Sponsored members checkout URL when scanning QR code [Paid Memberships Pro]

pmpro-qr-code-sponsored-member.php

<?php
/**
 * If a user is a parent/sponsor member, set the QR code to the child checkout URL.
 * This will get the first sponsored level checkout URL and discount code.
 * Only set the QR code to the checkout URL if there are available seats.
 * Add this code to your site by visiting - https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
 
 function my_pmpro_membership_card_sponsored_members( $card_user, $option ) {

    // If the option isn't other, let's not run the code further down.
    if ( $option != 'other' ) {
        return $card_user->ID;
    }

    // Check if Sponsored Members is activated.
    if ( ! function_exists( 'pmprosm_isMainLevel' ) ) {
        return $card_user->ID;
    }

    // Check to make sure they have a level ID
    if ( empty( $card_user->membership_level->ID ) ) {
        return $card_user->ID;
    }

    // Check to see if the user has a "parent" level.
    if ( ! pmprosm_isMainLevel( $card_user->membership_level->ID ) ) {
        return $card_user->ID;
    }

    $user_level_id = $card_user->membership_level->ID;
    $code_id = pmprosm_getCodeByUserID( $card_user->ID );

    // Check if the user has a discount code (parent) and figure out the checkout URL for sponsored members.
    if ( ! empty( $code_id ) ) {
        $discount_code = pmprosm_getDiscountCodeByCodeID( $code_id );
        $uses = intval( $discount_code->uses );
        $children = count( pmprosm_getChildren( $card_user->ID ) );        
        $checkout_data = pmprosm_get_checkout_urls( $discount_code );
        $checkout_url = $checkout_data[0]['url']; //Only get the first checkout level.
    }

    // Only show the checkout URL if uses are available and not used up.
    if ( ! empty( $checkout_url ) && $children < $uses ) {
        return $checkout_url;
    } else {
        return $card_user->ID;
    }

    return $card_user->ID; 

 }
 add_filter( 'pmpro_membership_card_qr_data_other', 'my_pmpro_membership_card_sponsored_members', 10, 2 );