[Membership 2 Pro] - Forces Pending status to new subscription made from admin

ms-force-pending-status.php

<?php
/*
Plugin Name: Membership - Force Pending status
Plugin URI: https://premium.wpmudev.org/
Description: Forces Pending status to new subscription made from admin
Author: Panos Lyrakis @ WPMUDEV
Author URI: https://premium.wpmudev.org/
License: GPLv2 or later
*/
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! class_exists( 'WPMUDEV_MS_Force_Pending' ) ) {
	
	class WPMUDEV_MS_Force_Pending {

		private static $_instance = null;

		public static function get_instance() {

			if( is_null( self::$_instance ) ){
				self::$_instance = new WPMUDEV_MS_Force_Pending();
			}

			return self::$_instance;
		}

		public function __construct() {

			add_action( 'ms_model_member_add_membership', array( $this, 'update_subscription_status' ), 10, 5 );
			add_action( 'ms_model_relationship_handle_status_change_after', array( $this, 'send_notification' ), 10, 2 );
			//add_action( 'ms_model_relationship_handle_status_change_after', array( $this, 'update_subscription_status' ), 10, 2 );

		}

		public function update_subscription_status( $subscription, $membership_id, $gateway_id, $move_from_id, $MS_Model_Member ){
		
			global $pagenow;

			if( ! is_admin() || $pagenow != 'admin.php' || ! isset( $_GET['page'] ) || $_GET['page'] != 'membership2-add-member' ){
				return $subscription;
			}

			$data = $_POST;

			if( empty( $data ) || 
				! isset( $data['action'] ) || $data['action'] != 'member_subscription' ||
				! isset( $data['user_id'] ) || ! is_numeric( $data['user_id'] ) ){
				return $subscription;
			}

			//$membership_ids = isset( $data['subscribe'] ) && is_array( $data['subscribe'] ) ? $data['subscribe'] : false;

			if( ! $data['subscribe'] || empty( $data['subscribe'] ) ){
				return $subscription;
			}

			//$membership = MS_Factory::load( 'MS_Model_Membership', intval( $membership_id ) );

			$subscription->handle_status_change( MS_Model_Relationship::STATUS_PENDING );

			return $subscription;
		}


		public static function send_notification( $status, $subscription ){

			global $pagenow;

			if( ! is_admin() || $pagenow != 'admin.php' || ! isset( $_GET['page'] ) || $_GET['page'] != 'membership2-add-member' ){
				return;
			}

			$data = $_POST;

			if( empty( $data ) || 
				! isset( $data['action'] ) || $data['action'] != 'member_subscription' ||
				! isset( $data['user_id'] ) || ! is_numeric( $data['user_id'] ) ){
				return;
			}

			if( ! $data['subscribe'] || empty( $data['subscribe'] ) ){
				return;
			}

			$membership = MS_Factory::load( 'MS_Model_Membership', intval( $subscription->membership_id ) );
			
			$user_id = absint( $data['user_id'] );
			$user = MS_Factory::load( 'MS_Model_Member', $user_id );
			$blog_title = get_bloginfo( 'name' );
			$blog_email = get_bloginfo( 'admin_email' );
			$checkout_url = MS_Model_Pages::get_page_url( MS_Model_Pages::MS_PAGE_MEMBERSHIPS ). '?step=payment_tablemembership_id=' . $subscription->membership_id;

			$notification_subject 	= "You have a new Pending membership!";
			$notification_body 		= "<p>Hi {$user->name}!</p>";
			$notification_body 		.= "<p>You have a new subscription on {$blog_title} for membership <srong>{$membership->name}</strong> which is currently pending</p>";
			$notification_body 		.= "<p>Please follow this <a href='{$checkout_url}'>activation link</a> in order to activate the subscription</p>";
			$notification_body 		.= "<p>The {$blog_title} team</p>";

			//$headers = array("Content-Type: text/html; charset=UTF-8","From: {$blog_title} <{$blog_email}>");
			wp_mail( $user->email, $notification_subject, $notification_body );
			
		}

	}

	add_action( 'plugins_loaded', function(){
		$GLOBALS['WPMUDEV_MS_Force_Pending'] = WPMUDEV_MS_Force_Pending::get_instance();
	}, 10 );
}