Sell PMPro Series through AddOn Packages

sell-series-addon-packages.php

<?php
/**
 * Adds the AddOn Package post meta to 'Series' post type.
 * Give access if they purchased "Series" parent container.
 * Add this code to your PMPro Customizations Plugin - https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
 
function add_pmpro_series_to_AP( $types ) {
	$types[] = 'pmpro_series';

	return $types;
}
add_filter( 'pmproap_supported_post_types', 'add_pmpro_series_to_AP', 10, 1 );

function pmpro_give_access_to_users_for_series( $hasaccess, $mypost, $myuser, $post_membership_levels) {

	$post_id = $mypost->ID;

	$is_in_series = get_post_meta( $post_id, '_post_series', true );

	$ap_posts = get_user_meta( $myuser->ID, '_pmproap_posts', true );

	// Bail if nothing is found and return current access.
	if ( empty( $ap_posts) || empty( $is_in_series) ) {
		return $hasaccess;
	}

	if ( in_array( $is_in_series[0], $ap_posts ) ) {
		$hasaccess = true;
	}

	return $hasaccess;
}
add_filter('pmpro_has_membership_access_filter', 'pmpro_give_access_to_users_for_series', 10, 4 );