[Membership 2] - PayPal Profile Link. Adds a link to PayPal's profile page in M2 Subscription page

ms-pp-profile-link.php

<?php
/**
* Plugin Name: [Membership 2] - PayPal Profile Link
* Plugin URI: https://premium.wpmudev.org/
* Description: Adds a link to PayPal's profile page in M2 Subscription page
* Author: Panos Lyrakis @ WPMUDEV
* Author URI: https://premium.wpmudev.org/
* License: GPLv2 or later
*/


if ( ! defined( 'ABSPATH' ) ) {
    exit;
}


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

        private static $_instance = null;
        private static $gateway_id = 'paypalstandard';
        private static $mode = 'sandbox'; // Change to 'live' for live transactions
        private static $pp_url = 'https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_profile-recurring-payments'; // This will be changed in constructor when mode is set to `live`


        public static function get_instance() {

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

        private function __construct() {

            if ( ! class_exists( 'MS_Factory' ) ) {
                return;
            }
            if ( 'live' == self::$mode ) {
                self::$pp_url = 'https://www.paypal.com/cgi-bin/webscr?cmd=_profile-recurring-payments';
            }

            add_filter( 'ms_view_member_editor_fields_edit', array( $this, 'subscription_page_fields' ) );

        }

        public function subscription_page_fields( $fields ) {

            foreach ( $fields['subscriptions'] as $key => $field ) {

                if ( isset( $field['title'] ) ) {
                    $subscription_id = $field['value'][0][1];

                    if ( empty( $subscription_id ) || ! is_numeric( $subscription_id ) ) {
                        continue;
                    }

                    $subscription = MS_Factory::load( 'MS_Model_Relationship', $subscription_id );

                    if ( $subscription->gateway_id != self::$gateway_id ) {
                        return $fields;
                    }
                    
                    $profile_id = $this->get_profile_id( $subscription->id );

                    if ( ! $profile_id ) {
                        return $fields;
                    }

                    $profile_url = add_query_arg( 'encrypted_profile_id', $profile_id, self::$pp_url );                    
                    $fields['subscriptions'][$key]['value'][] = array( 'Link to PayPal Profile', "<a href=\"{$profile_url}\">PayPal Profile</a>" );
                }


            }
            return $fields;

        }

        public function get_profile_id( $subscription_id ) {

            if ( is_object( $subscription_id ) ) {
                if ( ! isset( $subscription_id->id ) ) {
                    return false;
                }

                $subscription_id = $subscription_id->id;
            }

            $transaction = $this->get_subscription_last_transaction( $subscription_id );            
            $transaction_post_meta = get_post_meta( $transaction->ID, 'post', true );

            return isset( $transaction_post_meta['subscr_id'] ) ? $transaction_post_meta['subscr_id'] : false;

        }



        public function get_subscription_last_transaction( $subscription_id ) {

            if ( is_object( $subscription_id ) ) {
                if ( ! isset( $subscription_id->id ) ) {
                    return false;
                }

                $subscription_id = $subscription_id->id;
            }

            $transaction = array();
            $args = array(
                'numberposts'       => 1,
                'offset'            => 0,
                'post_status'       => 'any', // OR 'private', as transaction logs have private status in posts table
                'post_type'         => 'ms_transaction_log',
                'meta_query' => array(
                   array(
                       'key'        => 'subscription_id',
                       'value'      => $subscription_id,
                       'compare'    => '=',
                   ),
                   array(
                        'key'       => 'success',
                        'value'     => 'ok',
                        'compare'   => '='
                   )
               )
            );

            $transactions = get_posts( $args );

            if ( ! empty( $transactions ) ) {
                return $transactions[0];
            }
            else {
                return false;
            }

        }


    }

    if ( ! function_exists( 'wpmudev_ms_pp_profile_link' ) ) {

        function wpmudev_ms_pp_profile_link(){           
            return WPMUDEV_MS_PP_Profile_Link::get_instance();
        };

        add_action( 'plugins_loaded', 'wpmudev_ms_pp_profile_link', 10 );
    }

}