[WordPress][WP Rocket] Creates cached files based on dynamic cookies for AffiliateWP. (WP Rocket 2.7+ required.)

wp-rocket-affiliatewp-cookies-cache.php

<?php
/**
 * Plugin Name: WP Rocket | AffiliateWP Cookie Cache
 * Description: Creates a specific cache for each affiliate ref ID.
 * Author:      WP Rocket Support Team
 * Author URI:  http://wp-rocket.me/
 * Plugin URI:  https://gist.github.com/glueckpress/d379c5534708f440942523fe205ec840
 * License:     GNU General Public License v3 or later
 * License URI: http://www.gnu.org/licenses/gpl-3.0.html
 */

defined( 'ABSPATH' ) or die();

/**
 * Add Affiliate WP cookie ID to dynamic caches.
 * @param  array $cookies Array of cookie IDs used for dynamic caches
 * @return array         (Maybe) Extended array of cookie IDs
 */
function wp_rocket_affiliate_wp__dynamic_cookie( $cookies ) {

	$cookies[] = 'affwp_ref';

	return $cookies;
}
add_filter( 'rocket_cache_dynamic_cookies', 'wp_rocket_affiliate_wp__dynamic_cookie' );

/**
 * Updates .htaccess, and regenerates config file.
 *
 * @return bool
 */
function wp_rocket_affiliate_wp__housekeeping() {

	if ( ! function_exists( 'flush_rocket_htaccess' )
	  || ! function_exists( 'rocket_generate_config_file' ) ) {
		return false;
	}

	flush_rocket_htaccess();
	rocket_generate_config_file();

	return true;
}
register_activation_hook( __FILE__, 'wp_rocket_affiliate_wp__housekeeping' );

/**
 * Removes plugin additions, updates .htaccess, and regenerates config file.
 *
 * @return bool
 */
function wp_rocket_affiliate_wp__deactivate() {

	remove_filter( 'rocket_cache_dynamic_cookies', 'wp_rocket_affiliate_wp__dynamic_cookie' );

	wp_rocket_affiliate_wp__housekeeping();
}
register_deactivation_hook( __FILE__, 'wp_rocket_affiliate_wp__deactivate' );