Fixes - Multi Step Form (PRO)

add_action( 'wpcf7_before_send_mail', 'drag_and_drop_cf7', 9, 2 );

function drag_and_drop_cf7( $form, $results ){
    $posted_data = WPCF7_Submission::get_instance()->get_posted_data();
    if ( !empty( $posted_data['cf7msm_options'] ) ) {
        $options = json_decode( stripslashes( $posted_data['cf7msm_options'] ), true );
        if ( ! isset( $options['last_step'] ) ) {
            remove_action('wpcf7_before_send_mail','dnd_cf7_before_send_mail', 30, 1);
        }else{
            add_action('wpcf7_before_send_mail', 'drag_and_drop_cf7_files', 30, 1 );
        }
    }
}

function drag_and_drop_cf7_files( $wpcf7 ){

    $posted_data =  WPCF7_Submission::get_instance()->get_posted_data();
    $uploader_name = 'your-file';

    $mail = $wpcf7->prop('mail');
    $mail_2 = $wpcf7->prop('mail_2');

    if( isset( $posted_data[ $uploader_name ] ) ){

        $uploads_dir = dnd_get_upload_dir();
        $files = array();

        if( strpos( $posted_data[ $uploader_name ], ',' ) !== false ){
            $files_array = explode(',', $posted_data[ $uploader_name ] );
            if( $files_array ){
                foreach( $files_array as $file ){
                    $files[] = trailingslashit( $uploads_dir['upload_url'] ) . wp_basename( $file );
                }
            }
        }else{
            $files[] = trailingslashit( $uploads_dir['upload_url'] ) . wp_basename( $posted_data[ $uploader_name ] );
        }

        // Links - 1
        $mail_links = dnd_cf7_links( $files, $mail['use_html'] );
        $mail['body'] = str_replace( "[$uploader_name]", "\n" . implode( "\n", $mail_links ), $mail['body'] );

        // Links - 2
        if( $mail_2['active'] ) {
            $mail_links_2 = dnd_cf7_links( $files, $mail_2['use_html'] );
            $mail_2['body'] = str_replace( "[$uploader_name]", "\n" . implode( "\n", $mail_links_2 ), $mail_2['body'] );
        }
    }

    $wpcf7->set_properties( array("mail" => $mail) );

    if( $mail_2['active'] ) {
        $wpcf7->set_properties( array("mail_2" => $mail_2) );
    }

    return $wpcf7;
}