[Hummingbird Pro] Clear homepage cache programmatically when a post is updated

hb-custom-home-cache-clear.php

<?php
/**
 * Plugin Name: [Hummingbird Pro] Clear homepage cache programmatically when a post is updated
 * Description: Useful when the "Clear full cache when post/page is updated" option needs to remain disabled 
 * Author: Anderson Salas @ WPMUDEV
 * Task: SLS-6215
 * Author URI: https://premium.wpmudev.org
 * License: GPLv2 or later
 */

add_action( 'plugins_loaded', function() {

    if ( ! defined( 'WPHB_VERSION' ) ) {
        return; // Hummingbird is not installed/enabled.
    }
    
    if ( class_exists( 'WPMUDEV_Hummingbrd_Custom_Cache_Clear' ) ) {
        return; // Already loaded.
    }

    class WPMUDEV_Hummingbrd_Custom_Cache_Clear {
        private static $instance;

        // [>>>] Snippet settings BEGIN ----------------------------------------- //

        // The ID(s) of the page(s) which cache will be cleared after a post edit.
        private $target_pages = [ 32 ];

        // [>>>] Snippet settings END ------------------------------------------- //

        private $cache;

        public static function get() {
            if ( null === self::$instance ) {
                self::$instance = new self();
            }
            return self::$instance;
        }

        private function __construct() {
            $cache = Hummingbird\WP_Hummingbird::get_instance()->core->modules[ 'page_cache' ] ?? null;

            if ( empty( $cache ) || false === $cache->is_active() ) {
                return; // Page Cache is not enabled.
            }

            $this->cache = $cache;

            add_action( 'edit_post', array( $this, 'post_edit' ), 1 );
            add_action( 'transition_post_status', array( $this, 'post_status_change' ), 11, 3 );
        }

        public function post_edit( $post_id ) {
            if ( wp_is_post_revision( $post_id ) ) {
                return;
            }

            $post = get_post( $post_id );

            if ( ! isset( $post->post_type ) || ! is_post_type_viewable( $post->post_type ) ) {
                return;
            }

            $this->purge_post_cache( $post_id );
        }

        public function post_status_change( $new_status, $old_status, $post ) {
            global $post_trashed;
    
            if ( ( ! isset( $post->post_type )  || ! is_post_type_viewable( $post->post_type ) ) ||
                 ( $new_status === $old_status  || wp_is_post_revision( $post->ID ) ) ||
                 ( 'auto-draft' === $new_status || 'draft' === $new_status  ) ) {
                return;
            }
        
            $post_trashed = false;

            if ( 'trash' === $new_status ) {
                $post_trashed = true;
            }
    
            if ( ( 'publish' === $new_status && 'publish' !== $old_status ) || 'trash' === $new_status ) {
                $this->purge_post_cache( $post->ID );
            }
        }

        private function purge_post_cache( $post_id ) {
            $post_ids = array_merge( [ $post_id ], $this->target_pages );

            $method = new ReflectionMethod( $this->cache, 'purge_post_cache' );
            $method->setAccessible( true );

            foreach( $post_ids as $id ) {
                $method->invoke( $this->cache, $id );
            }
        }
    }

    WPMUDEV_Hummingbrd_Custom_Cache_Clear::get();
});