Create user for each ticket holder on Woocommerce Box Office.

box-office-functions.php

<?php


// Needs to run when creating order
// Also needs to run when editing a ticket
function create_users_from_ticket($order_id)
{
    if (!wc_get_order($order_id)) {
        return;
    }

    // Get Tickets from order ID
    $tickets = get_tickets_by_order($order_id);

    if (function_exists('wc_box_office_get_ticket_email_contacts')) {
        foreach ($tickets as $ticket) {
            $ticket_id = $ticket->ID;
            add_user_to_ticket_from_email($ticket_id);
        }
    }
}
add_action('woocommerce_thankyou', 'create_users_from_ticket', 10, 1);


function add_user_to_ticket_from_email($ticket_id)
{
    // Find emails in ticket. Only works with 1 email at the moment.
    $user_email = wc_box_office_get_ticket_email_contacts($ticket_id)[0];
    // If has ticket_holder_user meta, remove this.
    // This is to remove previous owner if user changes email on ticket
    if (get_post_meta($ticket_id, 'ticket_holder_user')) {
        delete_post_meta($ticket_id, 'ticket_holder_user');
    }
    $user_id = email_exists($user_email);

    // If user doesn't exist we create a new one
    if (!$user_id) {

        // Password is auto generated and sent to user
        $user_id = wc_create_new_customer($user_email, $user_email);
    }
    // Add meta connecting ticket to user
    update_post_meta($ticket_id, 'ticket_holder_user', $user_id);
}
add_action('woocommerce_box_office_after_edit_ticket_form', 'add_user_to_ticket_from_email', 10, 1);


// Helper function to get tickets of user
function get_user_holder_tickets($user_id)
{
    $args = array(
        'post_type'      => 'event_ticket',
        'post_status'    => array( 'publish', 'pending' ),
        'posts_per_page' => -1,
        'meta_query' => array(
            array(
                'key'   => 'ticket_holder_user',
                'value' => $user_id,
            ),
        ),
    );

    return get_posts($args);
}

// Helper function for getting tickets for order
function get_tickets_by_order($order_id)
{
    $args = array(
        'post_type'      => 'event_ticket',
        'post_status'    => array( 'publish', 'pending' ),
        'posts_per_page' => -1,
        'meta_query' => array(
            array(
                'key'   => '_order',
                'value' => $order_id,
            ),
        ),
    );

    return get_posts($args);
}