gistfile1.txt

<?php
/*
Plugin name: Batcache Manager
Plugin URI: http://wordpress.org/extend/plugins/batcache/
Description: This optional plugin improves Batcache.
Author: Andy Skelton
Author URI: http://andyskelton.com/
Version: 1.3
*/
global $batcache, $wp_object_cache;
// Do not load if our advanced-cache.php isn't loaded
if ( ! isset( $batcache ) || ! is_object( $batcache ) || ! method_exists( $wp_object_cache, 'incr' ) ) {
        return;
}

$batcache->configure_groups();

/**
 * @param $post_id
 */
function batcache_post( $post_id ) {
        global $batcache;

        $post = get_post( $post_id );
        if ( $post->post_type == 'revision' || ! in_array( get_post_status( $post_id ), array( 'publish', 'trash' ) ) ) {
                return;
        }

        $links   = array();
        $links[] = home_url();
        $links[] = get_permalink( $post_id );
        $links[] = get_post_comments_feed_link( $post_id );
        $links[] = get_feed_link( 'rdf' );
        $links[] = get_feed_link( 'rss' );
        $links[] = get_feed_link( 'rss2' );
        $links[] = get_feed_link( 'atom' );
        if ( $post->post_type == 'post' ) {
                $links[] = get_author_posts_url( $post->post_author );
                $links[] = get_author_feed_link( $post->post_author );
                $year    = get_the_time( "Y", $post );
                $month   = get_the_time( "m", $post );
                $day     = get_the_time( "d", $post );
                $links[] = get_year_link( $year );
                $links[] = get_month_link( $year, $month );
                $links[] = get_day_link( $year, $month, $day );
        } else if ( ! in_array( $post->post_type, get_post_types( array( 'public' => true ) ) ) ) {
                if ( $archive_link = get_post_type_archive_link( $post->post_type ) ) {
                        $links[] = $archive_link;
                }
        }
        batcache_clear_urls( $links );
}
// Regen home and permalink on posts and pages
add_action( 'clean_post_cache', 'batcache_post' );

// Regen permalink on comments (TODO)
//add_action('comment_post',          'batcache_comment');
//add_action('wp_set_comment_status', 'batcache_comment');
//add_action('edit_comment',          'batcache_comment');

/**
 * @param $ids
 * @param $taxonomy
 */
function batcache_term( $ids, $taxonomy ) {
        $links = array();
        foreach ( $ids as $term ) {
                $term_link = get_term_link( $term, $taxonomy );
                if ( ! is_wp_error( $term_link ) ) {
                        $links[] = $term_link;
                }
                $term_link_feed = get_term_feed_link( $term, $taxonomy );
                if ( $term_link_feed ) {
                        $links[] = $term_link_feed;
                }
        }
        batcache_clear_urls( $links );
}

add_action( 'clean_term_cache', 'batcache_term', 10, 2 );


function batcache_clear_urls( $links ) {
        $home         = parse_url( home_url(), PHP_URL_HOST );
        $compare_urls = array(
                parse_url( get_option( 'home' ), PHP_URL_HOST ),
                parse_url( get_option( 'siteurl' ), PHP_URL_HOST ),
                parse_url( site_url(), PHP_URL_HOST )
        );

        foreach ( $compare_urls as $compare_url ) {
                if ( $compare_url != $home ) {
                        foreach ( $links as $url ) {
                                $links[] = str_replace( $home, $compare_url, $url );
                        }
                }
        }

        foreach ( $links as $url ) {
                batcache_clear_url( $url );
        }
}

/**
 * @param $url
 *
 * @return bool|false|int
 */
function batcache_clear_url( $url ) {
        global $batcache, $wp_object_cache;

        if ( empty( $url ) ) {
                return false;
        }
        $url = set_url_scheme( $url, 'http' );

        $url_key = md5( $url );
        wp_cache_add( "{$url_key}_version", 0, $batcache->group );
        $retval = wp_cache_incr( "{$url_key}_version", 1, $batcache->group );

        $batcache_no_remote_group_key = array_search( $batcache->group, (array) $wp_object_cache->no_remote_groups );
        if ( false !== $batcache_no_remote_group_key ) {
                // The *_version key needs to be replicated remotely, otherwise invalidation won't work.
                // The race condition here should be acceptable.
                unset( $wp_object_cache->no_remote_groups[ $batcache_no_remote_group_key ] );
                $retval                                                             = wp_cache_set( "{$url_key}_version", $retval, $batcache->group );
                $wp_object_cache->no_remote_groups[ $batcache_no_remote_group_key ] = $batcache->group;
        }

        return $retval;
}