<?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: 1.2
*/

// 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();

// 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');

function batcache_post($post_id) {
	global $batcache;

	$post = get_post($post_id);
	if ( $post->post_type == 'revision' || get_post_status($post_id) != 'publish' )
		return;

	batcache_clear_url( get_option('home') );
	batcache_clear_url( trailingslashit( get_option('home') ) );
	batcache_clear_url( get_permalink($post_id) );
}

function batcache_clear_url($url) {
	global $batcache;
	if ( empty($url) )
		return false;
	$url_key = md5($url);
	wp_cache_add("{$url_key}_version", 0, $batcache->group);
	return wp_cache_incr("{$url_key}_version", 1, $batcache->group);
}