}
	}

	/**
	 * Method to catch the onAfterDispatch event.
	 * This event is responsible for rendering the framework settings.
	 *
	 * @return	void
	 * @since	1.0.0
	 */
	public function onAfterDispatch()
	{
		$this->registerBootstrap();

		$option     = $this->app->input->get('option', '', 'STRING');
		$helix      = $this->app->input->get('helix', '', 'STRING');
		$view       = $this->app->input->get('view', '', 'STRING');
		$task       = $this->app->input->get('task', '', 'STRING');
		$request    = $this->app->input->get('request', '', 'STRING');
		$action     = $this->app->input->get('action', '', 'STRING');
		$id         = $this->app->input->get('id', 0, 'INT');

		if ($this->app->isClient('administrator')
			&& $option === 'com_ajax'
			&& $helix === 'ultimate'
			&& !empty($id)
			&& empty($request))
		{
			Platform::loadFrameworkSystem();
		}
	}

	public function onBeforeCompileHead()
	{
		$template = Helper::loadTemplateData();
		$params = $template->params;

		if ($this->app->isClient('administrator') && $this->app->input->get('option') === 'com_ajax' && $this->app->input->get('helix') === 'ultimate')
		{
			// Generating method `sanitizeAssetsForJ3` or `sanitizeAssetsForJ4` according to the Joomla major version.
			$sanitizeMethod = 'sanitizeAssetsForJ' . JoomlaBridge::getVersion('major');
			$this->$sanitizeMethod();
		}

		if ($this->app->isClient('site'))
		{
			$theme = new HelixUltimate;

			if ($params->get('compress_css'))
			{
				$theme->compress_css($params->get('exclude_css'));
			}

			if ($params->get('compress_js'))
			{
				$theme->compress_js($params->get('exclude_js'));
			}

			if ($params->get('image_lazy_loading', 0))
			{
				$theme->add_js('lazysizes.min.js');
			}

			/**
			 * Adding custom directory for the assets.
			 * If anyone put any file inside the `templates/{template}/css/custom`
			 * or `templates/{template}/js/custom` directory then the files
			 * would be added to the site.
			 */
			$theme->addCustomCSS();
			$theme->addCustomSCSS();
			$theme->addCustomJS();
		}
	}

	/**
	 * Sanitize the assets i.e. scripts and stylesheets before adding to the head.
	 * This function is applicable for Joomla 3.
	 * @note This method is using dynamically.
	 *
	 * @return 	void
	 * @since	2.0.0
	 */
	private function sanitizeAssetsForJ3()
	{
		$headData = Factory::getDocument()->getHeadData();
		$styles = $headData['styleSheets'];
		$scripts = $headData['scripts'];

		if (!empty($styles))
		{
			foreach ($styles as $url => $style)
			{
				$paths = explode('/', $url);

				if ($paths[count($paths) - 1] === 'template.css')
				{
					unset($styles[$url]);
				}
			}
		}

		if (!empty($scripts))
		{
			foreach ($scripts as $url => $script)
			{
				$paths = explode('/', $url);

				if ($paths[count($paths) - 1] === 'template.js')
				{
					unset($scripts[$url]);
				}
			}
		}

		$headData['styleSheets'] = $styles;
		$headData['scripts'] = $scripts;

		Factory::getDocument()->setHeadData($headData);
	}

	/**
	 * Sanitize the assets i.e. scripts and stylesheets before adding to the head.
	 * This function is applicable for Joomla 4.
	 * @note This method is using dynamically.
	 *
	 * @return	void
	 * @since	2.0.0
	 */
	private function sanitizeAssetsForJ4()
	{
		$doc = Factory::getDocument();
		$wa = $doc->getWebAssetManager();

		/**
		 * Disable the atum specific styles and scripts.
		 */
		$assets = [
			'style' => ['template.atum.base', 'template.atum', 'template.active', 'template.active.language', 'template.user', 'template.atum.ltr', 'template.atum.rtl'],
			'script' => ['choicesjs', 'dragula']
		];

		foreach ($assets as $type => $names)
		{
			foreach ($names as $name)
			{
				if ($wa->assetExists($type, $name))
				{
					$methodName = 'disable' . ucfirst($type);
					$wa->$methodName($name);
				}
			}
		}
	}

	/**
	 * Sanitize the assets i.e. scripts and stylesheets before adding to the head.
	 * This function is applicable for Joomla 4.
	 * @note This method is using dynamically.
	 *
	 * @return	void
	 * @since	2.0.17
	 */
	private function sanitizeAssetsForJ5()
	{
		$doc = Factory::getDocument();
		$wa = $doc->getWebAssetManager();

		/**
		 * Disable the atum specific styles and scripts.
		 */
		$assets = [
			'style' => ['template.atum.base', 'template.atum', 'template.active', 'template.active.language', 'template.user', 'template.atum.ltr', 'template.atum.rtl'],
			'script' => ['choicesjs', 'dragula']
		];

		foreach ($assets as $type => $names)
		{
			foreach ($names as $name)
			{
				if ($wa->assetExists($type, $name))
				{
					$methodName = 'disable' . ucfirst($type);
					$wa->$methodName($name);
				}
			}
		}
	}


	/**
	 * Sanitize the assets i.e. scripts and stylesheets before adding to the head.
	 * This function is applicable for Joomla 4.
	 * @note This method is using dynamically.
	 *
	 * @return	void
	 * @since	2.2.0
	 */
	private function sanitizeAssetsForJ6()
	{
		$doc = Factory::getDocument();
		$wa = $doc->getWebAssetManager();

		/**
		 * Disable the atum specific styles and scripts.
		 */
		$assets = [
			'style' => ['template.atum.base', 'template.atum', 'template.active', 'template.active.language', 'template.user', 'template.atum.ltr', 'template.atum.rtl'],
			'script' => ['choicesjs', 'dragula']
		];

		if (JVERSION >= 6) {
			$doc->addScript(Uri::root(true) . '/plugins/system/helixultimate/assets/js/chosen.jquery.js');
			$doc->addStyleSheet(Uri::root(true) . '/plugins/system/helixultimate/assets/css/chosen.css');
		}

		foreach ($assets as $type => $names)
		{
			foreach ($names as $name)
			{
				if ($wa->assetExists($type, $name))
				{
					$methodName = 'disable' . ucfirst($type);
					$wa->$methodName($name);
				}
			}
		}
	}

	public function onBeforeRender()
	{
		$option     = $this->app->input->get('option', '', 'STRING');
		$helix      = $this->app->input->get('helix', '', 'STRING');
		$id         = $this->app->input->get('id', 0, 'INT');

		if ($option === 'com_ajax' && $helix === 'ultimate' && $id)
		{
			if ($this->app->isClient('site'))
			{
				$template = Helper::loadTemplateData();
				$this->app->setTemplate($template->template, $template->params);
			}
		}
	}

	public function onAfterRender()
	{
		$template = Helper::loadTemplateData();
		$params = $template->params;
		$excludeComponents = ['com_spsimpleportfolio'];
		$option = $this->app->input->getCmd('option', '');

		if ($this->app->isClient('site') && $params->get('image_lazy_loading', 0))
		{
			
			if(\in_array($option, $excludeComponents)) {
				return;
			}
				
			// Check for Page Builder lazy load, if finds it will skip Helix lazy load
			$pagebuilder = false;
			$sp_pb_lazyload = 0;

			if ($option === 'com_sppagebuilder')
			{
				$pagebuilder = true;
			}

			if ($pagebuilder)
			{
				$config = ComponentHelper::getParams('com_sppagebuilder');
				$sp_pb_lazyload = $config->get('lazyloadimg', '0');
			}

			if ($sp_pb_lazyload != 0) {
				return;
			}

			$srcRegex = "@<img[^>]*src=[\"\']([^\"\']*)[\"\'][^>]*>@";
			$classRegex = "@<img[^>]*class=[\"\']([^\"\']*)[\"\'][^>]*>@";

			$body = $content = $this->app->getBody();
			$find = [];

			/** Get all the images tags. */
			preg_match_all($srcRegex, $body, $matches);

			if (!empty($matches))
			{
				/**
				 * Update the relative path (starts with (/)images/../)
				 * by absolute path i.e. path `images/headers/raindrops.jpg`
				 * with `/path/to/the/project/images/headers/raindrops.jpg`
				 */
				foreach ($matches[1] as $key => $match)
				{
					$find[] = $matches[0][$key];

					/** Cleanup the image src. */
					$_match = JVERSION >= 4
						? MediaHelper::getCleanMediaFieldValue($match)
						: $match;
					
					if (preg_match("@(^images\/|^\/+images\/).*$@", $match))
					{
						$update = Uri::base() . $_match;
						$regex = "@" . \preg_quote($match, '/') . "@";
						$matches[0][$key] = preg_replace($regex, $update, $matches[0][$key]);
					}
					else
					{
						if ($match !== $_match)
						{
							$regex = "@" . \preg_quote($match, '/') . "@";
							$matches[0][$key] = preg_replace($regex, $_match, $matches[0][$key]);
						}
					}
				}

				/** Loop through the full matches. */
				foreach ($matches[0] as $key => $match)
				{
					$imageElement = $match;

					/**
					 * If there has a src attributes
					 * then replace them with data-src.
					 */
					if (preg_match("@src=[\"\']([^\"\']*)[\"\']@", $imageElement))
					{
						$imageElement = preg_replace("@src(?=\=[\"\']([^\"\']*)[\"\'])@", "data-src", $imageElement);
					}

					/**
					 * If srcset exists in the img element then
					 * replace the srcset with the data-srcset and add a new
					 * data-size='auto' attribute value for maintaining size
					 */
					if (preg_match("@srcset=[\"\']([^\"\']*)[\"\']@", $imageElement))
					{
						$imageElement = preg_replace("@srcset(?=\=[\"\']([^\"\']*)[\"\'])@", "data-srcset", $imageElement);
						$dataSize = 'data-size="auto" />';
						$imageElement = preg_replace("@(<img[^>]*?)(\/?>)@", "$1 " . $dataSize, $imageElement);
					}

					/** Check if there is any class attribute at the image element. */
					if (preg_match($classRegex, $imageElement, $classMatches))
					{
						/**
						 * If there is a class attribute then take the class
						 * names and append a class 'lazyload' with the existing
						 * classes and replace the previous class attribute with
						 * updating one.
						 */
						if (!empty($classMatches))
						{
							$sp_pb_lazy_found = false;
							// Test if string contains 'sppb-element-lazy'
							if(strpos($classMatches[1], 'sppb-element-lazy') !== false)
							{
								$sp_pb_lazy_found = true;
							} else
							{
								$sp_pb_lazy_found = false;
							}
							if($sp_pb_lazy_found)
							{
								$newClass = 'class="' . $classMatches[1] . '"';
								$imageElement = preg_replace("@class=[\"\']([^\"\']*)[\"\']@", $newClass, $imageElement);
							} else 
							{
								$newClass = 'class="' . $classMatches[1] . ' lazyload"';
								$imageElement = preg_replace("@class=[\"\']([^\"\']*)[\"\']@", $newClass, $imageElement);
							}
						}
					}
					else
					{
						/** If no class attribute exists then add a class attribute. */
						$newClass = 'class="lazyload" />';
						$imageElement = preg_replace("@(<img[^>]*?)(\/?>)@", "$1 " . $newClass, $imageElement);
					}

					/** Update the content with updated images. */
					$content = str_replace($find[$key], $imageElement, $content);
				}
			}

			/**
			 * Set the body content with updated images
			 */
			$this->app->setBody($content);
		}
	}

	/**
	 * Get template object by it's ID.
	 *
	 * @param	int		$id		The template ID.
	 *
	 * @return	object			Template object.
	 * @since	1.0.0
	 */
	private function getTemplateName($id = 0)
	{
		$db = Factory::getDbo();
		$query = $db->getQuery(true);
		$query->select('*');
		$query->from($db->quoteName('#__template_styles'));
		$query->where($db->quoteName('client_id') . ' = 0');

		if (empty($id))
		{
			$query->where($db->quoteName('home') . ' = ' . $db->quote('1', false));
		}
		else
		{
			$query->where($db->quoteName('id') . ' = ' . (int) $id);
		}

		$db->setQuery($query);

		return $db->loadObject();
	}

	public function onAjaxHelixultimate()
	{
		$app 		= Factory::getApplication();
		$input 		= $app->input;

		$task = $input->get('task', '', 'STRING');

		// If no task provided to the request then it close with a 403 bad request error.
		if (empty($task))
		{
			$app->setHeader('status', 403, true);
			$app->sendHeaders();
			echo new JsonResponse('You missed to pass task at your requested URL.');
			$app->close();
		}

		// Destructing the Class and method from the task
		$namespace = "HelixUltimate\\Framework\\HttpResponse\\";
		$class = "Response";
		$method = '';

		$classMethod = explode('.', $task);

		if (count($classMethod) === 1)
		{
			$method = $classMethod[0];
		}
		elseif (count($classMethod) === 2)
		{
			$class = ucfirst($classMethod[0]);
			$method = $classMethod[1];
		}
		else
		{
			$app->setHeader('status', 500, true);
			$app->sendHeaders();
			echo new JsonResponse('task is not in a proper format. Use "className.method" or only "method" format without quote.');
			$app->close();
		}

		$class = $namespace . $class;

		// Check if the class is exists or not
		if (!\class_exists($class))
		{
			$app->setHeader('status', 500, true);
			$app->sendHeaders();
			echo new JsonResponse('The class "' . $class . '" does not exist!');
			$app->close();
		}

		// Check if the method exists
		if (!\method_exists($class, $method))
		{
			$app->setHeader('status', 500, true);
			$app->sendHeaders();
			echo new JsonResponse('Method "' . $method . '" inside the class "' . $class . '" does not exist!');
			$app->close();
		}

		// $instance = new $class();
		$response = $class::$method();

		$app->setHeader('status', 200, true);
		$app->sendHeaders();
		echo new JsonResponse($response);
		$app->close();
	}
}
