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<?php
/**
* @package Astroid Framework
* @author Astroid Framework Team https://astroidframe.work
* @copyright Copyright (C) 2023 AstroidFrame.work.
* @license https://www.gnu.org/licenses/gpl-2.0.html GNU/GPLv2 or Later
*/
namespace Astroid\Component;
use Astroid\Framework;
use Astroid\Helper;
use Joomla\CMS\Uri\Uri;
use Joomla\CMS\Factory;
defined('_JEXEC') or die;
class LazyLoad
{
public static function run()
{
Framework::getDebugger()->log('Lazy Load');
$app = Factory::getApplication();
$template = Framework::getTemplate();
$document = Framework::getDocument();
$wa = $app->getDocument()->getWebAssetManager();
$params = $template->getParams();
$run = $params->get('lazyload', 0);
// Stop Lazy Load for RSSFeeds
if ($document->getType() == 'feed') $run = false;
// Stop Lazy Load
if (!$run) return;
Helper::createDir(ASTROID_CACHE . '/lazy-load/' . $template->id);
// $document->addScript('vendor/astroid/js/lazyload.min.js');
$wa->registerAndUseScript('astroid.lazyload', 'astroid/lazyload.min.js', ['relative' => true, 'version' => 'auto'], [], ['jquery']);
if ($params->get('lazyload_components', '')) {
$run = self::selectedComponents($params->get('lazyload_components', ''), $params->get('lazyload_components_action', 'include'));
if (!$run) {
return;
}
}
if ($params->get('lazyload_urls', '')) {
$run = self::selectedURLs($params->get('lazyload_urls', ''), $params->get('lazyload_urls_action', 'include'));
if (!$run) {
return;
}
}
if ($params->get('lazyload_exclude_views', '')) {
$run = self::exclidedViews($params->get('lazyload_exclude_views', ''));
if (!$run) {
return;
}
}
$blankImage = Uri::root() . 'media/astroid/assets/images/blank.png';
$patternImage = "@<img[^>]*src=[\"\']([^\"\']*)[\"\'][^>]*>@";
$body = $inputString = $app->getBody(false);
preg_match_all($patternImage, $inputString, $matches);
if ($params->get('lazyload_imgs', '') && !empty($matches)) {
self::selectedImages($matches, $params->get('lazyload_imgs', ''), $params->get('lazyload_imgs_action', 'include'));
}
if ($params->get('lazyload_classes', '') && !empty($matches)) {
self::selectedClasses($matches, $params->get('lazyload_classes', ''), $params->get('lazyload_classes_action', 'include'));
}
if (!empty($matches[0])) {
$imageMapFile = ASTROID_CACHE . '/lazy-load/' . $template->id . '.json';
$imageMapChanged = false;
$imageMap = [];
if (file_exists($imageMapFile)) {
$imageMap = \json_decode(\file_get_contents($imageMapFile), true);
}
$base = Uri::base();
$basePath = Uri::base(true);
foreach ($matches[0] as $key => $match) {
if (strpos($matches[1][$key], 'http://') === false && strpos($matches[1][$key], 'https://') === false) {
if (!empty($basePath)) {
if (strpos($matches[1][$key], $basePath) === false) {
$match = str_replace($matches[1][$key], $basePath . '/' . $matches[1][$key], $match);
}
} else {
if (strpos($matches[1][$key], $base) === false) {
$match = str_replace($matches[1][$key], $base . $matches[1][$key], $match);
}
}
}
if (Framework::getDebugger()->debug) {
Framework::getReporter('Lazy Load Images')->add('<a href="' . $matches[1][$key] . '" target="_blank"><code>' . $document->beutifyURL($matches[1][$key]) . '</code></a>');
}
if (!isset($imageMap[md5($matches[1][$key])])) {
$base64thumbnail = self::getBase64Thumbnail($matches[1][$key]);
$imageMap[md5($matches[1][$key])] = $base64thumbnail;
$imageMapChanged = true;
}
$base64Image = $imageMap[md5($matches[1][$key])];
if ($base64Image !== false) {
$blankImage = $base64Image;
}
$matchLazy = str_replace('src=', 'src="' . $blankImage . '" data-astroid-lazyload=', $match);
$body = str_replace($matches[0][$key], $matchLazy, $body);
}
if ($imageMapChanged) {
file_put_contents($imageMapFile, \json_encode($imageMap));
}
$app->setBody($body);
Framework::getDebugger()->log('Lazy Load');
}
}
public static function getBase64Thumbnail($sourceImage)
{
if (!is_file($sourceImage)) return false;
error_reporting(E_ERROR | E_PARSE);
try {
$info = getimagesize($sourceImage);
if (!is_array($info) || !in_array($info['mime'], ['image/jpeg', 'image/gif', 'image/png'])) {
return false;
}
list($origWidth, $origHeight) = $info;
$image = imagecreatetruecolor($origWidth, $origHeight);
imagesavealpha($image, true);
$transparent = imagecolorallocatealpha($image, 255, 0, 0, 127);
imagefill($image, 0, 0, $transparent);
ob_start();
imagepng($image);
$blankImageBuffer = ob_get_clean();
if (ob_get_length() > 0) {
ob_end_clean();
}
$blankImage = 'data:image/png;base64,' . base64_encode($blankImageBuffer);
return $blankImage;
} catch (\Exception $e) {
return false;
}
}
public static function selectedImages(&$matches, $images = '', $toggle = '')
{
$images = array_map('trim', explode("\n", $images));
$matchesTemp = array();
$matches1Temp = array();
foreach ($images as $image) {
$count = 0;
foreach ($matches[1] as $match) {
if (preg_match('@' . preg_quote($image) . '@', $match)) {
if ($toggle == 'exclude') {
unset($matches[0][$count]);
unset($matches[1][$count]);
} else {
$matchesTemp[] = $matches[0][$count];
$matches1Temp[] = $matches[1][$count];
}
}
$count++;
}
}
if ($toggle == 'include') {
unset($matches[0]);
unset($matches[1]);
$matches[0] = $matchesTemp;
$matches[1] = $matches1Temp;
}
}
public static function selectedComponents($components = '', $toggle = '')
{
$option = Factory::getApplication()->input->getWord('option');
$components = array_map('trim', explode("\n", $components));
$hit = false;
$return = true;
foreach ($components as $component) {
if ($option === $component) {
$hit = true;
break;
}
}
if ($toggle == 'include') {
if ($hit === false) {
$return = false;
}
return $return;
}
if ($hit === true) {
$return = false;
}
return $return;
}
public static function selectedURLs($surls = '', $toggle = '')
{
$url = Uri::getInstance()->toString();
$surls = array_map('trim', explode("\n", $surls));
$hit = false;
$return = true;
foreach ($surls as $surl) {
if ($url === $surl) {
$hit = true;
break;
}
}
if ($toggle == 'include') {
if ($hit === false) {
$return = false;
}
return $return;
}
if ($hit === true) {
$return = false;
}
return $return;
}
public static function exclidedViews($views = '')
{
$view = Factory::getApplication()->input->getWord('tmpl', '');
$views = array_map('trim', explode(",", $views));
$return = true;
if (in_array($view, $views)) {
$return = false;
}
return $return;
}
public static function selectedClasses(&$matches, $classes = '', $toggle = '')
{
$classes = array_map('trim', explode("\n", $classes));
foreach ($matches[0] as $key => $match) {
$classExists = false;
foreach ($classes as $classname) {
$exists = preg_match('@class=[\"\'].*' . $classname . '.*[\"\']@Ui', $match);
if (!empty($exists)) {
$classExists = true;
break;
}
}
if ($toggle == 'include') {
if (!$classExists) {
unset($matches[0][$key]);
unset($matches[1][$key]);
}
continue;
}
if (!empty($classExists)) {
unset($matches[0][$key]);
unset($matches[1][$key]);
}
}
}
}