[Smush Pro] - Fix Images not render from CDN on Ajax, for theme Newspaper and plugin Revoslider

smush-fix-image-not-render-from-cdn.php

<?php
/**
 * Plugin Name: [Smush Pro] - Fix Images not render from CDN
 * Description: [Smush Pro] - Fix Images not render from CDN on Ajax, for theme Newspaper and plugin Revoslider - 1134740322826710/1138709545061167/1143766010143430
 * Version: 1.2
 * Author: Thobk @ WPMUDEV
 * Author URI: https://premium.wpmudev.org
 * License: GPLv2 or later
 */
if ( ! defined( 'ABSPATH' ) ) { exit; } elseif ( defined( 'WP_CLI' ) && WP_CLI ) { return; }

add_action( 'after_setup_theme', 'wpmudev_smpro_fix_image_not_render_from_cdn_func', 100 );

function wpmudev_smpro_fix_image_not_render_from_cdn_func() {
	if( defined('WP_SMUSH_VERSION') && ( class_exists( 'Smush\WP_Smush' ) || class_exists( 'WP_Smush' ) ) ){
		// return if disabled cdn
		if( ! Smush\Core\Settings::get_instance()->get('cdn') ) return;

		if( ! function_exists('wpmudev_check_front_end_ajax') ){
			function wpmudev_check_front_end_ajax(){
				if( ! ( is_admin() && wp_doing_ajax() ) ) return false;

				$script_filename = isset($_SERVER['SCRIPT_FILENAME']) ? $_SERVER['SCRIPT_FILENAME'] : '';

				//From wp-includes/functions.php, wp_get_referer() function.
				//Required to fix: https://core.trac.wordpress.org/ticket/25294
				$ref = '';
				if ( ! empty( $_REQUEST['_wp_http_referer'] ) ){
					$ref = wp_unslash( $_REQUEST['_wp_http_referer'] );
				}elseif ( ! empty( $_SERVER['HTTP_REFERER'] ) ){
					$ref = wp_unslash( $_SERVER['HTTP_REFERER'] );
				}

				//If referer does not contain admin URL and we are using the admin-ajax.php endpoint, this is likely a frontend AJAX request
				if( strpos($ref, admin_url()) === false && basename($script_filename) === 'admin-ajax.php' ){
					return true;
				}

				return false;
			}
		}

		class WPMUDEV_SMPro_Image_Not_Render_From_CDN{
			private $cdn_core;
			private $filtered;
			private static $_instance;
			public function __construct(){
				/**
				 * for module template Newspaper/includes/modules
				 * Theme: Newspaper
				 */
				if( defined('TD_THEME_NAME') && class_exists('td_config') ){
					add_filter( 'td_wp_booster_module_constructor', array( $this, 'add_hook_fix_image_not_render_from_cdn_on_tp_module_template' ) );

					// enabled render cdn on ajax
					if( wpmudev_check_front_end_ajax() ){
						$cdn = $this->cdn_core();
						if( ! has_filter( 'wp_calculate_image_srcset', array( $cdn, 'update_image_srcset' ) ) ){
							// Update responsive image srcset and sizes if required.
							add_filter( 'wp_calculate_image_srcset', array( $cdn, 'update_image_srcset' ), 99, 5 );
							add_filter( 'wp_calculate_image_sizes', array( $cdn, 'update_image_sizes' ), 10, 5 );

							// Add resizing arguments to image src.
							add_filter( 'smush_image_cdn_args', array( $cdn, 'update_cdn_image_src_args' ), 99, 3 );
						}
					}
				}

				/**
				 * nuclear_ape_gutenberg theme
				 */
				if( function_exists('nuclear_ape_gutenberg_setup') ){
					add_action( 'woocommerce_before_single_product', array( $this, 'enable_render_image_from_cdn') );
					add_action( 'woocommerce_after_single_product', array( $this, 'disable_render_image_from_cdn') );
				}
				/**
				 * Fix image from revoslider bg image type not render from cdn
				 * Plugin: Revoslider
				 */
				if( class_exists('RevSliderFront') ){
					add_filter( 'revslider_slide_initByData', array( $this, 'revslider_slide_initByData_add_hook_render_image_from_cdn' ) );
					add_action( 'revslider_enable_static_layers', array( $this, 'disable_render_image_from_cdn') );
				}

			}

			public static function get_instance(){
				if( is_null( self::$_instance ) ){
					self::$_instance = new self();
				}

				return self::$_instance;
			}

			public function enable_render_image_from_cdn(){
				if( ! $this->filtered ){
					add_filter( 'wp_get_attachment_image_src', array( $this, 'render_image_from_cdn') );
					$this->filtered = true;
				}
			}

			public function disable_render_image_from_cdn(){
				if( $this->filtered ){
					remove_filter( 'wp_get_attachment_image_src', array( $this, 'render_image_from_cdn') );
					$this->filtered = null;
				}
			}

			public function add_hook_fix_image_not_render_from_cdn_on_tp_module_template($obj){
				add_filter( 'wp_get_attachment_image_src', array( $this, 'render_image_from_cdn') );

				return $obj;
			}

			public function cdn_core(){
				if( is_null( $this->cdn_core ) ){
					if( class_exists('Smush\WP_Smush') ){
						$this->cdn_core = Smush\WP_Smush::get_instance()->core()->mod->cdn;
					}else{
						$this->cdn_core = WP_Smush::get_instance()->core()->mod->cdn;
					}
				}

				return $this->cdn_core;
			}


			public function render_image_from_cdn($image){
				if( ! empty( $image[0] ) ){
					$image[0] = $this->generate_cdn_url( $image[0] );
				}

				if( ! $this->filtered ){
					// remove the hook if is tp_module_template
					remove_filter( 'wp_get_attachment_image_src', array( $this, 'render_image_from_cdn') );
				}

				return $image;
			}

			public function generate_cdn_url($image_url){
				if( $this->is_supported_path( $image_url ) ){
					$image_url = $this->cdn_core()->generate_cdn_url( $image_url );
				}

				return $image_url;
			}

			// revoslider
			public function revslider_slide_initByData_add_hook_render_image_from_cdn( $record ){
				if( empty( $record['params']['background_type'] ) || 'image' === $record['params']['background_type'] ){
					add_filter( 'wp_get_attachment_image_src', array( $this, 'render_image_from_cdn') );	

					$this->filtered = true;
				}

				return $record;
			}

			// public function revslider_remove_hook_render_cdn_image_for_bg_type(){
			// 	if( $this->filtered ){
			// 		remove_filter( 'wp_get_attachment_image_src', array( $this, 'render_image_from_cdn') );
			// 		$this->filtered = null;
			// 	}
			// }




			/**
			 * Check if the image path is supported by the CDN.
			 *
			 * @since 3.0
			 *
			 * @param string $src  Image path.
			 *
			 * @return bool|string
			 */
			private function is_supported_path( $src ) {
				$url_parts = wp_parse_url( $src );

				// Unsupported scheme.
				if ( isset( $url_parts['scheme'] ) && 'http' !== $url_parts['scheme'] && 'https' !== $url_parts['scheme'] ) {
					return false;
				}

				if ( ! isset( $url_parts['scheme'] ) && 0 === strpos( $src, '//' ) ) {
					$src = is_ssl() ? 'https:' : 'http:' . $src;
				}

				// This is a relative path, try to get the URL.
				if ( ! isset( $url_parts['host'] ) && ! isset( $url_parts['scheme'] ) ) {
					$src = site_url( $src );
				}

				$mapped_domain = $this->check_mapped_domain();

				if ( false === strpos( $src, content_url() ) || ( is_multisite() && $mapped_domain && false === strpos( $src, $mapped_domain ) ) ) {
					return false;
				}

				// Allow only these extensions in CDN.
				$ext = strtolower( pathinfo( $src, PATHINFO_EXTENSION ) );
				if ( ! in_array( $ext, array( 'gif', 'jpg', 'jpeg', 'png' ), true ) ) {
					return false;
				}

				return $src;
			}


			/**
			 * Support for domain mapping plugin.
			 *
			 * @since 3.1.1
			 */
			private function check_mapped_domain() {
				if ( ! is_multisite() ) {
					return false;
				}

				if ( ! defined( 'DOMAINMAP_BASEFILE' ) ) {
					return false;
				}

				$domain = wp_cache_get( 'smush_mapped_site_domain', 'smush' );

				if ( ! $domain ) {
					global $wpdb;

					$domain = $wpdb->get_var(
						$wpdb->prepare(
							"SELECT domain FROM {$wpdb->base_prefix}domain_mapping WHERE blog_id = %d ORDER BY id ASC LIMIT 1",
							get_current_blog_id()
						)
					); // Db call ok.

					if ( null !== $domain ) {
						wp_cache_add( 'smush_mapped_site_domain', $domain, 'smush' );
					}
				}

				return $domain;
			}

		}

		$run = WPMUDEV_SMPro_Image_Not_Render_From_CDN::get_instance();
	}
}