<?php
/* filter to get "services" in product categories, child categories, and singe product pages correctly */
// /services/%product_cat%/ - permalinks 'base' settings

add_filter('rewrite_rules_array', function( $rules ) {
    $new_rules = array(
        'services/([^/]*?)/page/([0-9]{1,})/?$' => 'index.php?product_cat=$matches[1]&paged=$matches[2]',
        'services/([^/]*?)/([^/]*?)/page/([0-9]{1,})/?$' => 'index.php?product_cat=$matches[2]&paged=$matches[3]',
        'services/([^/]*?)/?$' => 'index.php?product_cat=$matches[1]',
        'services/([^/]*?)/([^/]*?)/?$' => 'index.php?product_cat=$matches[2]',
    );
    return $new_rules + $rules;
});

add_filter('request', function( $vars ) {
    global $wpdb;
    if (!empty($vars['pagename']) || !empty($vars['category_name']) || !empty($vars['name']) || !empty($vars['attachment'])) {
        $slug = !empty($vars['pagename']) ? $vars['pagename'] : (!empty($vars['name']) ? $vars['name'] : (!empty($vars['category_name']) ? $vars['category_name'] : $vars['attachment'] ) );
        $new_slug = $vars["product_cat"] . "/$slug";
        $cat = getCategoryByPath($new_slug, 'product_cat');
        if($cat){
            $old_vars = $vars;
            $vars = array('product_cat' => $new_slug);
            if (!empty($old_vars['paged']) || !empty($old_vars['page']))
                $vars['paged'] = !empty($old_vars['paged']) ? $old_vars['paged'] : $old_vars['page'];
        }
    }elseif (!empty($vars['product_cat'])) {
        $slug = $vars['product_cat'];
        $cat = getCategoryByPath($slug, 'product_cat', 0);

        if(!$cat && get_page_by_path( $slug, OBJECT, 'product')){
            $vars["product"] = $slug;
            $vars["post_type"] = "product";
            $vars["name"] = $slug;
        }

    }
    return $vars;
});
function getCategoryByPath($path, $tax, $check_parent = 1 ){
    global $wpdb;

    $slugs = explode('/', $path);
    $parent = 0;
    foreach ($slugs as $k => $slug) {
        $args = array(
            'hide_empty' => false,
            'slug' => $slug,
        );
        if($check_parent)
            $args['parent'] = $parent;

        $terms = $terms = get_terms($tax, $args);

        if($terms && count($terms) == 1){
            $term = $terms[0];
            $parent = $term->term_id;

            if($k == count($slugs) - 1)
                return $term;
        }else{
            break;
        }
    }
    return false;
}
/* end of filter */