/**
     * Gets all the attendee and event meta from an attendee ID.
     *
     * @param  Int   $attendee_id The attendee ID.
     * @return array The data to sync to the CRM.
     */

    public function get_attendee_meta( $attendee_id ) {

        // Get the event ID (Tribe annoyingly stores these all in different keys)

        $event_id  = get_post_meta( $attendee_id, '_tribe_wooticket_event', true );
        $ticket_id = get_post_meta( $attendee_id, '_tribe_wooticket_product', true );

        if ( empty( $event_id ) ) {
            $event_id  = get_post_meta( $attendee_id, '_tribe_eddticket_event', true );
            $ticket_id = get_post_meta( $attendee_id, '_tribe_eddticket_product', true );
        }

        if ( empty( $event_id ) ) {
            $event_id  = get_post_meta( $attendee_id, '_tribe_rsvp_event', true );
            $ticket_id = get_post_meta( $attendee_id, '_tribe_rsvp_product', true );
        }

        // This is a bit tricky. When Allow Individual Attendee Collection is off, this will be the purchaser's
        // email. Also if it's on, but left blank.

        $attendee_email = get_post_meta( $attendee_id, '_tribe_tickets_email', true );

        if ( empty( $attendee_email ) ) {
            $attendee_email = get_post_meta( $attendee_id, '_tribe_rsvp_email', true );
        }

        $venue_id       = get_post_meta( $event_id, '_EventVenueID', true );
        $event_date     = get_post_meta( $event_id, '_EventStartDate', true );
        $event_address  = get_post_meta( $venue_id, '_VenueAddress', true );
        $event_city     = get_post_meta( $venue_id, '_VenueCity', true );
        $event_country  = get_post_meta( $venue_id, '_VenueCountry', true );
        $event_state    = get_post_meta( $venue_id, '_VenueState', true );
        $event_province = get_post_meta( $venue_id, '_VenueProvince', true );
        $event_zip      = get_post_meta( $venue_id, '_VenueZip', true );

        $event_time = date( 'g:ia', strtotime( $event_date ) );

        $update_data = array(
            'user_email'     => $attendee_email,
            'ticket_name'    => get_the_title( $ticket_id ),
            'event_name'     => get_the_title( $event_id ),
            'event_date'     => $event_date,
            'event_time'     => $event_time,
            'venue_name'     => get_the_title( $venue_id ),
            'event_address'  => $event_address,
            'event_city'     => $event_city,
            'event_state'    => $event_state,
            'event_province' => $event_province,
            'event_country'  => $event_country,
            'event_zip'      => $event_zip,
        );

        // Name

        $full_name = get_post_meta( $attendee_id, '_tribe_tickets_full_name', true );

        if ( empty( $full_name ) ) {
            $full_name = get_post_meta( $attendee_id, '_tribe_rsvp_full_name', true );
        }

        if ( ! empty( $full_name ) ) {

            $parts                     = explode( ' ', $full_name, 2 );
            $update_data['first_name'] = $parts[0];

            if ( isset( $parts[1] ) ) {
                $update_data['last_name'] = $parts[1];
            }
        }

        // Organizer

        $organizer_id = get_post_meta( $event_id, '_EventOrganizerID', true );

        if ( ! empty( $organizer_id ) ) {

            $organizer_data = array(
                'organizer_name'    => get_the_title( $organizer_id ),
                'organizer_phone'   => get_post_meta( $organizer_id, '_OrganizerPhone', true ),
                'organizer_website' => get_post_meta( $organizer_id, '_OrganizerWebsite', true ),
                'organizer_email'   => get_post_meta( $organizer_id, '_OrganizerEmail', true ),
            );

            $update_data = array_merge( $update_data, $organizer_data );

        }

        $ticket_meta = get_post_meta( $attendee_id, '_tribe_tickets_meta', true );

        if ( ! empty( $ticket_meta ) ) {

            $update_data = array_merge( $update_data, $ticket_meta );

            // Cases where a custom email field needs to take priority over the standard email field

            foreach ( $ticket_meta as $key => $value ) {

                if ( ! is_array( $value ) && is_email( $value ) && wpf_is_field_active( $key ) && wpf_get_crm_field( $key ) == wpf_get_crm_field( 'user_email' ) ) {
                    $update_data['user_email'] = $value;
                }
            }
        }

        // Possible additional event meta

        $event_meta = get_post_meta( $event_id );
        if ( ! empty( $event_meta ) && is_array( $event_meta ) ) {
            foreach ( $event_meta as $key => $value ) {

                if ( 0 === strpos( $key, '_ecp_custom_' ) ) {
                    $update_data[ $key ] = $value[0];
                }
            }
        }

        /**
         * Filter the attendee data.
         *
         * @since 3.37.13
         *
         * @link  https://wpfusion.com/documentation/filters/wpf_event_tickets_attendee_data/
         *
         * @param array $update_data The attendee data to sync to the CRM.
         * @param int   $attendee_id The attendee ID.
         */

        $update_data = apply_filters( 'wpf_event_tickets_attendee_data', $update_data, $attendee_id );

        return $update_data;

    }