我正在试图在处理woocommerce订单时将用户名和姓氏插入数据库。我已经设法在数据库中输入了两个空白字段，我需要它们，但是我很难让用户的名字和姓氏发布。下面是我目前掌握的代码，有人能给我指出正确的方向吗？

// add user firstname
    if ( ! $order_data[\'user_firstname\'] ) {
        if ( is_user_logged_in() ) {
            $order_data[\'user_firstname\'] = get_currentuserinfo($current_user->user_firstname);
        } else {
            $order_data[\'user_firstname\'] = 0;
        }
    }

    // add user surname
    if ( ! $order_data[\'user_surname\'] ) {
        if ( is_user_logged_in() ) {
            $order_data[\'user_surname\'] = get_currentuserinfo($current_user->user_lastname);
        } else {
            $order_data[\'user_surname\'] = 0;
        }
    }

/**
* Main model class for all bookings, this handles all the data
*/
class WC_Booking {

    /** @public int */
    public $id;

    /** @public string */
    public $booking_date;

    /** @public string */
    public $start;

    /** @public string */
    public $end;

    /** @public bool */
    public $all_day;

    /** @public string */
    public $modified_date;

    /** @public object */
    public $post;

    /** @public int */
    public $product_id;

    /** @public object */
    public $product;

    /** @public int */
    public $order_id;

    /** @public object */
    public $order;

    /** @public int */
    public $customer_id;

    /** @public string */
    public $status;

    /** @public array - contains all post meta values for this booking */
    public $custom_fields;

    /** @public bool */
    public $populated;

    /** @private array - used to temporarily hold order data for new bookings */
    private $order_data;

    /**
     * Constructor, possibly sets up with post or id belonging to existing booking
     * or supplied with an array to construct a new booking
     * @param int/array/obj $booking_data
     */
    public function __construct( $booking_data = false ) {
        $populated = false;

        if ( is_array( $booking_data ) ) {
            $this->order_data = $booking_data;
            $populated = false;
        } else if ( is_int( intval( $booking_data ) ) && 0 < $booking_data ) {
            $populated = $this->populate_data( $booking_data );
        } else if ( is_object( $booking_data ) && isset( $booking_data->ID ) ) {
            $this->post = $booking_data;
            $populated = $this->populate_data( $booking_data->ID );
        }

        $this->populated = $populated;
    }

    /**
     * Actual create for the new booking belonging to an order
     * @param string Status for new order
     */
    public function create( $status = \'unpaid\' ) {
        $this->new_booking( $status, $this->order_data );
        $this->schedule_events();
    }

    /**
     * Schedule events for this booking
     */
    public function schedule_events() {
        switch ( get_post_status( $this->id ) ) {
            case "paid" :
                if ( $this->start ) {
                    wp_schedule_single_event( strtotime( \'-\' . absint( apply_filters( \'woocommerce_bookings_remind_before_days\', 1 ) ) . \' day\', $this->start ), \'wc-booking-reminder\', array( $this->id ) );
                }
                if ( $this->end ) {
                    wp_schedule_single_event( $this->end, \'wc-booking-complete\', array( $this->id ) );
                }
            break;
            default :
                wp_clear_scheduled_hook( \'wc-booking-reminder\', array( $this->id ) );
                wp_clear_scheduled_hook( \'wc-booking-complete\', array( $this->id ) );
            break;
        }
    }

    /**
     * Makes the new booking belonging to an order
     * @param string $status The status for this new booking
     * @param array $order_data Array with all the new order data
     */
    private function new_booking( $status, $order_data ) {
        global $wpdb;

        $order_data = wp_parse_args( $order_data, array(
            \'user_id\'           => 0,
            \'resource_id\'       => \'\',
            \'product_id\'        => \'\',
            \'order_item_id\'     => \'\',
            \'persons\'           => array(),
            \'cost\'              => \'\',
            \'start_date\'        => \'\',
            \'end_date\'          => \'\',
            \'all_day\'           => 0,
            \'parent_id\'         => 0,
        ) );

        // Get parent data
        if ( $order_data[\'parent_id\'] ) {
            if ( ! $order_data[\'order_item_id\'] )
                $order_data[\'order_item_id\'] = get_post_meta( $order_data[\'parent_id\'], \'_booking_order_item_id\', true );

            if ( ! $order_data[\'user_id\'] )
                $order_data[\'user_id\'] = get_post_meta( $order_data[\'parent_id\'], \'_booking_customer_id\', true );
        }

        // Get order ID from order item
        if ( $order_data[\'order_item_id\'] )
            $order_id = $wpdb->get_var( $wpdb->prepare( "SELECT order_id FROM {$wpdb->prefix}woocommerce_order_items WHERE order_item_id = %d", $order_data[\'order_item_id\'] ) );
        else
            $order_id = 0;

        $booking_data = array(
            \'post_type\'   => \'wc_booking\',
            \'post_title\'  => sprintf( __( \'Booking &ndash; %s\', \'woocommerce-bookings\' ), strftime( _x( \'%b %d, %Y @ %I:%M %p\', \'Booking date parsed by strftime\', \'woocommerce-bookings\' ) ) ),
            \'post_status\' => $status,
            \'ping_status\' => \'closed\',
            \'post_parent\' => $order_id
        );

        $this->id = wp_insert_post( $booking_data );

        // Setup the required data for the current user
        if ( ! $order_data[\'user_id\'] ) {
            if ( is_user_logged_in() ) {
                $order_data[\'user_id\'] = get_current_user_id();
            } else {
                $order_data[\'user_id\'] = 0;
            }
        }

    $user_info = wp_get_current_user();

if ( is_user_logged_in() ) {
    $order_data[\'user_firstname\'] = $user_info->user_firstname;
    // add user surname
    $order_data[\'user_surname\'] = $user_info->user_lastname;
}

        // Convert booking start and end to requried format
        if ( is_numeric( $order_data[\'start_date\'] ) ) {
            // Convert timestamp
            $order_data[\'start_date\'] = date( \'YmdHis\', $order_data[\'start_date\'] );
            $order_data[\'end_date\']   = date( \'YmdHis\', $order_data[\'end_date\'] );
        } else {
            $order_data[\'start_date\'] = date( \'YmdHis\', strtotime( $order_data[\'start_date\'] ) );
            $order_data[\'end_date\']   = date( \'YmdHis\', strtotime( $order_data[\'end_date\'] ) );
        }

        $meta_args = array(
            \'_booking_order_item_id\' => $order_data[\'order_item_id\'],
            \'_booking_product_id\'    => $order_data[\'product_id\'],
            \'_booking_resource_id\'   => $order_data[\'resource_id\'],
            \'_booking_persons\'       => $order_data[\'persons\'],
            \'_booking_cost\'          => $order_data[\'cost\'],
            \'_booking_start\'         => $order_data[\'start_date\'],
            \'_booking_end\'           => $order_data[\'end_date\'],
            \'_booking_all_day\'       => intval( $order_data[\'all_day\'] ),
            \'_booking_parent_id\'     => $order_data[\'parent_id\'],
            \'_booking_customer_id\'   => $order_data[\'user_id\'],
            // hp extras
            \'_booking_customer_firstname\'   => $order_data[\'user_firstname\'],
            \'_booking_customer_surname\'   => $order_data[\'user_surname\'],
        );

        foreach ( $meta_args as $key => $value ) {
            update_post_meta( $this->id, $key, $value );
        }

        do_action( \'woocommerce_new_booking\', $this->id );
    }

    /**
     * Populate the data with the id of the booking provided
     * Will query for the post belonging to this booking and store it
     * @param int $booking_id
     */
    public function populate_data( $booking_id ) {
        if ( ! isset( $this->post ) ) {
            $post = get_post( $booking_id );
        }

        if ( is_object( $post ) ) {
            // We have the post object belonging to this booking, now let\'s populate
            $this->id            = $post->ID;
            $this->booking_date  = $post->post_date;
            $this->modified_date = $post->post_modified;
            $this->customer_id   = $post->post_author;
            $this->custom_fields = get_post_meta( $this->id );
            $this->status        = $post->post_status;
            $this->order_id      = $post->post_parent;

            // Define the data we\'re going to load: Key => Default value
            $load_data = array(
                \'product_id\'  => \'\',
                \'resource_id\' => \'\',
                \'persons\'     => array(),
                \'cost\'        => \'\',
                \'start\'       => \'\',
                \'customer_id\' => \'\',
                \'end\'         => \'\',
                \'all_day\'     => 0,
                \'parent_id\'   => 0,
                \'user_firstname\' => \'\',
                \'user_surname\' => \'\',

            );

            // Load the data from the custom fields (with prefix for this plugin)
            $meta_prefix = \'_booking_\';

            foreach ( $load_data as $key => $default ) {
                if ( isset( $this->custom_fields[ $meta_prefix . $key ][0] ) && $this->custom_fields[ $meta_prefix . $key ][0] !== \'\' ) {
                    $this->$key = maybe_unserialize( $this->custom_fields[ $meta_prefix . $key ][0] );
                } else {
                    $this->$key = $default;
                }
            }

            // Start and end date converted to timestamp
            $this->start = strtotime( $this->start );
            $this->end   = strtotime( $this->end );

            // Save the post object itself for future reference
            $this->post = $post;
            return true;
        }

        return false;
    }

    /**
     * Will change the booking status once the order is paid for
     * @return bool
     */
    public function paid() {
        $current_status = $this->status;

        if ( $this->populated && in_array( $current_status, array( \'unpaid\', \'confirmed\' ) ) ) {
            $this->update_status( \'paid\' );
            return true;
        }

        return false;
    }

    /**
     * Set the new status for this booking
     * @param string $status
     * @return bool
     */
    public function update_status( $status ) {
        $current_status   = $this->get_status( true );
        $allowed_statuses = array( \'unpaid\', \'pending\', \'confirmed\', \'paid\', \'cancelled\', \'complete\' );

        if ( $this->populated ) {
            if ( in_array( $status, $allowed_statuses ) ) {
                wp_update_post( array( \'ID\' => $this->id, \'post_status\' => $status ) );

                // Reschedule cron
                $this->schedule_events();

                // Trigger actions
                do_action( \'woocommerce_booking_\' . $current_status . \'_to_\' . $status, $this->id );
                do_action( \'woocommerce_booking_\' . $status, $this->id );

                return true;
            }
        }

        return false;
    }

    /**
     * Returns the status of this booking
     * @param Bool to ask for pretty status name (if false)
     * @return String of the booking status
     */
    public function get_status( $raw = true ) {
        if ( $this->populated ) {
            if ( $raw ) {
                return $this->status;
            } else {
                $status_object = get_post_status_object( $this->status );
                return $status_object->label;
            }
        }

        return false;
    }

    /**
     * Returns the id of this booking
     * @return Id of the booking or false if booking is not populated
     */
    public function get_id() {
        if ( $this->populated ) {
            return $this->id;
        }

        return false;
    }

    /**
     * Get the product ID for the booking
     * @return int or false if booking is not populated
     */
    public function get_product_id() {
        if ( $this->populated ) {
            return $this->product_id;
        }

        return false;
    }

    /**
     * Returns the object of the order corresponding to this booking
     * @return Product object or false if booking is not populated
     */
    public function get_product() {
        if ( ! isset( $this->product ) || empty( $this->product ) ) {
            if ( $this->populated && $this->product_id ) {
                $this->product = get_product( $this->product_id );
            } else {
                return false;
            }
        }

        return $this->product;
    }

    /**
     * Returns the object of the order corresponding to this booking
     * @return Order object or false if booking is not populated
     */
    public function get_order() {
        if ( empty( $this->order ) ) {
            if ( $this->populated && ! empty( $this->order_id ) && \'shop_order\' === get_post_type( $this->order_id ) ) {
                $this->order = new WC_Order( $this->order_id );
            } else {
                return false;
            }
        }

        return $this->order;
    }

    /**
     * Return if all day event
     * @return boolean
     */
    public function is_all_day() {
        if ( $this->populated ) {
            if ( $this->all_day ) {
                return true;
            } else {
                return false;
            }
        }
        return false;
    }

    /**
     * See if this booking is booked on said date
     * @return boolean
     */
    public function is_booked_on_day( $block_start, $block_end ) {
        if ( $this->populated ) {
            $loop_date        = $this->start;
            $multiday_booking = date( \'Y-m-d\', $this->start ) < date( \'Y-m-d\', $this->end );

            if ( $multiday_booking ) {
                if ( date( \'YmdHi\', $block_end ) > date( \'YmdHi\', $this->start ) || date( \'YmdHi\', $block_start ) < date( \'YmdHi\', $this->end ) ) {
                    return true;
                }
                return false;
            }

            while ( $loop_date <= $this->end ) {
                if ( date( \'Y-m-d\', $loop_date ) === date( \'Y-m-d\', $block_start ) ) {
                    return true;
                }
                $loop_date = strtotime( "+1 day", $loop_date );
            }
        }
        return false;
    }

    /**
     * Returns booking start date
     * @return string Date formatted via date_i18n
     */
    public function get_start_date( $date_format = null, $time_format = null ) {
        if ( $this->populated && ! empty( $this->start ) ) {
            if ( is_null( $date_format ) ) {
                $date_format = apply_filters( \'woocommerce_bookings_date_format\', \'M jS Y\' );
            }
            if ( is_null( $time_format ) ) {
                $time_format = apply_filters( \'woocommerce_bookings_time_format\', \', g:ia\' );
            }
            if ( $this->is_all_day() ) {
                return date_i18n( $date_format, $this->start );
            } else {
                return date_i18n( $date_format . $time_format, $this->start );
            }
        }

        return false;
    }

    /**
     * Returns booking end date
     * @return string Date formatted via date_i18n
     */
    public function get_end_date( $date_format = null, $time_format = null ) {
        if ( $this->populated && ! empty( $this->end ) ) {
            if ( is_null( $date_format ) ) {
                $date_format = apply_filters( \'woocommerce_bookings_date_format\', \'M jS Y\' );
            }
            if ( is_null( $time_format ) ) {
                $time_format = apply_filters( \'woocommerce_bookings_time_format\', \', g:ia\' );
            }
            if ( $this->is_all_day() ) {
                return date_i18n( $date_format, $this->end );
            } else {
                return date_i18n( $date_format . $time_format, $this->end );
            }
        }

        return false;
    }

    /**
     * Returns information about the customer of this order
     * @return array containing customer information
     */
    public function get_customer() {
        if ( $this->populated ) {
            $order = $this->get_order();

            if ( $order )
                return (object) array(
                    \'name\'    => trim( $order->billing_first_name . \' \' . $order->billing_last_name ),
                    \'email\'   => $order->billing_email,
                    \'user_id\' => $order->customer_user,
                );
            elseif ( $this->customer_id ) {
                $user = get_user_by( \'id\', $this->customer_id );

                return (object) array(
                    \'name\'    => $user->display_name,
                    \'email\'   => $user->user_email,
                    \'user_id\' => $this->customer_id
                );
            }
        }

        return false;
    }

    /**
     * Returns if persons are enabled/needed for the booking product
     * @return boolean
     */
    public function has_persons() {
        return $this->get_product()->has_persons();
    }

    /**
     * Returns if resources are enabled/needed for the booking product
     * @return boolean
     */
    public function has_resources() {
        return $this->get_product()->has_resources();
    }

    /**
     * Return a array with the booking persons.
     * @return array
     */
    public function get_persons() {
        return (array) $this->persons;
    }

    /**
     * Return the amount of persons for this booking.
     * @return int
     */
    public function get_persons_total() {
        return array_sum( $this->get_persons() );
    }

    /**
     * Get the resource id
     * @return int
     */
    public function get_resource_id() {
        return absint( $this->resource_id );
    }

    /**
     * Get the resource/type for this booking if applicable.
     * @return bool|object WP_Post
     */
    public function get_resource() {
        $resource_id = $this->get_resource_id();

        if ( ! $resource_id || ! $this->get_product() )
            return false;

        return $this->get_product()->get_resource( $resource_id );
    }
}