Sync PMPro Addon Package Page Purchases with WP Courseware Courses

pmpro_addon_pages_for_courses.php

<?php
/*
Plugin Name: PMPro Addon Packages for WP Courseware
Plugin URI: http://www.paidmembershipspro.com/wp/pmpro-addon-packages-for-wp-courseware/
Description: Sync PMPro Addon Package Page Purchases with WP Courseware Courses
Version: .1
Author: Stranger Studios
Author URI: http://www.strangerstudios.com
*/

/*
	Define which pages give access to which courses.
	Format is {WP Post ID} => {Course ID}
	
	!! Uncomment and edit this array here or add this to a custom plugin. !!
*/
//global $pmpro_addon_pages_for_courses;
//$pmpro_addon_pages_for_courses = array(
//	3366 => 1
//);

/*
	If on a Course, Module, or Unit, make sure they have access.
*/
function pmproap_wpcw_template_redirect()
{
	global $post, $pmpro_addon_pages_for_courses;
		
	//make sure both pmpro and wp courseware are loaded
	if(!function_exists("pmpro_has_membership_access") || !function_exists("WPCW_plugin_hasAdminRights"))
		return;
	
	//lock down units
	if(!empty($post) && $post->post_type == "course_unit")
	{
		//what is the course for this unit
		require_once(dirname(__FILE__) . "/../wp-courseware/lib/class_courses_map.inc.php");
		
		$course = new WPCW_CourseMap();
		$course->loadDetails_byUnitID($post->ID);
		$details = $course->getCourseDetails();
		
		$courses2pages = array_flip($pmpro_addon_pages_for_courses);

		if(!empty($courses2pages[$details->course_id]))
		{
			//if the user doesn't have access to this page, redirect them there
			if(!pmpro_has_membership_access($courses2pages[$details->course_id]))
			{
				wp_redirect(get_permalink($courses2pages[$details->course_id]));
				exit;
			}
		}
	}
}
add_action('template_redirect', 'pmproap_wpcw_template_redirect');

/*
	When purchasing a page, give them access to the corresponding course.
*/
function wpcw_pmproap_action_add_to_package($user_id, $post_id)
{
	global $pmpro_addon_pages_for_courses;
	
	//make sure both pmpro and wp courseware are loaded
	if(!function_exists("pmpro_has_membership_access") || !function_exists("WPCW_plugin_hasAdminRights"))
		return;	
	
	//course for this page?
	if(!empty($pmpro_addon_pages_for_courses[$post_id]))
	{
		WPCW_courses_syncUserAccess($user_id, array($pmpro_addon_pages_for_courses[$post_id]));
	}
}
add_action('pmproap_action_add_to_package', 'wpcw_pmproap_action_add_to_package', 10, 2);

/*
	When losing access to a page, remove access to the corresponding course.
*/
function wpcw_pmproap_action_remove_from_package($user_id, $post_id)
{
	global $pmpro_addon_pages_for_courses;
	
	//make sure both pmpro and wp courseware are loaded
	if(!function_exists("pmpro_has_membership_access") || !function_exists("WPCW_plugin_hasAdminRights"))
		return;
	
	//course for this page?
	if(!empty($pmpro_addon_pages_for_courses[$post_id]))
	{
		//get all user's courses
		$courses = WPCW_users_getUserCourseList($user_id);
		//krumo($courses);
		
		//create array of ids minus the one we are removing
		$course_ids = array();
		foreach($courses as $course)
		{
			if($course->course_id != $pmpro_addon_pages_for_courses[$post_id])
				$course_ids[] = $course->course_id ;
		}
		
		//sync
		WPCW_courses_syncUserAccess($user_id, $course_ids);
	}
}
add_action('pmproap_action_remove_from_package', 'wpcw_pmproap_action_remove_from_package', 10, 2);

This recipe is included in the blog post on "Sell Single Courses using WP Courseware and Paid Memberships Pro" at Paid Memberships Pro here: https://www.paidmembershipspro.com/sell-single-courses-using-wp-courseware-and-paid-memberships-pro/