[Smush Pro] - Support CDN For Images Relative Path

smush-support-cdn-for-relative-path.php

<?php
/**
 * Plugin Name: [Smush Pro] - Support CDN For Images Relative Path
 * Description: [Smush Pro] - Support CDN For Images Relative Path: /wp-content/uploads/...|/wp-content/themes/...
 * Task: 0/11289012348292/1168821112494197
 * 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_support_cdn_for_real_path_func', 100 );

function wpmudev_smpro_support_cdn_for_real_path_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;

		class WPMUDEV_SMPro_Support_CDN_For_Image_Real_Path{
			private $current_src;
			private $current_cdn_url;
			public function __construct(){
				add_filter( 'smush_skip_image_from_cdn', array( $this, 'maybe_custom_content_url' ), 99999, 2 );
				add_filter( 'smush_image_src_after_cdn', array( $this, 'save_cdn_url' ) );
				add_filter( 'smush_cdn_image_tag', array( $this, 'maybe_restore_content_url') );
			}

			public function maybe_custom_content_url( $skip, $src ){
				if( ! $skip && 0 === strpos( $src, '/wp-content/' ) ){
					$this->current_src = $src;
				}
				return $skip;
			}

			public function save_cdn_url( $src ){
				$this->current_cdn_url = $src;
				return $src;
			}

			public function maybe_restore_content_url( $image ){
				if( $this->current_src && $this->current_cdn_url && false === strpos( $image, $this->current_cdn_url ) ){
					$image = preg_replace( '#(src=["|\'])' . $this->current_src . '(["|\'])#i', '\1' . $this->current_cdn_url . '\2', $image, 1 );
				}
				return $image;
			}
		}

		$run = new WPMUDEV_SMPro_Support_CDN_For_Image_Real_Path;
	}
}