WP - Custom tax query for NSP Advanced Post Types Order

WP-custom-tax-advanced-post-order.php

<?php

/*
I needed a way to override sort list query rules in the admin with my own custom tax queries.
So I created a list using the default query rules, saved the unique reorder sort ID to a page as a custom field
and used it to alter and assign the new tax query.
NSP Advanced Post Types Order Plugin - http://www.nsp-code.com/advanced-post-types-order-api/sample-usage/
*/

add_filter( 'apto_interface_query_args', 'linkReorderLists', 10, 2 );

function linkReorderLists( $args, $sort_view_id ) {

    // get reorder sort ID that is being passed
    $sortID = $args['sort_id'];

    // find page where I'm saving unique reorder sort ID as custom field
    $reorderCarousels = new WP_Query( array(
      'post_type' => 'page',
      'meta_key' => 'carousel_sort_id',
      'meta_value' => $sortID )
    );

    // run through custom tax query, this will now link to $sortID
    if ( $reorderCarousels->have_posts() ) {
      while ( $reorderCarousels->have_posts() ) {
        $reorderCarousels->the_post();
        $args['tax_query'] = array(
          'relation' => 'OR',
          array(
           'relation' => 'AND',
           array(
             'taxonomy' => 'category',
             'field'    => 'slug',
             'include_children' => false,
             'terms'    => array( 'example-cat-1', 'example-cat-2' ),
           ),
           array(
             'taxonomy' => 'category',
             'field'    => 'slug',
             'terms'    => array( 'example-cat-3', 'example-cat-4' ),
           ),
         ));
      }
    }
    wp_reset_postdata();

  return $args;

}

?>