LearnDash In App Purchases plugin for AppPresser

iap-learndash-2020.php

<?php
/*
Plugin Name: AppPresser In App Purchases for LearnDash
Plugin URI: https://apppresser.com
Description: This plugin listens for in app purchases or cancellations and adds/removes members from a LearnDash course.
Version: 1.0.0
Author: Scott Bolinger
Author URI: https://apppresser.com
License: GPLv2
*/

class AppPresser_IAP_LD {

	public static $instance   = null;
	// change this to the post ID of the course
	public static $ld_course_post_id = 123;

	/**
	 * Creates or returns an instance of this class.
	 * @since	1.0.0
	 * @return AppPresser A single instance of this class.
	 */
	public static function get() {
		if ( self::$instance === null )
			self::$instance = new self();

		return self::$instance;
	}

	/**
	 * 
	 * @since	1.0.0
	 */
	function __construct() {

		self::hooks();

	}

	public function hooks() {

		add_action( 'iap_new_purchase_request', array( $this, 'new_purchase' ), 10, 3 );

		add_action( 'iap_subscription_cancel_request', array( $this, 'cancel_membership' ), 10, 3 );

	}

	/*
	 * This function is called when a new purchase is created. Add the user to the appropriate membership level here.
	 */
	public function new_purchase( $user_email, $purchase, $request ) {

		$user_email = ( isset( $request['applicationUsername'] ) ? $request['applicationUsername'] : null );

		AppPresser_Logger::log( 'New purchase from email: ', $user_email );

		$user = get_user_by( 'email', $user_email );

		if( !$user || is_wp_error( $user ) ) {
			return new WP_Error( 'rest_user_error',
				__( 'Cannot get user for ' . $user_email, 'apppresser' ),
				array(
					'status' => 404,
				)
			);
		}

		$user_id = $user->ID;

		$course_id = learndash_get_course_id( self::$ld_course_post_id );

		// add user to course
		ld_update_course_access( $user_id, $course_id, $remove = false );

		// save this so we can cancel them later
		// we save the productId and course ID together so we know what course to cancel when the product is cancelled
		$saved_courses = get_user_meta( $user_id, 'iap_course_ids', 1 );
		if( empty( $saved_courses ) ) {
		    update_user_meta( $user_id, 'iap_course_ids', array( $purchase['productId'] . '-' . $course_id ) );
		} elseif( is_array( $saved_courses ) && !in_array( $course_id, $saved_courses ) ) {
		    $saved_courses[] = $purchase['productId'] . '-' . $course_id;
		    update_user_meta( $user_id, 'iap_course_ids', $saved_courses );
		}

			AppPresser_Logger::log( 'New in app purchase. User ' . $user_id . ' added to course ', $course_id );

	}

	/*
	 * This function is called when a membership is cancelled.
	 * A user can always click "restore membership" if their membership is cancelled in error.
	 */
	public function cancel_membership( $user_email, $purchase, $request ) {

		$user_email = ( isset( $request['applicationUsername'] ) ? $request['applicationUsername'] : null );

		$user = get_user_by( 'email', $user_email );

		if( !$user || is_wp_error( $user ) ) {
			return new WP_Error( 'rest_user_error',
				__( 'Cannot cancel membership, because cannot get user for ' . $user_email, 'apppresser' ),
				array(
					'status' => 404,
				)
			);
		}

		$user_id = $user->ID;

		AppPresser_Logger::log( 'Cancelling membership... ' . $user_id, 'Product id: ' . $purchase['productId'] );
		
		$saved_courses = get_user_meta( $user_id, 'iap_course_ids', 1 );

		$product_id = $purchase['productId'];

		if( is_array( $saved_courses ) ) {

			foreach ($saved_courses as $key => $value) {
				$course_exploded = explode("-", $value);
				$course_name = $course_exploded[0];
				$ld_course_id = $course_exploded[1];

				if( $course_name === $product_id ) {
					unset($saved_courses[$key]);
					AppPresser_Logger::log( 'User removed from course: ', $ld_course_id );
					ld_update_course_access( $user_id, $ld_course_id, $remove = true );
				}
			}

			update_user_meta( $user_id, 'iap_course_ids', $saved_courses );
			
		}

	}

}

AppPresser_IAP_LD::get();